mining projects ball mill

ball mill-china hxjq mining machinery

ball mill-china hxjq mining machinery

Ball mill, as the key grinding equipment of the materials, is widely used for mineral grinding such as cement, lime, quartz, slag, silica, iron ore, copper ore, gold ore, bauxite, calcite, barite, gypsum and other minerals in mining, quarry, chemical, cement and other industries.

Ball mill is the necessary equipment in ore beneficiation plant. It is horizontal cylindrical rotation device,with one or two chambers. It plays an important role in kinds of metal ores grinding.

Compared with other powder grinding mill, ball mill can be used for wet and dry grinding of the materials. The commonly used grinding media in the ball mill is grinding steel balls and grinding bar. We will provide proper product model and grinding way according to the features of the materials and your requirements.

Our ball mill has full models for sale, you can choose the proper model according to your needs. If you are new in this industry, we will provide professional suggestions and solutions for you.

We are responsible for every part, every procedure and every machine. Both single equipment and full ore beneficiation plant are made to provide high quality & highly efficient product for you, guaranteeing the production efficiency.

Please feel free to fill in the following form or email us ([email protected]) to get product information,price,service and other supports.We will reply to you within 24 hours as soon as possible.Thank You!

major mines & projects | cobre panama mine

major mines & projects | cobre panama mine

The mineralised zones on the Cobre Panam property are examples of copper-gold-molybdenum porphyry deposits. Supergene mineralisation Oxidation of sulphides near the surface weathering profile has leached copper from the present-day saprolite. Copper has been weakly and irregularly re-precipitated in the upper zones of the deposits. Secondary sulphides are dominantly chalcocite with minor covellite and rare native copper. These secondary minerals occur as fracture infills, coatings on primary sulphide minerals and disseminations. Where these sulphides have been oxidised, malachite is the main copper oxide mineral.Notably absent across the majority of the Cobre Panam deposits is the presence of a significant zone of enrichment. It is interpreted that this is likely due to removal by erosion of a previously welldeveloped phyllic alteration zone which may have overlain these deposits. Phyllic alteration zones are suitable host rocks for re-precipitation of copper as they can sufficiently neutralise the acidic fluids required for leaching. A well-developed phyllic alteration zone is developed at Brazo, which accompanies a significant secondary copper sulphide mineralisation zone.Hypogene mineralisation Hypogene mineralisation within the granodiorite and various porphyry lithologies consists of disseminated sulphides, micro-veinlets, fracture fillings, veinlets and quartz-sulphide stockworks. Copper mineralisation occurs as chalcopyrite with lesser bornite. Throughout all deposits the proportion of bornite relative to chalcopyrite appears to increase with depth. Molybdenite is present in quartz B veinlets (Gustafson and Hunt, 1975). Pyrite is ubiquitous but the tenor increases in association with phyllic and chlorite-silica alteration compared to other alteration assemblages. Within the phyllic alteration zone, pyrite occurs as disseminations and within D veinlets (Gustafson and Hunt, 1975) with quartz. Minor specularite and magnetite mineralisation occurs as dissemination and veinlets in all deposits. Mineralisation on the contacts between the andesite and feldspar-hornblende-quartz porphyry can reach high copper tenor in zones of biotite hornfels. Chalcopyrite is the dominant sulphide with minor pyrite and rare bornite, occurring in veinlets, blebs and disseminations. This style of mineralisation is often cross-cut by quartz-sulphide veining. Botija The Botija deposit is located in the northeast area of the Cobre Panam concession. Botija is hosted in several feldspar-quartz-hornblende porphyry dykes (up to four) which range in thickness from 20 m to 200 m, and which have intruded the granodiorite and andesite host rocks. In general, the dip of the more distinct dykes is approximately 70 to the north. Two irregular, keel shaped andesite roof pendants of approximately 500 m in diameter have been identified at Botija (Rose et al, 2012), separated by approximately 300 m and reaching depths of between 200 m to 300 m. A smaller pendant, up to 250 m along strike and extending to a depth of 150 m sits to the north of the deposit. ColinaThe Colina deposit is focused on a 3.0 km long by 1.2 km wide feldspar-quartz-hornblende porphyry sill and dyke complex (lopolith) that trends east-southeast. The majority of the feldspar-quartz-hornblende porphyry comprises of 50 m to 200 m thick sills that dip shallowly to the north and are often interconnected by dykes. Valle GrandeThe Valle Grande deposit is located to the southeast of Colina and is 3.2 km long and 1 km wide, striking northwest-southeast . The deposit is focussed on an irregular feldspar-quartz-hornblende porphyry lopolith. BalboaMineralisation at Balboa is dominantly hosted by a feldspar-quartz-hornblende porphyry that intrudes the adjacent andesite at a low to moderate angle, emanating from the north-northwest. Mineralisation is best developed in the central portion of the porphyry but weakens towards the contacts with the andesite. The porphyry can locally be described as a crowded feldspar porphyry, with variable percentages of feldspar and lesser quartz phenocrysts which range in size from 1 mm to 4 mm. MedioMedio is located immediately east-northeast of the Colina deposit and 2 km northwest of the Botija deposit. Drilling has delineated a 1.3 km by 800 m area of low to moderate grade porphyry mineralisation. Mineralisation is associated with silicified and sericitised porphyritic intrusive rocks and brecciated andesite volcanics. Copper tenor appears to be strongly correlated to vein and fracture intensity. Botija AbajoBotija-Abajo is approximately 2.5 km southeast of Botija. Drilling, completed mainly by PTC identified two deposit areas, Botija Abajo East and Botija Abajo West. Mineralisation is primarily located within feldspar-quartz-porphyry with some mineralisation extending into the andesitic tuffs. BrazoThe Brazo deposit is located approximately 3 km south-southeast of Botija. Copper and gold mineralisation was identified in a feldspar-quartz porphyry with dominant sericite alteration. The Brazo deposit has an approximate area of 600 m by 700 m and remains open to the east, northeast and at depth.

