Ilmenite Smelted by Oxygen-Enriched Top-Blown Smelting Reduction

被引：9

作者：

Li H.-B. ^{[1
]}

Wang H. ^{[1
]}

Qi Y.-L. ^{[1
]}

Hu J.-H. ^{[1
]}

Li Y.-L. ^{[1
,2
]}

机构：

[1] Engineering Research Center of Metallurgical, Energy Conservation and Emission Reduction of Ministry of Education, Kunming University of Science and Technology, Kunming 650093, Yunnan

[2] Kunming Iron and Steel Co Ltd, Anning 650302, Yunnan

来源：

Journal of Iron and Steel Research International | 2011年 / 18卷 / 2期

关键词：

Desulfurization; Ilmenite; Iron recovery; Smelting reduction;

D O I：

10.1016/S1006-706X(11)60016-2

中图分类号：

学科分类号：

摘要：

Total ilmenite from Yunnan, China, difficult to smelt in blast furnace, was smelted by oxygen-enriched top-blown smelting reduction ironmaking technology. Much more details on smelting were discussed. Specifically, the influence of reduction temperature, slag basicity and molar ratio of carbon to oxygen on the reduction quality level including iron recovery and titanium and sulfur contents in the pig iron produced in the experiment was investigated. Iron recovery rate could reach 95% with titanium content below 0. 05% in pig iron produced, under the conditions of holding time of 30 min at 1 823 K, basicity of 1.1, carbon to oxygen molar ratio of 1. 0 and oxygen-enriched flow rate of 250 L/h. Oxidization potential of top-space of smelting reduction vessel and slag combination could create the driving force to partition phosphorous, titanium and silicon into the slag, which ensured low contents of the impurities involved above and carbon in pig iron. In addition, it avoided the generation of Ti(C, N) that could reduce interfacial tension of slag, which induced the formation of foaming slag seriously. Furthermore, jam of chargings and bubble flooding would be triggered, resulting in deterioration of BF state, increase of iron loss and decline of desulfurization rate. © 2011 Central Iron and Steel Research Institute.

引用

页码：7 / 13

页数：6

共 16 条

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