Ore genetic characterization of a copper-cobalt deposit in Xinjiang and its effect on grinding and beneficiation
In order to find out the ore genetic characteristics of a copper-cobalt deposit in Xinjiang and provide theoretical guidance for the design of subsequent beneficiation process,the ore genetic characteristics of the deposit are studied by means of electron probe,automatic mineral analysis system and X-ray diffractometer.The results show that the metal minerals in the ore are mainly chalcopyrite,arsenopyrite-cobaltite series minerals and pyrite.The element Cu in the ore occurs in chalcopyrite,93.30%of Co element occurs in arsenopyrite-cobaltite series minerals,and the remaining 6.70%occurs in pyrite.The particle size of chalcopyrite and arsenopyrite-cobaltite series minerals is mainly medium-fine(0.010-0.300 mm).Under the grinding fineness of-0.074 mm accounting for 70%,the target minerals are dissociated to a certain extent,but there are still some intergrowths.In order to reduce the grinding cost,ensure the recovery rate and concentrate quality,it is suggested to adopt the beneficiation process of total sulfide flotation under the grinding fineness,and then the separation of copper and cobalt after the regrinding of the rough concentrate;the occurrence characteristics of Co indicate that the trend of As and Co elements in the flotation process is the same,which will cause As element excessive in the cobalt concentrate.By studying the ore genetic characteristics of a copper-cobalt deposit in Xinjiang,this paper points out the mineralogical factors affecting grinding and beneficiation,which has theoretical significance for the subsequent mineral processing.
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