发明名称 |
OPERATING METHOD IN HYDROMETALLURGY OF NICKEL OXIDE ORE |
摘要 |
The purpose of the present invention is to provide a method for producing magnesium oxide, according to which highly-pure magnesium oxide having a low content of impurities can be simply and efficiently produced from a sulfuric acid solution containing magnesium and calcium such as waste water. According to the present invention, a sulfuric acid solution containing magnesium and calcium is concentrated in order to precipitate and separate the calcium as calcium sulfate, and a solution obtained from the calcium separation is further concentrated in order to precipitate and separate the magnesium as magnesium sulfate. The separated magnesium sulfate is subjected to roasting together with a reducing agent and magnesium oxide and sulfurous acid gas are obtained. The resulting magnesium oxide is washed thereby producing highly-pure magnesium oxide. |
申请公布号 |
PH12014501373(A1) |
申请公布日期 |
2014.09.22 |
申请号 |
PH12014501373 |
申请日期 |
2014.06.17 |
申请人 |
SUMITOMO METAL MINING CO., LTD. |
发明人 |
OZAKI, YOSHITOMO;TAKAHASHI, JUN-ICHI;YAMASHITA, YU;OHARA, HIDEKI |
分类号 |
C01F5/12 |
主分类号 |
C01F5/12 |
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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