和尚桥选矿厂中碎大块干选抛尾改造实践  

The Reformation Practice of Medium Crushing Products Using Dry Discarding Tailing Process in Heshangqiao Concentrator

作　　者：曹兵 邹宗彬 Cao Bing;Zou Zongbin(Masteel Group of Nanshan Mining Company,Maanshan 243000,China)

机构地区：[1]马钢集团南山矿业公司,安徽马鞍山243000

出　　处：《金属矿山》2020年第7期111-114,共4页Metal Mine

摘　　要：针对马钢和尚桥选矿厂入选矿石品位低、选矿比大、选矿成本高、尾矿浓密机长期超负荷运行的问题,进行了中碎产品大块干式预选抛尾工艺研究与生产工艺改造。结果表明:①选用CTDG1220型磁滑轮对现场中碎产品进行干式预选抛尾,可抛出产率12.38%、全铁品位10.31%、磁性铁品位0.80%的废石;干抛精矿全铁品位20.00%、磁性铁品位7.29%、全铁回收率达93.21%、磁性铁回收率达98.42%,后续作业矿石铁品位提高了1.20个百分点。②细碎及其后续系统的负荷显著下降,有利于后续系统的稳定运行;每年产出的74.28万t废石可作为砂石骨料销售。③新增系统年创造经济效益3728.28万元。The process study and production process reformation of dry pre-discarding tailings of medium crushing production were conducted aiming at the problems of the low grade of feeding,high concentration ratio,high processing cost and long-term overload operation of the tailing thickener in Heshangqiao concentrator.The results showed that:①After the pre-discarding tailing with magnetic pulley of CTDG1220 type for on site medium crushing production,the tailing containing 10.31%TFe and 0.80%mFe can be discarded with a yield of 12.38%,and the concentrate containing 20.00%TFe and7.29%mFe can be obtained with a TFe recovery rate of 93.21%and a mFe recovery rate of 98.42%.The grade of the final cocentrate is 1.20 percent point higher in the later operation.②The load of the fine crushing and subsequent system can be reduced significantly,which is beneficial to the stable operation of the subsequent system.In addition,0.7428 million tons waste rock can be sold as sandstone aggregate every year.③The annual revenue generated by additional system can reach37.28 million yuan.

关 键 词：磁铁矿 大块干式预先抛尾 磁滑轮 砂石骨料 经济效益 

分 类 号：TD921.7[矿业工程—选矿]