发明名称 |
VERFAHREN ZUR DEKONTAMINATION VON DURCH METALLE VERUNREINIGTEN BÖDEN |
摘要 |
<p>PCT No. PCT/FR93/00461 Sec. 371 Date Feb. 10, 1995 Sec. 102(e) Date Feb. 10, 1995 PCT Filed May 13, 1993 PCT Pub. No. WO93/24249 PCT Pub. Date Dec. 9, 1993The invention relates to a hydrometallurgical process for decontaminating soils 1 which are polluted with metallic elements, comprising a stage of basic leaching I so as to bring about the dissolution of the metallic elements to be removed, a cementation stage II bringing about the precipitation 6 of said elements in metal form, performed by electrochemical exchange with a zinc powder 5 produced by a stage of electrolysis III of the solution 7 originating from the cementation stage. In accordance with the invention a complementary addition of zinc is performed, preferably at the exit of the leaching stage in the form of a leachate 17 of waste from iron and steel manufacture, especially of dust 13 from electrical steel manufacture 15.</p> |
申请公布号 |
DE69318297(D1) |
申请公布日期 |
1998.06.04 |
申请号 |
DE1993618297 |
申请日期 |
1993.05.13 |
申请人 |
UNIMETAL, ROMBAS, FR |
发明人 |
RIZET, LAURENT, F-74250 VIUZ-EN-SALLAZ, FR;CHARPENTIER, PIERRE, EMMANUEL, F-74100 VILLE-LA-GRAND, FR |
分类号 |
B09B3/00;B09C1/02;B09C1/08;C22B3/14;C22B7/00;C25C5/02;(IPC1-7):B09B3/00 |
主分类号 |
B09B3/00 |
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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