Effect of basicity on quality of magnesium fluxed pellets
LI Jie1，XIN Zi-cheng1，YANG Ai-min2，ZHANG Yu-zhu1，LIU Lian-ji3，SONG Ya-xian3
（1. College of Metallurgy and Energy， North China University of Science and Technology，Tangshan 063009， Hebei，China 2. College of Science， North China University of Science and Technology， Tangshan 063009， Hebei， China 3. Chief Engineer Office， Hesteel Group Tangsteel Co.， Ltd.，Tangshan 063009， Hebei， China）
Abstract：In order to improve the quality of magnesium fluxed pellets， Tangsteel iron ore concentrated as the raw material in the experiment， the pelleting and roasting experiments were carried out. The effect of basicity on the quality of magnesium fluxed pellets was analyzed， combining with the analysis of the change rules of ore phase structure. The results show that with the increase of basicity， the intensity of green pellets decreases slightly and the decrepitation temperature decreases. When the basicity is more than 1.2， the decrepitation temperature decreases sharply， and compressive strength of pellets increases. When the basicity is more than 1.2， compressive strength decreases sharply; low temperature reduction degradation is effected slightly， low temperature reduction degradation is basically over 90%， and the softening start temperature increases. With the increase of basicity， the content of calcium ferrite increases， and the grain grows and the porosity decreases firstly and then increases. The bonding rate of pellets increases， the basicity increases by 0.1 and the bonding rate increases by 1.4%.
李 杰，信自成，杨爱民，张玉柱，刘连继，宋亚贤. 碱度对镁质熔剂性球团性能的影响[J]. 钢铁, 2017, 52(7): 35-41.
LI Jie，XIN Zi-cheng，YANG Ai-min，ZHANG Yu-zhu，LIU Lian-ji，SONG Ya-xian. Effect of basicity on quality of magnesium fluxed pellets. Iron and Steel, 2017, 52(7): 35-41.
2017, Vol. 52 
