Analysis of reducing factors of zincbearing blast furnace dust
LIU Gang1,2,GAN Yong1,LI Shiqi3,MA Mingtu2,LIU Chong4,CHANG Jin5
(1. Central Iron and Steel Research Institute, China Iron and Steel Research Institute Group, Beijing 100081, China;
2. Automotive Engineering Research and Development Center, China Automotive Engineering Research Institute
Co., Ltd., Chongqing 401122, China;3. School of Metallurgical and Ecological Engineering, University of Science and
Technology Beijing, Beijing 100083, China;4. Central Iron and Steel Reserch Institute, HBIS Group, Shijiazhuang 050023,
Hebei, China;5. Shougang Shuigang Iron and Steel (Group) Co., Ltd., Liupanshui 553028, Guizhou, China)
In order to make full use of the valuable resources such as Fe, C in blast furnace dust, the sintered dust, blast furnace gravitational dust, and fabric filter dust were designed as raw material to form coldbonded pellets with different carbon addition amount. It can not only make up for the disadvantage of single component pelletizing, but also make full use of valuable resources in dust for the selfreduction reaction. The results showed that with the increase of reduction temperature and reaction time, the metallization ratio and dezincification ratio of the pellets increased gradually, and the ideal experimental result was achieved when the reaction temperature was 1 200 ℃. After 10 minutes of reaction, the metallization ratio and dezincification ratio can reach 87.13% and 95.25%, respectively. As the carbon addition amount increased, the metallization ratio and dezincification ratio showed different trends. When the molar ratio of carbon to oxygen was about 1.3, the indicators of the metallization ratio and dezincification ratio showed better.
