铝硅热法冶炼FeWMo合金  

Production of Ferro-alloy W-Mo-Fe by Silicon-aluminothermy

作　　者：蒋汉祥[1] 孙善长[1] 张廷波[1] 赵秀华[1] 刘中柱[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044

出　　处：《重庆大学学报（自然科学版）》2002年第6期78-80,84,共4页Journal of Chongqing University

摘　　要：根据Si、Al还原WO3 、MoO3 和FeO的ΔGΘ-T图 ,论证了铝硅热法生产FeWMo合金是完全可能的。由SiO2 -Al2 O3 -CaO渣系熔度图和粘度图 ,获得在较低熔化温度和较低粘度状态下渣系的化学组成 ;结合单位炉料的热效应进行配料。研究表明 ,影响W、Mo回收率的主要因素是单位炉料的热效应、还原剂比例及配比、石灰和萤石配比等。采用下列工艺条件 :Q为 2 70 0～ 2 80 0kJ kg炉料 ,k =5 8%～6 0 %,石灰配比为 3%～ 5 %左右 ,可以获得含W35 %左右、Mo30 %左右的FeWMo合金。元素回收率达到ηw91.2 %～ 92 .8%、ηMo92 .0 %～ 93.8%。产品完全可以用于生产WMo系列合金钢 ,该法熔炼设备和工艺简单 ,生产成本低 ,经济效益好 。The principle of Production of Ferro-alloy W-Mo-Fe by Silicon-aluminothermy is discussed on the basis of diagram of Δ G Θ- T of reducing of WO 3 MoO 3 and FeO by silicon and aluminium. The burden calculation of Production of Ferro-alloy W-Mo-Fe by Silicon-aluminothermy is made according to the SiO 2-Al 2O 3-CaO diagram and the thermal unit of burden. Experiments of the reducing of WO 3 MoO 3 and FeO by silicon and aluminium have been carried out. The results are that when the thermal unit of burden is 2 700～2 800 kJ/kg, k =58%～60%, the rate of CaO is 3%～5%,ferro-alloy W-Mo-Fe bearing 35%W 30%Mo can been obtained, the rate of recovery of tungsten and molybdenum are respectively more than 91.2%～92.8% and 92.0%～93.8%. The production cost of this method is low and production equipment is simple.

关 键 词：铝硅热法 钨钼铁合金 回收率 

分 类 号：TF125.1[冶金工程—粉末冶金]