发明名称 |
Verfahren und Anlage zur Aufarbeitung zinkhaltiger Abfälle mittels basischer Laugung |
摘要 |
<p>A zinc-containing waste treatment process involves neutralizing (40) part of a used leaching solution, after zinc electrowinning (26), with waste acid to form a zinc-rich hydroxide sludge for recycling (50) to the leaching stage. A zinc-containing waste treatment process comprises (a) alkaline leaching (2) of the waste (8); (b) purification of the leach solution especially by cementation (18); (c) extraction of the zinc especially by electrolysis (26); (d) direct recycling of only a first fraction of the used solution (36) containing dissolved parasitic components (especially chlorides and sulfates); and (e) neutralization (40) of a second fraction of the used solution with waste acid to form a zinc-rich metal hydroxide sludge which is separated (45) and recycled (50) to the leaching stage. An Independent claim is also included for an installation for carrying out the above process.</p> |
申请公布号 |
DE69914384(D1) |
申请公布日期 |
2004.03.04 |
申请号 |
DE1999614384 |
申请日期 |
1999.02.12 |
申请人 |
TREZ, AIGUEBELLE |
发明人 |
CHARPENTIER, PIERRE-EMMANUEL;GIRARDOT, JEAN-CLAUDE;RIZET, LAURENT |
分类号 |
C22B3/12;C22B7/00;C22B7/02;C22B19/20;C22B19/30;C25C1/16;(IPC1-7):C22B19/30 |
主分类号 |
C22B3/12 |
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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