Mining at Cobre Panama involves ultraclass scaled mining equipment and conventional open pit methods at up to approximately 83 Mbcm of ore and waste mined per annum. The multiple pits will be mined in an optimized sequence and in phases, with ore crushed in-pit and conveyed overland to the nearby processing plant. Each of the Cobre Panam deposits is amenable to large scale, conventional open pit mining methods comprising of typical drill and blast, shovel and haulage truck techniques.At the end of 2020, four rope shovels, three ultraclass loaders and thirty ultraclass trucks were operating in the Botija Pit. The Botija pit will be mined first, followed by the Colina and Media pits. Mining in the Valle Grande and BABR pits will commence towards the end of mining of the Colina pit, with the Balboa pit being mined last. The crusher feed is expected to ramps up to 85 Mtpa in 2021 and ultimately to 100 Mtpa in 2023 at which rate it remains until 2041 before dropping to 75Mtpa between 2042 and 2054. The overall life of mine strip ratio (tonnes) is 1:1.Building upon the technologies developed at other FQM operations, the Project features in-pit crushing and conveying (IPCC). Blasted ore will be hauled to IPCC installations strategically located within the open pits. These installations will be near surface at the outset, but will be moved deeper into the pits as mining proceeds over time. In-pit conveyors will be extended to suit and these will converge on surface at a central transfer station discharging to a permanent overland conveyor connecting to the plant site.Trolley-assisted haulageTrolley-assisted haulage is a concept that is being adopted during the early life of operations. The primary truck haulage fleet is being delivered trolley-assist ready (TA). Additional pit ramp width has been included in the detailed pit phase designs to allow for the physical placement of transformers and catenary wire poles . In places, these ramps could be extended onto the waste dumps.Waste dumping The planned waste dumps (referred to as waste rock storage facilities, WRSF) are located surrounding the various pits, wherever space dictates, and in areas that have been largely sterilised by exploratory drilling. The dump profiles have been designed with a 32 batter angle, a 30 m batter height, 26 m width berms, and minimum 55 m wide ramps at 1:10 gradient. The overall angle of each ultimate dump slope is approximately 22.Drilling and blastingNear-surface saprolite material is being mined essentially as free-dig. As and when required, bench development that requires blasting will be blasted on bench heights of between 5 and 10 m and using small diameter blast holes.Below this horizon, production drilling and blasting will take-place in rock conditions requiring a range of drilling/charging patterns and powder factors. Due to the mix of large and medium sized rotary drills there will be large and medium diameter holes used to blast ore and waste.High and medium grade ore is preferentially direct fed to the crushers. However, some of this tonnage must be mined and stockpiled and hence, high and medium grade ore stockpiles are considered to be active throughout the mine life.Long term low grade ore and saprock ore stockpiles are developed over the life of the mine and are not reclaimed until the final years of operations.

