某石墨尾矿再选试验

Secondary Graphite Recycling for Treating Graphite Tailings

为了满足经济建设对石墨的需求,保护我国现有的石墨矿石资源和矿区生态环境,增加社会财富,在对黑龙江萝北某石墨尾矿进行性质分析的基础上,采用浮选工艺进行了石墨再回收试验。结果表明:①该石墨尾矿-0.074 mm占89.48%,固定碳含量为4.98%,石墨单体解离度为75.59%,试样中的石墨为无定形石墨,多以鳞片状或平行状石墨集合体及粒状单体形式存在,具有强非均质性,石墨主要与云母和石英连生。②采用1粗1精—4阶段磨矿5阶段精选—高品位中矿直接返回—低品位中矿1次扫精选后返回流程处理该石墨尾矿,最终获得了固定碳含量为85.65%、回收率为66.22%的石墨精矿,该精矿固定碳含量达到GB3519—83规定的耐火级石墨材料质量标准要求。

In order to meet the needs of economic construction for graphite,protect the graphite resource of our country and the ecological environment in mining area,increase the social wealthy,flotation process was used to recycle graphite based on detailed property analysis of graphite tailings from Heilongjiang.The results showed that：①The particle size of graphite tailings was 89.48％ passing 0.074 mm,contents of fixed carbon was 4.98％,degree of graphite liberation was 75.59％.Graphite from the samples exists in form of amorphism in mainly flaky or parallel aggregation,or monomer grain with strong heterogeneity.Graphite is mainly interlocked with mica and quartz.②Graphite concentrate with 85.65％ fixed carbon,66.22％ recovery was received through the process of one roughing,one cleaning-four stages grinding and five stages concentration-directly return of high grade middling ＋ cleaning return after one scavenging concentrate of low grade middling to the process.The content of fixed carbon can reach the provision of GB3519-83 for fireproof.