Abstract：The preparation of pellets for blast furnace from the complex iron ores containing tin and zinc (0.25%Sn, 0.20%Zn) were investigated in this paper. Based on the analysis of volatilization behavior of tin and zinc compound in the process of preheating and reduction roasting, the effects of preheating and roasting conditions on the removal of tin, zinc and strength of preheated and roasted pellets were investigated. The thermodynamic analysis indicated that the removal of tin and zinc occurs mainly in the weak reduction roasting stage. The experimental results under the optimal experimental conditions indicated that preheated pellets with compressive strength of 495 N/P and AC tumble index of 3.85%, roasted pellets with compressive strength of 2254N/P and ISO tumble index of 96.16% could be obtained; the volatilization of tin, zinc is 70.8% and 61.0%; the content of tin, zinc is decreased to 0.073%, 0.078% respectively. The finished pellets have good metallurgical performance, which meet the needs of blast furnace.
张元波 韩桂洪 姜 涛 黄艳芳 李光辉 郭宇峰. 含锡锌铁精矿链篦机-回转窑法制备炼铁用球团矿的研究[J]. 钢铁, 2009, 1(6): 0-0.
HAN Gui-Hong . Investigation on Preparation of Pellets for Blast Furnace from Tin, Zinc-bearing Iron Concentrates by Grate-kiln Process. Iron and Steel, 2009, 1(6): 0-0.
2009, Vol. 1 