基于OxyCup竖炉处理工艺的尘泥团块软熔性能
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摘要
为了使OxyCup竖炉工艺有效处理钢铁企业含铁尘泥,基于OxyCup竖炉工艺,通过改变还原气氛、硅石的添加方式以及荷重研究尘泥团块的软熔性能。结果表明,当φ(CO_2)/(φ(CO)+φ(CO_2))值为0时,尘泥团块的最大压差约为587Pa,软化区间为900~1 030℃,滴落区间为1 191~1 203℃,基本不存在软熔带,随着CO_2体积分数升高,尘泥团块软化区间缩小,滴落区间迅速扩大,软熔层迅速增厚;当φ(CO_2)/(φ(CO)+φ(CO_2))值为1时,尘泥团块软化区间为971~977℃,滴落区间为985~1 192℃,软熔带较厚;硅石层装与硅石混装较硅石内配时,最大压差较低,且熔滴温度区间较窄;不同荷重条件下,尘泥团块的压差变化规律相似,最大压差较小,荷重对尘泥团块的软熔性能影响较小。
In order to make the OxyCup shaft furnace process effectively treat iron dust in steel companies,by changing the reduction atmosphere,the addition way of silica and load,the soft-melting property of dust briquettes in OxyCup shaft furnace was studied.Results showed that when the value ofφ(CO_2)/(φ(CO)+φ(CO_2))was 0,the maximum pressure gradient of dust briquettes was about 587 Pa,with the softening temperature of 900-1 030 ℃,and the dropping temperature was 1 191-1 203℃.At the same time,there was no obvious cohesive zone.With the increase of CO_2 volume percentage,the softening temperature of the dust briquettes decreased,the dropping temperature rapidly increased.When the value ofφ(CO_2)/(φ(CO)+φ(CO_2))was 1,the softening temperature of the dust briquettes was 971-977℃,and the dropping temperature was 985-1 192 ℃,and there was a thick cohesive zone.Compared with the dust-silica briquettes,the maximum pressure gradient was lower,and the temperature range of cohesive zone was narrower by mixing or layering silica.Under different loading conditions,the change rule of pressure gradient was similar,the maximum pressure gradient was small,and the loading had little influence on the softmelting property of dust briquettes.
In order to make the OxyCup shaft furnace process effectively treat iron dust in steel companies,by changing the reduction atmosphere,the addition way of silica and load,the soft-melting property of dust briquettes in OxyCup shaft furnace was studied.Results showed that when the value ofφ(CO_2)/(φ(CO)+φ(CO_2))was 0,the maximum pressure gradient of dust briquettes was about 587 Pa,with the softening temperature of 900-1 030 ℃,and the dropping temperature was 1 191-1 203℃.At the same time,there was no obvious cohesive zone.With the increase of CO_2 volume percentage,the softening temperature of the dust briquettes decreased,the dropping temperature rapidly increased.When the value ofφ(CO_2)/(φ(CO)+φ(CO_2))was 1,the softening temperature of the dust briquettes was 971-977℃,and the dropping temperature was 985-1 192 ℃,and there was a thick cohesive zone.Compared with the dust-silica briquettes,the maximum pressure gradient was lower,and the temperature range of cohesive zone was narrower by mixing or layering silica.Under different loading conditions,the change rule of pressure gradient was similar,the maximum pressure gradient was small,and the loading had little influence on the softmelting property of dust briquettes.
引文
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[2] Kurunov I F.Environmental aspects of industrial technologies for recycling sludge and dust that contain iron and zinc[J].Metallurgist,2012,55(9/10):634.
[3]巨建涛,党要均.钢铁厂含锌粉尘处理工艺的现状及发展[J].材料导报,2014,28(9):109.
[4]毛瑞,张建良,刘征建,等.富氧热风竖炉处理钢铁厂含铁尘泥工艺浅析[C]//第九届中国钢铁年会论文集.北京:中国金属学会,2013:107.
[5] Kesseler K,Erdmann R.OxyCupslag-A new product for demanding markets[J].Thyssenkrupp Techforum,2007(1):22.
[6]赵海泉,齐渊洪,史永林,等.Oxycup工艺处理不锈钢粉尘的试验研究[J].材料与冶金学报,2017,16(1):58.
[7] LI Ke-jiang,ZHANG Jian-liang,LIU Zheng-jian,et al.Comprehensive evaluation of OxyCup process for steelmaking dust treatment based on calculation of mass balance and heat balance[J].Journal of Iron and Steel Research,International,2014,21(6):575.
[8] Michael Lemperle,H Jaan Rachner,韩晓杰.用OxyCup工艺生产铁水[J].世界钢铁,2013,13(2):16.
[9]路俊萍.OxyCup竖炉处理粉尘的应用[J].世界金属导报,2014-07-22(B10).
[10] Thilo Fisch,Klaus Kesseler.一种经济回收钢铁企业中细颗粒含铁、炭副产品的方法——蒂森-克虏伯Oxycup竖炉[C]//环保技术研讨会论文集.北京:中国金属学会,2006:206.
[11]张建良,刘征建,杨天钧.非高炉炼铁[M].北京:冶金工业出版社,2015.
[12]王筱留.钢铁冶金学[M].北京:冶金工业出版社,2000.
[13]谢洪恩,秦兴国,郑魁,等.高钛型高炉渣熔化性温度影响因素分析[J].中国冶金,2017,27(9):13.