复杂难选铁矿石悬浮磁化焙烧-高效分选技术
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摘要
针对传统铁矿石磁化焙烧技术与装备存在焙烧产品质量差、产能低、能耗高和环境污染严重等问题,创造性提出了一种"预热-蓄热还原-再氧化"悬浮磁化焙烧新工艺。该工艺具有原料适应性广、焙烧产品质量均匀、回收率高、生产能耗低、无污染等特点,适合处理赤铁矿、褐铁矿、菱铁矿及其混合型难选铁矿石。通过多年的潜心基础研究与技术攻关,形成了非均质矿石颗粒悬浮态流动控制、蓄热式高效低温还原、铁物相精准调控与余热同步回收等一系列关键技术,建成了500 kg/h复杂难选铁矿石悬浮磁化焙烧-高效分选半工业试验平台。酒泉钢铁(集团)有限责任公司建成了165万t/a的粉矿悬浮磁化焙烧工业化生产线,为难选铁矿资源的高效利用开辟了新途径。
In order to solve the problems of poor quality of roasted products, low productivity, high energy consumption and serious environmental pollution induced by traditional iron ore magnetization roasting technology and equipment, an innovative suspended magnetization roasting process of preheating-heat-retaining reduction-reoxidation was proposed. The process has the characteristics of wide adaptability of raw materials, homogeneity of roasted products, high iron recovery, low production energy consumption and less pollution emissions, and is suitable for the treatment of hematite, limonite, siderite and their mixed refractory iron ores. A series of key technologies such as the flow control of heterogeneous ore powders in suspension, low temperature heat-retaining reduction, precise phase transformation control of iron minerals and simultaneous recovery of heat have been developed. Meanwhile, a demonstration project of efficient beneficiation of refractory iron ores based on suspended magnetization roasting with a throughput of 500 kg/h was completed. Currently, the process has achieved an industrial application of 1.65 million t/a in Jiuquan Iron and Steel(Group) Co., Ltd., which will provide a demonstration for the efficient use of refractory iron ores.
In order to solve the problems of poor quality of roasted products, low productivity, high energy consumption and serious environmental pollution induced by traditional iron ore magnetization roasting technology and equipment, an innovative suspended magnetization roasting process of preheating-heat-retaining reduction-reoxidation was proposed. The process has the characteristics of wide adaptability of raw materials, homogeneity of roasted products, high iron recovery, low production energy consumption and less pollution emissions, and is suitable for the treatment of hematite, limonite, siderite and their mixed refractory iron ores. A series of key technologies such as the flow control of heterogeneous ore powders in suspension, low temperature heat-retaining reduction, precise phase transformation control of iron minerals and simultaneous recovery of heat have been developed. Meanwhile, a demonstration project of efficient beneficiation of refractory iron ores based on suspended magnetization roasting with a throughput of 500 kg/h was completed. Currently, the process has achieved an industrial application of 1.65 million t/a in Jiuquan Iron and Steel(Group) Co., Ltd., which will provide a demonstration for the efficient use of refractory iron ores.
引文
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[3] 余建文,韩跃新,李艳军,等.鞍山式赤铁矿预选粗精矿悬浮态磁化焙烧—磁选试验研究[J].中南大学学报:自然科学版,2018,49(4):771.(Yu J W,Han Y X,Li Y J,et al.Experimental study on utilization of crude concentrate from an Anshan-type hematite ore by suspension magnetization roasting-magnetic separation [J].Journal of Central South University:Science and Technology,2018,49(4):771.)
[4] 高鹏,余建文,韩跃新,等.东鞍山铁矿石预富集精矿悬浮磁化焙烧试验[C]//第十一届中国钢铁年会论文集S01:炼铁与原料.北京:冶金工业出版社,2017:586.(Gao P,Yu J W,Han Y X,et al.Investigation on fluidized magnetization roasting of pre-concentrate for Donganshan iron ore [C]// Proceedings of the 11th CSM Steel Congress - Ironmaking and Raw Materials.Beijing:Metallurgical Industry Press,2017:586.)
[5] 高鹏,余建文,张淑敏,等.东鞍山铁矿混磁精矿悬浮焙烧—弱磁选试验研究[J].金属矿山,2016,45(12):18.(Gao P,Yu J W,Zhang S M,et al.Experimental study on suspension roasting-low intensity magnetic separation of magnetic mixed concentrate from Donganshan [J].Metal Mine,2016,45(12):18.)
