1.School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, Hunan， China； 2.School of Geoscience and Environmental Engineering, Central South University, Changsha 410083, Hunan， China
Abstract：Strong fired pellets were produced by simulating gratekiln process to supply highquality charges from some imported manganese ore fines containing high combined water, which was preliminarily pretreated by high press roll grinding. Manganese ore fines assaying 43.09% Mn, 6.49% Fe, and 14.64% LOI, and with 77.81% ranging between 0.5 mm and 8 mm site, are pretreated up to the specific surface areas of 2653 cm2/g and 59.18% passing 0.045 mm by passing the fines through press roller twice in open circuit. The finely ground manganese fines then were mixed with 2.0% bentonite, balled at 16% moisture for 7 min in disc pelletizer, the drop number and compressive strength of green balls reach 23.1 times/0.5 m and 10.20 N per pellet, respectively. After drying in oven, green balls were preheated at 1050 ℃ for 10 minutes and fired at 1340 ℃ for 15 minutes in electric tube furnace, the compressive strength of fired pellets reaches 2711 N per pellet. Therefore, these pellets are high quality burden for blast furnace or electric furnace due to high mechanical strength and high grade of Mn at 49.11% and low detrimental elements.
朱德庆;徐栋梁;潘建;陈栋;张文山. 高结晶水锰矿粉制备高性能球团研究[J]. 钢铁, 2009, 44(5): 11-0.
ZHU Deqing;XU Dongliang;PAN Jian;CHEN Dong;ZHANG Wenshan. Study on High Properties Pellets Produced by Manganese Ore Fines Containing High Combined Water. Iron and Steel, 2009, 44(5): 11-0.
2009, Vol. 44 
