高磷鲕状赤铁矿石深度还原探索性试验研究
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摘要
采用深度还原-磁选工艺处理湖北官店的高磷鲕状赤铁矿石,考察了还原温度、还原时间和配碳系数对还原指标的影响,以及温度对还原产物微观形貌的影响。结果表明:在还原温度1 200℃、还原时间60 min、配碳系数2.0的适宜工艺条件下可获得金属化率90.72%的还原产物,磁选后还原铁粉品位达90.55%,铁回收率达92.03%;随着还原温度提高,铁颗粒逐渐长大,原矿的鲕状结构被破坏。
The oolitic hematite ore from Hubei Guandian was treated with the process of deep reduction-magnetic separation,for investigating effects of reduction temperature,reduction time and carbon addition coefficient on the reduction results,as well as the effect of reduction temperature on the microstructure of the reduction product. The results showed that the reduced material with metallization rate up to 90. 72% was obtained under the reduction conditions such as reduction temperature of 1 200 ℃,reduction time of 60 min and carbon addition coefficient of 2. 0.After magnetic separation of the reduced product,the grade of iron powder reached to 90. 55%,and the iron recovery to92. 03%. With the increase of reduction temperature,the iron particles gradually grew up leading to the oolitic structure of the raw ore destroyed.
The oolitic hematite ore from Hubei Guandian was treated with the process of deep reduction-magnetic separation,for investigating effects of reduction temperature,reduction time and carbon addition coefficient on the reduction results,as well as the effect of reduction temperature on the microstructure of the reduction product. The results showed that the reduced material with metallization rate up to 90. 72% was obtained under the reduction conditions such as reduction temperature of 1 200 ℃,reduction time of 60 min and carbon addition coefficient of 2. 0.After magnetic separation of the reduced product,the grade of iron powder reached to 90. 55%,and the iron recovery to92. 03%. With the increase of reduction temperature,the iron particles gradually grew up leading to the oolitic structure of the raw ore destroyed.
引文
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[15]张光明,冯可芹,邓伟林,等.钒钛磁铁矿碳热合成铁基复合材料的热力学分析[J].四川大学学报(工程科学版),2012(4):191-196.
[2]Jie Wu,Zhijun Wen,Mingjin Cen.Development of technologies for high phosphorus oolitic hematite utilization[J].Steel Research International,2011(5):494-500.
[3]李艳军,王艳玲,刘杰,等.羚羊铁矿石工艺矿物学[J].东北大学学报(自然科学版),2011(10):1484-1487.
[4]张裕书,丁亚卓,龚文琪.宁乡式鲕状赤铁矿选矿研究进展[J].金属矿山,2010(8):92-96.
[5]赵海涛.湘西某鲕状赤铁矿选矿试验研究[J].矿冶工程,2014(3):40-43.
[6]张汉泉,付金涛,路漫漫,等.高磷鲕状赤铁矿动态磁化焙烧-磁选试验研究[J].矿冶工程,2015(2):47-49.
[7]朱德庆,李静华,杜永强,等.强化鲕状赤铁矿还原磁选脱磷机理研究[J].矿冶工程,2014(5):74-77.
[8]赵海涛.湘西某鲕状赤铁矿选矿试验研究[J].矿冶工程,2014(3):40-43.
[9]张志荣,孙体昌,胡天洋.酒钢镜铁山铁矿石直接还原-磁选试验研究[J].矿冶工程,2014(5):54-57.
[10]韩跃新,孙永升,高鹏,等.高磷鲕状赤铁矿开发利用现状及发展趋势[J].金属矿山,2012(3):1-5.
[11]孙永升,李淑菲,韩跃新,等.某鲕状赤铁矿深度还原试验研究[J].金属矿山,2009(5):80-83.
[12]Yongsheng Sun,Yuexin Han,Peng Gao,et al.Recovery of iron from high phosphorus oolitic iron ore using coal-based reduction followed by magnetic separation[J].International Journal of Minerals,Metallurgy and Materials,2013(5):411-419.
[13]Peng Gao,Yongsheng Sun,Duozhen Ren,et al.Growth of metallic iron particles during coal-based reduction of a rare earths-bearing iron ore[J].Minerals&Metallurgical Processing,2013(1):74-78.
[14]Yongsheng Sun,Peng Gao,Yuexin Han,et al.Reaction Behavior of Iron Minerals and Metallic Iron Particles Growth in Coal-Based Reduction of an Oolitic Iron Ore[J].Industrial&Engineering Chemistry Research,2013(6):2323-2329.
[15]张光明,冯可芹,邓伟林,等.钒钛磁铁矿碳热合成铁基复合材料的热力学分析[J].四川大学学报(工程科学版),2012(4):191-196.