Mining is open-pit, using a fleet of ultraclass electric shovels and ultraclass haul trucks. Four in-pit semi-mobile primary crushers feed two overland conveyors to the secondary crushers and main processing complex. The three 28 megawatt SAG mills and four 16.5 megawatt ball mills installed at Cobre Panama are the largest installed anywhere in the world, except for Sentinel. Cobre Panamas eighth mill came on line in mid-December 2019, providing additional capacity on the third milling train. A series of small debottleneck projects were commissioned during 2020, targeting to an annualized throughput of 85 million tonnes for 2021. Mill throughput for the month of December 2019 was 6.6 million tonnes and during December 2020 was 6.2 million tonnes. The Cobre Panama Technical Report released in March 2019 includes the plan for expansion of Cobre Panama from 85 Mtpa to 100 Mtpa starting in 2023. Description (Technical Report, March 2019) The initial four primary gyratory crushers located in the Botija Pit are semi-mobile in-pit installations. The primary crushing circuit will comprise up to five semi-mobile, independent, gyratory crushers (3 x ThyssenKrupp KB 63 x 89 and 2 x ThyssenKrupp KB 63 x 130) operating in open circuit. Each crusher will be positioned in-pit and remote from the plant area, and crushed ore will be transported to the plant by an overland conveyor. Crushed ore will be conveyed out of the pit to a surface transfer point, and thence by dual overland conveyors to where it will discharge into either secondary crusher feed bins or bypass direct via apron feeders to a coarse ore stockpile at the concentrator. Two trains of six apron feeders feeders and conveyors will draw ore from below the coarse ore stockpile and feed two parallel wet-grinding lines, each consisting of a 28 MW semi-autogenous grinding (SAG) mill and two 16.5 MW ball mills, all equipped with gearless drives. A third train of six apron feeders and conveyors will feed to a third SAG mill linked to the other train of ball mills to maximise their usage and enable maintenance of the treatment rate whilst also being able to operate independently. The SAG mill circuits will be closed by a combination of trommel screens followed by washing screens; conveyors will deliver screen oversize to pebble crushers via metal removal systems. A dedicated system for the recycling of reject balls is provided. The pebble crushing circuits will include pebble bins, up to four cone crushers, and a bypass arrangement. Crushed pebbles will return to the SAG mills via the stockpile feed conveyors. The pebble crushing plant is located adjacent to the secondary crushers. A parallel pebble handling circuit provides for standby and direct return of pebbles to stockpile, so as to support crusher and bin maintenance. Discharge from each SAG mill will be cycloned to recover the finished product whilst unfinished product will be evenly split between two ball-mill circuits. The four ball-mill circuits will be closed by hydrocyclones. The finished product from all cyclones will gravitate to two surge tanks, via in-stream particle and chemical samples, prior to pumping to the flotation area. Linked to the ball mill circuits will be two gravity gold recovery plants. A proportion of the ball mill discharge will be pumped to the two gravity gold circuits comprising scalping screens and centrifugal gravity concentrators. The centrifugal gravity concentrators will recover the free gold and direct it to a gold plant for upgrading to bullion. Tails from the gravity concentrators will be returned to the milling circuit.

Ore from the several open pits will be treated in a conventional process plant to produce a copper concentrate which will be pumped to the port, filtered and then loaded onto ships destined for world markets. Additionally, a molybdenum concentrate will be produced which will be filtered and bagged in the process plant before containerisation for export.The processing plant design is based upon a conventional sulphide ore flotation circuit to an initial nameplate throughput capacity of 85 Mtpa, expandable to 100 Mtpa capacity.Aside from in-pit primary crushing, the processing plant will include conventional facilities, such as:- crushing (secondary and pebble) and grinding (SAG/ball) to liberate minerals from the ore-froth flotation to separate most of the copper and molybdenum minerals from minerals of no commercial worth- differential flotation to separate the copper and molybdenum minerals from each other- storage of tailings and provision of reclaim water for the process- removal of water from the productsThe process plant is designed to process ore at a head grade of up to 0.65% Cu and 0.023% Mo. These levels are higher than the highest sustained head grades of 0.46% Cu and 88.40 ppm Mo scheduled to be mined in 2023 and 2029, respectively, but the design provides the flexibility to accommodate a wide range of head grades over the Project life.FlotationGround slurry will be directed to a flotation circuit where a bulk sulphide concentrate, containing copper, molybdenum, gold and silver values, will be collected and concentrated in a rougher followed by cleaner flotation. A primary high grade concentrate from the first rougher cell will be collected and cleaned directly in columns to produce a final product. The balance of concentrate from the remainder of the rougher cells will be collected, fed into three regrind mills, and then cleaned in two stages of mechanical cells followed by a one column stage to produce a final bulk concentrate. The rougher and cleaner circuits will be installed to meet ultimate capacity, with no further additions required. The bulk concentrate will be thickened in conventional thickeners (with no flocculant) and pumped to a differential flotation plant, where copper minerals will be depressed, and molybdenite floated into a molybdenum concentrate.Concentrates Copper/gold concentrate piped from the plant site will be filtered, reclaimed using a mechanical reclaimer and loaded by closed conveyors on to bulk ore carriers. The filtrate water will be treated at the port in a water treatment plant or aternatively pumped through a return pipeline to the TMF. The concentrate will be filtered in automatic filter presses and when dry (8% to 9% moisture), will be stored in a covered building with a capacity of 140,000 t. The molybdenum concentrate will be filtered, dried, and packaged in containers for shipment to offshore roasters. Tailings from the molybdenum flotation circuit will constitute the copper concentrate, which will be thickened/pumped/piped approximately 25 km to a filter plant at the Punta Rincn port site. If the molybdenum head grade is unsuitable, the molybdenum separation plant can be readily bypassed.Tailings disposal and process water reclaim For the first approximate fourteen years of the operation, tailings containing silicate, iron sulphide and other minerals from the rougher and cleaning steps will be deposited into the TMF located north of the mine and plant. The TMF is of centre line/downstream construction.The plant is equipped with preparation facilities for all required liquid and solid reagents, including frother, collector, promoter and lime. In addition, a ball charging system is provided in the milling area for feeding balls into the respective mills.

