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首页> 外文期刊>ISIJ international >Recovery Rate of Chromium from Stainless Slag by Iron Melts
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Recovery Rate of Chromium from Stainless Slag by Iron Melts

机译：铁熔体从不锈钢渣中回收铬的速率

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摘要

The kinetic behavior of Cr_2O_3 reduction by iron melts containing carbon, aluminum and silicon were investigated at various conditions in order to understand effective slag treatment for recovery of chromium from stainless slag. It was found that the recovery rate of chromium was fairly slow, but it was considerably accelerated by the addition of some fluxes, such as Al_2O_3 and SiO_2 to the slag, which promoted the formation of liquid slag at the early stage of the reaction, and the recovery ratio of chromium was also improved. In addition, SiO_2 addition was more effective for increasing the chromium recovery than Al_2O_3 addition due to the effect of CaO/SiO_2 ratio of slag on the reduction rate of Cr_2O_3 in slag. The experimental results were well simulated by the previous kinetic reaction model based on two-film theory. The modeling study showed that the transfer rate of chromium from slag to metal was controlled by the mass transport in the slag phase.
机译：为了了解有效的炉渣处理以从不锈钢炉渣中回收铬的方法，研究了在各种条件下含碳，铝和硅的铁水还原Cr_2O_3的动力学行为。发现铬的回收率相当慢，但是通过向炉渣中添加一些助熔剂（例如Al_2O_3和SiO_2）大大加快了铬的回收速度，这促进了反应初期液体渣的形成，并且铬的回收率也有所提高。另外，由于渣的CaO / SiO_2比对渣中Cr_2O_3的还原率的影响，SiO_2的添加比Al_2O_3的添加更有效地提高了铬的回收率。实验结果被先前基于两层膜理论的动力学反应模型很好地模拟。模拟研究表明，铬从炉渣向金属的转移速率受炉渣相中的传质控制。

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