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直接还原焙烧—弱磁选回收河南某金冶炼渣中铁
引用本文:王威,柳林,冯安生,刘红召,高照国.直接还原焙烧—弱磁选回收河南某金冶炼渣中铁[J].金属矿山,2015,44(12):169-172.
作者姓名:王威  柳林  冯安生  刘红召  高照国
作者单位:1.中国地质科学院郑州矿产综合利用研究所,河南 郑州 450006;2.河南省黄金资源综合利用重点实验室,河南 郑州 450006;3.中国地质科学院研究生院,北京 100037
基金项目:* 国家自然科学基金项目(编号:51404220),国土资源部地质调查项目(编号:12120114021901),河南省科技攻关项目(编号:152102310388)。
摘    要:河南某黄金冶炼渣铁品位为27.24%,铁主要以赤铁矿的形式存在。为回收该渣中铁,采用直接还原焙烧—弱磁选工艺进行试验。结果表明:在还原剂焦煤加入量为15%、氧化钙加入量为5%、焙烧温度为1 150℃、焙烧时间为80 min、焙烧产品磨细至-0.045 mm占75%、弱磁选磁场强度为60 k A/m时,可以获得铁品位为91.4%、回收率为79.5%的铁精矿,实现了该黄金冶炼渣中铁的高效回收。

关 键 词:黄金冶炼渣  直接还原焙烧  弱磁选  氧化钙

Recovery of Iron from Gold Smelting Slag from Henan by Direct Reduction Roasting-Low Intensity Magnetic Separation Process
Wang Wei,Liu Lin,Feng Ansheng,Liu Hongzhao,Gao Zhaoguo.Recovery of Iron from Gold Smelting Slag from Henan by Direct Reduction Roasting-Low Intensity Magnetic Separation Process[J].Metal Mine,2015,44(12):169-172.
Authors:Wang Wei  Liu Lin  Feng Ansheng  Liu Hongzhao  Gao Zhaoguo
Affiliation:1.Zhengzhou Institute of Multipurpose Utilization of Mineral Resources,Chinese Academy of Gedogical Sciences,Zhengzhou 450006,China;2.Comprehensive Utilization Key Laboratory of Gold Resource in Henan Province,Zhengzhou 450006,China;3.Graduate Department of Chinese Academy Geological Sciences,Beijing 100037,China;
Abstract:There is 27.24% iron in a gold smelting slag from Henan Province.The iron in the slag mainly exists in the form of hematite.Direct reduction roasting-low intensity magnetic separation process was conducted on the slag to recovery iron from this gold smelting slag.The results showed while the dosage of reducing agent is 15%,dosage of calcium oxide is 5%,roasting temperature is 1 150 ℃,roasting time is 80 min,and then ground the roasted product to -0.045 mm accounted for 75%,magnetic field intensity is 60 kA/m,the iron concentrate with iron grade of 91.4% and iron recovery of 79.5% can be obtained,high efficiently recovery of iron in slag was realized.
Keywords:Gold smelting slag  Direct reduction roasting  Low intensity magnetic separation  Calcium oxide
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