发明名称 |
RECOVERY OF MOLYBDENUM FROM MOLYBDENUM BEARING SULFIDE MATERIALS BY BIOLEACHING IN THE PRESENCE OF IRON |
摘要 |
<p>The invention relates to a method of recovering molybdenum from a molybde num bearing sulfide material. The material is contacted with a leaching solu tion in the presence of iron compounds and mesophilic or thermophilic iron o xidizing microorganisms and subsequently, a leaching process is performed by controlling the molar ratio of dissolved ferric iron to dissolved molybdenu m. Preferably, a high amount and molar excess of dissolved iron is used. The presence of high concentrations of ferric iron in bioleach solutions allows iron-oxidizing microorganisms to grow and oxidize iron and bioleach molybde nite at dissolved Mo concentrations as high as 4.4 g/L. Organic metabolites were not required for protecting cells from Mo toxicity. Maximum dissolution rates depend on reactor configuration, with agglomerated material simulatin g heap leaching of almost 1% Mo/day, but up to 10.2% Mo/day in suspension/st irred reactor configurations, with rate highly dependent on temperature with in the range of 25°C to 40°C. The ultimate extent of Mo removal from the mol ybdenum bearing sulfide material is 89%. Finally, molybdenum is recovered fr om a leach residue of the leaching process.</p> |
申请公布号 |
CA2658085(A1) |
申请公布日期 |
2008.02.07 |
申请号 |
CA20072658085 |
申请日期 |
2007.07.19 |
申请人 |
H.C. STARCK GMBH |
发明人 |
KUMMER, WOLFGANG;GUTKNECHT, WILFRIED;CLARK, THOMAS R.;OLSON, GREGORY JAMES |
分类号 |
C22B3/18;C22B3/08;C22B34/34 |
主分类号 |
C22B3/18 |
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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