Reserves at December 31, 2020: Mineral Reserve: The actual cut-off grade for the estimate varies due to variable processing recovery, but otherwise reflects a longerterm consensus copper price of $3.00/lb, a molybdenum price of $13.50/lb, a gold price of $1,200/oz and a silver price of $16.00/oz.Mineral Resource: 0.15% Cu cut-off grade.

horizontal grinding mills for mining and minerals processing - metso outotec

horizontal grinding mills for mining and minerals processing - metso outotec

Metso Outotec is advancing an unrivaled innovation legacy by introducing the Premier mills and Select mills. These two product lines are unique, but use Metso Outotec experience and expertise to exceed your operational goals.

Metso Outotec's unmatched expertise ensures delivery of your Premier mill or Select mill based on your operational needs. When choosing your equipment we not only keep in mind mill performance, but also considering how your Premier or Select mill will optimize your minerals processing circuit.

Metso Outotec Premier mills and Select mills make up the industry's widest range of horizontal grinding mills. With our Premier mills and Select mills, no matter your application or needs we will have a solution to help optimize your operation.

Metso Outotec Premier horizontal grinding mills are customized and optimized grinding solutions built on advanced simulation tools and unmatched expertise. A Metso Outotec Premier horizontal grinding mill is able to meet any projects needs, even if it means creating something novel and unseen before.

Metso Outotec Select horizontal grinding mills are a pre-engineered range of class-leading horizontal grinding mills that were selected by utilizing our industry leading experience and expertise. With developing a pre-engineered package, this eliminates a lot of the time and costs usually spent in the engineering and selection stages.

ball mill | ball mills | wet & dry grinding | dove

ball mill | ball mills | wet & dry grinding | dove

DOVE Ball Mills are supplied in a wide variety of capacities and specifications. DOVE small Ball Mills designed for laboratories ball milling process are supplied in 4 models, capacity range of (200g/h-1000 g/h). For small to large scale operations, DOVE Ball Mills are supplied in 17 models, capacity range of (0.3 TPH 80 TPH).

With over 50 years experience in Grinding Mill Machine fabrication, DOVE Ball Mills as critical component of DOVE Crushing plants are designed with highest quality of material for long life and minimum maintenance, to grind ores to 35 mesh or finer.

DOVE Grinding Mills are supplied in a wide range of capacities and specifications, for reliable and effective grinding, size reduction applications and for diverse applications of either dry or wet ore.

DOVE Ball Mills have extended history in the Mining and Mineral Processing Industry, Construction, Solid Waste Processing, Food Processing Industry, Chemical and Biochemical Industry, for Pyrotechnics and Ceramics.

DOVE Ball Mills are designed to operate with various types of grinding media, including Ball Mills Balls. DOVE supply Steel Balls in Various sizes and specifications. Cast Iron steel Balls, Forged grinding steel balls, High Chrome cast steel bars, with hardness of 60-68 HRC. We also supply Grinding Cylpebs with surface hard ness of 60-68 HRC, and grinding Rod with surface hardness of 55-60 HRC.

DOVE Ball Mills are made of high grade cast and carbon steel for extra strength, long and trouble-free operations. The inner lining plate designed with high manganese steel for long life and minimum wear off.

DOVE Ball Mill can be integrated in a Complete Plant designed by DOVE Engineering Services, provided for our Clients application and supplied with all components of the plant for efficient processing, smooth operation and efficient integration with the balance of the Processing Plant.

DOVE Ball mills, also known as Grinding mill, Mining mill, Pebble mill, Ball & Pebble mill, is an important machinery in the mining and various other industries, which would require grinding different material.

They are highly efficient Grinding mill machines, designed for grinding applications, where fine material is required. DOVE Ball Mills are used in supplied and applicable for wet and dry grinding applications within the following branches of industries:

DOVE ball mills is a rotating horizontal cylinder that tumbles the material to grind with a certain media. The standard media that we use in our ball milling process are the steel grinding balls, however depending on the specific application, we can configure the grinding mill with different media.

DOVE supplies various types and sizes of Ball Mill Balls, including; Cast Iron steel Balls, Forged grinding steel balls, High Chrome cast steel bars, with surface hardness of 60-68 HRC. DOVE Ball Mills achieves size reduction by impact and attrition. When the cylinder rotates, the balls are dragged to almost the top of the shell, and from there, they fall unto the material, which lead to the material breaking due to the impact.

