Effect of MgO content in sinter on the softening–melting behavior of mixed burden made from chromium-bearing vanadium–titanium magnetite |
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作者姓名: | Zheng-gen Liu Man-sheng Chu Hong-tao Wang Wei Zhao Xiang-xin Xue |
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作者单位: | School of Materials and Metallurgy, Northeastern University, Shenyang, 110819, China |
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基金项目: | The authors are especially thankful to the National Natu-ral Science Foundation of China,National High Technology Research and Development Program of China,Fun-damental Research Funds for the Central Universities of China |
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摘 要: | The effect of sinter with different MgO contents on the softening–melting behavior of mixed burden made from chromium- bearing vanadium–titanium magnetite was investigated. The results show that with increasing MgO content in the sinter, the softening interval and melting interval increased and the location of the cohesive zone shifted downward slightly and became moderately thicker. The softening–melting characteristic value was less pronounced when the MgO content in the sinter was 2.98wt%–3.40wt%. Increasing MgO content in the sinter reduced the content and recovery of V and Cr in the dripped iron. In addition, greater MgO contents in the sinter resulted in the generation of greater amounts of high-melting-point components, which adversely affected the permeability of the mixed burden. When the softening–melting behavior of the mixed burden and the recovery of valuable elements were taken into account, proper MgO contents in the sinter and slag ranged from 2.98wt% to 3.40wt% and from 11.46wt% to 12.72wt%, respectively, for the smelting of burden made from chromium-bearing vanadium–titanium magnetite in a blast furnace.
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关 键 词: | ironmaking magnetite magnesia softening melting behavior sinter blast furnace practice |
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