【作者】 王政； 徐安军；

【Author】 Wang Zheng;Xu Anjun;School of Metallurgy and Ecology Engineering, University of Science and Technology Beijing;

【机构】 北京科技大学；

【摘要】 从铁液元素氧化的氧势图上可见,磷和铬氧化物的氧势线相距甚近,两者可同时氧化。对于不锈钢除尘灰的矿热炉还原熔炼过程,亦要求做到"去磷保铬"以降低铬镍铁合金产品中的P含量,并提高除尘灰的Cr回收率。由于磷和铬与碳都能出现选择性氧化,所以含铬炉料的氧化脱磷实质是三元素之间的选择性氧化问题。通过对矿热炉还原熔炼不锈钢除尘灰的热力学分析,找到了铁液中碳含量应控制在C-Cr和C-P选择性氧化的两个临界点,得到脱磷最佳碳含量范围为2.6~4.9%。更多还原

【Abstract】 It can be seen from the oxygen-potential diagram of oxidation of elements in the molten iron that the oxygen potential lines of phosphorus and chromium oxide are very close. So [Cr] and [P] can be oxidized simultaneously. During the reduction process of stainless steel dust by submerged arc furnace, it was also required to realize " dephosphorization and chromium conservation " to reduce the [P] content of inconel and improve the recovery rate of Cr from the dust. Since selective oxidation can occur between phosphorus and carbon as well as between chromium and carbon, so dephosphorization of charge containing chromium under oxidizing atmosphere in essence is selective oxidation among the three elements. By thermodynamic analysis, it was found that carbon content should be controlled between two junctions of C-Cr and C-P selective oxidation which were generally called critical point and the best carbon content range for dephosphorization was 2.6~4.9wt%.更多还原