DOVE Ball Mills are used in hard rock mineral processing plants as an ore-dressing step to grind the rocks into fine powder size, liberating the mineral particles from the rocks. This will ensure that the ore is well prepared for the next stage of processing and optimize the recovery of the minerals.

DOVE ball mill is integrated and used in DOVE Portable and Semi-Stationary Hard Rock plants (Hard Rock processing plants) to efficiently grind the ore from primary deposit until the liberation size of valuable minerals is reached. DOVE ball mill is the key grinding equipment after material is crushed. It is used to grind and blend bulk material into powder form using different sized balls. The working principle is simple, impact and attrition size reduction take place as the ball drops from near the top of the rotating hollow cylindrical shell of the Ball Mill. The output materials will be feed to the processing and recovery machines.

DOVE Ball Mills are deigned for either wet or dry grinding of materials, in various models, and in accordance to the processing and the crushing plant design, to cater to the liberation size of the minerals and the hardness of the ore.

DOVE supplies two different kinds of ball mills Grate type, and Overfall type. The difference between the two type is according to their ways of discharging material, and the plant flow design specifications.

The Grinding Balls will grind the material into powder size of 20 to 75 micron. In mining operations, this will allow for the liberation of gold and other precious metals that are hosted by the rocks. Many types of grinding media are suitable for use in a ball mill, each material having its own specific properties, specification and advantages.

Media Size: The grinding media particles should be substantially larger than the largest pieces of final material after grinding. The smaller the media particles, the smaller the particle size of the final product.

Composition: Each ball mill application has different requirements. Some of these requirements are relates to the grinding media being in the finished product, while others are based on how the media will react with the material being milled. Therefor, grinding media selection plays major factor on the final milled product.

Contamination: In certain grinding mill process, low contamination is important, the grinding media may be selected for ease of separation from the finished product, for example steel dust produced from steel balls can be magnetically separated from non-ferrous products. An alternative to separation is to use media of the same material as the product being milled.

Corrosive:Certain type of media, such as steel balls, may react with corrosive materials. For this reason, stainless steel balls, or ceramic balls, and flint grinding media may each be used when corrosive substances are present during grinding.

major mines & projects | north mara mine

major mines & projects | north mara mine

The North Mara Mine is situated within the Mara Greenstone Belt. The underlying geology comprises felsic and mafic volcanics intercalated with sediments which are intruded by various granitoid and gabbroic plutonic rocks. Tertiary volcanic lava flows partially cover the underlying Archaean geology and the ore bodies are structurally controlled, shear-hosted lode gold deposits. There are several types of gold mineralisation including shear-zone-related quartz vein and disseminated gold.

The North Mara mine is currently an underground operation (Gokona). The North Mara transitioned to underground mining during 2020 and significant improvements made to improve costs and operational effectiveness.At Gokona, Acacia utilizes an existing exploration decline for initial access to the planned underground mine. Two major declines are included in the mine plan. The mining method utilised in the operation is Long Hole Open Stoping (LHOS) with Cemented Aggregate Fill (CAF).

The ore is hauled in 80 tonne dump trucks up to the Run of Mine (ROM) pad at Nyabirama. The ore is drawn out of the ROM bin and fed onto a vibrating grizzly screen by means of an apron feeder. The undersize material passes through the grizzly onto a conveyor belt while the oversize material passes through a jaw crusher which discharges onto the same conveyor belt. The ore is fed onto a banana screen via a two tier conveyor system. The undersize from the banana screen passes onto a conveyor belt which feeds the SAG (Semi-Autogenous Grinding) mill feed stockpile while the oversize material is fed into a secondary cone crusher. The crushed ore from the secondary stockpile is tipped onto the SAG feed stockpile.The ore is drawn from underneath the SAG mill feed stockpile onto the SAG mill feed conveyor belt by means of three vibrating feeders. It is fed into the SAG mill for primary grinding. The SAG mill discharge is pumped to a cluster of twelve cyclones for classification. The cyclone overflow is fed to two trash screens whilst the underflow reports to a scalping screen prior to gravity concentration. Screen overflow is recombined with gravity circuit tails and reports to 2 ball mills in closed circuit with the classification cyclones.

