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研究了不同温度和不同时间条件下C还原Fe--Cr--O体系所得产物的形态,样品主要包括FeCr2O4+C和Fe2O3+2Cr2O3+C两种体系.两种样品的还原度均随温度升高而升高,反应接近平衡时还原率均在90%以上.C还原FeCr2O4和Fe2O3--Cr2O3的过程大致相同,且最终还原产物基本组成均为Fe--Cr--C合金和金属碳化物(主要为Cr7C3).针对最终还原产物中Fe--Cr--C合金和金属碳化物的含量提出了一种估算方法,其估算结果与理论计算结果基本吻合.结果显示,最终产物中Fe--Cr--C合金量随温度升高而升高,碳化物含量随温度升高而降低,且不同温度条件下所获得的Fe--Cr--C合金成分不同.
The morphology of the products obtained from C-reduced Fe - Cr - O system at different temperatures and different time were studied. The samples mainly consisted of two systems, FeCr2O4 + C and Fe2O3 + 2Cr2O3 + C. The reducibility of both samples varied with temperature High and high, and the reduction rates are above 90% when the reaction is close to equilibrium.The process of reduction of FeCr2O4 and Fe2O3 - Cr2O3 by C is almost the same, and the final composition of the final reduction products are Fe - Cr - C alloy and metal carbide (Mainly Cr7C3) .A method for estimating the content of Fe - Cr - C alloy and metal carbides in the final reduction product is proposed, and the estimation results agree well with the theoretical calculation results. The results show that the final product of Fe - The amount of Cr - C alloy increased with the increase of temperature, the content of carbide decreased with the increase of temperature, and the composition of Fe - Cr - C alloy was different under different temperature conditions.