[6] 陈延信,白佳伦,赵博.贫赤铁-黄金尾渣悬浮态磁化焙烧选矿试验[J].钢铁研究学报,2013,25(6):24.(Chen Y X,Bai J L,Zhao B.Suspened state magnetization roasting beneficiation test of poor hematite from gold tailings [J].Journal of Iron and Steel Research,2013,25(6):24.)
[7] 张汉泉,汪凤玲.赤褐铁矿磁化焙烧矿物组成和物相变化规律[J].钢铁研究学报,2014,26(7):8.(Zhang H Q,Wang F L.Regulation of mineral copmposition and phase transformation in hematite and limonite magnetic roasting process [J].Journal of Iron and Steel Research,2014,26(7):8.)
[8] 余建文,韩跃新,李艳军,等.复杂难选弱磁性铁矿石磁化焙烧技术研究现状与发展前景[J].河北冶金,2018(10):1.(Yu J W,Han Y X,Li Y J,et al.Recent advances and development prospect of magnetization roasting of refractory weak magnetic iron ores [J].Hebei Metallurgy,2018(10):1.)
[9] 袁帅,韩跃新,高鹏,等.难选铁矿石悬浮磁化焙烧技术研究现状及进展[J].金属矿山,2016,45(12):9.(Yuan S,Han Y X,Gao P,et al.Research status and development of suspension roasting for refractory iron ore [J].Metal Mine,2016,45(12):9.)
[10] Yu J W,Han Y X,Li Y J,et al.Mechanism and kinetics of the reduction of hematite to magnetite with CO-CO2 in a micro-fluidized bed[J].Minerals,2017,7(11):209.
[11] 韩跃新,李艳军,袁帅,等.一种难选铁矿石多段悬浮磁化焙烧—磁选系统装置及方法:中国,CN106868292A[P].2017-06-20.(Han Y X,Li Y J,Yuan S,et al.A Multi-Stage Fluidized Magnetization Roasting-Magnetic Separation Device and Method for Refractory Iron Ores:China,CN106868292A[P].2017-06-20.)
[12] 韩跃新,余建文,高鹏,等.一种添加剂强化赤铁矿磁化焙烧的方法:中国,CN106755969A [P].2017-05-31.(Han Y X,Yu J W,Gao P,et al.A Method for Enhancing Magnetic Reduction Roasting of Hematite by an Additive:China,CN106755969A[P].2017-05-31.)
[13] 韩跃新,袁帅,李艳军,等.一种处理高铁低铝煤系高岭土的流态化煅烧装置及方法:中国,CN106241826A[P].2016-12-21.(Han Y X,Yuan S,Li Y J,et al.A Fluidized Calcining Device and Method for Treating High-Iron Low-Alumina Coal Kaolin:China,CN106241826A[P].2016-12-21.)
[14] 韩跃新,刘鹤群,李艳军.一种用复杂难选铁矿石生产铁精矿的新方法:中国,CN105772216A[P].2016-07-20.(Han Y X,Liu H Q,Li Y J. A New Method for Producing Iron Concentrate with Complex Refractory Iron Ore:China,CN105772216A [P].2016-07-20.)
[15] 刘亚川,张裕书,韩跃新,等.含菱铁矿的混合铁矿流态化焙烧分选方法:中国,CN104846189A[P].2015-08-19.(Liu Y C,Zhang Y S,Han Y X,et al.A fluidized Roasting and Beneficiation Method for Siderite-Bearing Iron Ore:China,CN104846189A[P].2015-08-19.)
[16] 韩跃新,李艳军,高鹏.复杂难选铁矿石的预富集—三段悬浮焙烧—磁选处理方法[P].中国:CN104818378A,2015-08-05.(Han Y X,Li Y J,Gao P,et al.A Pre-Enrichment - Three-Stage Fluidized Roasting-Magnetic Separation Method for Refractory Iron Ore [P].China:CN104818378A,2015-08-05.)
[17] 韩跃新,高鹏,李艳军,等.一种复杂难选铁矿石分级悬浮焙烧装置:中国,CN105132670A[P].2015-12-09.(Han Y X,Gao P,Li Y J,et al.A Classifying and Fluidized Roasting Device for Refractory Iron Ore:China,CN105132670A[P].2015-12-09.)
[18] 复杂难选铁矿预富集—悬浮焙烧—磁选新技术[N].世界金属导报,2015-06-16(B04).(A new technology of pre-enrichment-fluidized roasting-magnetic separation for refractory iron ore [N].World Metals,2015-06-16(B04).)
