摘要:
西北某铁选厂处理的铁矿石含铁33.77%,主要有用矿物为镜铁矿、褐铁矿、菱铁矿,嵌布粒度粗细不均,属于国内典型的复杂难选矿石。为了回收-15 mm粒级粉矿,采用了SLon-2500立环脉动高梯度磁选机,试验结果表明,立环强磁粗选精矿品位达到46.70%,已经达到强磁精矿设计指标,可作为最终强磁精矿;扫选尾矿品位达到19.00%,可以作为尾矿抛除;-0.02 mm含量占95.90%的细颗粒采用立环强磁进行粗选,所得精矿品位及回收率分别达到42.16%、53.12%,尾矿品位达到19.76%,精矿品位提高了13.21个百分点。 SLon-2500立环脉动高梯度磁选机能够对该选厂铁矿物进行全粒级回收。
Abstract:
The refractory iron ore with TFe grade of 33 . 77% form a northwest dressing plant con-tains useful iron minerals as specularite, limonite, siderite, and the size distribution of iron ore is nonuniform. SLon-2500 vertical ring pulsating high gradient magnetic separator was used to sepa-rate the iron ore of -15 mm. And the results showed that the Fe grade of the magnetic rougher con-centrate is up to 46. 70%,which met design index for the rougher concentrate. The scavenging con-centrate with Fe grade of 19. 00% was removed as tails. The Fe grade and recovery of magnetic rougher concentrate of fines were 42. 16% and 53. 12% respectly,and the Fe grade of concentrate increased by 13. 21 percentage points,and the Fe grade of tails was 19. 76%. SLon-2500 Magnetic Separator can be use to separate the whole size iron ore.
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