含铌铁矿粉氢气选择性还原过程中磷行为
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摘要
对白云鄂博含铌铁矿粉氢气选择性还原-熔分-铌铁冶炼的提铌方案中磷的行为进行试验研究。在该试验条件下,磷质量分数为0.100%的含铌铁矿粉通氢气还原后熔分,得到磷质量分数小于0.010%、铌质量分数为2.000%的富铌渣,铁中铌质量分数为0.008%、磷质量分数为0.230%,铌磷分离效果明显,同时熔分后铌品位是原来的3.5倍。试验结果表明,氢气在还原阶段能够在还原铁氧化物的同时将Ca_3P_2O_8还原,通过熔分达到铌与磷、铁元素等分离的目的,铌有效地富集在渣中。
The phosphorus behavior of Nb-bearing iron ore powder in Bayan Obo was studied through the experiment of hydrogen selective reduction-melting-separation-Nb-bearing iron smelting. Under the experimental conditions,niobium-bearing iron ore powder containing 0.100% phosphorus was reduced by hydrogen and then melted,the niobium enriched slag which contained 2.00% niobium was yielded and contained phosphorus less than 0.010%. Meanwhile the iron contained niobium of 0.008% and phosphorus of 0.230%. And niobium concentration in the niobium enriched slag was 3.5 times in the niobium- bearing iron ore powder. The experimental results indicated that Ca_3P_2O_8 can also be reduced by hydrogen when iron oxides were reduced by hydrogen. So the aim that phosphorus and iron elements were separated from the niobium enriched slag had been achieved.
The phosphorus behavior of Nb-bearing iron ore powder in Bayan Obo was studied through the experiment of hydrogen selective reduction-melting-separation-Nb-bearing iron smelting. Under the experimental conditions,niobium-bearing iron ore powder containing 0.100% phosphorus was reduced by hydrogen and then melted,the niobium enriched slag which contained 2.00% niobium was yielded and contained phosphorus less than 0.010%. Meanwhile the iron contained niobium of 0.008% and phosphorus of 0.230%. And niobium concentration in the niobium enriched slag was 3.5 times in the niobium- bearing iron ore powder. The experimental results indicated that Ca_3P_2O_8 can also be reduced by hydrogen when iron oxides were reduced by hydrogen. So the aim that phosphorus and iron elements were separated from the niobium enriched slag had been achieved.
引文
[1]张波,李春龙,姜茂发.熔分过程中铌、磷在渣铁两相间的分配比[J].东北大学学报:自然科学版,2014,35(7):984.(ZHANG Bo,LI Chun-long,JIANG Mao-fa.Distribution ratio of niobium and phosphorus between slag and iron in the melting-separation process[J].Journal of Northeastern University:Natural Science,2014,35(7):984.
[2]郭财胜,李梅,柳召刚.白云鄂博稀土、铌资源综合利用现状及新思路[J].稀土,2014,35(1):1.(GUO Cai-sheng,LI Mei,LIU Shao-gang.The comprehensive utilization present situation and the new way of thinking of Baiyun obo,niobium rare earth resources[J].Chinese Rare Earths,2014,35(1):1.
[3]张家元,方觉.包头铌铁矿冶炼实验研究[J].湖南冶金,2004,3(2):8.(ZHANG Jia-yuan,FANG Jue.Experiment research on smelting of Baotou niobium ore[J].Hunan Metallurgy,2004,3(2):8.)
[4]林东鲁.白云鄂博特殊矿采选冶工艺攻关与技术进步[M].北京:冶金工业出版社,2007.(LIN Dong-lu.Bayan Obo Ore Mining Smelting Technology Research and Special Technical Progress[M].Beijing:Metallurgical Industry Press,2007.)
[5]张去非.我国铌资源开发利用的现状及可行性[J].中国矿业,2003,12(6):26.(ZHANG Qu-fei.Present situation and the feasibility of niobium resources development and utilization in our country[J].China Mining,2003,12(6):26.)
[6]徐掌印,赵增武,姜银举,等.含铌铁水直接冶炼含铌微合金钢的试验[J].钢铁,2015,50(4):13.(XU Zhang-yin,ZHAO Zeng-wu,JIANG Yin-ju,et al.Experiment on Nb-bearing microalloyed steel made directly by Nb-bearing hot metal[J].Iron and Steel,2015,50(4):13.)
[7]马伟.铌精矿内配炭球团预还原技术条件的研究[J].稀有金属与硬质合金,1995,12(123):2.(MA Wei.The study of inside of niobium concentrate with carbon pellet prereduction technical conditions[J].Rare Metals and Cemented Carbide,1995,12(123):2.)
