Method for comprehensively utilizing low-grade phosphate ores
A phosphate rock, low-grade technology, applied in the field of comprehensive utilization of low-grade phosphate rock, can solve the problems of high equipment maintenance cost, high acid and alkali consumption, high investment cost, etc., to reduce investment cost and operating cost, calcium ion The effect of reducing the content and shortening the process flow
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[0029] Such as figure 1 The method for the comprehensive utilization of low-grade phosphate rock shown, its steps are as follows:
[0030] 1) The laterite nickel ore and low-grade phosphate rock are ball-milled (wet-milled) in their respective grinding systems, and the proportion of the particle size of the laterite nickel ore and low-grade phosphate rock after ball milling is within 100 mesh ≥95%, and dehydrate the ore after ball milling to obtain laterite nickel ore and low-grade phosphate rock with a moisture content of ≤35%.
[0031] 2) The lateritic nickel ore and low-grade phosphate rock obtained in step 1) are mixed with concentrated hydrochloric acid with a mass percentage of 20-35%, and the amount of phosphate rock is based on reducing the Fe concentration of the leachate to below 1g / L . The leaching reaction is carried out in a closed jacketed kettle. Steam is used as a heat source to supply heat to the reaction process in the jacket. The outer wall of the jacketed...
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