FIELD: chemistry.
SUBSTANCE: invention relates to chemical industry. Method involves treatment of phosphogypsum from water-soluble residues of acids by mixing it with water and intensive stirring until dissolution of said residues in water. Phosphogypsum is squeezed from water and obtained water is removed. Such water are mixed with raw material, containing calcium carbonate and used for wet cement production method. Sludge is obtained, containing fluorspar. Purified phosphogypsum is granulated and dried with air. Calcium sulphate dihydrate is obtained, which is used as an additive in ground clinker, obtained in making cement using a wet method.
EFFECT: technical result is reduction of power consumption, temperature during cement production, consumed fuel, optimising and simplifying technology for production of cement.
7 cl, 4 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING MINERALIZER BASED ON CALCIUM FLUORIDE | 2020 |
|
RU2736038C1 |
| METHOD OF PRODUCING AND COMPOSITION OF BELITE CLINKER | 2020 |
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| PROCEDURE FOR PROCESSING FINE-DISPERSED SODIUM-FLUORINE-CARBON CONTAINING WASTES OF ELECTROLYTIC PRODUCTION OF ALUMINIUM | 2009 |
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| PROCEDURE FOR PROCESSING FLUORINE-CONTAINING MATERIALS USED IN ELECTROLYTIC PRODUCTION OF ALUMINIUM | 2009 |
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RU2402621C1 |
| ACTIVE ANHYDRITE MANUFACTURING PROCESS | 2005 |
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RU2297989C1 |
| SULFIDIZING AGENT FOR REDUCTION SULFIDIZING MELTING OF OXIDIZED NICKEL ORES | 2002 |
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RU2224807C1 |
| METHOD OF PRODUCING WET-PROCESS PHOSPHORIC ACID FROM KARATAU PHOSPHORITE TYPE RAW MATERIAL | 2010 |
|
RU2437831C1 |
