Dry magnetic separation experiment on converter steel slag of small particle size based on new roll separator
SHI Chang-liang1,ZHANG Bing-hao1,SUN Xiao-peng1,LI Sha2,LI Yong-jun3
(1. School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, China 2. Analysis and Testing Center, Henan Jiyuan Iron and Steel (Group) Co., Ltd., Jiyuan 454650, Henan, China 3. Research and Development Engineering, Jingyuan Permanent Magnetic Separator Co., Ltd., Shangluo 726000,Shaanxi, China)
Abstract:A multi-stage roll separator was designed for converter steel slag of small particle size,which was of low-grade and different magnetite iron minerals. Experiments were carried out for single-stage magnetic roller roughing and multi-stage magnetic roller concentrating under different grind size. The impacts of magnetic roller rotation frequency and separation distance on the concentrate grade and recovery of each particle size steel slag were compared. The results show that concentrate grade by multi-stage magnetic roller is significantly higher than the single-stage magnetic roller roughing,although the recovery rate is slightly lower. Magnetic roller rotation frequency obviously affects the recovery rate,and,separation distance is significantly higher at both sides of the value. Better performance of magnetic separator can be attained with the smaller particle size. Grinding fineness of <0.3 mm accounting for 90% can increase the concentrate grade by about 32 percentage points compared with the raw ore.
史长亮,张兵豪,孙小朋,李 沙,李勇军. 基于新型辊式机的细粒转炉钢渣干法磁选试验[J]. 钢铁, 2015, 50(12): 105-109.
SHI Chang-liang,ZHANG Bing-hao,SUN Xiao-peng,LI Sha,LI Yong-jun. Dry magnetic separation experiment on converter steel slag of small particle size based on new roll separator. Iron and Steel, 2015, 50(12): 105-109.
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