[8]陈宏.直接还原法在铌提取上的应用[J].宝钢技术,1998(5):26.(CHEN Hong.Application of direct reduction in the extraction of niobium[J].Baosteel Technology,1998(5):26.)
[9]范国锋,卿山,王华.高磷铁矿直接熔融还原动力学研究[J].昆明理工大学学报,2012,10(5):18.(FAN Guo-feng,QING Shan,WANG Hua.Kinetic research for direct smelting reduction of high-phosphorus iron ore[J].Journal of Kunming University of Science and Technology:2012,10(5):18.)
[10]江礼科,邱礼有,梁斌,等.氟磷灰石热炭固态还原反应机理[J].成都科技大学学报,1995,9(1):1.(JIANG Li-ke,QIU Liyou,LIANG Bin.Fluorapatite hot carbon reduction reaction mechanism of solid state[J].Journal of Chengdu University of Science and Technology,1995,9(1):1.)
[11]陈义胜,田甜.含铌铁矿粉氢气选择性还原实验研究[J].内蒙古科技大学学报,2014,33(11):192.(CHEN Yi-sheng,TIAN Tian.Experimental study on hydrogen selective-reduction of Nb-bearing iron ore powder[J].Journal of Inner Mongolia University of Science and Technology,2014,33(11):192.)
[2]郭财胜,李梅,柳召刚.白云鄂博稀土、铌资源综合利用现状及新思路[J].稀土,2014,35(1):1.(GUO Cai-sheng,LI Mei,LIU Shao-gang.The comprehensive utilization present situation and the new way of thinking of Baiyun obo,niobium rare earth resources[J].Chinese Rare Earths,2014,35(1):1.
[3]张家元,方觉.包头铌铁矿冶炼实验研究[J].湖南冶金,2004,3(2):8.(ZHANG Jia-yuan,FANG Jue.Experiment research on smelting of Baotou niobium ore[J].Hunan Metallurgy,2004,3(2):8.)
[4]林东鲁.白云鄂博特殊矿采选冶工艺攻关与技术进步[M].北京:冶金工业出版社,2007.(LIN Dong-lu.Bayan Obo Ore Mining Smelting Technology Research and Special Technical Progress[M].Beijing:Metallurgical Industry Press,2007.)
[5]张去非.我国铌资源开发利用的现状及可行性[J].中国矿业,2003,12(6):26.(ZHANG Qu-fei.Present situation and the feasibility of niobium resources development and utilization in our country[J].China Mining,2003,12(6):26.)
[6]徐掌印,赵增武,姜银举,等.含铌铁水直接冶炼含铌微合金钢的试验[J].钢铁,2015,50(4):13.(XU Zhang-yin,ZHAO Zeng-wu,JIANG Yin-ju,et al.Experiment on Nb-bearing microalloyed steel made directly by Nb-bearing hot metal[J].Iron and Steel,2015,50(4):13.)
[7]马伟.铌精矿内配炭球团预还原技术条件的研究[J].稀有金属与硬质合金,1995,12(123):2.(MA Wei.The study of inside of niobium concentrate with carbon pellet prereduction technical conditions[J].Rare Metals and Cemented Carbide,1995,12(123):2.)
[8]陈宏.直接还原法在铌提取上的应用[J].宝钢技术,1998(5):26.(CHEN Hong.Application of direct reduction in the extraction of niobium[J].Baosteel Technology,1998(5):26.)
[9]范国锋,卿山,王华.高磷铁矿直接熔融还原动力学研究[J].昆明理工大学学报,2012,10(5):18.(FAN Guo-feng,QING Shan,WANG Hua.Kinetic research for direct smelting reduction of high-phosphorus iron ore[J].Journal of Kunming University of Science and Technology:2012,10(5):18.)
[10]江礼科,邱礼有,梁斌,等.氟磷灰石热炭固态还原反应机理[J].成都科技大学学报,1995,9(1):1.(JIANG Li-ke,QIU Liyou,LIANG Bin.Fluorapatite hot carbon reduction reaction mechanism of solid state[J].Journal of Chengdu University of Science and Technology,1995,9(1):1.)
[11]陈义胜,田甜.含铌铁矿粉氢气选择性还原实验研究[J].内蒙古科技大学学报,2014,33(11):192.(CHEN Yi-sheng,TIAN Tian.Experimental study on hydrogen selective-reduction of Nb-bearing iron ore powder[J].Journal of Inner Mongolia University of Science and Technology,2014,33(11):192.)