镜铁矿粉矿磁化焙烧-磁选试验研究
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摘要
以甘肃地区镜铁矿粉矿为原料,采用磁化焙烧-弱磁选工艺,研究了焙烧温度、焙烧时间、还原剂用量、磨矿细度、磁场强度等对磁选效果的影响。结果表明,在煤粉用量2%、焙烧温度800℃、焙烧时间60 min条件下焙烧,再在磨矿细度-0.074 mm粒级占85.36%、磁场强度92.16 k A/m条件下磁选,可得到品位为54.95%、回收率为88.92%的弱磁选精矿。
A flowsheet of magnetizing roasting-low intensity magnetic separation( LIMS) was adopted to treat a fine specularite ore from Gansu,and the influence of processing parameters including roasting temperature,roasting time,coal dosage,grinding fineness and magnetic field intensity on separation efficiency was investigated. The results show that with coal powder dosage of 2% and roasting process at 800 ℃ for 60 min,with grinding fineness of- 0. 074 mm85. 36% and beneficiation at a magnetic field intensity of 92. 16 k A / m,a LIMS iron concentrate with iron grade and recovery of 54. 95% and 88. 92%,respectively,can be prepared.
A flowsheet of magnetizing roasting-low intensity magnetic separation( LIMS) was adopted to treat a fine specularite ore from Gansu,and the influence of processing parameters including roasting temperature,roasting time,coal dosage,grinding fineness and magnetic field intensity on separation efficiency was investigated. The results show that with coal powder dosage of 2% and roasting process at 800 ℃ for 60 min,with grinding fineness of- 0. 074 mm85. 36% and beneficiation at a magnetic field intensity of 92. 16 k A / m,a LIMS iron concentrate with iron grade and recovery of 54. 95% and 88. 92%,respectively,can be prepared.
引文
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[2]谢承祥,李厚民,王瑞江,等.中国已查明的铁矿资源的结构特征[J].地质通报,2009,28(1):80-84.
[3]苗梁,李国栋,姜永智,等.西北某难选铁矿石选矿试验[J].金属矿山,2013(3):73-76.
[4]罗立群,乐毅.难选铁物料磁化焙烧技术的研究与发展[J].中国矿业,2007,16(3):55-56.
[5]陈起政.镜铁山镜-菱-褐铁矿选矿研究[J].矿冶工程,1988(4):20-23.
[6]朱德庆,李晓波,潘建,等.某低品位高磷赤铁矿磁化焙烧-磁选-酸浸脱磷工艺研究[J].矿冶工程,2015(1):97-100.
[7]刘兴华,罗良飞,刘卫,等.某低品位褐铁矿的选矿工艺研究[J].矿冶工程,2013(4):70-73.
[8]陈泽宗,胡芳,石云良,等.某选铁尾矿磁化焙烧-磁选试验研究[J].矿冶工程,2013(5):71-74.
[9]任亚峰,余永富.难选红铁矿磁化焙烧技术现状及发展方向[J].金属矿山,2005(11):20-21.
[10]张茂,王东,陈启平,等.云南某褐铁矿磁化焙烧-磁选工艺试验研究[J].矿冶工程,2011(6):51-53.
[11]黄红军,胡岳华,杨帆,等.某复杂难选红铁矿磁化焙烧-磁选工艺及机理研究[J].矿冶工程,2010(6):38-41.
[12]李解,韩腾飞,李保卫,等.赤铁矿微波还原焙烧-弱磁选工艺研究[J].矿冶工程,2014(1):82-86.
[13]罗立群,高远扬,陈雯.提高酒钢焙烧磁选精矿质量的试验研究[J].矿冶工程,2001(1):29-32.