(1. 鋼研晟華科技股份有限公司，北京 100081；
2. 鋼鐵研究總院 先進鋼鐵流程及材料國家重點實驗室，北京 100081)
摘 要: 采用在鉬精礦真空冶煉過程中添加碳粉的方法，進一步降低鉬精礦真空冶煉過程中主要雜質(zhì)SiO2、MgO、Al2O3和CaO的含量。熱力學計算結(jié)果表明：SiO2、MgO、Al2O3和CaO均有可能與碳發(fā)生反應(yīng)，生成氣態(tài)物質(zhì)被去除。試驗研究結(jié)果表明，在鉬精礦真空冶煉過程中加入碳粉可以明顯降低其中Si、Mg、Al和Ca的含量，其中Si的脫除率約達到100%，Mg的脫除率約達到99.7%，Al的脫除率約達到78.44%，Ca的脫除率最高約為9.8%。采用品位為48%的低品位鉬精礦為原料，經(jīng)過真空冶煉過程，得到的金屬鉬產(chǎn)品中鉬含量達到92%，S含量降至0.69%，主要雜質(zhì)元素SiO2含量降至0.0021%，Cu含量小于0.005%，P含量小于0.005%，Mg含量降至0.001%，Al含量降至0.64%，Ca含量為0.51%。
關(guān)鍵字: 鉬精礦；碳；真空冶煉；雜質(zhì)元素；金屬鉬產(chǎn)品
（1. CISRI SUNWARD Technology Co., Ltd., Beijing 100081, China;
2. State Key Laboratory of Advanced Steel Process and Products, Central Iron and Steel Research Institute, Beijing 100081, China）
Abstract:In order to further reduce the impurities content of SiO2, MgO, Al2O3 and CaO in the vacuum smelting process of molybdenite concentrates, a method of adding carbon powder in the vacuum smelting process of molybdenite concentrates was adopted. Thermodynamic calculation results show that SiO2, MgO, Al2O3 and CaO may react with carbon to generate gaseous substances which can be removed by vacuum pump. The results show that the addition of carbon powder in the vacuum smelting of molybdenite concentrate can significantly reduce the contents of Si, Mg, Al and Ca. The removal rates of Si, Mg, Al can reach about 100%, 99.7%, and 78.44%, respectively. The max removal rate of Ca can reach about 9.8%. When 48% low-grade molybdenite concentrate are used as raw material in the vacuum smelting process, the content of Mo in the metal product can reach 92%, and the content of S decreases to 0.69%. The main impurity SiO2 decreases to 0.0021%, and the contents of Cu and P are all less than 0.005%, and the contents of Mg, Al and Ca are 0.001%, 0.64% and 0.51%, respectively.
Key words: molybdenite concentrates; carbon; vacuum smelting; main impurities; metal Mo
