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探索了一种采用转炉由高碳铬铁“一步法”冶炼中低碳铬铁的新工艺.该工艺与氩氧混吹脱碳法(Argon Oxygen Decarburization,AOD)类似,不同之处在于用CO_2代替氩气作为搅拌气体吹入熔池.实验结果表明:采用CO_2对高、中碳铬铁脱碳是可行的;在高碳铬铁冶炼中碳铬铁初始阶段大量喷吹CO_2能取得更好的脱碳效果,而在冶炼后期,高比例的O_2适量添加CO_2则更有利于脱碳,在当前实验条件下,较佳的脱碳气氛为25%CO_2+75%O_2(体积分数);CO_2的引入对提高铬的回收率有积极作用,同时CO_2含量越高,保铬效果越好.实验同时发现,CO_2对高碳铬铁脱硫有积极作用.
A new process for smelting medium and low carbon ferrochromium from high carbon ferrochrome “one step process” was explored, which is similar to Argon Oxygen Decarburization (AOD) except that Carbon dioxide instead of argon was blown into the molten pool as the stirring gas.The experimental results show that it is feasible to use CO_2 to decarburize high and medium carbon ferrochromium.A large amount of CO 2 can be obtained in the initial stage of carbon ferrochrome smelting in high carbon ferrochrome In the later stage of smelting, the higher proportion of O 2 added with CO 2 is more favorable for decarburization. Under the current experimental conditions, the preferred decarburization atmosphere is 25% CO 2 + 75% O 2 (volume fraction) ; The introduction of CO 2 has a positive effect on increasing the recovery of chromium, and the higher the CO 2 content, the better the effect of chrome preservation. The experiment also found that CO 2 has a positive effect on the desulfurization of high-carbon ferrochrome.