[19] 韩跃新,高鹏,李艳军,等.我国铁矿资源“劣质能用、优质优用”发展战略研究[J].金属矿山,2016(12):2.(Han Y X,Gao P,Li Y J,et al.Development strategies of available use of inferior quality and optimal use of high quality for domestic iron ore resources [J].Metal Mine,2016(12):2.)
[20] 韩跃新,唐志东,高鹏,等.铁矿石集约化高效利用关键技术研究[C]//第十一届中国钢铁年会论文集S01:炼铁与原料.北京:冶金工业出版社,2017:418.(Han Y X,Tang Z D,Gao P,et al.Study on the key technology of intensive and efficient utilization for iron ore [C]//Proceedings of the 11th CSM Steel Congress - Ironmaking and Raw Materials.Beijing:Metallurgical Industry Press,2017:418.)
[21] Yu J W,Han Y X,Gao P,et al.An innovative methodology for recycling iron from magnetic preconcentrate of an iron ore tailing [J].Physicochemical Problems of Mineral Process,2018,54(3):668.
[22] Yu J W,Han Y X,Li Y J,et al.Recovery and separation of iron from iron ore using innovative fluidized magnetization roasting and magnetic separation[J].Journal of Mining and Metallurgy,2018,54B(1):21.
[2] 张宗旺,李健,李燕,等.国内难选铁矿的开发利用现状及发展[J].有色金属科学与金属,2012,3(1):72.(Zhang Z W,Li J,Li Y,et al.The development and utilization status of China’s refractory ore [J].Nonferrous Metals Science and Engineering,2012,3(1):72.)
[3] 余建文,韩跃新,李艳军,等.鞍山式赤铁矿预选粗精矿悬浮态磁化焙烧—磁选试验研究[J].中南大学学报:自然科学版,2018,49(4):771.(Yu J W,Han Y X,Li Y J,et al.Experimental study on utilization of crude concentrate from an Anshan-type hematite ore by suspension magnetization roasting-magnetic separation [J].Journal of Central South University:Science and Technology,2018,49(4):771.)
[4] 高鹏,余建文,韩跃新,等.东鞍山铁矿石预富集精矿悬浮磁化焙烧试验[C]//第十一届中国钢铁年会论文集S01:炼铁与原料.北京:冶金工业出版社,2017:586.(Gao P,Yu J W,Han Y X,et al.Investigation on fluidized magnetization roasting of pre-concentrate for Donganshan iron ore [C]// Proceedings of the 11th CSM Steel Congress - Ironmaking and Raw Materials.Beijing:Metallurgical Industry Press,2017:586.)
[5] 高鹏,余建文,张淑敏,等.东鞍山铁矿混磁精矿悬浮焙烧—弱磁选试验研究[J].金属矿山,2016,45(12):18.(Gao P,Yu J W,Zhang S M,et al.Experimental study on suspension roasting-low intensity magnetic separation of magnetic mixed concentrate from Donganshan [J].Metal Mine,2016,45(12):18.)
[6] 陈延信,白佳伦,赵博.贫赤铁-黄金尾渣悬浮态磁化焙烧选矿试验[J].钢铁研究学报,2013,25(6):24.(Chen Y X,Bai J L,Zhao B.Suspened state magnetization roasting beneficiation test of poor hematite from gold tailings [J].Journal of Iron and Steel Research,2013,25(6):24.)
[7] 张汉泉,汪凤玲.赤褐铁矿磁化焙烧矿物组成和物相变化规律[J].钢铁研究学报,2014,26(7):8.(Zhang H Q,Wang F L.Regulation of mineral copmposition and phase transformation in hematite and limonite magnetic roasting process [J].Journal of Iron and Steel Research,2014,26(7):8.)
[8] 余建文,韩跃新,李艳军,等.复杂难选弱磁性铁矿石磁化焙烧技术研究现状与发展前景[J].河北冶金,2018(10):1.(Yu J W,Han Y X,Li Y J,et al.Recent advances and development prospect of magnetization roasting of refractory weak magnetic iron ores [J].Hebei Metallurgy,2018(10):1.)
[9] 袁帅,韩跃新,高鹏,等.难选铁矿石悬浮磁化焙烧技术研究现状及进展[J].金属矿山,2016,45(12):9.(Yuan S,Han Y X,Gao P,et al.Research status and development of suspension roasting for refractory iron ore [J].Metal Mine,2016,45(12):9.)
