The data recorded by Statistics in 2020 shows that although in 2019 manganese ore price fell to the bottom, the price in 2020 still gets increased to 4.5 U.S. dollars per metric ton unit CIF even under the impact of COVID-19. Manganese ore prices are forecast to remain at global prices by 2020 over the next two years, which is good news to manganese ore suppliers.
Besides, Justin Brown, managing director of Element 25said Manganese has the traditional end uses in steel, and that market is fairly stable". As people's demand for laptops and electric cars increases, the output of lithium batteries has also soared, and the most important element in lithium batteries is manganese.
Manganese ore after the beneficiation process is applied in many respects in our daily lives. Of annual manganese ore production, 90 percent is used in steelmaking, and the other 10 percent is used respectively in non-ferrous metallurgy, chemical industry, electronics, battery, agriculture, etc.
In the metallurgical industry, manganese ore is mostly used for manganese-forming ferroalloys and manganese metal. The former is used as deoxidizers or alloying element additives for steelmaking, and the latter is used to smelt certain special alloy steels and non-ferrous metal alloys. Manganese ore can also be used directly as an ingredient in steelmaking and ironmaking.
When smelting manganese-based iron alloys, the useful elements in manganese ore are manganese and iron. The level of manganese is the main indicator for measuring the quality of manganese ore. The iron content is required to have a certain ratio with the amount of manganese.
Phosphorus is the most harmful element in manganese ore. The phosphorus in steel reduces the impact of toughness. Although sulfur is also a harmful element, it has a better desulfurization effect during smelting, and sulfur is volatilized into sulfur dioxide or enters the slag in the form of calcium sulfide or manganese sulfide.
Applications in Metallurgy Manganese content (%) Ferromanganese (%) Phosphorus manganese (%) Low carbon ferromanganese 36%40% 68.5 0.0020.0036 Carbon Ferro Manganese 33%40% 3.87.8 0.0020.005 Manganese Silicon Alloy 29%35% 3.37.5 0.00160.0048 Blast Furnace Ferromanganese 30% 27 0.005
In the chemical industry, manganese ore is mainly used to prepare manganese dioxide, manganese sulfate, and potassium permanganate. It is also used to make manganese carbonate, manganese nitrate and manganese chloride.
Since most manganese ore is a fine-grained or fine-grained inlay, and there are a considerable number of high-phosphorus ore, high-iron ore, and symbiotic beneficial metals, it is very difficult to beneficiate.
At present, commonly used manganese ore beneficiation methods include physical beneficiation (washing and screening, gravity separation, strong magnetic separation, flotation separation, joint beneficiation), chemical beneficiation (leaching method) and fire enrichment, etc.
Washing is the use of hydraulic washing or additional mechanical scrubbing to separate the ore from the mud. Commonly used equipment includes washing sieves, cylinder washing machines and trough ore-washing machine.
The washing operation is often accompanied by screening, such as direct flushing on the vibrating screen or sifting the ore (clean ore) obtained by the washing machine to the vibrating screen. Screening is used as an independent operation to separate products of different sizes and grades for various purposes.
At present, the gravity separation is only used to beneficiate manganese ore with simple structure and coarse grain size and is especially suitable for manganese oxide ore with high density. Common methods include heavy media separation, jigging and tabling dressing.
It is essential to recover as much manganese as possible in the gravity concentration zone because its grinding cost is much lower than the manganese in the flotation process, and simple operations are more active.
Because of the simple operation, easy control and strong adaptability of magnetic separation can be used for dressing various manganese ore, and it has dominated the manganese ore dressing in recent years.
Gravity-magnetic separation plant of manganese ore mainly deals with leaching manganese oxide ore, using the jig to treat 30~3 mm of cleaned ore can obtain high-quality manganese-containing more than 40% of manganese. And then can be used as manganese powder of battery raw material.
The jigging tailings and less than 3 mm washed ore are ground to less than 1mm, and then being processed by strong magnetic separator. The manganese concentrate grade would be increased by 24% to 25%, and reaches to 36% to 40%.
