降低莲花山Ph3矿层磷矿反浮选磷酸用量的试验研究  

Experimental study on reducing phosphoric acid dosage in reverse flotation of phosphate ore layer Ph3in Lianhuashan Mine

作　　者：李艳[1] 黄友良[1] LI Yan;HUANG Youliang(Institute of Geology and Mines of Sinochem,Zhuozhou Hebei 072754,China)

机构地区：[1]中化地质矿山总局地质研究院,河北涿州072754

出　　处：《化工矿物与加工》2020年第11期21-23,共3页Industrial Minerals & Processing

摘　　要：湖北省莲花山Ph3矿层有用矿物主要为磷灰石,脉石矿物主要为石英、白云石等。该矿正浮选在碱性介质中进行,反浮选在弱酸性介质中进行,因正反浮选两个循环酸碱度相差过大,造成介质调整剂用量较大。针对以上问题,采用硫酸替代部分磷酸,系统地研究了硫磷混酸在反浮选中对精矿指标的影响和作用机理,结果表明:当硫磷混酸的配比(硫酸∶磷酸)为3时,精矿的产率、品位和回收率等指标均较好;相比于常用的硫磷混酸配比为1.8,该方法能节约成本约17.18元/t精矿。若将该方法在生产中推广和应用,不仅能获得显著的经济效益,还能降低尾矿水中磷酸的排放量,减少环境污染,保护生态环境。The valuable mineral of phosphate ore layer Ph3in Lianhuashan Mine,Hubei Province is mainly apatite and the main gangue minerals are quartz and dolomite.The ore was usually processed by direct flotation with alkaline medium followed by reverse flotation with weak acidic medium.Because of the big difference of pH value between the two flotation circuits,the dosage of the pH regulators was a big number.In order to solve this problem,using H2SO4 to replace part of H3PO4in the reverse flotation of the ore,the systemic study on the effect and mechanism of the mixture of acids on the concentrate was carried out.The results show that the flotation performances such as weight yield,grade and recovery of the concentrate at the ratio of 3(H2SO4to H3PO4)were better than the ratio of 1.8(H2SO4to H3PO4).With the process,the operating cost for the concentrate could be reduced by about 17.18yuan/ton.If the method is applied in beneficiation production,the plant will benefit significantly,in addition,the reduction of H3PO4 emission to the tailings water as pollutants to its environment as well as protection of ecological conditions are available.

关 键 词：胶磷矿 浮选 pH调整剂 磷酸 硫酸 

分 类 号：TD971[矿业工程—选矿]