碱金属在白云鄂博铁精矿还原中的催化作用研究
尤凤霞，赵文广，王永斌，彭军，安胜利
(内蒙古科技大学材料与冶金学院，包头 014010)
摘要：利用失重法对碳的气化反应、CO气体以及碳还原白云鄂博铁精矿进行了实验，使用矿相、XRD分析了还原后样品的相组成与显微结构。研究结果表明：加入催化剂后，碳的气化反应速率和铁精矿还原速率提高，且K2CO3和Na2CO3的催化效果明显优于CaCO3的催化效果。催化剂的加入有助于碳的活性提高，加速了碳的气化反应，从而促进了白云鄂博铁精矿还原反应进行。
关键词：催化作用；碱金属；还原速率；白云鄂博矿
Research on catalytic role of alkali metal in the reduction of Bayan Obo iron concentrate
YOU Feng-xia, ZHAO Wen-guang, WANG Yong-bin, PENG Jun, AN Sheng-li
(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou, 014010, China)
Abstract：The weightlessness method was used in the experiments ofcarbon gasification and the reduction ofBaiyunebo iron concentrate by CO gas and carbon. Then the mineral phases method and XRD were adopted to analyze the microstructure and phase composition of the sample after the reduction. The results prove that the rate of gasification reaction and reduction reaction was increased and the catalytic effect of K2CO3or Na2CO3 is better than that of CaCO3 after the addition of it. The addition of the catalyst is helpful to improve the reactivity ofcarbon, then accelerates the carbon gasification reaction, thus promoting the reduction of Baiyunebo iron ore.
Key words：Catalytic action；Alkalis；Reduction rate; Bayan Oboore gasification reaction