The effect of sodium salt on the carburizing of siderite and separation mechanism of iron carbide and gangue were investigated in the process of the preparation of electric furnace raw materials(iron carbide)from lowgrade siderite. The results showed that sodium salt can significantly increase the carburization rate, enhance the growth of iron carbide particles, improve the embedded relationship between iron carbide and gangue, which promotes the separation of iron carbide and gangue. When 15% Na2SO4 or 15% Na2CO3 was added to the pellet, the iron grade, iron recovery and combined carbon content of the magnetic separation concentrate increased from 57.59%, 26.18%, 2.68% to 73.23%, 88.03%, 4.56% or 70.00%, 83.81%, 3.89%, respectively.
唐建国,陈栋,李俊,陈布新,杨东润. 钠盐对低品位菱铁矿制备碳化铁的影响[J]. 中国冶金, 2019, 29(10): 7-12.
TANG Jianguo,CHEN Dong,LI Jun,CHEN Buxin,YANG Dongrun. Effect of sodium salt on preparation of iron #br#
carbide from lowgrade siderite[J]. China Metallurgy, 2019, 29(10): 7-12.