石煤提钒的浮选工艺及吸附机理  

Flotation technology and adsorption mechanism of vanadium extraction from stone coal

作　　者：孙伟[1] 王丽[1] 曹学锋[1] 刘润清[1] 徐龙华[1] 韩海生[1] 

机构地区：[1]中南大学资源加工与生物工程学院,长沙410083

出　　处：《中国有色金属学报》2012年第7期2069-2074,共6页The Chinese Journal of Nonferrous Metals

基　　金：国家"十二五"科技支撑计划资助项目(2012BAB07B05)

摘　　要：针对传统石煤提钒工艺中钒回收率低、环境污染严重等问题,在工艺矿物学研究的基础上,采用浮选的方法对含钒石煤矿进行条件实验和闭路实验,设计出提钒浮选流程,并利用分子动力学模拟研究捕收剂分子在矿物解理面的吸附过程。结果表明:石煤中主要含钒矿物为钒云母,主要的脉石矿物为石英;通过闭路浮选实验,得到了五氧化二钒品位为3.20%(质量分数)、回收率为74.50%的钒精矿;捕收剂分子容易在钒云母(001)面发生吸附,而在石英(001)面几乎不吸附,从而实现了石煤中钒云母和石英的浮选分离。In order to avoid the problems of pollution and low recovery in the conventional process,the flotation was adopted in the treatment of stone coal containing vanadium before leaching on the basis of mineralogical analysis.The proper flotation route was proposed based on condition experiments and closed-circuit test.The method of molecular dynamics simulation was used to study the adsorption process of the collector on roscoelite and quartz,providing a fundamental understanding of the flotation mechanism.The results show that the primary vanadium mineral in stone coal is roscoelite,while the main gangue is quartz.Roscoelite concentrate is eventually obtained with V2O5 grade of 3.20%（mass fraction） and the recovery of 74.50% by a flotation closed-circuit process.The collector is easy to be adsorbed on the surface of roscoelite（001）,while hardly on that of quartz（001）,which leads to the flotation separation of roscoelite and quartz in stone coal.

关 键 词：石煤 钒云母 浮选 分子动力学模拟 

分 类 号：TD923[矿业工程—选矿]