Adopting strong magnetic-flotation desulfurization can directly obtain the integrated manganese concentrate product; the use of petroleum sodium sulfonate instead of oxidized paraffin soap as a collector can make the pulp be sorted at neutral and normal temperature, thus saving reagent consumption and energy consumption.
The enrichment of manganese ore by fire is another dressing method for high-phosphorus and high-iron manganese ore which is difficult to select. It is generally called the manganese-rich slag method.
The manganese-rich slag generally contains 35% to 45% Mn, Mn/Fe 12-38, P/Mn<0.002, and is a high-quality raw material to manganese-based alloy. Therefore, fire enrichment is also a promising method for mineral processing for low-manganese with high-phosphorus and high-iron.
Manganese ore also can be recovered by acid leaching for production of battery grade manganese dioxide for low-manganese ores. Leaching of manganese ore was carried out with diluted sulphuric acid in the presence of pyrite in the temperature range from 323 to 363 K.
After processed by hydraulic cone crusher, the smaller-sized manganese ore would be fed to grinding machine- ball mill. It can grind the ore to a relatively fine and uniform particle size, which lays a foundation for further magnetic separation of manganese ore.
It is indispensable grading equipment in the manganese ore beneficiation plant. Because by taking advantage of the natural settling characteristics of ore, a spiral classifier can effectively classify and separate the manganese ore size to help control the amount of grinding required.
The flexibility of flotation is relatively high. You can choose different reagents according to the type and grade of the ore. Although the entire process of froth flotation is expensive, it can extract higher-grade manganese ore.
The magnetic separator is a highly targeted magnetic separation device specially developed for the properties of manganese ore. The device not only has the advantages of small size, lightweight, high automation, simple and reasonable structure, but also has high magnetic separation efficiency and high output.
If you want to beneficiate high-grade manganese ore and maximize the value of manganese concentration, Fote Company is an ore beneficiation equipment manufacturer with more that 35-years designing and manufacturing experience and can give you the most professional advice and offer you all machines needed in the ore beneficiation plant (form crushing stage to ore dressing stage). All machines are tailored to your project requirements.
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a complete ore beneficiation production line consists of a vibrating feeder, a crusher, a vibrating screen, a ball mill, a dryer, a concentrator, a magnetic separator or flotation machine and a spiral classifier.
The preparation usually consists of two stages: crushing and mineral grading. In order to separate useful minerals from ore, the ore should firstly be crushed. Sometimes in order to meet the requirements of the material size of the subsequent work, it is necessary to add a certain crushing operation.
The ore will be sorted after being crushed and the useful minerals and gangue are selected, or the various useful minerals are separated from each other, which is the main part of the beneficiation. The ore dressing methods include magnetic separation, gravity separation, froth flotation, electrification, and chemical separation.
Magnetic separation is perfomed in an inhomogeneous magnetic field using the difference in magnetic properties of the mineral particles. Those minerals with strong magnetism are selected by the magnetic separator with weak magnetic field, such as magnetite and pyrrhotite; whereas those with weak magnetism are sorted by that with strong magnetic field, such as hematite, siderite, ilmenite and wolframite.
The froth flotation is an essential concentration process. In this process, several kinds of particles are separated by the surface chemistry of the particles. Additionally, it can handle materials whose size is less than 0.2 to 0.3 mm and it can also be used to select intermediate products in metallurgy as well as ions, treat wastewater. As is manifested in statistics, more than 90% of non-ferrous metal is separated in a flotation separation process.
Gravity separation refers to the sorting operation based on the specific gravity of the mineral raw material particles. Gravity separation is the main processing method for selecting black tungsten ore, cassiterite, gold, coarse iron and manganese ore; and it is also widely used for rare metal ore. This method tends to cut much cost and cause little environmental pollution.
