炼钢污泥对烧结矿矿相结构及冶金性能的影响  

Influence of sludge generated by steelmaking on mineralogical structure and metallurgical performance of sinter

作　　者：承强 张建良[1] 邵久刚 刘征建[1] 王耀祖[1] 牛乐乐 杜诚波 Cheng Qiang;Zhang Jianliang;Shao Jiugang;Liu Zhengjian;Wang Yaozu;Niu Lele;Du Chengbo(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083;Han Steel Company of HBIS Group Co.,Ltd.,Handan 056000,Heibei)

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]河钢集团邯钢公司,河北邯郸056000

出　　处：《烧结球团》2020年第2期61-66,共6页Sintering and Pelletizing

基　　金：水体污染控制与治理科技重大专项资助项目(2017ZX07042001);国家自然科学基金资助项目(51874025);中央高校基本科研业务费专项资金资助项目(FRF-NP-19-004)。

摘　　要：为了明确污泥废水在烧结过程中对烧结矿冶金性能的影响,开展了炼钢污泥对烧结矿还原性、低温还原粉化性以及软熔性能的影响规律的试验研究。结果表明:随着污泥质量分数的增大,烧结矿的还原度指数从78.64%减小至71.51%,还原粉化指数RDI+3.15 mm由59.1%增大至63.7%,软化开始温度由1035℃降至976℃。这主要是由于炼钢污泥中有着一定的C,使烧结过程还原气氛增强,导致烧结矿FeO质量分数上升,还原度指数减小。在荷重软化实验中,烧结矿中的FeO与脉石成分易生成低熔点物质,因此会降低烧结矿的软化开始温度,并且改善烧结矿的低温还原粉化性。本研究可为污泥废水的合理利用提供理论基础。In order to clarify and define the influence of the sludge wastewater on the metallurgical performance of the sinter in the course of sintering,a research is launched about the law of the influence of the proportion of the sludge caused by the steelmaking on the reductibility,degradation at low temperature reduction(RDI)and softening-melting performance of sinter.The research shows:when the mass fraction of sludge increases,the reduction index of the sinter reduces from 78.64%to 71.51%and RDI+3.15 mm increases from 59.1%to 63.7%.The start of softening temperature lowers from 1035℃to 976℃.The main cause is that certain amount of C is existent in the sludge caused by the steelmaking,so that the reduction atmosphere in the course of sintering is reinforced to make the mass fraction of FeO in the sinter rise and the reduction index reduced.In the softening point under load test,the FeO and barren rock in the sintered ore is liable to forming low melting species,which lowers the start of softening temperature of the sinter and improves the low temperature reduction degradation property of the sinter.The research may provide theory base for the rational utilization of the sludge wastewater.

关 键 词：转炉污泥 矿相结构 低温还原粉化 荷重软化熔滴性能 

分 类 号：TF046.4[冶金工程—冶金物理化学] X705[环境科学与工程—环境工程]