高磷鲕状赤铁矿深度还原过程中磷的迁移规律
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摘要
针对鄂西某地高磷鲕状赤铁矿进行了深度还原技术研究,考查了还原温度、还原时间、配碳系数和CaO添加量对磷迁移规律的影响。结果表明:进入铁粉中磷的品位和回收率随着还原温度的升高和还原时间的延长而升高,随着配碳系数的增大先升高后降低,并在配碳系数为2.0时达到最大;而受CaO添加量的影响较小。还原物料的XRD和SEM分析表明大部分磷被还原为单质迁移进入了铁粉中。对高磷鲕状赤铁矿深度还原过程中磷的迁移规律进行了初步探索,为进一步研究高磷鲕状赤铁矿提供了一定的理论基础。
For the high phosphorus oolitic hematite ore,coal-based reduction technology was investigated.Single-factor experiments were carried out to investigate the effect of reduction temperature,reduction time,C/O mole ratio and CaO addition on the phosphorus migration behaviors in the reduction of high phosphorus oolitic hematite.After the phosphorus into the iron powder was analyzed,the results show in a certain aspects below.First,both the grade and recovery of phosphorus into the iron powder increase respectively following the rise of reduction temperature as well as the extension of time.Second,with the enlargement of C/O mole ratio,the grade of phosphorus shows a rising before dropping down.Third,the grade of phosphorus is not been influenced much on CaO addition.In addition,XRD and SEM analysis of reduced materials further reveal that elemental phosphorus can be gained after reduction and most of them migrated into the iron powder.A preliminary exploration ophosphorus migration behavior in reduction of high phosphorus oolitic hematite is conducted and a theoretical basis for further study on the high phosphorus oolitic hematite is provided as well.
For the high phosphorus oolitic hematite ore,coal-based reduction technology was investigated.Single-factor experiments were carried out to investigate the effect of reduction temperature,reduction time,C/O mole ratio and CaO addition on the phosphorus migration behaviors in the reduction of high phosphorus oolitic hematite.After the phosphorus into the iron powder was analyzed,the results show in a certain aspects below.First,both the grade and recovery of phosphorus into the iron powder increase respectively following the rise of reduction temperature as well as the extension of time.Second,with the enlargement of C/O mole ratio,the grade of phosphorus shows a rising before dropping down.Third,the grade of phosphorus is not been influenced much on CaO addition.In addition,XRD and SEM analysis of reduced materials further reveal that elemental phosphorus can be gained after reduction and most of them migrated into the iron powder.A preliminary exploration ophosphorus migration behavior in reduction of high phosphorus oolitic hematite is conducted and a theoretical basis for further study on the high phosphorus oolitic hematite is provided as well.
引文
[1]孙永升,韩跃新,包士雷,等.鲕状赤铁矿深度还原矿组成特性及磁选试验研究[J].现代矿业,2010(7):26.
[2]郑贵山,刘炯天.浅析鲕状赤铁矿提铁脱磷研究方法[J].金属矿山,2009(11):220.
[3]韩跃新,孙永升,高鹏,等.某鲕状赤铁矿深度还原机理研究[J].中国矿业,2009,18(7):284.
[4]李永利,孙体昌,杨慧芬,等.高磷鲕状赤铁矿直接还原同步脱磷研究[J].矿冶工程,2011,31(2):68.
[5]杨大伟,孙体昌,徐承焱.高磷鲕状赤铁矿还原焙烧同步脱磷工艺研究[J].矿冶工程,2010,30(1):29.
[6]徐承焱,孙体昌,祁超英,等.煤种对高磷鲕状赤铁矿直接还原同步脱磷的影响[J].金属矿山,2010(3):46.
[7]Kubo H,Yokoyama K M,Nagasaka T.Magnetic Separationof Phosphorus Enriched Phase From Multiphase Dephospho-rization Slag[J].ISIJ International,2010,50(1):59.
[8]Diao J,Xie B,Wang Y H,et al.Recovery of PhosphorusFrom Dephosphorization Slag Produced by Duplex HighPhosphorus Hot Metal Refining[J].ISIJ International,2012,52(6):955.
[9]金恒阁,于立波,俎晓彤,等.钢铁废渣与磷肥[J].中国物资再生,1999(3):31.
[10]刘河云.钢渣是钙镁磷肥最适宜的添加物[J].磷肥和复肥,2010,25(4):35.
[11]周继程.高磷鲕状赤铁矿煤基直接还原法提铁脱磷技术研究[D].武汉:武汉科技大学.2007.
[2]郑贵山,刘炯天.浅析鲕状赤铁矿提铁脱磷研究方法[J].金属矿山,2009(11):220.
[3]韩跃新,孙永升,高鹏,等.某鲕状赤铁矿深度还原机理研究[J].中国矿业,2009,18(7):284.
[4]李永利,孙体昌,杨慧芬,等.高磷鲕状赤铁矿直接还原同步脱磷研究[J].矿冶工程,2011,31(2):68.
[5]杨大伟,孙体昌,徐承焱.高磷鲕状赤铁矿还原焙烧同步脱磷工艺研究[J].矿冶工程,2010,30(1):29.
[6]徐承焱,孙体昌,祁超英,等.煤种对高磷鲕状赤铁矿直接还原同步脱磷的影响[J].金属矿山,2010(3):46.
[7]Kubo H,Yokoyama K M,Nagasaka T.Magnetic Separationof Phosphorus Enriched Phase From Multiphase Dephospho-rization Slag[J].ISIJ International,2010,50(1):59.
[8]Diao J,Xie B,Wang Y H,et al.Recovery of PhosphorusFrom Dephosphorization Slag Produced by Duplex HighPhosphorus Hot Metal Refining[J].ISIJ International,2012,52(6):955.
[9]金恒阁,于立波,俎晓彤,等.钢铁废渣与磷肥[J].中国物资再生,1999(3):31.
[10]刘河云.钢渣是钙镁磷肥最适宜的添加物[J].磷肥和复肥,2010,25(4):35.
[11]周继程.高磷鲕状赤铁矿煤基直接还原法提铁脱磷技术研究[D].武汉:武汉科技大学.2007.