摘要
对铜溶剂萃取过程污物的生成机理进行了研究。结果表明 ,浸出液pH值、有机相与水相比例 (O A)是影响萃取污物量的主要因素。萃取过程中 ,污物量随萃取pH值升高而增加 ,随相比增大而减少。浸出液中Fe3 +、Mg2 +等离子、微细气泡和悬浮微粒是生成萃取污物的主要原因。当pH >2 .5时 ,Fe3 +发生一系列的水解与络合作用 ,生成多核羟基络离子或Fe SO4络合物 ;而FeOH2 +、Fe2 (OH) 24+等络离子还可能发生多聚反应 。
The forming mechanism of filth in copper solvent extraction has been investigated. It is indicated that the pH of leaching solution and the ratio of phases (O/A) were the main factors to effect the amount of filth in extraction. The amount of filth in extraction was increased with the increase of pH and was reduced with the increase of the phase ratio. The Fe 3+, Mg 2+, minuteness air bubble and suspend particulate in leaching solution were important conditions forming the filth in extraction. A series of hydrolytic and complex reactions took place due to Fe 3+ when pH>2.5 to form polyhydric ions or Fe-SO 4 complex compounds. Then the complex-ions of FeOH 2+, Fe 2(OH) 2 4+ occurred by poly-reactions and then formed the emulsion. It is shown from the results of Zeta potential that charged liquid-beads and charged ions may absorb anti-charge ions and get together.
出处
《矿冶工程》
CAS
CSCD
北大核心
2002年第2期89-92,共4页
Mining and Metallurgical Engineering
基金
高等学校骨干教师资助计划资助 (教技司 [2 0 0 0 ] 65号 )
关键词
萃取
污物
ZETA电位
炼铜
copper
extraction
filth
mechanism
Zeta potential
