摘要
采用高梯度磁选和离心机重选回收磁铁矿选矿尾矿中的赤铁矿。结果表明,当磁场强度为800 k A/m、磁介质为Φ2 mm棒介质、脉动冲次为200 r/min时,一次磁选精矿品位为31.2%,精矿回收率为84.44%;将一次磁选精矿细磨至-0.045 mm粒级占90%,采用高梯度磁选-离心机重选工艺,当离心机转鼓转速为400 r/min、补加水量为2 000 L/min时,最终铁精矿品位为60.07%,回收率为43.89%。
High gradient magnetic separation( HGMS) and centrifuge gravity separation( CGS) were introduced to recover hematite from magnetite tailings. The results show that,using rod-shaped magnetic media of 2 mm in diameter,a primary magnetic separation concentrate with iron grade and recovery respectively as 31. 2% and 84. 44% was obtained under a magnetic field strength of 800 k A/m and a pulsating frequency of 200 r/min. Then,the rough concentrate was reground to a fineness of- 0. 045 mm 90% and treated with HGMS-CGS with rotational speed for centrifugal drum at 400 r/min and replenishing water quantity at 2 000 L/min,resulting in a final iron concentrate with60. 07% Fe grade at 43. 89% recovery.
出处
《矿冶工程》
CAS
CSCD
北大核心
2016年第5期60-63,共4页
Mining and Metallurgical Engineering
关键词
磁铁矿选矿尾矿
磁选
重选
铁精矿
磁铁矿
赤铁矿
tailings from magnetite processing
magnetic separation
gravity separation
iron concentrate
magnetite
hematite