[10] Yu J W,Han Y X,Li Y J,et al.Mechanism and kinetics of the reduction of hematite to magnetite with CO-CO2 in a micro-fluidized bed[J].Minerals,2017,7(11):209.
[11] 韩跃新,李艳军,袁帅,等.一种难选铁矿石多段悬浮磁化焙烧—磁选系统装置及方法:中国,CN106868292A[P].2017-06-20.(Han Y X,Li Y J,Yuan S,et al.A Multi-Stage Fluidized Magnetization Roasting-Magnetic Separation Device and Method for Refractory Iron Ores:China,CN106868292A[P].2017-06-20.)
[12] 韩跃新,余建文,高鹏,等.一种添加剂强化赤铁矿磁化焙烧的方法:中国,CN106755969A [P].2017-05-31.(Han Y X,Yu J W,Gao P,et al.A Method for Enhancing Magnetic Reduction Roasting of Hematite by an Additive:China,CN106755969A[P].2017-05-31.)
[13] 韩跃新,袁帅,李艳军,等.一种处理高铁低铝煤系高岭土的流态化煅烧装置及方法:中国,CN106241826A[P].2016-12-21.(Han Y X,Yuan S,Li Y J,et al.A Fluidized Calcining Device and Method for Treating High-Iron Low-Alumina Coal Kaolin:China,CN106241826A[P].2016-12-21.)
[14] 韩跃新,刘鹤群,李艳军.一种用复杂难选铁矿石生产铁精矿的新方法:中国,CN105772216A[P].2016-07-20.(Han Y X,Liu H Q,Li Y J. A New Method for Producing Iron Concentrate with Complex Refractory Iron Ore:China,CN105772216A [P].2016-07-20.)
[15] 刘亚川,张裕书,韩跃新,等.含菱铁矿的混合铁矿流态化焙烧分选方法:中国,CN104846189A[P].2015-08-19.(Liu Y C,Zhang Y S,Han Y X,et al.A fluidized Roasting and Beneficiation Method for Siderite-Bearing Iron Ore:China,CN104846189A[P].2015-08-19.)
[16] 韩跃新,李艳军,高鹏.复杂难选铁矿石的预富集—三段悬浮焙烧—磁选处理方法[P].中国:CN104818378A,2015-08-05.(Han Y X,Li Y J,Gao P,et al.A Pre-Enrichment - Three-Stage Fluidized Roasting-Magnetic Separation Method for Refractory Iron Ore [P].China:CN104818378A,2015-08-05.)
[17] 韩跃新,高鹏,李艳军,等.一种复杂难选铁矿石分级悬浮焙烧装置:中国,CN105132670A[P].2015-12-09.(Han Y X,Gao P,Li Y J,et al.A Classifying and Fluidized Roasting Device for Refractory Iron Ore:China,CN105132670A[P].2015-12-09.)
[18] 复杂难选铁矿预富集—悬浮焙烧—磁选新技术[N].世界金属导报,2015-06-16(B04).(A new technology of pre-enrichment-fluidized roasting-magnetic separation for refractory iron ore [N].World Metals,2015-06-16(B04).)
[19] 韩跃新,高鹏,李艳军,等.我国铁矿资源“劣质能用、优质优用”发展战略研究[J].金属矿山,2016(12):2.(Han Y X,Gao P,Li Y J,et al.Development strategies of available use of inferior quality and optimal use of high quality for domestic iron ore resources [J].Metal Mine,2016(12):2.)
[20] 韩跃新,唐志东,高鹏,等.铁矿石集约化高效利用关键技术研究[C]//第十一届中国钢铁年会论文集S01:炼铁与原料.北京:冶金工业出版社,2017:418.(Han Y X,Tang Z D,Gao P,et al.Study on the key technology of intensive and efficient utilization for iron ore [C]//Proceedings of the 11th CSM Steel Congress - Ironmaking and Raw Materials.Beijing:Metallurgical Industry Press,2017:418.)
[21] Yu J W,Han Y X,Gao P,et al.An innovative methodology for recycling iron from magnetic preconcentrate of an iron ore tailing [J].Physicochemical Problems of Mineral Process,2018,54(3):668.
[22] Yu J W,Han Y X,Li Y J,et al.Recovery and separation of iron from iron ore using innovative fluidized magnetization roasting and magnetic separation[J].Journal of Mining and Metallurgy,2018,54B(1):21.
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