钒钛磁铁矿金属化球团还原熔分试验及渣相分析
|
摘要
通过单因素试验考察了熔分温度、熔分时间和球团碱度对钒钛磁铁矿金属化球团熔分效果的影响,利用Factsage软件计算了不同碱度配比下的渣系三元相图,并结合XRD分析了熔分渣系特点,解释钒钛磁铁矿金属化球团还原熔分过程。结果表明,适当提高熔分温度、熔分时间和球团碱度有利于渣铁分离,但球团碱度超过1.0后,由于三元渣系组成移动到了高温区,使熔渣熔化性温度升高;熔分时间超过40min后,渣系中TiN逐渐增多,增加了熔渣的黏度,不利于渣铁分离。金属化球团熔分还原的最优条件为熔分温度1 550℃、球团碱度R=1.0、熔分时间40min。
Effects of smelting temperature,smelting time and basicity of metallized pellets of vanadium-titanium magnetite were investigated by single factor experiments.Thermodynamics diagram of CaO-SiO2-TiO2 system under various basicity was drawn by Factsage software.Characteristics of smelting slag were analyzed with XRD,and smelting-separation process for metallized pellets of vanadium-titanium magnetite was studied.The results demonstrate that appropriate increase of smelting temperature,smelting time and basicity of metallized pellets are beneficial for slag-iron separation.When basicity of metallized pellets exceeds 1.0,melting temperature of slag rises due to composition of slag system reaching to high temperature zone.When smelting time exceeds 40 min,TiN content gradually rises in slag to increase viscosity of slag and impedes slag-iron separation.The optimum smelting-separation conditions of metallized pellets include smelting temperature of 1 550 ℃,smelting time of 40 min,and basicity of R=1.0.
Effects of smelting temperature,smelting time and basicity of metallized pellets of vanadium-titanium magnetite were investigated by single factor experiments.Thermodynamics diagram of CaO-SiO2-TiO2 system under various basicity was drawn by Factsage software.Characteristics of smelting slag were analyzed with XRD,and smelting-separation process for metallized pellets of vanadium-titanium magnetite was studied.The results demonstrate that appropriate increase of smelting temperature,smelting time and basicity of metallized pellets are beneficial for slag-iron separation.When basicity of metallized pellets exceeds 1.0,melting temperature of slag rises due to composition of slag system reaching to high temperature zone.When smelting time exceeds 40 min,TiN content gradually rises in slag to increase viscosity of slag and impedes slag-iron separation.The optimum smelting-separation conditions of metallized pellets include smelting temperature of 1 550 ℃,smelting time of 40 min,and basicity of R=1.0.
引文
[1]储满生,唐珏,柳政根,等.高铬型钒钛磁铁矿综合利用现状及进展[J].钢铁研究学报,2017,29(5):335-344.
[2]邓君,薛逊,刘功国.攀钢钒钛磁铁矿资源综合利用现状与发展[J].材料与冶金学报,2007,6(2):83-86.
[3]SAMANTA S,GOSWAMI M C,BAIDYA T K,et al.Mineralogy and carbothemal reduction behaviour of vanadium-bearing titaniferous magnetite ore in eastern India[J].International Journal of Minerals Metallurgy and Materials,2013,20(10):917-919.
[4]苟淑云.对提高攀枝花钛资源利用率的思考[J].钢铁钒钛,2009,30(3):89-92.
[5]孙瑜,董越,郑海燕,等.钒钛磁铁矿直接还原试验研究[J].东北大学学报(自然科学版),2015,36(1):63-66.
[6]刘征建,杨广庆,薛庆国,等.钒钛磁铁矿含碳球团转底炉直接还原试验研究[J].过程工程学报,2009,9(3):58-60.
[7]陈艳,白晨光,吉川昇,等.微波场中加热高钛高炉渣的数值模拟[J].钢铁研究学报,2013,25(2):14-18.
[8]OZTURK B,FRUEHAN R.Effect of temperature on slag foaming[J].Metallurgy and Materials Transactions,2013,26B(4):1086.
[9]LIU Y H,LV X W,BAI C G.Density of the blast furnace slag bearing TiO2 at 1673K[J].ISIJ International,2014,54(9):2017.
