A jig is a device that drives pulses of water upwards through a thick bed of settled sediment in order to keep it loose and agitated. This achieves gravitational separation by allowing the denser minerals to sink easily and quickly through the lighter minerals. A typical jig consists of a water-filled tank known as a jig-cell, with a horizontal jig screen (mesh) near the top, upon which sediment is able to settle as the jig bed. Pulses of water are injected from below, through the jig screen. Each pulse causes the jig bed to be watercharged, loose and agitated, permitting denser minerals to fall to the bottom of the jig bed. The jig screen traps gold nuggets, but the smaller gold falls through the jig screen and to the bottom of the hutch (water tank) to accumulate as a concentrate. The concentrate is bled off continuously through a spigot (tap) in the base of the hutch, as shown below:
A feature of jigs is that the composition of the jig bed can be carefully designed by placing a layer of coarse dense particles known as ragging on the jig screen. These may include steel balls or a suitable heavy mineral such as hematite Fe2O3. By this means, only very dense grains will penetrate through the ragging and fall through the jig-screen. Grains of lower density (e.g. quartz SiO2) remain above the ragging.
Low water consumption when compared with most centrifugal concentrators. A high degree of recoveries recover 0.5% to 30% concentrate, increasing recovery rate. Wide feed and particle size recovery feed size up to 30mm, which reduces the step of prescreening the feed. Improve the potential for gravity recovery and avoid excessive grinding efficient low operating costs, low water consumption.
Spiral classifier and hydrocyclone are the main equipments for the classification operation of the concentrator. Although the rapid development of the cyclone once made the spiral classifier lose its market, but with the continuous changes in the requirements of the selection plant, it was found that the spiral classifier also has its advantages. The spiral centrifugal classifier has the advantages of strong continuous operation, large processing capacity, low energy consumption per unit output, and convenient maintenance. It can handle particles with a diameter of 1um-10mm. The horizontal spiral centrifugal classifier adopts the method of wet classification, and its processing capacity can reach 1~20 (m3 slurry) kg/h. It is widely used in minerals, metal powders, chemical raw materials, pigments, fillers, etc.
The screw classifier is based on the principle that the solid particles are different in size and specific gravity, so the settling speed in the liquid is different. Fine ore particles float in the water and overflow, and coarse ore particles sink to the bottom of the tank. Spiral classifier is widely used in beneficiation plant to match with ball mill to form a closed circuit circulation path to distribute ore sand. Filter the material powder milled in the mill, and then use the spiral piece to screw the coarse material into the ball mill inlet, and the filtered fine material is discharged from the overflow pipe. There are four classifiers: high weir single spiral and double spiral, submerged single spiral and double spiral.
The spiral classifier is widely used in the classification of the grinding circuit of the concentrator and the operations of washing, desilting and dewatering. Its main advantages are simple equipment structure, reliable work and convenient operation.
1. It is used for the separation of machine-made sandstone powder, which can control the content of machine-made sandstone powder very conveniently and meet the requirements of users.2. It is suitable for dry technology large and medium-sized sand production lines.3. The content of 0.000.75mm stone powder can be adjusted between 2%-15%.4. Stone powder quality is easy to control, fineness adjustment is convenient, flexible and reliable.5. Using frequency conversion control technology, the operation is more concise.6. It can be connected with the mill in the closed circuit of the grinding circuit. Compared with hydrocyclone, the power consumption is lower.7. The main disadvantage is that the classification efficiency is low, the equipment is bulky, and the floor space is large. Due to the limitations of equipment specifications and production capacity, it cannot generally form a closed circuit with a ball mill of 3.6m or more.
The spiral classifier is divided into two types: high weir type and submerged type. High weir classifier is suitable for coarse particle classification, the maximum size of overflow is generally 0.4~0.15mm; submerged classifier is suitable for fine particle classification, the maximum size of overflow is generally below 0.2mm.
[Improvement]: The cone slide valve is adopted; the failure rate is reduced by 80%; low energy consumption;the separation of different material, improvement of the processing capacity by more than 35%.
Diaphragm Jig is divided into two kinds of models including left-hand machine and right-hand jig cover. With the fixed sieve, the jig is suitable for metal ore classification such as placer contained tungsten and gold, tin concentration ore. This jig can be used not only for classification of fine-grained materials but also for that of raw materials with the largest size of 6-8 mm, but in the individual case of placer classification, the largest size is up to 12 mm.
Forui jig separators belongs to mining gravity separation equipment, which can separates minerals like gold, tin, iron, manganese, etc. You won't fail to get the right gravity jigging separator in Forui Machinery.
Our mineral separators reffers to different grinding equipment including jaw crusher, fine crusher, ball mill, rod mill, etc. We give you free test with our mineral separators if mineral sample available.
Gongyi Forui Machinery Factory is a professional mineral processing machine manufacturer in Gongyi, China. Our products include jigger, magnetic separator, tin processing machine, iron separator, manganese separator, mineral separator, ore washing, dewatering screen, etc. Founded in 1986, Forui Machinery Factory has more than 25-year experience in ore(slag) beneficiation equipment.
Only Forui Offers a Comprehensive Performance Guarantee. You can always order with confidence from Forui knowing well provide what you need-guaranteed. We offer 24-hour hotline/online service, offering you timely suggestion on product problems anytime, and comprehensive solutions through our specialty divisions. Controls & Instrumentation An ore dressing production line is nothing without properly integrated controls and instrumentation. At Fouri, we use top quality materials and maintain a deep repository of engineering knowledge and experience to deliver the most robust, agile and adaptable control systems in the industry.
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Gongyi Forui Machinery Factory is located in Gongyi City, Henan Province, China with its convenient transportation and beautiful scenery. The main products cover jigging machines, amalgamator,magnetic separators, grinding & milling equipment, classifier equipment, etc. Forui has been in the ore and slag beneficiation field for over 25 years from the single magnetic separator manufacturing to a whole