新型强磁选组合设备的研发及应用

对弱磁性矿物,由于其嵌布粒度的不同,单一种类的磁选机分选粒度范围比较窄,因此很难实现高效分选。研发了新型自助式干法永磁强磁选机、自助式湿法永磁强磁选机以及宽梯度立环强磁选机,通过强磁选组合设备对不同粒级的矿物进行分级磁选。国内某原矿品位为22.44%的碳酸锰矿石采用自助式干法永磁强磁选机、自助式湿法永磁强磁选机和宽梯度立环强磁选机进行分选,获得总精矿产率为67.98%,精矿品位为31.65%,精矿回收率为95.87%,总尾矿品位为2.90%的分选指标。对非洲某原矿铁品位为42.36%的铁矿石进行了选矿研究,分别釆用自助式干法永磁强磁选机、自助式湿法永磁强磁选机和宽梯度立环强磁选机进行分选,获得总精矿产率为53.41%,总精矿品位为64.09%,总精矿回收率为80.83%,总尾矿品位为17.44%的指标。工业试验结果证明该强磁选组合设备对扩大弱磁性矿物的分选粒级范围,具有很好的应用推广价值。

Development and Application of New Type Combined High Intensity Magnetic Separators

Because of the different dissemination size and short range of single type magnetic separator,developed new type self-service dry-type high intensity permanent magnetic separator,self-service wet-type high intensity permanent magnetic separator and wide-gradient vertical-ring high-intensity magnetic separator.By combining these three high intensity magnetic separators,can classification-magnetic separate different size minerals.A manganese carbonate ore with the grade of 22.44％ from an underground mine at home which were processed by self-service dry-type high-intensity permanent magnetic separator,self-service wet-type high-intensity permanent magnetic separator and wide-gradient vertical-ring high-intensity magnetic separator,respectively,resulting in a total concentrate yield of 67.98％,a total concentrate grade of 31.16％ with a recovery of 95.87％ and a total tailings grade of 2.90％.An iron ore from Africa with the grade of 42.36％ which were processed with self-service dry-type high-intensity permanent magnetic separator,self-service wet-type high-intensity permanent magnetic separator and wide-gradient vertical-ring high-intensity magnetic separator,respectively,resulting in a total concentrate yield of 53.41％,a total concentrate grade of 64.09％ with a total recovery of 80.83％,and a total tailings grade of 17.44％.The application practices show that this combined high intensity magnetic separators can enlarge the range of separation size fraction and have the value of popularization and application.