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酒钢镜铁矿悬浮磁化焙烧试验研究
引用本文:马玉成,李艳军,孙永升. 酒钢镜铁矿悬浮磁化焙烧试验研究[J]. 金属矿山, 2019, 48(2): 34-37
作者姓名:马玉成  李艳军  孙永升
作者单位:东北大学资源与土木工程学院,辽宁沈阳110819;难采选铁矿资源高效开发利用技术国家地方联合工程研究中心,辽宁沈阳110819;东北大学资源与土木工程学院,辽宁沈阳110819;难采选铁矿资源高效开发利用技术国家地方联合工程研究中心,辽宁沈阳110819;东北大学资源与土木工程学院,辽宁沈阳110819;难采选铁矿资源高效开发利用技术国家地方联合工程研究中心,辽宁沈阳110819
基金项目:基金项目:国家自然科学基金面上项目(编号:51874071),中央高校基本科研业务费项目
摘    要:酒钢选烧厂竖炉给矿铁品位为33.84%,有用铁矿物主要为镜铁矿、褐铁矿、菱铁矿,脉石矿物主要为石英,有害元素P含量较低。针对酒钢镜铁矿采用常规选矿方法选别指标差的问题,采用磁化焙烧-磨矿-弱磁选流程法对有代表性试样进行选别试验研究。结果表明:在焙烧温度650 ℃、焙烧时间5 min、CO浓度30%、总气体流量500 mL/min条件下进行磁化焙烧,焙烧产品磨细至-0.074 mm占82%,在磁场强度为119.4 kA/m条件下经过弱磁选,精矿铁品位可以达到59.12%、铁回收率为81.31%,精矿中主要有害杂质Al2O3和P含量都较低,达到冶炼原料的要求。研究结果为酒钢镜铁矿的开发利用提供了依据,并对同类型矿石的开发利用具有指导意义。

关 键 词:难选铁矿  镜铁矿  磁化焙烧  弱磁选

Experimental Study on Suspension Magnetization Roasting of Jiugang Specularite
Ma Yucheng,Li Yanjun,Sun Yongsheng. Experimental Study on Suspension Magnetization Roasting of Jiugang Specularite[J]. Metal Mine, 2019, 48(2): 34-37
Authors:Ma Yucheng  Li Yanjun  Sun Yongsheng
Affiliation:1. School of Resources and Civil Engineering, Northeastern University, Shenyang 110819,China;2. National-Local Joint Engineering Research Center of Refractory Iron Ore Resources Efficient Utilization Technology,Shenyang 110819,China
Abstract:There is 33.84% iron in feeding of vertical furnace in Jiugang Plant, main useful iron ores are specularite, limonite, siderite, gangue minerals are mainly quartz, and the content of harmful element P is low. In order to solve the problem of poor separation index of Jiugang specularite by conventional separation method, the magnetic roasting-grinding-low intensity magnetic separation method was used to the study on representative sample. Results show that the concentrate with iron grade 59.12%, and iron recovery of 81.31% can obtained under the conditions of roasting temperature 650 ℃, roasting time 5 min, CO concentration 30%, total gas volume 500 mL/min for magnetizing roasting, the roasted products ground to 82% of -0.074 mm, via low intensity magnetic separation in 119.4 kA/m. The main harmful impurities Al2O3 and P in concentrate is relatively lower, and can meet the requirements of smelting raw materials. The research conclusion provided a basis for the development and utilization of Jiugang specularite ore, and has guiding significance for the development and utilization of the same type of ore.
Keywords:Refractory iron ore  Specularite  Magnetization roasting  Low intensity magnetic separation
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