发明名称 |
FOERFARANDE FOER AOTERVINNING AV ZINK OCH/ELLER ICKEJAERNMETALLER UR EN JAERNHALTIG LAESNING ELLER ETT FAST MATERIAL |
摘要 |
<p>The specification discloses a method for recovering non-ferrous metals such as zinc or copper from their concentrates, ores or any other metal containing materials into a solution containing these non-ferrous metals as sulphates and a minimal amount of dissolved iron. The resultant solution is suited without or with minimum pre-purification treatment for conventional electrowinning processes to recover such non-ferrous metals with less difficulties than the previous methods involving complex iron-removal processing. There is disclosed a method for recovering at least one non-ferrous metal soluble in sulphuric acid from a strong sulphuric acid solution containing said metal and iron as sulphates, said method comprising the following consecutive steps: subjecting said solution in a sub-divided form to thermal decomposition in a fluidized bed reactor at a temperature of from 600 DEG to 750 DEG C. with 20-150% excess air for an average retention time of 1-12 hours to obtain calcine containing ferric oxide and the sulphate of said non-ferrous metal; leaching said non-ferrous metal sulphate out from said calcine with water or dilute sulphuric acid solutions; separating said leach solution containing said non-ferrous metal sulphate from the residue; and recovering said non-ferrous metal from said leach solution, via electrolysis or any other method.</p> |
申请公布号 |
FI69104(C) |
申请公布日期 |
1985.12.10 |
申请号 |
FI19790001433 |
申请日期 |
1979.05.03 |
申请人 |
PROVINCIAL HOLDINGS LTD |
发明人 |
WILKOMIRSKY IGOR A E;BOORMAN ROY S;SALTER ROBERT S |
分类号 |
C22B19/00;C22B1/00;C22B1/02;C22B1/10;C22B3/00;C22B3/04;C22B3/08;C22B3/20;C22B3/22;C22B15/00;C22B19/20;C25C1/16;(IPC1-7):C22B3/00;C22B15/08;C22B19/22 |
主分类号 |
C22B19/00 |
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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