Gravity separationACACIA reactorCarbon re-activation kilnConcentrate leachAgitated tank (VAT) leachingCounter current decantation (CCD)Carbon in leach (CIL)AARL elutionSolvent Extraction & ElectrowinningCyanide (reagent)

Both oxide and sulphide reserves are mined and processed by conventional carbon-in-leach (CIL) technology. The concentrate from the Knelson Concentrators is fed to the Acacia reactor in the gold room for gold recovery by intensive cyanidation. Acacia tailings are returned to the ball mill circuit and pregnant solution is pumped to electrowinning cells.The trash screen overflow falls into a bunker whilst the underflow is fed to two thickeners. Thickened slurry is pumped to the CIL circuit and water recovered from the thickeners is pumped back to the mill circuit as process water. The CIL circuit consists of three pre-leach tanks and nine adsorption tanks. Carbon is transferred counter current to slurry flow by means of air lifts and is pumped from Tank 4 over the loaded carbon screen before being transferred to the acid wash section.Residue from the CIL section is pumped to a cyanide detoxification circuit where Weak Acid Dissociable (WAD) cyanide con ........

major mines & projects | dome mountain project

major mines & projects | dome mountain project

The mineral deposits at Dome Mountain are structure-controlled orogenic (mesothermal) quartz-carbonate-sulphide veins with associated gold and silver mineralization. Controlling structures are east-west and northwest southeast trending brittle fault zones that dip moderately to steeply south and southwest. The host rocks are Lower to Middle Jurassic subaerial volcanic flows, pyroclastic, and related volcanoclastic rocks.The most significant gold mineralization on the Dome Mountain Project is contained within five zones of the past-producing Boulder Vein System (listed in order of importance):- Boulder Main Vein: This zone has a strike ranging from 090 to 100 and dips ranging from 45 to 70 south. The vein has been defined over a strike length of 440 metres from section 652,800 UTME to 653,240 UTME and a down-dip extent of more than 300 metres starting at the surface. The mineralized zone within the vein has a shallow easterly plunge with an average horizontal width of 2.4 metres, ranging from less than a meter to 21.2 metres. The majority of the 43,900 tonnes of past production came from this zone.- Argillite Vein: The Argillite Vein is a splay off the Boulder Main Vein. It strikes at 120 and dips to the southwest at angles ranging from 35 to 50 and it appears to flatten along strike to the southeast. The zone is somewhat discontinuous over the defined strike length of 240 metres and a maximum down-dip extent of 90 metres. The mineralized zone in the vein has an average horizontal thickness of 3.2 metres, ranging from less than a meter to 8.0 metres.- Boulder Footwall Vein: This zone is sub-parallel to the Boulder Main Vein and is located at the east end of the Boulder Vein System. It has been defined by drilling over a strike length of 550 metres from 653,300 UTME to 653,850 UTME and over a down-dip extent of approximately 200 metres. The zone has an average horizontal width of 1.9 metres, ranging from less than a meter to 15.4 metres. The zone is open down-plunge to the east and down-dip. Minor past-production came from this zone.- Boulder West Hangingwall Vein: This vein is also sub-parallel to the Boulder Main Vein. It is a somewhat discontinuous vein with an overall strike length of 100 metres located between 652,960 UTME and 653,060 UTME and a defined down-dip extent of approximately 100 metres. It has an average horizontal width of about 2.4 metres, ranging from 1.8 to 3.8 metres.x Boulder East Hangingwall Vein: This is a thin and somewhat discontinuous vein that occurs over a strike length of about 320 metres at the east end of and sub-parallel to the Boulder Main Vein. In addition to the past producing Boulder Vein System, gold mineralization at the Dome Mountain Project is present at twelve separate locations: Free Gold, Forks, 9800, Ptarmigan, Elk, Eagle, Gem, Raven, Hawk, Chance, Hoopes, Jane, Cabin, and Pioneer. The Free Gold and Forks zones are classified as pastproducers by the B.C. Government Minefile database while the others are listed as either prospects or showings. The Cabin Vein is considered to be the westward extension of the Boulder Vein.The veins occur in a roughly northwest-southeast 12-kilometer trend from southeast of Dome Mountain to Mt. McKendrick. This trend may reflect the presence of a deep-seated structure. A modest amount of diamond drilling has been conducted on the various veins but to date no minerals resources have been defined.

