安徽褐铁矿的磁化焙烧-磁选工艺
|
摘要
针对安徽某低品位褐铁矿石,采用磁化焙烧-磁选工艺进行了实验研究,对该矿的原矿进行了岩相分析,并对磁化焙烧-磁选工艺参数进行了优化.结果表明,该矿属低磷硫的低品位褐铁矿,褐铁矿与脉石矿物的镶嵌关系较为复杂,结晶水含量高,属难选矿石.对铁品位48.01%的原矿,在850℃、内配煤5%(质量分数)的条件下,磁化焙烧15min,焙烧矿磁化率达到最佳值,褐铁矿几乎全部转化为磁铁矿,这由X射线衍射结果证实.该褐铁矿通过磁化焙烧-磁选工艺可获得品位62.94%、回收率87.99%的铁精矿.
The magnetizing roasting-magnetic separation process of limonite ores from Anhui Province in east China was experimentally studied,which covers determining the mineralogy of raw ores and optimizing the magnetizing roasting-magnetic separation process parameters.It is shown that the limonite ores contain low phosphorus and sulphur and high loss on ignition (LOI);the iron minerals and gangue have complicated occurrence,indicating that the limonite ores are extraordinarily refractory iron ores.Through magnetizing roasting of raw ores assaying 48.01% Fe and blending 5% coal fines at 850℃ for 15min,the best magnetization ratio of roasted iron ores is achieved,where almost limonite is transferred to magnetite.This result was proven by X-ray diffraction.By the magnetizing roasting-magnetic separation process,an iron ore concentrate with 62.94% TFe and 87.99% recovery is produced.
The magnetizing roasting-magnetic separation process of limonite ores from Anhui Province in east China was experimentally studied,which covers determining the mineralogy of raw ores and optimizing the magnetizing roasting-magnetic separation process parameters.It is shown that the limonite ores contain low phosphorus and sulphur and high loss on ignition (LOI);the iron minerals and gangue have complicated occurrence,indicating that the limonite ores are extraordinarily refractory iron ores.Through magnetizing roasting of raw ores assaying 48.01% Fe and blending 5% coal fines at 850℃ for 15min,the best magnetization ratio of roasted iron ores is achieved,where almost limonite is transferred to magnetite.This result was proven by X-ray diffraction.By the magnetizing roasting-magnetic separation process,an iron ore concentrate with 62.94% TFe and 87.99% recovery is produced.
引文
[1]Zhu T.The effect of adding limonite in Baosteel blending ore of sintering.Min Metall Eng,1998,18(Suppl1):126(朱彤.宝钢混匀矿增配褐铁矿对烧结生产的影响.矿冶工程,1998,18(增刊1):126)
[2]Fu J Y,Jiang T,Zhu D Q.Principle ofSintering and Pelletizing.Changsa:Central South University Press,1995:16(傅菊英,姜涛,朱德庆.烧结球团学.湖南:中南大学出版社,1995:16)
[3]Wang Y H.Research on reverse flotation for removal of silicate from limonite.Met Mine,2005(7):37(王毓华.褐铁矿反浮选脱硅新工艺试验研究.金属矿山,2005(7):37)
[4]Jiang T.Application situation of limonite and its laboratory re-search in Cheng Steel.Hebei Metall,2005(1):7(姜汀.褐铁矿的应用现状及承钢的实验室研究.河北冶金,2005(1):7)
[5]Wang Z M,Yang S Y.Research on mineral processing technics of a Russian iron ore.Met Ore Dressing Abroad,2005(9):30(王仲明,杨士勇.俄罗斯某铁矿的选矿工艺研究.国外金属矿选矿,2005(9):30)
[6]Zhang HQ.Experimental study on magnetic roasting-separation of refractory hematite limonite.China Min Mag,2006,15(5):44(张汉泉.难选赤褐铁矿焙烧--磁选试验研究.中国矿业,2006,15(5):44)
[7]Zheng Z L.A few words on reserving limonite.Jiangxi Metall,1998,18(6):36(郑志良.浅谈选别褐铁矿.江西冶金,1998,18(6):36)
