辉钼矿的造锍熔炼与吹炼

摘要

A novel method of recovering molybdenum directly from gas phase was proposed. A smelting and converting process was put forward based on the new idea, during which molybdenite dissolved in white copper matte and was extracted from the copper molybdenum matte after its oxidization and volatilization. The behavior of molybdenite dissolution in copper matte and the effects of mixture ratio, smelting temperature and air flow were investigated. The results show that molybdenite can be digested completely into copper matte when m(copper matte)/m(molybdenite) is not less than 12:5 (mass ratio) and smelting temperature is above 1150℃. The optimum converting condition is determined as follows:The matte smelting was carried out at 1300℃for 5 h when the mixture ratio of copper matte to molybdenite is 150:30, and then the air was blown into the melt with air flow of 10 L/h at 1300℃for 1 h. The evaporation rate of MoO3 from the molybdenite is up to 70.79%under the optimum condition.%利用重金属冶金中的熔炼技术，采用辉钼矿与白冰铜造锍熔炼、富氧吹炼使钼氧化挥发的新方法，实现辉钼矿中钼的提取，研究造锍过程中白冰铜溶解辉钼矿的行为以及物料配比、吹炼温度和空气流量等因素对MoO3挥发率的影响。结果表明：当冰铜与辉钼矿的质量比不低于12：5、吹炼温度不低于1150℃时，辉钼矿能完全溶解到白冰铜中形成共熔体；优化后的吹炼条件如下：按白冰铜与辉钼矿的质量比为150：30配料混合均匀，将混合物在1300℃下保温5 h，再以10 L/h的气流量吹炼1 h，MoO3的挥发率达到70.79%。