烧结循环利用含铁粉尘过程炉箅条防板结防腐蚀技术  

Technology on anti-hardening and anti-corrosion of grate bar during the process of sintering recycling and using iron-bearing dust

作　　者：赵改革[1] 汤乐云[1] 梁高铭[1] 甘敏[2] 范晓慧[2] 尹明东 Zhao Gaige;Tang Leyun;Liang Gaoming;Gan Min;Fan Xiaohui;Yin Mingdong(Hunan Valin Xiangtan Iron&Steel Co.,Ltd.,Xiangtan 411102,Hunan;School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,Hunan;Anhui Shengdong Minhengda Metallurgical Technology Co.,Ltd.,Ma'anshan 243000,Anhui)

机构地区：[1]湖南华菱湘潭钢铁有限公司,湖南湘潭411102 [2]中南大学资源加工与生物工程学院,湖南长沙410083 [3]安徽生东岷恒大冶金科技有限公司,安徽马鞍山243000

出　　处：《烧结球团》2020年第5期19-24,共6页Sintering and Pelletizing

基　　金：国家自然科学基金钢铁联合研究基金资助项目(U1660206)。

摘　　要：针对湘钢在高含铁粉尘循环使用条件下,炉箅条出现板结和腐蚀的机理进行分析,发现炉箅条板结和腐蚀的主要原因包括烧结料层底部凝结水的促进作用、高碱金属氯化物微细粉尘的黏附作用以及炉箅条本身耐腐蚀性较差等。通过开发低水制粒技术、耦合蒸汽预热技术,以及新型防板结炉箅条等措施,炉箅条腐蚀和板结状况得以解决,为厚料层条件烧结的稳定生产和工艺持续改进提供了技术支持,同时还直接消化了大量的含铁粉尘,降低了生产成本。The mechanism of grate bar raising harden and corrosion during the process of recycling and using high ferric dust in Xiangtan Iron & Steel Co.,Ltd.is analyzed.It is found that the main causes of the grate bars harden and corrosion are the acceleration of the condensation at the bottom of the sinter bed,the adhesion of the fine dust with high alkali metal chloride,and its poor corrosion resistance of the grate bar.Through the development of low water granulation technology,the coupled steam preheating technology,the new type of grate bar and other measures,the corrosion and harden of grate bar are solved.It provides technical support for stable production and continuous process improvement of thick bed sintering,while it also digests a lot of iron-bearing dust directly and reduces its processing cost.

关 键 词：炉箅条 板结 腐蚀 含铁粉尘 过湿带 

分 类 号：TF046.4[冶金工程—冶金物理化学]