The metal minerals in the ore included pyrite, chalcopyrite, limonite, hematite, etc. Gangue minerals included quartz and calcite. The raw ore contained granular gold. The upper part of the mine was oxidized ore, and the lower part was sulfide ore.
Crushing and screening system:The crushing and screening system adopted two semi-closed circuit process. The ore in the raw ore bin was fed to the jaw crusher by the chute feeder for coarse crushing, and the coarsely crushed products were transported to the double-layer circular vibrating screen by the No.1 belt conveyor for screening. The product on the upper screen was fed to the jaw crusher for crushing, and the crushed product and the product on the lower screen were fed to the No. 2 belt conveyor together, and then fed into the cone crusher by a heavy-duty mobile belt conveyor for fine crushing. Together with the coarsely crushed product, it was returned to the double-layer circular vibrating screen via the No.1 belt conveyor. The particle size of the product under the screen was -12mm and was transported to the powder ore bin by No.3 and No.4 belt conveyor, which formed two semi-closed crushing processes.
Grinding and grading system:It adopted two-stage closed-circuit grinding process. The first stage grinding and grading adopted a grid ball mill and a high weir single spiral classifier, and the grinding fineness was -200 mesh accounting for 45-50%; the second stage grinding adopted an overflow ball mill and hydrocyclone, and the final grinding fineness was -200 mesh accounting for 70%.
Gravity separation system:In combination with the recommended process flow and ore properties of beneficiation test, at the discharge point of first stage ball mill added a gravity separation system. The ore pulp discharged from the first stage of the ball mill was selected by a sawtooth wave jig, and the coarse beneficiation concentrate was selected by a shaker. The concentrate of the shaker was a heavy sand product, which was dewatered for sale after being precipitatedin a precipitation tank. The middle tailings of the shaker were pumped into the thickener, and then sold as gold concentrate after being dewatered with gold concentrate in flotation.
Flotation separation system:Flotation adopted a process of one roughing, two scavenging and three concentration processes. The pulpflew to the flotation system by itself after agitation. The roughing and scavenging operations adopted XCF-4 and KYF-14 flotation units. The concentration operation adopted BF-2.8 flotation cell. The pulp entered the next operation in turn, and the flotation foam returned to the previous operation in turn. The flotation concentrate flew to the pump box by itself and was pumped into the concentrate dewatering system by the concentrate pump. Flotation tailings was pumped to the tailings dewatering system.
Concentrate dewatering system: The flotation concentrate was pumped into the central transmission thickener for thickening through the concentrate pump. The thickener overflows returned to the production system. The underflow concentration of the thickener was about 40%, which was pumped into the chamber filter press for filtration, and the filtrate was pumped to the thickener. The filter cake was the final gold concentrate, which was stored in the concentrate pond for sale, thus formed the two-stage mechanical dewatering process.
Tailings dewatering system:Flotation tailings entered the tailings dewatering system. The tailings dewatering system adopted the two-stage mechanical dewatering process of thickening and filter press process. Concentration adopted a central transmission thickener, with 35%-40%-concentration underflow of the thickener, which was pumped into the chamber filter press through a slurry pump. The filter press filtrate and the overflow of the thickener returned to the high seated production pool through the pump.The tailings filter cake was stored in the temporary tailings pond. According to the company's production plan, tailings will be used as raw materials for brick-making in the future.
Limonite is one of the main iron mines, which is a kind of brown natural polymineral mixture. The main component is iron oxide. Limonite is a secondary iron ore with low iron content, which is easier to extract. Besides, it is also used as pigment, even the pigment substance in loess. So, Xinhai introduces the main limonite beneficiation process.
Raw ore is sent to wet grid type ball mill until -200 mesh limonite ore particle accounts for 96% ~ 96%, the pulp concentration reaches 50% ~ 60%, then grinding products are sent to Xinhai high weir spiral classifier for classification overflow, next to -200 mesh round vibrating screen. Finally, the pulp concentration is adjusted to 20% ~ 20%, and unsized ore grain return to wet grid type ball mill for regrinding.
1. Roughing: Xinhai carry on slurry desliming firstly, the slurry discharged from concentrates mouth and middlings mouth is up to 15% ~ 25%, and then enter into cleaning. The sludge on the edge of spiral chute and tailings are discharged into tailings pond.
