发明名称 |
PROCESS FOR STABILIZATION OF ARSENIC |
摘要 |
<p>The present invention is a method to remove arsenic from arsenic-containing materials (10) which is roasted (14) to form an offgas (18) and a roasted arsenic-containing material (22). An oxygen containing gas (26) is contacted with the arsenic-containing material. The offgas is subjected to solids collection (30) to form solids (34) and an offgas (38) for scrubbing (42). The solids (34) are combined with the roasted arsenic-containing material (22) before solubilization (46). The offgas (38) is subjected to scrubbing (42) with a scrubbing solution (50) to form a scrubbed offgas (58). The scrubbing solution is a portion of a pregnant leach solution (54). The scrubbed offgas is treated to remove sulfur dioxide (62). During solubilization arsenic oxides, ferric sulfates and ferric arsenates are dissolved to form a product slurry (62). The product slurry is subjected to liquid/solid separation (66) to form a leach residue (70) and a pregnant leach solution (54). A portion of a treated solution (74) is combined with water (118) to form a wash solution (78). The wash solution is used during liquid/solid phase separation to wash the leach residue to remove arsenic.</p> |
申请公布号 |
WO9731861(A1) |
申请公布日期 |
1997.09.04 |
申请号 |
WO1997US03331 |
申请日期 |
1997.02.20 |
申请人 |
HAZEN RESEARCH, INC. |
发明人 |
DOWNEY, JEROME, P.;MUDGETT, HARRY |
分类号 |
C01G49/00;C22B1/06;C22B30/04;(IPC1-7):C01G28/00;C22B30/00 |
主分类号 |
C01G49/00 |
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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