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    • 58. 发明授权
    • Process for the flotation of base metal sulfide minerals in acid,
neutral or mildly alkaline circuits
    • 在酸性,中性或弱碱性电路中浮选碱金属硫化矿物的方法
    • US4556482A
    • 1985-12-03
    • US641659
    • 1984-08-17
    • D. R. Nagaraj
    • D. R. Nagaraj
    • B03D1/012B03D1/14
    • B03D1/012B03D2201/02B03D2203/02
    • A process for the beneficiation of copper sulfide mineral values from base metal sulfide ores with selective rejection of pyrite and/or pyrrhotite or other gangue minerals at pH values of below about 10.0 by froth flotation is disclosed. The process includes the use of a new and improved collector which at pH values below 10.0 exhibits unexpectedly high collector activity for copper sulfide minerals and selectively rejects pyrite and other gangue sulfides or non-sulfides. The collector for copper mineral values for use in the process comprises at least one hydrocarboxycarbonyl thiourea compound having the formula: ##STR1## wherein R.sup.1 is hydrogen or R.sup.2 ; R.sup.2 is C.sub.1 -C.sub.8 alkyl and R.sup.3 is C.sub.1 -C.sub.6 alkyl or phenyl. In a preferred embodiment of the present invention, froth flotation is conducted under acid pH conditions by adjusting the pH of the flotation slurry with sulfuric acid. The process provides excellent metallurgical recoveries of copper sulfide mineral values of high grade at a substantial reduction in lime consumption and reagents costs associated with prior art flotation separation methods.
    • 公开了一种通过泡沫浮选在pH值低于约10.0的碱金属硫化物矿选择性排除黄铁矿和/或磁黄铁矿或其他脉石矿物的硫化铜矿物值的方法。 该方法包括使用在pH值低于10.0的新的和改进的收集器对于硫化铜矿物显示出意想不到的高收集器活性,并选择性地排除黄铁矿和其它ang石硫化物或非硫化物。 用于该方法的铜矿物价值的收集器包含至少一种具有下式的羧基羰基硫脲化合物:其中R 1是氢或R 2; R2是C1-C8烷基,R3是C1-C6烷基或苯基。 在本发明的优选实施方案中,通过用硫酸调节浮选浆液的pH,在酸性pH条件下进行泡沫浮选。 该方法提供了高等级的硫化铜矿物质的极好的冶金回收率,显着降低了石灰消耗量和与现有技术浮选分离方法相关的试剂成本。