2. Cleaning: Xinhai carry on slurry desliming and cleaning, and get concentrates from concentrate mouth, then adjust middlings pulp concentration to 15% ~ 25%, next to second cleaning. The sludge on the edge of spiral chute and tailings are discharged into tailings pond.
3. Second cleaning: Xinhai carry on slurry desliming and cleaning, and get concentrates from concentrate mouth, then adjust middlings pulp concentration to 15% ~ 25%, next to reverse flotation process. The sludge on the edge of spiral chute and tailings are discharged into tailings pond.Reverse Flotation ProcessXinhai add 100g ~ 200g/t inhibitors and 100g ~ 150g/t collector to middlings pulp, and mix them about 2 - 3 minutes, then adopt reverse flotation process under normal temperature and PH7 conditions about 10 to 12 minutes, finally obtain high-grade limonite concentrate.In limonite beneficiation process, Xinhai not only separate limonite concentrates, but also optimize the whole ore dressing process and extremely improve the limonite grade.
Xinhai add 100g ~ 200g/t inhibitors and 100g ~ 150g/t collector to middlings pulp, and mix them about 2 - 3 minutes, then adopt reverse flotation process under normal temperature and PH7 conditions about 10 to 12 minutes, finally obtain high-grade limonite concentrate.
Application copper sulfide, gold sulfide, zinc, lead, nickel, antimony, fluorite, tungsten, and other non-ferrous metals, and also be used for coarse selection for ferrous metals and nonmetals. Type Agitating flotation machine, Self-priming, aeration flotation, flotation column. ModelXJK, SF, GF, CHF, XJC, etc. Contact us for specific & quick selection.
Flotation machine (floatation machine, planktonic concentrator) in the mineral processing plant, mainly used for separating copper, zinc, lead, nickel, gold, and other non-ferrous metal. TypeXJK series agitation impeller flotation machine (Seldom used, small capacity); SF flotation machine (Larger volume, better flotation effect); Pneumatic flotation machine (aeration and agitation, high capacity). Corollary equipmentIn front: one or two sets of mixing tank for flotation agent agitation and slurry pulp agitation. Behind: concentrate pond, thickener or filter Flotation cell According to the ore grade, mineral type and processing capacity to choose, determine the number of the flotation cells. It is recommended that carrying out the mineral flotation tests to obtain the best procedure plan, like pulp density, time, reagent selection, etc. Flotation reagentfoaming agent, collecting agent, activating agent, inhibitor, etc. BrandsWemco flotation unit, Fahrenwald Denver, Callow, BGRIMM, etc. How to select mining flotation machine1. According to the nature of the ore (washability, feed particle-size, density, grade, pulp, pH, etc.) and flotation plant scale choose the appropriate flotation machine. 2. The concentration operation is mainly to improve the ore concentrate grade. The flotation foam layer should be thin so that separates the gangue. It is not appropriate to use a flotation machine with a large aeration volume. Therefore, there are differences between the froth flotation machine of concentration, roughing and scavenging. 3. JXSC engineer team here to help do flotation mining machine selection, price inquiry, flowsheet design.
Flotation machine structureThe metallurgist flotation mainly made up of slurry tank, mixing device, aeration device, mineralized bubble discharging device and motor. Flotation machine working principleFlotation process refers to the flotation separation in mineral processing. In the flotation machine, the ore slurry treated with the added agent, by aeration and stir, some of the ore particles are selectively fixed on the air bubbles and floats to the surface of the slurry and is scraped out. The rest is retained in the pulp, thus achieve the purpose of separating different minerals. The complete froth flotation process in metallurgy consists of rougher flotation, concentrate flotation and scavenging flotation. Flotation methodFroth flotation of sulphide ores, mainly have differential flotation and bulk flotation process, improve the flotation recovery rate of fine - particle. Flotation cell manufacturerJXSC specializes in the production of a full set of mineral processing equipment, and cooperates with the Mining Research Institute to design a scientific and reliable mineral processing flowsheet, supply gold flotation, copper flotation, zinc flotation, and the like ore flotation units.Get in Touch with Mechanic