Phosphorite beneficiation process
Crushing and screeningPhosphate ores with different compositions have lower hardness and belong to brittle to moderately crushable ores. Therefore, crushing and sieving usually adopt two-stage one-closed or two-stage open-circuit processes. Phosphate ore crushing equipment generally chooses jaw crusher or gyratory crusher; medium crushing equipment generally chooses cone crusher; screening equipment generally chooses circular vibrating screen or linear vibrating screen.
GrindingPhosphate rock is a kind of ore with good grindability. Therefore, the grinding process of phosphate rock usually adopts one-stage closed-circuit grinding process or two-stage one-closed circuit grinding process. The grinding equipment used is usually a ball mill. Conventional ball mills (lattice ball mills or overflow ball mills) consume more energy, consume more steel, and have higher grinding costs. Various energy-saving ball mills produced by JXSC can significantly reduce the energy consumption and consumption of steel (reduction of 20%~30%). In addition, the super wear-resistant rubber mill liner can effectively increase the service life of the liner and increase the mill Equipment operating rate.
FlotationProcess advantages: can process ore of various properties. 1. Positive flotation can remove siliceous gangue from the ore, and can treat siliceous phosphorite and sedimentary metamorphic silicon-calcium apatite; 2. A single reverse flotation can remove calcium (magnesium) gangue, can deal with sedimentary calcium (magnesium) phosphate rock; 3. Forward-reverse flotation (reverse-positive) flotation and double-reverse flotation can achieve the purpose of enriching phosphorus minerals by removing silicate minerals and carbonate minerals, so it can deal with refractory sedimentary calcium calcium (magnesium) ) Quality phosphorite rock; 4. Stage flotation can treat gangue minerals and phosphate minerals with fine-grained colloidal phosphate minerals. The beneficiation index of the flotation process is good. The W (P2O5) grade of phosphate concentrate can reach 30%~40%; the phosphorus recovery rate can reach 75%~90%.
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Phosphorite flotation equipment include self-aspirating mechanical agitation, aeration agitation, air-lift and decompression flotation machines. The JXSC flotation machine equipment has complete specifications and models (available for selection by large, medium and small-scale beneficiation plants), high operation rate, low maintenance rate, low energy consumption, good flotation index and low price, which greatly reduces the flotation cost of the concentrator.