某低品位难选菱铁矿分级磁化焙烧试验研究
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摘要
针对回转窑磁化焙烧过程中细粒级粉矿存在的容易"结圈"以致焙烧作业率偏低的问题,对某低品位难选菱铁矿进行了分级闪速磁化焙烧试验研究。结果表明,将原矿TFe品位24.68%的菱铁矿筛分成块矿与粉矿两种产品,采用块矿回转窑焙烧、粉矿闪速焙烧的联合焙烧工艺,可获得磁选精矿产率33.66%、TFe品位60.91%、铁回收率83.07%的选矿指标。
In the process of magnetizing roasting with rotary kiln, the fine-granulated ore powder may facilitate the formation of deposits, resulting in the low efficient roasting operation. To solve this problem, the size classification-magnetizing roasting tests were conducted for the beneficiation of a refractory and lean siderite with TFe grade of 24.68%. The raw ore was screened to obtain two products, a bulk ore and a powdered ore, which were thereafter treated correspondingly by rotary kiln roasting and flash-roasting approaches respectively. After the magnetic separation, an iron concentrate was obtained with a yield of 33.66%, and TFe grade and recovery of 60.91% and 83.07% respectively.
In the process of magnetizing roasting with rotary kiln, the fine-granulated ore powder may facilitate the formation of deposits, resulting in the low efficient roasting operation. To solve this problem, the size classification-magnetizing roasting tests were conducted for the beneficiation of a refractory and lean siderite with TFe grade of 24.68%. The raw ore was screened to obtain two products, a bulk ore and a powdered ore, which were thereafter treated correspondingly by rotary kiln roasting and flash-roasting approaches respectively. After the magnetic separation, an iron concentrate was obtained with a yield of 33.66%, and TFe grade and recovery of 60.91% and 83.07% respectively.
引文
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[8] 李家林,余永富,陈雯,等.大西沟菱铁矿粉闪速焙烧最佳粒度试验研究[J].矿冶工程,2016,36(8):26-29.
[9] 张汉泉,高王杰,蔡祥.硫酸渣磁化焙烧过程中铁的转化规律及分离试验研究[J].矿冶工程,2018(4):41-44.
[2] 付向辉,毛拥军,薛生晖.大型工业磁化焙烧回转窑结圈研究及预防控制[J].有色金属(选矿部分),2013(s1):236-239.
[3] 叶匡吾.回转窑结圈的防止和消除[J].烧结球团,1998(6):32-34.
[4] 张汉泉.大冶铁矿难选氧化铁矿多级循环流态化磁化焙烧工艺及机理研究[D].武汉:武汉理工大学资源与环境工程学院,2007.
[5] 任亚峰.细粒红铁矿闪速磁化焙烧研究[D].武汉:武汉理工大学资源与环境工程学院,2006.
[6] 庞永莉.菱铁矿流态化磁化焙烧技术的开发与研究[D].西安:西安建筑科技大学材料科学与工程学院,2006.
[7] 王建英,张新龙,张铁柱.固阳褐铁矿磁化焙烧-磁选扩大实验研究[J].矿冶工程,2017(4):82-85.
[8] 李家林,余永富,陈雯,等.大西沟菱铁矿粉闪速焙烧最佳粒度试验研究[J].矿冶工程,2016,36(8):26-29.
[9] 张汉泉,高王杰,蔡祥.硫酸渣磁化焙烧过程中铁的转化规律及分离试验研究[J].矿冶工程,2018(4):41-44.