湿式弱磁选从含钛高炉渣中提取金属铁的研究
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摘要
基于攀钢高钛型含钛高炉渣综合利用现状,提出"磁选收铁-活化脱铝—酸浸提钛"的技术途径,以期实现含钛高炉渣中Fe、Al、Ti等有价元素的综合回收。采用X射线衍射仪和矿相显微镜研究了含钛高炉渣中矿物相的组成和金属铁在含钛高炉渣中的赋存状态。采用单一弱磁选和阶段磨矿-阶段弱磁选的工艺回收含钛高炉渣中的金属铁。结果表明:高炉渣中的主要矿物相为钙钛矿、透辉石和镁铝尖晶石,金属铁多以球粒状分布于透辉石等矿物颗粒中,含少量磁铁矿。采用阶磨、阶选的工艺在节约磨矿成本的同时可获得铁精矿的品位为63.5%,回收率为64.2%,有效回收了高炉渣中的金属铁,并为后续工艺中活化脱铝和酸浸提钛创造了有利条件。
Based on research status of comprehensive utilization of titanium rich blast furnace slag(BF slag)in Pangang,the technical approach of "Fe recycling by magnetic separation-dealuminizing by activation-Ti leaching by acidolysis "was proposed to recycle valuable elements including Fe,Al,and Ti in the slag.Mineral phases and iron occurrence in the Ti-bearing BF slag were analyzed by means of XRD and metallographic microscope.The technologies of single low-intensity magnetic separation and staged grinding and low-intensity magnetic separation were adopted respectively for iron recycling.The results show that the main mineral phases of the BF slag are perovskite,diopside and spinel,and metallic iron existing as globularity mostly distributes in the diopside.Except grinding cost saving,the utilization of the staged grinding and low-intensity magnetic separation also boosts an iron concentrate of 63.5% with a recovery rate of total iron at 64.2%,which creates favorable conditions for subsequent dealuminizing and Ti leaching.
Based on research status of comprehensive utilization of titanium rich blast furnace slag(BF slag)in Pangang,the technical approach of "Fe recycling by magnetic separation-dealuminizing by activation-Ti leaching by acidolysis "was proposed to recycle valuable elements including Fe,Al,and Ti in the slag.Mineral phases and iron occurrence in the Ti-bearing BF slag were analyzed by means of XRD and metallographic microscope.The technologies of single low-intensity magnetic separation and staged grinding and low-intensity magnetic separation were adopted respectively for iron recycling.The results show that the main mineral phases of the BF slag are perovskite,diopside and spinel,and metallic iron existing as globularity mostly distributes in the diopside.Except grinding cost saving,the utilization of the staged grinding and low-intensity magnetic separation also boosts an iron concentrate of 63.5% with a recovery rate of total iron at 64.2%,which creates favorable conditions for subsequent dealuminizing and Ti leaching.
引文
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[7]Huang Zhenqi,Wang Minghua,Du Xinghong,et al.Recovery of titanium from the rich titanium slag by H2SO4 method[J].Jour-nal of Materials Science and Technology,2003,19(2):191-192.
[8]Wang Minghua,Du Xinghong,Sui Zhitong.Recovery of titanium from rich titanium blast furnace slag[J].Multipurpose Utili-zation of Mineral Resources,2000,4:5-7.(王明华,都兴红,隋智通.硫酸法由富钛高炉渣中提取钛[J].矿产综合利用,2000,4:5-7.)
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[11]Wang Huaibin,Cheng Xiangli,Sun Xiaoyue,et al.Study on preparation of sintering slag brick using blast furnace slag contai-ning titanium[J].Multipurpose Utilization of Mineral Resources,2009(1):36-39.(王怀斌,程相利,孙小跃,等.含钛高炉渣用于烧结矿渣砖的研究[J].矿产综合利用,2009(1):36-39.)
[12]Kong Deyu,Guan Hao,Zhang Qian,et al.Research on preparation of formaldehyde absorbent from titaniferous slag[J].IronSteel Vanadium Titanium,2012,33(1):40-43.(孔德彧,管昊,张倩,等.含钛高炉渣制备甲醛吸附剂的研究[J].钢铁钒钛,2012,33(1):40-43.)
[13]Liang Chongshun.The research on the mineral processing mineralogy characteristic of the smelting iron slag in Panzhihua[D].KunMing:Kunming University of Science and Technology,2001.(梁崇顺.攀枝花高炉渣选矿工艺矿物学性质研究[D].昆明:昆明理工大学,2001.)
