改性水玻璃在含高岭土复杂萤石浮选中的综合应用  

Comprehensive Application of Modified Sodium Silicate in Flotation of Complex Fluorite Containing Kaolinite

作　　者：窦源东 张全明 唐俊杰 吴凯 DOU Yuandong;ZHANG Quanming;TANG Junjie;WU Kai(Yantai Gold College,Yantai 265401,Shandong,China;Shandong Langjing New Energy Technology Co.,Ltd.,Jinan 250002,China;Zhaoyuan Beijie Gold Mine Co.,Ltd.,Yantai 265400,Shandong,China)

机构地区：[1]烟台黄金职业学院,山东烟台265401 [2]山东朗净新能源技术有限公司,济南250002 [3]招远市北截金矿有限公司,山东烟台265400

出　　处：《有色金属（选矿部分）》2022年第5期130-136,共7页Nonferrous Metals（Mineral Processing Section）

摘　　要：河北某萤石矿中萤石与石英嵌布粒度细,共生关系复杂并含有高岭土,品位低、氧化程度高。生产中采用常规的高碱度水玻璃进行石英抑制,生产技术指标较差,严重影响企业的生存与发展。由于浮选尾矿碱度高,水玻璃等分散剂SS含量高达5 000~7 000 mg/L,回用时又会导致生产指标的恶化。针对上述问题,试验采用两段磨矿,中矿集中返回再磨的流程,精矿浮选流程中抑制剂改用改性水玻璃,有效抑制了细粒石英、长石等细粒脉石矿物。同时,在改性水玻璃的综合作用下,实现了尾矿水SS的快速沉淀,尾矿水可有效返回利用,不会对选矿指标造成影响,最终获得了CaF_(2)品位为97.27%、SiO_(2)含量为1.5%、CaF_(2)回收率为77.68%的萤石精矿产品,提高了精矿质量,为该选厂的实际生产提供了技术支持。Fluorite and quartz in a fluorite ore in Hebei have fine particle size, complex symbiosis and kaolinite, low grade and high oxidation degree.The conventional high alkalinity sodium silicate is used to suppress quartz in the production, and the production technical index is poor, which seriously affects the survival and development of enterprises.Due to the high alkalinity of flotation tailings and dispersants such as sodium silicate, SS content is as high as 5 000-7 000 mg/L,which will lead to the deterioration of production indicators when reused.Aiming at these problems, experiments using two section of grinding, the concentration of middlings was returned again grinding process, using modified sodium silicate ore concentrate in flotation process inhibitors, effectively inhibit the fine grained quartz, feldspar and other fine grained gangue mineral.At the same time, under the comprehensive action of modified sodium silicate, rapid precipitation of SS of tailings water is realized, tailings water can be effectively returned to be used, will not affect the beneficiation index, obtain fluorite concentrate with CaF_(2)grade of 97.27%,SiO_(2)content of 1.5%,CaF_(2)recovery of 77.68%,improve the quality of concentrate.It provides technical support for the actual production of the concentrator.

关 键 词：高岭土 改性水玻璃 萤石 浮选 

分 类 号：TD97[矿业工程—选矿] TD923.14