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A Coupling Dynamic Model for Dissolution and Reduction of Chromium Ore in a Smelting Reduction Converter

LIU Yan , JIANG Mao-fa , XU Li-xian , WANG De-yong

钢铁研究学报(英文版)

For describing and resolving the process of chromium ore smelting reduction in a converter preferably, the coupling dynamic model was established based on the kinetic models of chromium ore dissolution and interfacial reducing reaction between the slag and metal. When 150 t stainless steel crude melts with chromium of 12% are produced in a smelting reduction converter with no initial chromium in metal at 1560 ℃, the results of the coupling dynamic model show that the mean reduction rate and injection rate of chromium ore are 0091 %·min-1 and 467 kg·min-1, respectively. The foundation of the coupling dynamic model provides a reference and basis on the constitution of rational processing route for a practical stainless steelmaking.

关键词: coupling dynamic model , smelting reduction , stainless steel crude melt , converter

富氧顶吹熔融还原冶炼高磷铁矿与钛铁矿配矿的试验研究

李慧斌，王华，郈亚丽，胡建杭，李幼灵

钢铁

采用模拟HIsmelt的富氧顶吹熔融还原技术冶炼惠民高磷铁矿与勐桥钛铁矿配矿，在温度为1500K，碱度为1.3, 配碳比为1.0的条件下，恒温时间20min（在升温过程中，没有通入惰性气体），恒温过程中通入O2（流量250L/h、纯度为99%）10min。恒温时间结束后，调整氧气流量为5L/h，保持其氧化性气氛至冷却。研究了不同配矿比例对铁回收率、生铁中磷、硫含量以及磷、硫分配比的影响。研究结果表明，在惠民铁矿和勐桥精矿的比例为1∶1时，其冶炼结果比较理想：铁的回收率为95.1%，生铁中磷的质量分数约为0.32%，硫的质量分数为0054%，钛的质量分数为0.031%。

关键词: HIsmelt , smelting reduction , high phosphorus iron ore , ilmenite

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