发明授权
- 专利标题: Method of reprocessing jarosite-containing residues
- 专利标题(中): 后处理包含黄钾铁矾渣的方法
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申请号: US602017申请日: 1990-10-23
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公开(公告)号: US5453253A公开(公告)日: 1995-09-26
- 发明人: Adolf Von Ropenack , Winfried Bohmer , Heiner Grimm
- 申请人: Adolf Von Ropenack , Winfried Bohmer , Heiner Grimm
- 申请人地址: DEX Datteln
- 专利权人: Ruhr-Zink GmbH
- 当前专利权人: Ruhr-Zink GmbH
- 当前专利权人地址: DEX Datteln
- 优先权: DEX3935362.1 19891024
- 主分类号: B03B9/04
- IPC分类号: B03B9/04 ; B09B3/00 ; C01B17/02 ; C01B17/06 ; C22B20060101 ; C22B3/00 ; C22B3/08 ; C22B7/00 ; C22B9/02 ; C22B19/20 ; C22B19/30 ; C25C1/00 ; C25C1/16
摘要:
For reprocessing of jarosite-containing residues to provide usable products, the jarosite-containing residues and concentrates which contain zinc sulfide are stirred in dilute sulfuric acid, which contains 40 to 100 g/l free sulfuric acid, in an autoclave under an oxygen partial pressure of at least 1,000 kPa and at a temperature from 130.degree. to 170.degree. C., the iron contents and the zinc contents of the residue and of the concentrate which contains zinc sulfide are substantially dissolved, flashing is effected and is succeeded by a separation of solution and solids, the solution is fed to the leaching circuit of a plant for the electrolytic production of zinc with precipitation of iron as hematite, the elemental sulfur is separated from the solids and the hematite residue is supplied to a further utilization.
公开/授权文献
- US5729308A Active matrix display device 公开/授权日:1998-03-17