Preparation of V-Ti magnetite ore basic pellet containing NaOH
CHENG Xiang-kui1, ZHAO Ying-tao1, ZHAO Xu1, WANG Jun1, HUANG Xiao-li2, PU Chun-lei3
1. International Research Institute of Vanadium and Titanium, Panzhihua University, Panzhihua 617000, Sichuan, China; 2. Technological Institute of Development and Studies, Panzhihua 617000, Sichuan, China; 3. Intelligent Development Department, MCC Huatian Engineering and Technology Corporation, Nanjing 210019, Jiangsu, China
Abstract：The main purpose is to better explore the technology of low temperature reduction and melting of basic pellets of vanadium titanium magnetite concentrate, the V-Ti magnetite ore basic pellet containing NaOH was prepared with V-Ti-bearing magnetite concentrate and coke powder. Effects of water content, balling pressure, binder content and NaOH addition on the drop strength of pellet and the effect of the temperature on the thermal cracking resistance of pellet were investigated. It was found that falling numbers of V-Ti magnetite ore basic pellets increased with the increase of balling pressure, PVA concentration and addition of NaOH, but an increase in water content made the drop number of pellets increase firstly, and then decrease. The optimal process parameters of the pellet containing NaOH were that the water addition, polyvinyl alcohol concentration, balling pressure, and NaOH addition were 6%, 0.4%,10 MPa and 4%, respectively. The thermal cracking resistance of raw pellets and dry pellets was investigated under the optimum technological parameters of alkaline pellets preparation. The thermal cracking resistance of raw pellets and dry pellets decreased with the increase of temperature, but at the same temperature, the thermal cracking resistance of dry pellets was better than that of green pellets.
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2020, Vol. 55 