The Dome Mountain deposit is a system of structure-controlled orogenic (mesothermal) quartz-carbonate-sulphide veins with associated gold and silver mineralization. The mining method, mechanized ramp cut and fill, is contemplated being utilized at the Dome Mountain Mine to maximize recovery of the mineral resource. The mechanized cut and fill method optimizes mineral resource extraction since this method allows for the ability to follow irregular mineralized zones quite precisely and allow greater selectivity in mining and results in a higher-grade mineralized product. Recovery for this method was planned at 95% and dilution was estimated at less than 10%. Other mining methods that could be proposed in the future may include narrow vein long hole stopes in areas where the mineralized zone is dipping at more than 45 degrees, captive slusher stopes, shrinkage stopes, or resue mining to minimize dilution where the ore zone is too narrow. Unconsolidated rock backfill is planned to be used in all mechanized ramp cut and fill stopes after mining is completed to stabilize the ground and to provide a working platform for the next cut and fill lift (stope). This backfill is the development waste from the Dome Mountain Mine. This will reduce the overall closure costs for the operation. It is planned to carry out geotechnical studies in the future to determine if cemented rock fill (CRF) is an option for backfill. This is also depended on future permitting requirements. Cut and fill stoping includes methods in which a single excavation pass, or a lift is completed and backfilled before another cut is made. The initial horizontal ore drifts are mined 3.0 meters in height and are mined advancing away from the stope access point with the subsequent horizontal cuts being mined 2.4 meters in height. The excavated mineral resource falls and rests on the backfill placed during the previous cut and fill cycle. As cut and fill cycles are completed, the stope is advanced upward. This means that the vein must be developed from the bottom. For the purposes of this study, a production rate of 100 tonnes per day was utilized.Cut and fill accesses were designed off the 1312 elevation, 1330 elevation, 1348 elevation and 1358 elevation, and a short decline off the 1370 level. Production mining is currently in progress off the 1290 level. The accesses are designed at a size of 3.4 meters wide by 4 meters high at a maximum decline or incline of 15% off the ramp.A transition zone from +15% to level over 3 rounds was designed for each access to allow a flat area for the transition of equipment from the ramp to the access and allow a safe area for the loading of trucks.The accesses were designed to provide a maximum of 5 cut and fill stopes from each access with a 3 to 4.5 meter pillar between the top cut of one access and the bottom cut of the next access up the ramp being mined as a back-stope. Accesses were designed to be breasted down after the completion of each cut with the waste remaining in the access for fill as a platform to work the next cut. Transitions were designed at the top of the ramp from level to -15%, and again prior to intersecting the Boulder Vein to allow equipment a safe transition zone. A small cut-out was completed near the transition to -15% to allow utility holes to be installed from level to level.A small decline from the 1370 level will be mined to access an area of mineralization on the west side of ramp area that cannot be accessed from the 1348 access.The stopes will be filled with waste development muck. There will not be any processing of the development waste prior to backfilling. Typically, a minus 305 mm sizing of the waste material is preferred to optimize compacting of the fill, but most waste fill can be placed without special sizing gradation and still provide adequate wall support and working surface. However as mentioned earlier it is planned to carry out geotechnical studies in the future to determine if cemented rock fill (CRF) is an option for backfill.The waste fill will be placed in the stope using a load-haul-dump (LHD) machine. The LHD will dump the load and push the material into place from the stope entrance to the end of the stope. Tight filling to the back of the stope is not required. Compacting of fill material will occur during the breasting operation of the next cut and fill lift. The compacting of the backfill will occur automatically as the mining equipment (jumbo and LHD) are operating on the backfill material.Development for the mine is limited to excavation required to establish and maintain operations at an average production rate of 100 tonnes per day. The mine is accessed via the existing 1290 and 1370 levels. The 1370 level has been designated as the fresh air intake and the 1290 level has been designated the main haulage way and will provide the exhaust pathway for the ventilation system. A ramp and a ventilation raise will be excavated between the 1290 and 1370 levels to allow access to the cut and fill stopes and to provide fresh, clean air to the working headings.

Milling will be performed by a third party, Nicola Mining. The ore was crushed to minus 3/8 inches and ground in a 6.5 ft x 10 ft ball mill. The average grind of the ore was 90 microns or 75% minus 200 mesh.

Dome Mountain mineralized material will be trucked and processed at an offsite mill owned by Nicola Mining Inc. located in Merritt, B.C. Mill recoveries were based on a scoping level metallurgical program which was conducted on muck samples from Dome Mountain Mine in 2010 and a test run of 6,690 tonnes of material that was run through the Nicola mill in 2016 at a grade of 8.75 g/t, with a 95.2% gold recovery. The processing of ore involved crushing, grinding, conditioning, rougher, scavenger and cleaning flotation and filtering of the flotation concentrate. The ore was conditioned with reagents and floated. The rougher flotation concentrate was cleaned to produce a cleaner concentrate. The recovery in the second batch of ore was higher than the first batch primarily due to additional reagents added to the scavenger cells. The average flotation time in the mill was 88 minutes at 4 tonnes/hour. The cleaner concentrates were shipped to a smelter in China.

ball mill for sale | grinding machine - jxsc mining

ball mill for sale | grinding machine - jxsc mining

Ball mill is the key equipment for grinding materials. those grinding mills are widely used in the mining process, and it has a wide range of usage in grinding mineral or material into fine powder, such as gold, ironzinc ore, copper, etc.

JXSC Mining produce reliable effective ball mill for long life and minimum maintenance, incorporate many of the qualities which have made us being professional in the mineral processing industry since 1985. Various types of ball mill designs are available to suit different applications. These could include but not be restricted to coal mining grate discharge, dry type grinding, wet mineral grinding, high-temperature milling operations, stone & pebble milling.

A ball mill grinds ores to an end product size of thirty-five mesh or finer. The feeding material to a ball mill is treated by: Single or multistage crushing and screening Crushing, screening, and/or rod milling Primary crushing and autogenous/semi-autogenous grinding.

