摘要
采用重介质旋流器对湖南WO_(3)品位0.31%、CaF_(2)品位9.23%、CaCO_(3)品位39.36%的某高碳酸钙型低品位白钨矿进行了预抛试验。-15+0.5mm全粒级以及分粒级预抛试验结果表明,全粒级预抛与分粒级预抛的差异很小;在介质密度为2.37g/cm^(3)的条件下预抛,获得预抛轻产品作业产率为46.24%,WO_(3)作业回收率为5.15%、CaF2作业回收率为27.17%、CaCO_(3)作业回收率为74.72%的良好指标。以BK418作为白钨捕收剂,考察了重介质预抛前后对白钨常温浮选的影响。浮选试验结果表明,重介质预抛后,获得常温钨精矿中WO_(3)品位为6.54%,比预抛前提高了3.77个百分点;WO_(3)回收率为81.45%,比预抛前提高了2.61个百分点。重介质预抛大幅降低了入磨矿量,提高了浮选指标,节约了尾矿库库容,同时预抛轻产品可以作为建材原料,增加了尾矿附加值。
A heavy medium cyclone was used to pre-throw a low-grade scheelite with high calcium carbonate from Hunan,in which the grade of WO_(3)is 0.31%,CaF_(2)is 9.23%and CaCO_(3)is 39.36%.The results of-15+0.5mm full size and fraction size pretreatment test show that there is little difference between full size pretreatment and fractional size pretreatment.Under the condition of 2.37g/cm^(3) heavy medium pretreatment,the light product yield is 46.24%,WO_(3)recovery is 5.15%,CaF2recovery is 27.17%and CaCO_(3)recovery is 74.72%.Using BK418as collector of scheelite,the effects of heavy medium pre-throwing on scheelite flotation at room temperature were investigated.Results of flotation tests show that the tungsten concentrate containing 6.54%WO_(3)at ambient temperature is obtained after heavy medium pre-throwing,which is 3.77percentage points higher than that before pre-throwing.The recovery of WO_(3) is 81.45%,which is 2.61percentage points higher than that before pre-throwing.The heavy medium prethrowing greatly reduces the grinding amount,improves the flotation index,saves the storage capacity of the tailings reservoir,and simultaneously the pre-thrown light product can be used as a building material raw material,thereby increasing the added value of the tailings.
作者
刘书杰
王中明
刘方
肖巧斌
LIU Shujie;WANG Zhongming;LIU Fang;XIAO Qiaobin(BGRIMM Technology Group,Beijing 100160,China;State Key Laboratory of Mineral Processing Science and Technology,Beijing 102628,China)
出处
《有色金属（选矿部分）》
CAS
北大核心
2021年第2期69-76,共8页
Nonferrous Metals（Mineral Processing Section）
关键词
重介质预抛
白钨矿
碳酸钙
浮选
heavy medium pretreatment
scheelite
calcium carbonate
flotation
