烧结烟气脱硫灰烧结再利用的研究与应用

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英文篇名：Study and application of recycled desulphurization ash of sintering flue gas 作者：刘杰 ; 马贤国 ; 夏铁玉 ; 周明顺 ; 姜涛 英文作者：Liu Jie;Ma Xianguo;Xia Tieyu;Zhou Mingshun;Jiang Tao;Iron and Steel Research Institute of Angang Group;School of Minerals Processing and Bioengineering,Central South University;Ansteel Company Limited; 关键词：烟气 ; 脱硫灰 ; 烧结 ; 硫质量分数 ; 烧结指标 ; 成球性指数 英文关键词：flue gas;;desulphurization ash;;sintering;;w(S);;sintering index;;ballability index 中文刊名：SJQT 英文刊名：Sintering and Pelletizing 机构：鞍钢集团钢铁研究院;中南大学资源加工与生物工程学院;鞍钢股份有限公司; 出版日期：2019-04-15 出版单位：烧结球团 年：2019 期：v.44 基金：辽宁“百千万人才工程”“百人层次”培养经费资助;; 国家发改委项目《高炉炼铁原料准备技术研究及其平台建设》(辽经科技[2008]195号) 语种：中文; 页：SJQT201902015 页数：6 CN：02 ISSN：43-1133/TF 分类号：67-72

摘要

针对半干法烧结烟气脱硫灰的有效利用,以及降低大量堆存的环保风险等问题。通过实验室和工业试验对鞍钢烧结烟气脱硫灰返回烧结再利用的可行性和关键技术问题进行了研究和评价。结果表明,脱硫灰仍有部分活性,使用时必须进行有效润湿;用迪克逊法进行成球评价,生石灰成球性指数为81.67%,脱硫灰成球性指数为62.65%,脱硫灰成球性差于生石灰,但脱硫灰造球时分散性好;用脱硫灰替代石灰石进行烧结,混合料中大于5mm颗粒增加,烧结技术指标大幅改善,脱硫灰最佳的配比范围为1%～2%。在此范围内,成品烧结矿残硫质量分数增加,烧结过程硫脱除率提高,烟气中硫质量分数成倍增加;工业生产条件下,烧结运行时间不变,料层厚度提高,主管负压下降,烧结料层透气性改善,成品烧结矿主要物理和热态指标未有明显变化。
        In view of effective utilization of desulphurization ash of sintering flue gas and reducing the environment pollution risk of massive stockpiling,the feasibility and the key technical problem for returning desulphurization ash of Ansteel sintering flue gas to sintering and utilization were studied and evaluated by laboratorial and industrial experiment. The results show that the desulphurization ash still has activity,it must be moistened effectively before using. When the Dixon's method is used to evaluate the ballability index,the ballability index of quicklime is 81. 67% and the ballability index of desulphurization ash is 62. 65%,obviously the ballability index of desulphurization ash is worse than that of quicklime,but the dispersity of desulphurization ash is better than that of quicklime during balling. When the desulphurization ash is used to replace the limestone for sintering,the proportion of particles over 5 mm in sintering mixture increases and the sintering technical indexes are improved significantly. The best proportion of the desulphurization ash is 1% ～ 2%,and within this range,the w(S) of product sinter increases,the sulfur removal rate in sintering process is increased,and the w(S) in the flue gas multiplies. Under the industrial production condition,the sintering operation time is not changed,the material bed depth is increased,the negative pressure of main pipe lowers,the permeability of sintering material bed is improved,and there is no obvious change of main physical and thermal indexes of product sinter.

引文

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