Phosphate ore Flotation process

Characteristics of phosphate rock resources:
Phosphate composition is complex.Sedimentary phosphate is dominant In phosphate rock resources.Different types of ore beneficiation degree of difficulty and process are quite different,due to the ore-forming conditions, mineral type and content, dissemination size, structure and other aspects of difference.Phosphate rock is divided into siliceous phosphate rock, calcium phosphate rock and silicon calcium phosphate rock, in accordance with the chemical composition of the mineral.For the different ore types, the separation process is also different.
 

Phosphate ore Flotation process status
Applications at home and abroad sorting phosphate process is perfect, but have their own advantages and disadvantages. Following a brief introduction to the more commonly used technology.

(A) Phosphate ore positive flotation process
The process is generally used for the classification of low-grade phosphate rock, including the processing of of siliceous and silicon, calcium phosphate and calcium magnesia phosphate.The process must have a strong inhibition inhibitors used in conjunction with in order to get satisfactory results, is mainly used in the phosphate rock materials and fine disseminated gangue minerals.
In recent years, the L-series and S-series of highly efficient inhibitors continue to be successfully developed, sedimentary-metamorphic rock phosphate flotation can get better, but only for low MgO content of the ore and direct filtration more difficult, which limits the process of phosphate production and promotion.

(B) Phosphate ore anti-flotation process
The process is mainly used in separation of plastic phosphate and dolomite, often in weakly acidic medium using fatty acids as collector, dolomite float, the product of the flotation cell excretion rate of phosphorus ore, dolomite up to 70% to 80%.Dolomite discharge rate and the ratio of the loss rate of P2O5 is generally (6 to 10): 1.But it can not separate siliceous gangue, at the same time there is a fine grain size of foam products, transmission and treatment of refractory and other shortcomings, looking COLLECTING appropriate and selective flotation and excellent inhibitors and other issues still exist. Roughing divided into three dosing three times a scavenger anti-flotation process, quite satisfied sorting index.
When the grade of ore P2O5 to 27.07% MgO content of 4.22%, when the grinding fineness-0.071mm (-200 mesh) 66.4%, with phosphoric acid as an inhibitor of the reverse flotation available P2O5 grade for 32.91%, MgO as0.92% of the high-phosphate concentrate, P2O5 recovery to 92.88%, MgO exclusion was 83.33%.
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