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Process for the enrichment in p o of phosphate rock which contains calcium carbonateand for the manufacture of superphosphate
Process for the enrichment in p o of phosphate rock which contains calcium carbonateand for the manufacture of superphosphate
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机译:富集含碳酸钙的磷矿石中磷的方法以及生产过磷酸钙的方法
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摘要
Phosphate rock, containing calcium carbonate, is reduced to a particle size of from 30 to 170 mesh, treated with sufficient 5 to 10 per cent aqueous sulphuric acid to convert part or all of the carbonate to calcium sulphate and the sedimeting phosphate is separated from the suspension of sulphate. The phosphate may be subsequently converted to superphosphates by known methods.
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