FIELD: chemistry.
SUBSTANCE: method for phosphorus and calcium extraction from steelmaking slag, which comprises steel slag contacting with an aqueous solution containing 30 ppm or more of carbon dioxide, to elute phosphorus and calcium contained in the steelmaking slag into the aqueous solution, and then carbon dioxide removal from the aqueous solution to precipitate a mixture containing phosphorus compound and calcium compound. The mixture obtained by the above method, comprising a calcium compound and a phosphorus compound, wherein the phosphorus content is 1 wt % or more in terms of atoms. The invention is developed in subclaims.
EFFECT: lower cost of the method and preparation of mixtures containing calcium and phosphorus compounds.
8 cl, 3 dwg, 6 tbl, 5 ex
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