[10]张艳华,龙红明,春铁军,等.钒钛磁铁矿深度直接还原熔分提铁[J].钢铁研究学报,2016,28(9):17-23.
[11]贾景岩,朱红波,彭金辉,等.微波复合还原剂还原钛铁矿试验[J].钢铁研究学报,2014,26(9):14-18.
[12]郭宇峰,隋裕雷,等.钒钛磁铁矿还原磨选法含钒钛尾渣提钒研究[J].钢铁钒钛,2014,35(2):9-11.
[13]曹明明,张建良,邢相栋,等.钒钛磁铁矿含碳球团的还原机制[J].钢铁,2012,47(8):5-12.
[14]CHEN S Y,FU X J,CHU M S,et al.Carbothermic reduction mechanism of vanadium-titanium magnetite[J].Journal of Iron and Steel Research,2016,23(5):409-414.
[15]吕亚男,郭宇峰,陈栋.添加剂强化钒钛磁铁精矿还原的研究[J].有色金属(冶炼部分),2016(6):9-12.
[16]洪陆阔,齐渊洪,孙彩娇,等.钒钛磁铁矿金属化球团还原熔分试验研究[J].钢铁钒钛,2017,38(5):107-113.
[17]WU E H,ZHU R,YANG S L,et al.Influences of technological parameters on smelting-separation process for metallized pellets of vanadium-bearing titanomagnetite concentrates[J].Journal of Iron and Steel Research,2016,23(7):655-659.
[2]邓君,薛逊,刘功国.攀钢钒钛磁铁矿资源综合利用现状与发展[J].材料与冶金学报,2007,6(2):83-86.
[3]SAMANTA S,GOSWAMI M C,BAIDYA T K,et al.Mineralogy and carbothemal reduction behaviour of vanadium-bearing titaniferous magnetite ore in eastern India[J].International Journal of Minerals Metallurgy and Materials,2013,20(10):917-919.
[4]苟淑云.对提高攀枝花钛资源利用率的思考[J].钢铁钒钛,2009,30(3):89-92.
[5]孙瑜,董越,郑海燕,等.钒钛磁铁矿直接还原试验研究[J].东北大学学报(自然科学版),2015,36(1):63-66.
[6]刘征建,杨广庆,薛庆国,等.钒钛磁铁矿含碳球团转底炉直接还原试验研究[J].过程工程学报,2009,9(3):58-60.
[7]陈艳,白晨光,吉川昇,等.微波场中加热高钛高炉渣的数值模拟[J].钢铁研究学报,2013,25(2):14-18.
[8]OZTURK B,FRUEHAN R.Effect of temperature on slag foaming[J].Metallurgy and Materials Transactions,2013,26B(4):1086.
[9]LIU Y H,LV X W,BAI C G.Density of the blast furnace slag bearing TiO2 at 1673K[J].ISIJ International,2014,54(9):2017.
[10]张艳华,龙红明,春铁军,等.钒钛磁铁矿深度直接还原熔分提铁[J].钢铁研究学报,2016,28(9):17-23.
[11]贾景岩,朱红波,彭金辉,等.微波复合还原剂还原钛铁矿试验[J].钢铁研究学报,2014,26(9):14-18.
[12]郭宇峰,隋裕雷,等.钒钛磁铁矿还原磨选法含钒钛尾渣提钒研究[J].钢铁钒钛,2014,35(2):9-11.
[13]曹明明,张建良,邢相栋,等.钒钛磁铁矿含碳球团的还原机制[J].钢铁,2012,47(8):5-12.
[14]CHEN S Y,FU X J,CHU M S,et al.Carbothermic reduction mechanism of vanadium-titanium magnetite[J].Journal of Iron and Steel Research,2016,23(5):409-414.
[15]吕亚男,郭宇峰,陈栋.添加剂强化钒钛磁铁精矿还原的研究[J].有色金属(冶炼部分),2016(6):9-12.
[16]洪陆阔,齐渊洪,孙彩娇,等.钒钛磁铁矿金属化球团还原熔分试验研究[J].钢铁钒钛,2017,38(5):107-113.
[17]WU E H,ZHU R,YANG S L,et al.Influences of technological parameters on smelting-separation process for metallized pellets of vanadium-bearing titanomagnetite concentrates[J].Journal of Iron and Steel Research,2016,23(7):655-659.