京唐高炉高球比下含铁固废流重构解析
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摘要
京唐二期建成投产后拟将高炉球团比例从30%提高到50%,工艺配置与原料条件发生重大变化。根据循环极限理论推导了烧结矿、高炉除尘灰的钾、钠、锌元素极限含量和高炉钾、钠、锌元素极限入炉负荷。结果表明,京唐二期投产后如果高炉旋风灰仍返回烧结回收使用,将导致高炉入炉锌负荷显著提高,因此提出以高炉稳定顺行为目标的含铁固废流重构技术,将含锌固废集中于转底炉进行脱锌和金属化处理,再返回高炉或转炉使用,确保入炉锌负荷可控。
After the Jingtang 2 nd term is finished and put into production,the BF pellet ratio will be raised from~30%to 50% with the great change of process configuration and raw materials condition.By applying the limit cycle theory,the limit K/Na/Zn content in sinter and BF dust and the limit K/Na/Zn load into BF have been forecast.It is concluded that the Zn load into BF will be increased remarkably after the 2 nd term if BF cyclone dust is still recovered into sintering process.Thus,the restructuring on the ferrous solid waste stream has been proposed for the stable production of BF.The solid waste containing zinc will be dezincified by reducing into the rotary hearth furnace(RHF).Subsequently metallized pellets discharging from RHF will be feed into BF or BOF.As results,the Zn load into BF will be controllable.
After the Jingtang 2 nd term is finished and put into production,the BF pellet ratio will be raised from~30%to 50% with the great change of process configuration and raw materials condition.By applying the limit cycle theory,the limit K/Na/Zn content in sinter and BF dust and the limit K/Na/Zn load into BF have been forecast.It is concluded that the Zn load into BF will be increased remarkably after the 2 nd term if BF cyclone dust is still recovered into sintering process.Thus,the restructuring on the ferrous solid waste stream has been proposed for the stable production of BF.The solid waste containing zinc will be dezincified by reducing into the rotary hearth furnace(RHF).Subsequently metallized pellets discharging from RHF will be feed into BF or BOF.As results,the Zn load into BF will be controllable.
引文
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[3]郑鹏超,张建良,刘征建,等.碱金属对焦炭热性能的影响[J].中国冶金,2017,27(5):19.
[4]郭科,张建良,王广伟,等.ZnO对焦炭气化反应的影响及动力学分析[J].中国冶金,2017,27(10):8.
[5]毕学工,竺龙,李九林,等.锌对炼铁炉料冶金性能影响的试验研究[J].武汉科技大学学报:自然科学版,2016,39(2):81.
[6]李肇毅,姜伟忠.高炉锌负荷对燃料比影响的定量分析[J].炼铁,2016,35(4):15.
[7]徐国涛,向武国,张洪雷,等.高炉热风管道耐火材料内衬含碱金属及锌的粘接物研究[J].武钢技术,2017,55(1):6.
[8]赵贵希,刘其敏.高炉碱负荷和锌负荷的来源透析及对策[J].中国冶金,2014,24(12):51.
[9]周飞,彭其春,陈本强,等.高炉内锌平衡与结瘤的分析[J].中国冶金,2010,20(2):15.
[10]吴斌.衡钢1号高炉锌平衡研究及减轻锌负荷的措施[J].中国冶金,2011,21(3):17.
[11]张鲁芳.我国转底炉处理钢铁厂含锌粉尘技术研究[J].烧结球团,2012,37(3):57.
[12]段世钰,陈永军.转底炉处理钢铁厂尘泥[J].工业炉,2016,38(5):20.