为揭示高铅渣的高温挥发行为，以PbO?FeOx?CaO?SiO2?ZnO为基本渣系，借助热重分析技术，建立了质量比FeO/SiO2=1.8和CaO/SiO2=0.6、不同PbO含量的高铅渣高温挥发本征动力学模型，探讨了不同PbO含量下随温度变化熔渣的挥发特性，结合挥发后熔渣物相和元素分析，揭示了高铅渣的挥发规律. 结果表明，温度高于700℃时，高铅渣中PbO挥发最剧烈，造成渣成分波动导致测定结果偏差；含铅量为20wt%、温度700?1450℃的平均挥发率为18.58%；高铅渣高温挥发受三维扩散控制，影响因素为PbO和硅氧复合离子的含量.
In order to reveal the volatilization characteristics of lead-containing slag, volatilization dynamics model of lead-containing slag with mass ratios of FeO/SiO2=1.8 and CaO/SiO2=0.6 at high temperature was developed using TG technique based on PbO?FeOx?CaO?SiO2?ZnO system. The effect of PbO content on volatility in lead slag was discussed. The volatile mechanism of lead slag was revealed combined with the chemical composition analysis and element analysis of the final slag. The results showed that it was exactly the severe volatilization of PbO at 700?1450℃ that lead to the change of lead composition and the deviation of its performance. Average mass loss rate is about 18.58% of slag containing 20wt% lead at 700?1450℃. The process of high temperature volatilization for lead-containing slag is controlled by 3D diffusion, the factors that affect the volatile are mainly the contents of PbO and silicon oxygen compound ion.
[1]王成彦, 郜伟, 尹飞.国内外铅冶炼技术现状及发展趋势[J].有色金属(冶炼部分), 2012, 64(4):1-5
[2]汪金良, 吴艳新, 张文海.铅冶炼技术的发展现状及旋涡闪速炼铅工艺[J].有色金属科学与工程, 2011, 02(1):14-18
[3]陈会成.液态高铅渣直接还原新工艺的研发及生产[J].世界有色金属, 2010, 26(8):46-48
[4]李若贵.我国铅锌冶炼工艺现状及发展[J].中国有色冶金, 2010, 39(6):13-20
[5]M.等[J].Transactions of Nonferrous Metals Society of China, 2012, 22(3):665-674
[6]Ducret A C, Rankin W J.Liquidus temperatures and viscosities of FeO- Fe2O3 -SiO2 -CaO-MgO slags at compositions relevant to nickel matte smelting[J].Scandinavian Journal of Metallurgy, 2002, 31(1):59-67
[7]郭子亮, 崔雅茹, 赵俊学, 等.高铅渣物理化学性能测定的偏差规律[J].辽宁科技大学学报, 2016, 39(1):47-51
[8]崔雅茹, 李凯茂, 何江山, 等.液态高铅渣还原过程炉渣熔化温度的研究[J].稀有金属, 2013, 37(3):473-478
[9]赵俊学, 葛蓓蕾, 崔雅茹, 等.含易挥发组元炉渣的高温性能检测[J].工业加热, 2016, 45(2):12-13
[10]陈艳梅, 赵俊学.电渣冶金过程炉渣成分变化及其影响研究[J].工业加热, 2014, 43(3):23-25
[11]Nakada H, Mihara N, Kawaguchi Y, et al.Volatilization behavior of lead from molten slag under conditions simulating municipal solid waste melting[J].Journal of Material Cycles and Waste Management, 2008, 10(1):19-23
[12]WANG, Dongyan, ZHANG, et al.Study on the volatilization kinetics of zinc in carbon-containing pellets made of Zn-bearing dusts[J].Baosteel Technical Research, 2013, 7(3):46-49
[13]Yoo J M, Kim B S, Lee J C, et al.Kinetics of the Volatilization Removal of Lead in Electric Arc Furnace Dust[J].Materials Transactions, 2005, 46(2):323-328
[14]Matsuda H, Kageyama H, Kawaguchi Y, et al.Dynamic studies on lead volatilization from CaO–SiO2 –Al2O3,molten slag under N2 –CO–CO2,N2–HCl and N2 –H2S gas atmospheres[J].Journal of Material Cycles and Waste Management, 2014, 16(4):677-683
[15]胡荣祖.热分析动力学(第2版)[M]. 科学出版社, 2008.
[16]李润东, 李彦龙, 王雷, 等.空气气氛下高温挥发的热力学和动力学分析[J].燃烧科学与技术, 2010, 8(1):30-34
[17]侯方振.非定温热分析法在煤粉燃烧动力学研究中的应用[J].煤质技术, 2011, 26(5):56-57
[18]匡敬忠, 徐力勇, 原伟泉.对高岭石热分解动力学的影响[J].材料导报, 2015, 29(22):124-129
[19]葛琦, 王恒, 满毅, 等.煤挥发分质量分数对其热反应动力学性质影响[J].化学工程, 2014, 42(10):59-63
[20]李博, 魏永刚, 王华.红土镍矿的固相还原动力学[J].过程工程学报, 2011, 11(5):767-771
[21]张斌, 刘建忠, 赵卫东, 等.褐煤自燃特性热重实验及动力学分析[J].热力发电, 2014, 43(6):71-76
[22]巨建涛, 吕振林, 焦志远, 等.CaF2-SiO2-CaO渣系的非等温挥发行为[J].过程工程学报, 2012, 12(4):82-88
[23]葛琦, 王恒, 满毅, 等.粒度对赤泥直接还原动力学的影响[J].化工进展, 2014, 33(12):3215-3220
[24]李解, 韩磊, 李保卫, 等.微波场中生物炭还原褐铁矿反应动力学实验及模型计算[J].过程工程学报, 2014, 14(6):973-978
[25]孙云娟, 蒋剑春, 王燕杰, 等.积分法研究生物质与煤单独热解和共热解动力学特性[J].林产化学与工业, 2014, 34(5):8-14
[26]Nakada H, Mihara N, Kawaguchi Y, et al.Volatilization behavior of lead from molten slag under conditions simulating municipal solid waste melting[J].Journal of Material Cycles and Waste Management, 2008, 10(1):19-23
