摘要
研究机械活化对黄铜矿粒度参数、显微组织和浸出性能的影响,并探讨活化过程中团聚和集聚的发生和转变。结果表明,研磨8 h前黄铜矿的团聚与显微组织变化互不影响;然而,研磨8 h后晶粒尺寸的降低达到极限,显微组织变化停滞,使得团聚被集聚取代。浸出实验结果表明,机械活化能显著提高黄铜矿的浸出性能,而集聚对浸出的阻碍作用远强于团聚。经4 h酸浸实验后,活化8 h的矿样获得最高铜浸出率,其值为80.13%。
The effect of mechanical activation on the granulometric parameters,microstructure,and leaching efficiency of chalcopyrite was evaluated,and the occurrence/transition of agglomeration and aggregation was discussed.The results showed that in 8 h of milling treatment,the agglomeration and the microstructure did not affect each other.However,with prolonging milling time,the crystallite size tended to reach a saturation value,and the stagnating microstructural changes led to the replacement of agglomeration by aggregation.The leaching results indicated that the mechanical activation can strongly enhance the reactivity of chalcopyrite and the hindering effect of aggregation on leaching was considerably greater than that of agglomeration.Consequently,after 8 h of milling,the maximum Cu leaching rate of 80.13%was achieved after 4 h of acid leaching.
作者
赵素兴
王改荣
杨洪英
陈国宝
丘学民
Su-xing ZHAO;Gai-rong WANG;Hong-ying YANG;Guo-bao CHEN;Xue-min QIU(School of Metallurgy,Northeastern University,Shenyang 110819,China)
基金
the Special Fund for the National Natural Science Foundation of China(U1608254)
the National Key R&D Program of China(2018YFC1902002).
关键词
黄铜矿
机械活化
团聚
集聚
浸出
chalcopyrite
mechanical activation
agglomeration
aggregation
leaching
