| In recent years, with the rapid development of Chinese iron and steel industry,as the core additive molybdenum alloy iron in iron and steel industry, molybdenum alloy iron has consumed more and more. The study chooses two molybdenum-containing industrial waste produced in manufacturing high carbon molybdenum trioxide in a company as the main raw material, carbon as the reducing agent to implement the molybdenum alloy melting experiments, and get ferro-molybdenum with 50% molybdenum content, so as to recycle Mo element in industrial waste residue carried molybdenum. The experimental research aims at probing the theoretical basis of using molybdenum-containing industrial waste residue to melt the molybdenum alloy and the effects of variables such as melting temperature, alkalinity and holding time on the Mo recovery in industrial waste residue containing molybdenum. Through experimental data and theoretical calculations, the paper has determined the molybdenum alloy smelting recipes using industrial waste residue containing molybdenum, the optimal smelting temperature, alkalinity and holding time, and reached the following conclusions:(1)When holding time t is 10 min and 15 min, the Mo recovery of industrial waste residue containing molybdenum is low, with 69.24% and 84.02% respectively. When the holding time prolongs to 20 min, Mo recovery increases to 93.46% from 84.02%, which is a large amplification. However, when prolonging the holding time again, Mo recovery does not change significantly, remaining at about 93%.(2)When the smelting temperature is 1450 ℃, the Mo recovery in molybdenum-containing industrial waste is only 70.23%; but when the temperature rises to 1500 ℃, Mo recovery increases significantly from 70.23% to 94.43%. Thereafter, when raising the smelting temperature from 1500℃ to 1550℃, Mo recovery remains at about 93%, basically unchanged. Besides, with temperature increasing, Mo’s burning rate changes irregularly, fluctuated between 3% and 4%.(3)When alkalinity R is between 1.10 ~ 1.25, the Mo recovery in the molybdenum-containing industrial waste residue is stabilized at around 93.5%. But when alkalinity R increases from 1.25 to 1.30, Mo recovery decreases significantly, falling from about 94.24% to 86.04%.(4) Increased carbon content can be increased molybdenum-containing industrial waste recovery in Mo, but Mo recovery limited increase and will also result in C, Cu, Si and other impurities content exceeds requirements.(5)Holding time, melting temperature, alkalinity R on other elements in different degrees of impact. Through a lot of melting experiments and data analysis, summed up ferromolybdenum each impurity elements in the holding time t = 20 min, alkalinity R = 1.20, lower melting temperature T = 1500℃ experimental conditions to meet the requirements. |