Since most of mineral processing products are wet, it is necessary to remove the moisture from the mineral processing products before smelting. Dewatering operations are often carried out by means of concentration, filtration and drying.
Concentration is the action of gravity or centrifugal force to precipitate solid particles in the beneficiation product to remove part of the water, which is usually carried out in a concentrator.
Drying, the final stage of dehydration, refers to the reducing of moisture according to the principle of heating and evaporation. However, it is only used when the dehydrated concentrate needs to be dried. This operation is generally carried out in a dryer.
The materials are firstly sent into the crusher for primary crushing through the vibrating feeder, and then into the ball mill for further grinding. After that, the crushed materials are into the spiral classifier for washing and grading. The flotation cell or the magnetic separator will further process them for ore separation. The concentrator and rotary dryer are finally used for drying and dewatering and the materials that come out of the concentrator are the valuable minerals. Additionally, the two mentioned machines are optional and you can make a decision relied on your actual needs.
Manganese is widely distributed in nature, and almost all kinds of ores and silicate rocks contain manganese. In modern industry, manganese and its compounds are widely used in various economic fields, of which the iron and steel industry is one of the most important fields. The amount of manganese used is as high as 90%-95%, which is mainly used as a deoxidizer and desulfurizer for iron and steelmaking.
Manganese oxide oreManganese oxide ore is mainly composed of secondary manganese oxide ore of weathered deposits, in addition to some primary and secondary manganese oxide ore of sedimentary and hydrothermal deposits. The manganese minerals in the manganese oxide ore are mainly dolomite, pyrolusite and hydromanganese ore; the gangue minerals are mainly silicate and carbonate minerals, often accompanied by iron, phosphorus and nickel, cobalt and other components.
Manganese carbonate oreThe manganese minerals in sedimentary manganese carbonate ore mainly include rhodochrosite, calcium rhodochrosite, manganese-containing calcite and rhodochrosite; gangue minerals include silicate and carbonate minerals, often accompanied by impurities such as sulfur and iron. The ore is generally more complex, and the particle size of the manganese mineral inlay is as fine as micrometers, which is not easy to dissociate, and it is often difficult to obtain a higher concentrate grade.
Because most manganese ores are fine-grained or fine-grained, and there are a considerable number of high-phosphorus ores, high-iron ores and symbiotic (associated) beneficial metals, it is very difficult to classify. At present, the commonly used manganese ore beneficiation methods include physical beneficiation (washing and screening method, gravity separation method, strong magnetic separation method, flotation method, combined beneficiation method), chemical beneficiation (leaching method) and special beneficiation (fire method enrichment method) ).
Ore washing mainly uses mechanical scrubbing machine to separate the ore from the mud. Commonly used equipment includes ore washing sieve, cylindrical ore washing machine and trough ore washing machine. Usually, the ore washing operation is accompanied by the sieving operation. Directly flush the water on the vibrating screen or send the ore (net ore) obtained by the ore washing machine to the vibrating screen for screening. Screening can be used as an independent part to separate products of different particle sizes and grades for different uses.
At present, the gravity separation method is only suitable for sorting manganese ore with a simple structure and coarser particle size, especially manganese oxide ore with a higher density. Commonly used gravity separation methods include heavy-medium beneficiation, jig beneficiation and shaker beneficiation.The beneficiation process of manganese oxide ore is generally to crush the ore to 6-0mm or 10-0mm, and then to classify, coarse grade particles are sent to jig sorting, and fine grade particles are sent to shaker for sorting.
Manganese minerals are weak magnetic minerals (specific magnetization coefficient X=1010-6~60010-6cm3/g), can be effectively recovered in a strong magnetic field magnetic separator with a magnetic field strength of Ho=800-1600kA/m (10000-20000oe), and the grade of manganese can generally be increased by 4-10%.Because the magnetic separation method has the characteristics of simple operation, easy control, and strong adaptability, it is widely used in the selection of various manganese ores, and various new coarse, medium, and fine-grained strong magnetic machines have also been successfully developed.
