发明名称 |
RECYCLING OF SPENT POT LININGS |
摘要 |
<p>A process is described for the treatment of spent pot lining material from electrolyte reduction cells, this spent material having a substantial content of cryolit e. The spent material is first leached with water at a dilution and a time sufficient to dissolve substantially all water soluble fluorides, after which the solid residue is separated from the liquid. The solid residue obtained is then subjected to a caustic leach with an aqueous sodium hydroxide solution containing about 20 to 50 g/L of NaOH and thereafter the solid residue is separated from the liquid.</p> |
申请公布号 |
CA2327878(C) |
申请公布日期 |
2005.02.15 |
申请号 |
CA20002327878 |
申请日期 |
2000.12.07 |
申请人 |
ALCAN INTERNATIONAL LIMITED |
发明人 |
KASIREDDY, VIJAYA;KIMMERLE, FRANK M.;BERNIER, JEAN-LUC |
分类号 |
B01D11/02;B09B3/00;B65G23/44;C22B3/04;C22B7/00;C22B21/00;(IPC1-7):C22B3/04 |
主分类号 |
B01D11/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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