摘要
新疆某镜铁矿石含TFe 35%,P 0.021%,S 0.012%,矿石中部分镜铁矿以细粒和微细粒的状态与隐晶质细粒的碳酸盐混杂构成细粒隐晶质结构,属难选矿石。对其进行了实验室磁化焙烧弱磁选试验。结果表明,将-2 mm原矿与煤粉按100∶12质量比(煤配比100∶12)混合,在焙烧温度800℃,焙烧时间为75 min的条件下焙烧,焙烧后细磨至-0.074 mm占90%,在磁场强度均为120 kA/m条件下进行两段弱磁选,可获得铁精矿品位65.95%、回收率77.70%的技术指标。该工艺技术为我国镜铁矿的开发利用提供了参考。
The iron content in a Xinjiang specularite was 35%, and the impurities of phosphorus and sulfur were 0.024%and 0.011%respectively.Part of the specularite occurred as fine and mi-cro-fine, and formed fine cryptocrystalline structure with the cryptocrystalline fine carbonate .La-boratory tests of magnetic roasting -low intensity magnetic separation were carried out with the run-of-mine.The sample（-2mm） was mixed with coal powder with a mass ratio of 100：12 and roasted at temperature of 800 ℃for 75 min.The as-roasted product was ground to -0.074 mm 90%, and then separated twice by low intensity magnetic separator at 120 kA/m.A concentrate with iron grade of 65 .95%and recovery of 77 .70%was obtained .
出处
《矿产保护与利用》
2014年第3期18-22,共5页
Conservation and Utilization of Mineral Resources
基金
河北省自然基金(编号:E2013209309)
关键词
镜铁矿
磁化焙烧
正交试验
磁选
specularite
magnetizing roasting
orthorhombic experiment
magnetic separation
