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基于电硅热法冶炼钒铁过程中底吹氮气进行实验室模拟,初步探讨了底吹氮气进行渗氮的生产工艺。以实验室高温管式炉为平台,以50钒铁为原料,研究不同温度和不同吹氮流量下渗氮工艺对钒铁渗氮效果的影响。研究结果表明:在Fe-V-N三元体系中,w(N)最大可以达到8%~9%;本次实验室研究中,最佳增氮效果的实验条件为温度1 650℃,氮气流量225 mL/min,吹氮时间120 min,该条件下最大的渗氮量可以达到4.34%。
Based on the laboratory simulation of nitrogen blowing at the bottom during the process of smelting ferrovanadium by electric silicon thermal method, the production process of nitriding at the bottom of nitrogen blowing was discussed. Taking high-temperature tubular furnace as a platform and 50 vanadium-iron as raw material, the effects of nitriding process on the nitriding effect of vanadium and iron at different temperatures and nitrogen blowing rates were studied. The results show that the maximum w (N) can reach 8% ~ 9% in the Fe-VN ternary system. The experimental conditions for the optimum nitrogen addition in the laboratory are the temperature of 1 650 ℃, the nitrogen flow rate of 225 mL / min, nitrogen blowing time 120 min, the maximum nitriding under this condition can reach 4.34%.