不锈钢粉尘冷态固结球团强度提升优化研究  

Study on strength enhancement and optimization of stainless steel dust cold solidified pellets

作　　者：霍向涛 杨志强 李昊堃[3] 仪桂兰 史永林 张梅 HUO Xiangtao;YANG Zhiqiang;LI Haokun;YI Guilan;SHI Yonglin;ZHANG Mei(State Key Laboratory of Advanced Metallurgy,School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;Shougang Group Research Institute of Technology,Beijing 100043,China;Technology Center,Taiyuan Iron and Steel(Group)Co.,Ltd.,Taiyuan 030003,China)

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室冶金与生态工程学院,北京100083 [2]首钢技术研究院,北京100043 [3]太原钢铁(集团)有限责任公司技术中心,山西太原030003

出　　处：《炼钢》2024年第1期75-80,共6页Steelmaking

基　　金：国家重点研发计划项目(2019YFC1905702)。

摘　　要：2022年不锈钢粗钢年产量达到3197.50万t,生产每吨不锈钢粗钢就会产生18~33 kg粉尘。粉尘中包含大量的铁元素,约占其20%~53%,还含有铬和镍等重金属元素,具有很大的回收价值。以不锈钢粉尘为原料制备了冶金球团,系统研究了水分含量、成型压力、粘结剂种类和粘结剂添加量对不锈钢粉尘球团强度的影响。试验发现当水分添加量为8%、采用5%的蔗糖作为粘结剂、在20 MPa的成型压力下,所得球团的湿球落下强度为5.6次/0.5 m、干球落下强度为12.7次/2 m、干球抗压强度达到了3314 N,均超过了炼钢用尘泥团块的行业标准要求。In 2022,the annual output of stainless steel crude steel has reached 31.975 million tons,and each ton of crude stainless steel produces 18-33 kg of dust.This type of dust contains a large amount of iron with a mass fraction of about 20%-53%,as well as heavy metal elements such as chromium and nickel,which have great recycling value.In this paper,the stainless steel dust was used for pelleting,and the effects of moisture content,molding pressure,binder type and binder addition on the pellet strength were investigated.It was found that when the water content,molding pressure and sucrose binder were controlled at 8%,20 MPa and 5%,respectively,the drop strength of the wet pellets and dry pellets reached 5.6 times/0.5 m and 12.7 times/2 m,respectively,and the compressive strength of the dry pellets reached 3314 N,all of which exceeded the industry standard requirements for steelmaking dust and mud pellets.

关 键 词：不锈钢粉尘 球团 粘结剂 落下强度 抗压强度 

分 类 号：TF764[冶金工程—钢铁冶金]