发明授权
- 专利标题： Red mud dewatering and washing process
- 专利标题（中）： 红泥脱水洗涤过程
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申请号： US817207申请日： 1997-10-16
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公开(公告)号： US6033579A公开(公告)日： 2000-03-07
- 发明人: Hubert Riemer , Nils Oeberg , Heinz Perchthaler , Paolo Murgia , Mario Noriega
- 申请人： Hubert Riemer , Nils Oeberg , Heinz Perchthaler , Paolo Murgia , Mario Noriega
- 申请人地址： AUX Graz
- 专利权人： Andritz-Patentverwaltungs-Gesellschaft m.b.H
- 当前专利权人： Andritz-Patentverwaltungs-Gesellschaft m.b.H
- 当前专利权人地址： AUX Graz
- 优先权： ATX1943/94 19941014
- 主分类号： B01D11/00
- IPC分类号： B01D11/00 ; B01D11/02 ; B01D33/21 ; B01D35/31 ; C01F7/06 ; B01D37/00
摘要：
The invention covers a process for dehydration/filtration, and washing of red mud, if applicable with addition of sand, particularly from the Bayer process for aluminum production from bauxite, in which filters are used and caustic is washed out on the filter. The invention is basically characterized by washing and dehydration being effected under pressure above atmospheric with regeneration of bound caustic and production of a residue with a high solids concentration. In addition, the invention covers a plant for the implementation of the process.