FIELD: chemical industry.
SUBSTANCE: invention relates to processing waste from plants of chemical and metallurgic industry, in particular, to technology for utilization of phosphogypsum. Method for processing phosphogypsum involves mixing phosphogypsum with lime-containing addition and water followed by granulating wherein additive comprises finely divided slaked lime or unslaked lime and, additionally, powdered dolomite wherein particles size of additive is up to 6 mcm. After granulation method involves carrying out drying with cold air at temperature 15-20°C in the following ratio of components, %: phosphogypsum, 70-73; indicated lime, 4-6; powdered dolomite, 1.8-2,2, and water, 9-24. Invention provides carrying out the processing process of phosphogypsum at significant decrease of energy consumptions and retaining ecological safety for its manufacture and using.
EFFECT: improved processing method.
3 tbl
| Title | Year | Author | Number |
|---|---|---|---|
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RU2604693C1 |
| METHOD OF PRODUCING MINERALIZER BASED ON CALCIUM FLUORIDE | 2020 |
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RU2736038C1 |
| METHOD OF THE GRANULATED PHOSPHOGYPSUM MAKING | 1992 |
|
RU2087420C1 |
| METHOD OF PROCESSING FRESH PHOSPHOGYPSUM | 2018 |
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RU2723804C2 |
| METHOD FOR PRODUCTION OF CONSTRUCTION MORTAR | 2007 |
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| COMPOSITE BUILDING MATERIAL | 2023 |
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RU2767535C1 |
| METHOD OF PROCESSING OF GYPSIFEROUS WASTES FOR UTILIZATION IN THE INDUSTRY OF CONSTRUCTION MATERIALS | 2005 |
|
RU2268864C1 |
| MIXTURE OF MAKING LIGHT CONCRETE AND LIGHT CONCRETE | 2008 |
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RU2399598C2 |
| METHOD OF PROCESSING OF PHOSPHO-GYPSUM | 2010 |
|
RU2456358C1 |