The strong magnetic-flotation method has good adaptability. The strong magnetic separator not only effectively removes the slime, but also improves the selection grade of flotation. Strong magnetic-flotation desulfurization can directly obtain comprehensive manganese concentrate products.Sodium petroleum sulfonate instead of oxidized paraffin soap as collector can make the ore pulp sort at neutral and normal temperature, saving medicine consumption and energy consumption.
Generally, manganese ore leaching methods include direct leaching, roasting leaching and biological leaching. Among them, the direct leaching method includes the hydrosulfite method, sulfur dioxide method, ferrous sulfate method and so on.Taking the leaching method of sulfur dioxide for manganese as an example, the manganese ore is slurried, and sulfur dioxide gas is introduced, and the manganese oxide in the ore is converted into MnSO4 and MnS2O6. Lime milk is added to the filtrate to produce manganese hydroxide precipitation, and solid manganese hydroxide is obtained after filtration. This method is suitable for processing low-grade, inlaid fine-grained manganese oxide ores.
The above are common manganese ore beneficiation methods. In actual production, most of the manganese carbonate ore beneficiation methods use strong magnetic separation, heavy medium beneficiation method and flotation method.The manganese oxide ore is mainly adopts gravity separation method, and the ore washing-heavy separation-reduction roasting-magnetic separation-heavy separation process flow is mostly used. Of course, it is often necessary to combine two or more beneficiation methods for refractory manganese ore.
The earliest countries in the world to use manganese minerals are Egypt, ancient Rome, India and China. The discovery of Manganese, however, came much later, when it was discovered by Swedish mineralogist G. Gahn reduced manganese from pyrolusite in 1774. South Africa, Ukraine, Australia, Brazil and India are the largest reserves of manganese. Manganese mineral application Manganese products include metallurgical manganese ore, manganese carbonate ore powder, chemical industry use and battery use manganese dioxide ore powder. The metallurgical, light industrial and chemical sectors that use manganese ore products have different quality requirements for manganese ore products according to different uses.
Manganese ore distribution The distribution of manganese ore in the world is not only uneven, but also the grade of manganese ore varies greatly in different areas. Manganese-rich ore resources are mainly concentrated in South Africa, Gabon, Brazil and Australia. For example, the Kalahari mine in South Africa has a manganese ore grade of 30-50 percent, the Groote Eylandt mine in Australia has a manganese ore grade of 40-50 percent, and India, Kazakhstan and Mexico are medium-grade manganese resource countries. The low-grade manganese, about 35%-40 %, mainly in Ukraine, China and Ghana, it needs to be beneficiated and artificially enriched before it can be sold as a commodity ore (grade more than 35%).
Because most of the manganese ores are distributed in fine or micro-fine particles, and there are quite a lot of high-phosphorus ore, high-iron ore, and associated metals, so it is quite difficult for manganese mineral processing. At present, the common beneficiation methods of manganese ore are mechanical separation (including ore washing, screening, gravity separation, strong magnetic separation, and flotation), pyro-concentration, chemical separation and so on.
Ore Washing is the use of hydraulic washing or additional mechanical scrubbing to separate the ore from the mud. Common Equipment ore washing screen, drum washing trommel machine and trough ore washer. Washing operations are often accompanied by screening, such as washing directly on the vibrating screen or sending the ore obtained by the washing machine to the vibrating screen. Screening can be used as an independent operation to separate products of different granularity and grade for different purposes.
At present, gravity separation is only used to separate manganese ore with simple structure and coarse particle size, especially for manganese oxide ore with high density. The common methods are heavy medium dressing, jigging dressing and shaking table dressing. The technological process of dealing with manganese oxide ore is generally crushing the ore to 6 ~ 0 mm or 10 ~ 0 mm, then classification, jigging at the coarse level and shaking at the fine level. The gravity separation equipment is mostly Haz reciprocating mineral jig and 6-S type shaking table.
