FIELD: non-ferrous metallurgy, possibly removing chlorine and fluorine from dust like materials of lead-zinc production, for example from rotary-kiln sublimates and slag sublimates.
SUBSTANCE: method for removing chlorine and fluorine form dust like zinc-containing materials of lead-zinc production comprises steps of baking materials for producing secondary chlorine- and fluorine-containing sublimates; their further two-stage water-soda washing at temperature 70 - 90°C. Chlorine and fluorine are washed with use of aqueous solution containing sodium sulfate and sodium carbonate at their concentration in initial solution of each stage, respectively 67 - 72 g/l and 8 - 13 g/l.
EFFECT: enhanced degree of removal of chlorine and fluorine due to transforming lead and other metals to insoluble compounds.
1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF REMOVAL OF CHLORINE AND FLUORINE FROM DUST-LIKE ZINC-CONTAINING MATERIALS | 2006 |
|
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| METHOD FOR REMOVING CHLORINE AND FLUORINE FROM PULVERULENT MATERIALS OF LEAD AND ZINC PRODUCTION | 0 |
|
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| METHOD OF PRODUCING ZINC POWDER FROM ZINC-CONTAINING WASTES | 2020 |
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| METHOD OF PRODUCING DRY ZINC WHITE FROM HIGHLY BASIC CARBONATE ORES | 0 |
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| CHARGE FOR WAXING ZINC CONTAINING MATERIALS | 2017 |
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| CLEANING METHOD AGAINST CHLORINE OF SULFATE ZINC SOLUTIONS | 2008 |
|
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| METHOD OF ZINC-CONTAINING SLUDGE PROCESSING | 1991 |
|
RU2020171C1 |
| METHOD OF WASHING LEAD AND ZINC OXIDATED MATERIALS FROM SULFATE,CHLORIDE AND FLUORIDE IONS | 0 |
|
SU1325098A1 |
| METHOD OF PROCESSING OF LEAD CAKES | 1997 |
|
RU2123059C1 |