[8]Nasr MI,Youssef MA.Optimization of magnetizing reduction and magnetic separation of iron ores by experimental design.ISIJ Int,1996,36(6):631
[9]Kawahara M,Mitsuo T,Shirane Y,et al.Dilute sulphuric-acid leaching of garnierite ore after magnetic-roasting the ore mixed withiron powder.Int JMiner Process,1987,19:285
[10]El-Tawil S Z,Morsi I M,Yehia A.Reductive roasting of ilmen-ite ore.Can Metall Q,1996,35(1):31
[11]Uwadiale G G O O.Magnetizing reduction of iron ores.Miner Process Extr Metall Rev,1992,11(1):1
[12]Zhu J S.Experimental Research and Industrialization of Ore Dressing.Beijing:Metallurgical Industry Press,2004:441(朱俊士.选矿试验研究与产业化.北京:冶金工业出版社,2004:441)
[13]Arinez M,Bisonard E,Flores H,et al.Beneficiation of low-grade iron ores by a reducing roast and magnetic separation.Rev Metall,1982,18(1):45
[14]Liu W L.The application of the magnetite-yield roasting technol-ogy to the treatment of S-As gold concentrate.Gold,2000,21(12):26(刘万灵.缺氧磁化焙烧技术用于处理硫砷金精矿.黄金,2000,21(12):26)
[15]Zhang MJ.Mineral Processing Manual.3rd Volume,3rd Fasci-cule.Beijing:Metallurgical Industry Press,1991:46(张卯均.选矿手册.第3卷,第3分册.北京:冶金工业出版社,1991:46)
[2]Fu J Y,Jiang T,Zhu D Q.Principle ofSintering and Pelletizing.Changsa:Central South University Press,1995:16(傅菊英,姜涛,朱德庆.烧结球团学.湖南:中南大学出版社,1995:16)
[3]Wang Y H.Research on reverse flotation for removal of silicate from limonite.Met Mine,2005(7):37(王毓华.褐铁矿反浮选脱硅新工艺试验研究.金属矿山,2005(7):37)
[4]Jiang T.Application situation of limonite and its laboratory re-search in Cheng Steel.Hebei Metall,2005(1):7(姜汀.褐铁矿的应用现状及承钢的实验室研究.河北冶金,2005(1):7)
[5]Wang Z M,Yang S Y.Research on mineral processing technics of a Russian iron ore.Met Ore Dressing Abroad,2005(9):30(王仲明,杨士勇.俄罗斯某铁矿的选矿工艺研究.国外金属矿选矿,2005(9):30)
[6]Zhang HQ.Experimental study on magnetic roasting-separation of refractory hematite limonite.China Min Mag,2006,15(5):44(张汉泉.难选赤褐铁矿焙烧--磁选试验研究.中国矿业,2006,15(5):44)
[7]Zheng Z L.A few words on reserving limonite.Jiangxi Metall,1998,18(6):36(郑志良.浅谈选别褐铁矿.江西冶金,1998,18(6):36)
[8]Nasr MI,Youssef MA.Optimization of magnetizing reduction and magnetic separation of iron ores by experimental design.ISIJ Int,1996,36(6):631
[9]Kawahara M,Mitsuo T,Shirane Y,et al.Dilute sulphuric-acid leaching of garnierite ore after magnetic-roasting the ore mixed withiron powder.Int JMiner Process,1987,19:285
[10]El-Tawil S Z,Morsi I M,Yehia A.Reductive roasting of ilmen-ite ore.Can Metall Q,1996,35(1):31
[11]Uwadiale G G O O.Magnetizing reduction of iron ores.Miner Process Extr Metall Rev,1992,11(1):1
[12]Zhu J S.Experimental Research and Industrialization of Ore Dressing.Beijing:Metallurgical Industry Press,2004:441(朱俊士.选矿试验研究与产业化.北京:冶金工业出版社,2004:441)
[13]Arinez M,Bisonard E,Flores H,et al.Beneficiation of low-grade iron ores by a reducing roast and magnetic separation.Rev Metall,1982,18(1):45
[14]Liu W L.The application of the magnetite-yield roasting technol-ogy to the treatment of S-As gold concentrate.Gold,2000,21(12):26(刘万灵.缺氧磁化焙烧技术用于处理硫砷金精矿.黄金,2000,21(12):26)
[15]Zhang MJ.Mineral Processing Manual.3rd Volume,3rd Fasci-cule.Beijing:Metallurgical Industry Press,1991:46(张卯均.选矿手册.第3卷,第3分册.北京:冶金工业出版社,1991:46)
目录