发明名称 |
Method for processing zinc silicate-containing zinc crude material |
摘要 |
<p>Provided are methods for processing a zinc silicate-containing zinc crude material capable of quickly precipitating eluted silica in a solid-liquid separable form in a strong acid condition at simple facilities in dissolving the zinc silicate-containing zinc crude material in a leaching tank filled with a sulfuric acid-acidified solution to extract zinc. One method for processing a zinc silicate-containing zinc crude material is characterized by maintaining a sulfuric acid-acidified solution at the following conditions of the liquid temperatures, the pH and the SiO2 concentration in extracting zinc from a zinc silicate-containing zinc crude material in a sulfuric acid-acidified leaching tank: liquid temperature (t) : t >/= 75 DEG C pH : 1.5 </= pH </= 3.0 SiO2 concentration : SiO2 </= 5.0 g/liter Another method for processing a zinc silicate-containing zinc crude material is characterized by feeding a composition containing silica which is preferably a leaching residue produced at the hydrometallurgical zinc refining step into a sulfuric acid-acidified solution contained in a sulfuric acid-acidified leaching tank so that the amount of silica contained in the composition described above satisfies the following equation (1) in extracting zinc from the zinc silicate-containing zinc crude material in the leaching tank described above: <MATH></p> |
申请公布号 |
AU710154(B2) |
申请公布日期 |
1999.09.16 |
申请号 |
AU19970036886 |
申请日期 |
1997.09.05 |
申请人 |
MITSUI MINING & SMELTING CO., LTD. |
发明人 |
SEIJI IKENOBU;KIMIHIRO SHIMOKAWA |
分类号 |
C22B3/08;C22B19/00;C22B19/28;(IPC1-7):C01B33/20 |
主分类号 |
C22B3/08 |
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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