Manganese minerals are weak magnetic minerals, which can be recovered from high magnetic field separators with magnetic field strength Ho 800 ~ 1600KA / M (10000 ~ 20000oe), generally increasing manganese grade by 4% ~ 10 %. Because of its simple operation, easy control and strong adaptability, magnetic separation is widely used to separate all kinds of manganese ores. Various new types of coarse, medium and fine grain strong magnetic machines have been developed successively. At present, the most common application is medium-grain high-intensity magnetic separators, coarse-grain and fine-grain high-intensity magnetic separators followed, fine-grain high-intensity magnetic separators are still in the experimental stage.
Take the Liancheng manganese processing plant as an example, it mainly deals with leaching type manganese oxide ore, using AM-30 jig machine treat 30 ~ 3 mm cleaning ore, can obtain high-quality manganese concentrate containing more than 40% manganese mineral. The grade of manganese concentrate should be increased by 24% ~ 25% to 36% ~ 40% after the jigging tailings and washed ores with diameters less than 3mm are ground to less than 1m and separated by high-intensity magnetic separator.
Zunyi manganese mine adopts high intensity magnetic flotation separation technology, it mainly processes with manganese carbonate ore with low content of manganese, low content of phosphorus, and high content of iron. Ore grinding machine has rod mill and ball mill, all in wet type grinding machines, combines with the SHP-2000 type strong magnetic separation machine and CHF pneumatic flotation machines. After many years of production test, it turns out that the magnetic flotation separation processing method is suitable for manganese ore dressing application.
Pyrometallurgical beneficiation of manganese ore is a kind of ore dressing method for treating high-phosphorus and high-iron poor manganese ore. Its working principle is that selective separate manganese, phosphorus, iron by controlling the furnace temperature.
The pyrometallurgical enrichment process is simple and stable, which can effectively separate iron and phosphorus from ore and obtain enrich manganese slag with a high content of manganese, low content of iron, and low content of phosphorus. This manganese-rich slag generally contains 35% ~ 45% MN, Mn/Fe ratio 1238P/Mn<0.002, it is a kind of high-quality manganese alloy raw material, and it is difficult for the natural manganese ore to reach the above 3 indexes at the same time. Therefore, pyrometallurgical enrichment is a promising mineral processing method for refractory ores with high phosphorus, high iron and low manganese content.
Mainly have the vibrating feeder, PE coarse jaw crusher, PEX fine jaw crusher, vibrating screen, bin, pendulum feeder, electro-vibrating feeder, ball mill, spiral classifier, high-frequency screen, mixing tank, flotation machine, concentrator, filter press, filter separator, dryer and so on.
These mining machines also suited for Beneficiation of weakly magnetic minerals, such as hematite, limonite, ilmenite, wolframite, tantalum-niobium, etc. Non-metallic mineral iron removal and purification, such as quartz, feldspar, nepheline, fluorite, sillimanite, lithium, kaolinite and so on. JXSC Machine, mining machines supplier and ore solutions designer, established in 1985.
Manganese is a common metal mineral in nature. There are more than 150 kinds of manganese minerals found in nature so far, but only a small part of manganese ores with mining and utilization value are mainly pyrolusite, pyrolusite, biogas manganese ore, etc. According to the different processing methods, manganese ore can be roughly divided into five categories: manganese oxide ore, carbonate manganese ore, iron manganese ore, manganese iron ore and multi metal composite manganese ore. Due to the different types of ore deposits and ore properties, various manganese ore dressing process is also different. The following Fodamon engineers will introduce in detail the ore characteristics, beneficiation methods and equipment of these four types of manganese ores.
Beneficiation method of manganese oxide oreManganese oxide ore accounts for most of the available manganese ore. A large amount of slime is often produced in surface oxidized manganese ore, but it usually contains a lot of manganese minerals. Therefore, the treatment of manganese ore slime is also a very important aspect. On the basis of this classification, according to the manganese content and the difference of mineral disseminated particle size, it can be divided into massive disseminated rich manganese ore, small and granular disseminated poor manganese ore, and fine granular disseminated poor manganese ore.
