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MAGNETITE PRODUCTION FROM BAUXITE RESIDUE 发明申请

2023-03-03 3030 238K 0

专利信息

申请日期 2025-07-11 申请号 US16213243
公开(公告)号 US20190177178A1 公开(公告)日 2019-06-13
公开国别 US 申请人省市代码 全国
申请人 Worcester Polytechnic Institute
简介 A low-temperature leaching operation employs a raw, red mud slurry directly from aluminum production for an oxalic acid leaching of ferric oxalate. Residual calcium, titanium, aluminum and other rare earths are also recoverable in a secondary stream. Monitoring and control of the pH of the leach solution yields soluble ferric oxalate without high temperatures or specific radiation or light sources. Addition of iron powder results in precipitation of ferrous oxalate, isolated by magnetic separation from the iron powder which recirculates in the solution. Magnetite may then be produced by heating the ferrous oxalate in low pO2 conditions.


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