FIELD: technological processes.
SUBSTANCE: invention relates to a method for processing the refractory part of the spent lining of aluminum electrolysis cells. Method comprises grinding the lining in an aqueous medium, leaching, separating the liquid and solid pulp phases, treating the solution to release the fluoride product, the pulp is treated with a solution of sludge water at a temperature of not more than 60 °C for 2–4 hours, the pulp after leaching is directed to thickening, filtering and drying to obtain chamotte concentrate.
EFFECT: provides recycling of fluorine-containing waste with a high percentage of fluoride extraction.
6 cl, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| PROCEDURE FOR PROCESSING FLUORINE-CARBON-CONTAINING WASTES OF ALUMINIUM ELECTROLYTIC PRODUCTION | 2015 |
|
RU2616753C1 |
| METHOD FOR PROCESSING SPENT THERMAL INSULATION LINING OF ALUMINIUM ELECTROLYSER | 2016 |
|
RU2643675C1 |
| METHOD FOR PROCESSING FLUORIDE AND SILICON CONTAINING WASTE OF ALUMINUM MANUFACTURE | 2017 |
|
RU2675916C1 |
| METHOD FOR PROCESSING COAL FOAM OF ALUMINUM ELECTROLYTIC PRODUCTION | 2018 |
|
RU2685566C1 |
| METHOD FOR PRODUCING CALCIUM FLUORIDE FROM FLUOROCARBON-CONTAINING WASTE OF ALUMINIUM PRODUCTION | 2016 |
|
RU2627431C1 |
| METHOD OF PROCESSING SPENT LINING OF ALUMINIUM ELECTROLYTIC CELL | 2015 |
|
RU2609478C1 |
| PROCEDURE FOR PROCESSING SOLID FLUORINE-CARBON-CONTAINING WASTE OF ELECTROLYTIC PRODUCTION OF ALUMINIUM | 2010 |
|
RU2429198C1 |
| METHOD OF PRODUCING ALUMINIUM FLUORIDE | 2011 |
|
RU2462418C1 |
| METHOD FOR PROCESSING SPENT CARBON LINING OF ALUMINIUM ELECTROLYSER | 2016 |
|
RU2630117C1 |
| METHOD TO PRODUCE CARBON NANOPARTICLES | 2010 |
|
RU2433952C1 |
