固体燃料分加强化细粒铁精矿烧结技术研究  

Research on sintering technology of fine-grained iron ore concentrate reinforced by solid fuel addition

作　　者：张思平[1] 刘臣 钟强[3] 李浩鸣[1] 王兆才[2] ZHAGN Siping;LIU Chen;ZHONG Qiang;LI Haoming;WANG Zhaocai(Xinyu Steel Group Co.,Ltd.,Xinyu 338000,Jiangxi,China;Zhongye Changtian International Engineering Co.,Ltd.,Changsha 410205,Hunan,China;School of Minerals Processing&Bioengineering,Central South University,Changsha 410083,Hunan,China)

机构地区：[1]新余钢铁集团有限公司,江西新余338000 [2]中冶长天国际工程有限责任公司,湖南长沙410205 [3]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《烧结球团》2023年第3期76-82,共7页Sintering and Pelletizing

基　　金：湖南省科技成果转化及产业化计划资助项目(2020GK4055);中冶长天基础研究基金支助项目(2021JCYJ04)。

摘　　要：针对以细粒铁精矿为主的厚料层烧结,本文采用燃料分加强化技术,研究了二次焦粉配比、焦粉小于0.5 mm粒级质量分数等对细粒铁精矿烧结矿产、质量的影响,分析了烧结产品矿物组成和显微结构的变化。研究结果表明:烧结所用焦粉小于0.5 mm粒级质量分数为51.85%,粒度偏细;在制粒水分为8.0%、焦粉配比为5.3%的优化条件下,通过适宜的燃料(焦粉)分加可提高烧结矿产、质量指标;当二次焦粉配比为50%时,烧结矿的成品率、转鼓强度、利用系数分别在二次焦粉配比为0的基础上提升了1.68%、1.16%、3.64%,固体燃料消耗降低了1.42%;适宜的固体燃料分加可改善烧结矿微观结构,提高结晶良好的针、条状铁酸钙体积分数。Aiming at the sintering of thick material layer dominated by fine-grained iron ore concentrate,a fuel divided addition strengthening technology is used to study the effects of secondary coke powder ratio and coke powder mass fraction of less than 0.5 mm size fraction on the sinter production and quality of fine-grained iron ore concentrate,and the changes of mineral composition and microstructure of sintered products are analyzed.The results show that the mass fraction of less than 0.5 mm size fraction of coke powder used for sintering is 51.85%,and the particle size is small.Under the optimized conditions of granulation moisture of 8.0%and coke powder ratio of 5.3%,the sinter production and quality indexes can be improved by adding suitable fuel(coke powder).When the secondary coke powder ratio is 50%,the yield of sinter,the tumbler strength and utilization coefficient increases by 1.68%,1.16%and 3.64%respectively on the basis of the secondary coke powder ratio of 0,and the solid fuel consumption decreases by 1.42%.Therefore,suitable solid fuel addition can improve the microstructure of sinter and increase the volume fraction of calcium ferrite in needles and strips with good crystallization.

关 键 词：燃料 铁精矿 烧结 燃料分加 烧结指标 铁酸钙 

分 类 号：TF046.4[冶金工程—冶金物理化学]