烧结矿双级冷却工艺及装备技术研发与应用  

Research and application of two-stage cooling process and equipment technology for sinter

作　　者：张震[1] 温荣耀[1] 廖继勇[1] 谭潇玲 倪桂虎 赵改革 ZHANG Zhen;WEN Rongyao;LIAO Jiyong;TAN Xiaoling;NIN Guihu;ZHAO Gaige(Zhongye Changtian International Engineering Co.,Ltd.,Changsha 410205,Hunan,China;Yongfeng Lingang Co.,Ltd.,Shandong Iron&Steel Group Co.,Ltd.,Lingyi 276624,Shandong,China;Xiangtan Iron&Steel Group Co.,Ltd.,Xiangtan 411102,Hunan,China)

机构地区：[1]中冶长天国际工程有限责任公司,湖南长沙410205 [2]山东钢铁集团永锋临港有限公司,山东临沂276624 [3]湘潭钢铁集团有限公司,湖南湘潭411102

出　　处：《烧结球团》2024年第4期101-106,共6页Sintering and Pelletizing

基　　金：中国五矿科技专项计划(2023-WBKY-023);中冶集团181重大研发项目(2023-WBKY-036)。

摘　　要：烧结行业实践应用的余热回收方式主要是环冷机+余热锅炉与竖式冷却+余热锅炉,而将原烧结给料溜槽改为一级竖式冷却的双级冷却技术,可显著回收高品质余热。本文在介绍烧结双级冷却技术工艺及原理基础上,通过FLUENT流体仿真,对比了烧结双级冷却相对传统环冷机流场和温度场分布,并从冷却提效、余热回收增量、烧结矿增产和除尘增效4方面系统阐述了烧结双级冷却技术效果优势。结果表明,该技术可降低环冷机冷却风量约13%,提高过热蒸汽50℃,降低返矿率1%。该技术在湘潭钢铁新一烧360 m^(2)烧结机成功应用也表明,余热锅炉蒸汽产量可由吨矿约34 t/h增长到约40 t/h,增加发电量约为1200 kW·h年经济效益约为400万元。The main methods of waste heat recovery applied in the sintering industry are annular cooling machine+waste heat boiler and vertical cooling+waste heat boiler.The two stage cooling technology of changing the original sintering feed chute to a single-stage vertical cooling can significantly recover high-quality waste heat.On the basis of introducing the process and principle of sintering two-stage cooling technology,this article compares the flow field and temperature distribution of sintering two-stage cooling with traditional ring cooling machine through FLUENT fluid simulation.The advantages of sintering two-stage cooling technology are systematically explained from four aspects:cooling efficiency improvement,waste heat recovery increment,sintering ore production increase,and dust removal efficiency improvement.The results show that this technology can reduce the cooling air volume of ring cooling machine by about 13%,increase the superheated steam temperature by 50℃,and reduce the return rate by 1%.The successful application of this technology in the 360m^(2) sintering machine of Xiangtan Iron and Steel has shown that the steam production of the waste heat boiler has increased from about 34 t/h to about 40 t/h,increasing the power generation of about 1200 kW,and the annual economic benefit of about 4 million yuan.

关 键 词：烧结双级冷却 流体仿真 环冷机 余热回收 

分 类 号：TF046.4[冶金工程—冶金物理化学]