Normal feed sizes: eighty percent of six millimeters or finer for hard rocker eighty percent of twenty-five millimeters or finer for fragile rocks (Larger feed sizes can be tolerated depending on the requirements).

The ratio of machine length to the cylinder diameter of cylindrical type ball mills range from one to three through three to one. When the length to diameter ratio is two to one or even bigger, we should better choose the mill of a Tube Mill.

Grinding circuit design Grinding circuit design is available, we experienced engineers expect the chance to help you with ore material grinding mill plant of grinding circuit design, installation, operation, and optimization. The automatic operation has the advantage of saving energy consumption, grinding media, and reducing body liner wear while increasing grinding capacity. In addition, by using a software system to control the ore grinding process meet the requirements of different ore milling task.

The ball mill is a typical material grinder machine which widely used in the mineral processing plant, ball mill performs well in different material conditions either wet type grinding or dry type, and to grind the ores to a fine size.

Main ball mill components: cylinder, motor drive, grinding medium, shaft. The cylinder cavity is partial filling with the material to be ground and the metal grinding balls. When the large cylinder rotating and creating centrifugal force, the inner metal grinding mediums will be lifted to the predetermined height and then fall, the rock material will be ground under the gravity force and squeeze force of moving mediums. Feed material to be ground enters the cylinder through a hopper feeder on one end and after being crushed by the grinding medium is discharged at the other end.

Mining Equipment Manufacturers, Our Main Products: Gold Trommel, Gold Wash Plant, Dense Media Separation System, CIP, CIL, Ball Mill, Trommel Scrubber, Shaker Table, Jig Concentrator, Spiral Separator, Slurry Pump, Trommel Screen.

ball mill used in minerals processing plant | prominer (shanghai) mining technology co.,ltd

ball mill used in minerals processing plant | prominer (shanghai) mining technology co.,ltd

This ball mill is typically designed to grind mineral ores and other materials with different hardness, and it is widely used in different fields, such as ore dressing, building material field, chemical industry, etc. Due to the difference of its slurry discharging method, it is divided to two types: grid type ball mill and overflow type ball mill.

Compared with grid type ball mill, overflow type ball mill can grind materials finer even though its grinding time is usually longer. So it can make finer particle products. Hence the grid type ball mill is mainly used for primary stage of grinding while overflow type ball mill is mainly used for the secondary grinding.

Ball mill Advantages: 1Jack-up device, easy maintenance; 2The hydrostatic and hydrodynamic bearings ensure the smooth operation; 3Low speed transmission is easy for starting and maintenance; 4The oil-mist lubrication device guarantees reliable performance of bearings; 5The air clutch adopts the flexible start-up model./5According to the customer demand, manganese steel liner and wear-resistant rubber liner can be customized with good wear resistance, long service life and easy maintenance.

The grinding system uses either 'open circuit' or 'closed circuit'. In an open circuit system, the feed rate of materials is adjusted to achieve the desired fineness of the product. In a closed circuit system, coarse particles are separated from the finer ones and sent back for further grinding.

Prominer has been devoted to mineral processing industry for decades and specializes in mineral upgrading and deep processing. With expertise in the fields of mineral project development, mining, test study, engineering, technological processing.

stainless steel grinding balls for mining / ball mill

stainless steel grinding balls for mining / ball mill

2021 RGPBALLS S.r.l. 20092 Cinisello Balsamo (MI) - Italy P.I. / C.F. / Reg. Impr. 08678490965 N. REA: MI-2042305 Cap. soc. 500.000 int. vers. Privacy Policy Cookie Policy

Grinding balls for mining are made from various metals such as steel, hard metal and ceramic. However, they are commonly manufactured from steel and steel alloys which have superior resistance to abrasion and low wear rates. Hardness might be between 15 and 66 on the Rockwell Scale or between 85 to 105 on the Vickers hardness scale for certain steel alloy grinding balls. These hard-wearing balls are available in almost any size from 0.5 to 76.2 mm in diameter.

Grinding balls for ball mill use are used in many areas of mining and industry to pulverise and grind. Grinding ballsfor mining are generally used to break down secondary materials such as rock, cement and stone during the extraction of ores and metals. AISI steel grinding balls for ball mill applications typically have a tolerance of 0.05/0.10 and a density of 7.70 to 7.95. Exceptions include Al series 1XXX and Al 6061 which have the same tolerance but a density of 2.71 and 2.70 respectively and TCK 20/TCK 30 balls with a higher density of 14.85.

citic-heavy industries co. ltd

citic-heavy industries co. ltd

CITIC HIC concentrates on improving its overall competitive strength, and will promote its growth by fast tracking development to aid its entry into the Global Manufacturing Industry. CITIC HIC is quickly developing into a world manufacturing base, built on a platform of global economic integration and cooperation ... ...

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