[2]Li Yuhai,Lou Taiping,Sui Zhitong.Selective enrichment of Ti component in Ti-bearing blast furnace slag and precipitation be-havior of perovskite phase[J].The Chinese Journal of Nonferrous Metals,2000,10(5):719-722.(李玉海,娄太平,隋智通.含钛高炉渣中钛组分选择性富集及钙钛矿结晶行为[J].中国有色金属学报,2000,10(5):719-722.)
[3]Sui Zhitong,Guo Zhenzhong,Zhang Li,et al.Green separation technique of Ti component from Ti-bearing blast furnace slag[J].Journal of Materials and Metallurgy,2006,5(2):93-97.(隋智通,郭振中,张力,等.含钛高炉渣中钛组分的绿色分离技术[J].材料与冶金学报,2006,5(2):93-97.)
[4]Wang Mingyu,Lou Taiping,Sui Zhitong.Precipitation behavior of perovskite phase in oxidized titanium-bearing slag[J].TheChinese Journal of Process Engineering,2007,7(1):110-112.(王明玉,娄太平,隋智通.氧化性含钛高炉渣中钙钛矿相的析出行为[J].过程工程学报,2007,7(1):110-112.)
[5]Ke Changming.A method of producing titanium and its alloys from titanium-bearing slag:China,CN 200510019664.3[P].2006-04-12.(柯昌明.利用含钛炉渣制备钛及钛合金的方法:中国专利,CN200510019664.3[P].2006-04-12.)
[6]Ke Changming,Han Bingqiang,Wei Yaowu,et al.Extracting titanium by plasma smelting reduction from high titanium-bearingBF slag[C]//Papers of the 2010’s Conference on Integrated Utilization on Panzhihua High Titanium-bearing BF Slag.Panzhi-hua:2010:43-48.(柯昌明,韩兵强,魏耀武,等.高钛型高炉渣等离子熔融还原法提钛研究[C]//高钛型高炉渣综合利用学术研讨会论文集.四川攀枝花:2010:43-48.)
[7]Huang Zhenqi,Wang Minghua,Du Xinghong,et al.Recovery of titanium from the rich titanium slag by H2SO4 method[J].Jour-nal of Materials Science and Technology,2003,19(2):191-192.
[8]Wang Minghua,Du Xinghong,Sui Zhitong.Recovery of titanium from rich titanium blast furnace slag[J].Multipurpose Utili-zation of Mineral Resources,2000,4:5-7.(王明华,都兴红,隋智通.硫酸法由富钛高炉渣中提取钛[J].矿产综合利用,2000,4:5-7.)
[9]Xiong Yao,Li Chun,Liang Bin,et al.Leaching behavior of air cooled Ti-bearing blast-furnace slag in hydrochloric acid[J].The Chinese Journal of Nonferrous Metals,2008,18(3):557-563.(熊瑶,李春,梁斌,等.盐酸浸出自然冷却含钛高炉渣[J].中国有色金属学报,2008,18(3):557-563.)
[10]Zhang Peng,Liu Daijun,Mao Xuehua,et al.Leaching of water quenched titanium-bearing blast furnace slag in hydrochloricacid[J].Iron Steel Vanadium Titanium,2012,33(5):6-9.(张鹏,刘代俊,毛雪华,等.水淬含钛高炉渣的盐酸浸取研究[J].钢铁钒钛,2012,33(5):6-9.)
[11]Wang Huaibin,Cheng Xiangli,Sun Xiaoyue,et al.Study on preparation of sintering slag brick using blast furnace slag contai-ning titanium[J].Multipurpose Utilization of Mineral Resources,2009(1):36-39.(王怀斌,程相利,孙小跃,等.含钛高炉渣用于烧结矿渣砖的研究[J].矿产综合利用,2009(1):36-39.)
[12]Kong Deyu,Guan Hao,Zhang Qian,et al.Research on preparation of formaldehyde absorbent from titaniferous slag[J].IronSteel Vanadium Titanium,2012,33(1):40-43.(孔德彧,管昊,张倩,等.含钛高炉渣制备甲醛吸附剂的研究[J].钢铁钒钛,2012,33(1):40-43.)
[13]Liang Chongshun.The research on the mineral processing mineralogy characteristic of the smelting iron slag in Panzhihua[D].KunMing:Kunming University of Science and Technology,2001.(梁崇顺.攀枝花高炉渣选矿工艺矿物学性质研究[D].昆明:昆明理工大学,2001.)