Massive disseminated manganese rich oreThe manganese content in this kind of manganese ore is high, and the upper limit of particle size is between 40-75mm. Simple manganese ore dressing method can be used for separation, and high-grade manganese concentrate can be obtained by simple screening or gravity separation. Therefore, the commonly used manganese ore dressing methods include heavy medium beneficiation, jigging beneficiation, shaking table beneficiation, etc. The required equipment includes round vibrating screen, jig, shaker, etc.
Small and granular disseminated lean manganese oreThe manganese content in this kind of manganese ore is low, usually less than 30%, and the manganese mineral particle size is small, the mud content is large, and the treatment method is more complex. Due to the weak magnetism of manganese ore itself, the gravity magnetic flotation combined process is often used to recover the manganese ore at present, that is, part of the slime containing manganese minerals is selected through ore washing, and then the combined process of jigging gravity separation strong magnetic separation flotation is used to recover manganese minerals. The required equipment includes jig, magnetic separator, flotation machine, etc.
Fine granular disseminated lean manganese oreThe manganese content in this kind of manganese ore is generally less than 15%, and the particle size is very small and evenly distributed. It is difficult to use a single mechanical beneficiation method for recovery. Chemical leaching or combined process of mechanical beneficiation and chemical leaching is usually used.
Beneficiation method of carbonate manganese oreThe manganese minerals in carbonate manganese ore mainly exist in the form of manganese carbonate with fine disseminated particle size. Flotation is the main beneficiation method for this kind of manganese ore, but there are some problems such as high metal loss and high reagent consumption. Therefore, it is necessary to cooperate with high intensity magnetic separation or gravity separation in production. The required equipment is JJF flotation machine, SF flotation machine, magnetic separator and so on.
Beneficiation method of ferromanganese oreManganese is the main recovery metal in iron manganese ore, and the total content of manganese and iron is more than 30%. Compared with manganese oxide ore, iron manganese ore is more difficult to separate, and the difficulty lies in the separation of iron and manganese minerals. In production, the method of washing jigging gravity separation roasting magnetic separation can be used to recover iron concentrate and manganese concentrate. Manganese concentrate containing 5.4% iron and 46.3% manganese can be obtained, and the recovery rate can reach 75.5%. The required equipment includes drum washing machine, jig, magnetic separator, etc.
Beneficiation method of manganese bearing iron oreThe content of manganese in this kind of ore is low, only 5% 10%. At the same time, it has the characteristics of fine disseminated particle size and close symbiosis of iron and manganese minerals, so it is difficult to recover by mechanical beneficiation. The chemical leaching method is a common mineral processing method for this kind of manganese ore, and the recovery index is obviously better than the traditional mechanical separation method.
Mineral processing method of polymetallic composite manganese oreIn addition to manganese minerals, there are a certain amount of iron, lead, zinc, magnesium, aluminum, copper, silver and other metal minerals, mostly in the form of oxide ore. Manganese minerals are closely combined with silver, iron and other minerals, which are difficult to separate. For this kind of ore, high intensity magnetic separation, gravity separation, flotation and other mineral processing methods can be used. Firstly, the slime of manganese ore is separated by washing and sieving, and then other recoverable minerals are separated. The required equipment includes drum washing machine, linear vibrating screen, magnetic separator, XCF flotation machine, etc.
To sum up, we can find that due to the special nature of manganese ore, the slime also contains a lot of manganese minerals, and the slime is also an important part of manganese recovery. Therefore, it is necessary to pay more attention to the recovery of ore slime in order to ensure that the recovery rate of manganese ore can reach the expectation. It is suggested that the mine owner should consult the manufacturer with the overall qualification of the concentrator, select reasonable manganese ore dressing process flow through scientific beneficiation test report, and customize various manganese ore dressing equipment to ensure ideal recovery benefits.