低品位复杂矿烧结碱度优化试验
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摘要
为了合理利用新疆区域的贫矿资源,优化高炉炉料结构,开展优化烧结矿碱度的试验研究。利用50 kg烧结杯,针对新疆复杂矿做了7组碱度为1.65~2.00的烧结杯试验。通过对烧结矿机械强度、冶金性能及矿物组成分析,得出碱度为1.80~1.85时,烧结矿中铁酸钙质量分数明显增加,烧结矿的ISO转鼓强度较高,成品率最高达到78%,还原度和低温还原粉化指数均得到改善,软熔区间最窄,为最优的烧结碱度区间;而碱度为1.65~1.75时,转鼓强度降低、熔滴性能变差,处于烧结矿的粉化区间,配加新疆区域复杂矿烧结生产时应避开此碱度区间。
In order to utilize the lean ore resources in Xinjiang rationally and optimize the blast furnace charge structure,the optimizing experiments on sinter basicity were carried out. In view of the complex ore in Xinjiang,Seven groups of sintering pot tests were conducted. The basicity of all these tests changed among 1.65 and 2.00. Through analyzing the mechanical strength,metallurgical properties and mineral composition of sinter,it is concluded that when the alkalinity was between 1.80 to 1.85,an obvious increase of the SFCA content in sinter can be observed,the ISO drum strength of sinter was comparatively high and the yield can be as high as 78%,the reducibility and low temperature reduction desintegration index of sinter were also improved,and the soft melting range was the narrowest. So it is the optimal basicity range of sinter. However,when the basicity was among 1.65 and 1.75,the drum index declined and the property of molten drop became worse. It is the pulverization basicity interval of sinter,therefore considering the complexity of ore in Xinjiang area,this range should be avoided in sintering production.
In order to utilize the lean ore resources in Xinjiang rationally and optimize the blast furnace charge structure,the optimizing experiments on sinter basicity were carried out. In view of the complex ore in Xinjiang,Seven groups of sintering pot tests were conducted. The basicity of all these tests changed among 1.65 and 2.00. Through analyzing the mechanical strength,metallurgical properties and mineral composition of sinter,it is concluded that when the alkalinity was between 1.80 to 1.85,an obvious increase of the SFCA content in sinter can be observed,the ISO drum strength of sinter was comparatively high and the yield can be as high as 78%,the reducibility and low temperature reduction desintegration index of sinter were also improved,and the soft melting range was the narrowest. So it is the optimal basicity range of sinter. However,when the basicity was among 1.65 and 1.75,the drum index declined and the property of molten drop became worse. It is the pulverization basicity interval of sinter,therefore considering the complexity of ore in Xinjiang area,this range should be avoided in sintering production.
引文
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[10]姚君豪,杨军,韩冬,等.添加剂对高Mg O烧结矿中铁酸钙生成的影响[J].钢铁,2015,50(2):16.(YAO Jun-hao,YANG Jun,HAN Dong,et al.Effect of additives on formation of calcium ferrites in magnesiariched sinters[J].Iron and Steel,2015,50(2):16.)
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[12]Panychev A A,Ganin D R.Optimizing the Mg O content of the charge in sintering and blast-furnace smelting[J].Metallurgist,2012,55(5):876.
[13]王海涛,李光辉,范晓慧,等.几种高炉炉料冶金性能的对比研究[J].钢铁,2006,41(1):27.(WANG Hai-tao,LI Guang-hui,FAN Xiao-hui,et al.Comparative study on metallurgical properties of blast furnace burdens[J].Iron and Steel,2006,41(1):27.)
[2]吕庆,张旭升,刘小杰,等.钛对烧结矿基础性能的影响[J].钢铁,2015,50(5):17.(LüQing,ZHANG Xu-sheng,LIU Xiaojie,et al.Influence of titanium on the basic characteristics of sinter[J].Iron and Steel,2015,50(5):17.)
[3]刘东辉,吕庆,邹雷雷,等.混合矿基础特性对钒钛磁铁烧结矿转鼓指数的影响[J].钢铁研究学报,2015,27(1):13.(LIU Dong-hui,LüQing,ZOU Lei-lei,et al.Effect of the basic characteristics of mixed ores on tumbler index of vanadium-titanium sinter[J].Journal of Iron and Steel Research,2015,27(1):13.)
[4]于素荣,周节旺,于淑娟,等.碱度对鞍钢烧结矿产、质量的影响[J].烧结球团,2007,32(5):18.(YU Su-rong,ZHOU Jiewang,YU Su-juan,et al.Influence of alkalinity on production and quality of anshan iron and steel sinter[J].Sintering and Pelletizing,2007,32(5):18.)
[5]李建朝,伊凤永,李福民,等.混合铁矿粉的烧结基础特性[J].钢铁,2013,48(5):10.(LI Jian-chao,YI Feng-yong,LI Fumin,et al.Sintering basic characteristics of blending iron ore[J].Iron and Steel,2013,48(5):10.)
[6]朱贺民.烧结矿碱度、Si O2和Mg O含量对烧结冶金性能的影响[J].钢铁研究,2006,34(4):17.(ZHU He-min.Effect of basicity,Si O2and Mg O contents of sinter on sinter properties[J].Research on Iron and Steel,2006,34(4):17.)
[7]刘竹林,李永清,高泽平.炼铁原料[M].北京:化学工业出版社,2007.(LIU Zhu-lin,LI Yong-qing,GAO Ze-ping.Ironmaking Raw Material[M].Beijing:Chemical Industry Press,2007.)
[8]武轶,金俊,熊德怀.低碱度高镁烧结矿性能的研究[J].钢铁研究,2013,41(3):9.(WU Yi,JIN Jun,XIONG De-huai.Study on properties of low basicity and high w(Mg O)sinter[J].Research on Iron and Steel,2013,41(3):9.)
[9]王喆,张建良,左海滨,等.Al2O3质量分数对高碱度烧结矿软熔滴落性能影响[J].钢铁,2015,50(7):25.(WANG Zhe,ZHANG Jian-liang,ZUO Hai-bin,et al.Influence of Al2O3content on softening-melting property of high basicity sinter[J].Iron and Steel,2015,50(7):25.)
[10]姚君豪,杨军,韩冬,等.添加剂对高Mg O烧结矿中铁酸钙生成的影响[J].钢铁,2015,50(2):16.(YAO Jun-hao,YANG Jun,HAN Dong,et al.Effect of additives on formation of calcium ferrites in magnesiariched sinters[J].Iron and Steel,2015,50(2):16.)
[11]柳政根,储满生,陈立杰,等.烧结矿中Mg O对钒钛矿综合炉料软熔滴落的影响[J].东北大学学报:自然科学版,2015,36(5):659.(LIU Zheng-gen,CHU Man-sheng,CHEN Li-jie,et al.Effects of Mg O content in sinter on softening-dripping behavior of vanadium-titanium magnetite composite burdens[J].Journal of Northeastern University:Natural Science,2015,36(5):659.)
[12]Panychev A A,Ganin D R.Optimizing the Mg O content of the charge in sintering and blast-furnace smelting[J].Metallurgist,2012,55(5):876.
[13]王海涛,李光辉,范晓慧,等.几种高炉炉料冶金性能的对比研究[J].钢铁,2006,41(1):27.(WANG Hai-tao,LI Guang-hui,FAN Xiao-hui,et al.Comparative study on metallurgical properties of blast furnace burdens[J].Iron and Steel,2006,41(1):27.)