| 摘要 |
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 15-20C 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 |
