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Reduction of Carbon-bearing Pellets of Oolitic Hematite in a Shaft Furnace

Journal of Iron and Steel Research International 2016年第3期23卷 210-219页

作者： Wei WU Jian-jun GAO Jia-qing ZENG Yuan-hong QI Jian-chang WANG Xi-dong ZHANG Metallurgical Technology Research Department Central Iron and Steel Research Institute State Key Laboratory for Advanced Iron and Steel Processes and Products Central Iron and Steel Research Institute WU Xi Zhao Shun Stainless Steel Middle Plate Co. Ltd.

When carbon-bearing pellets of oolitic hematite are treated in a shaft furnace,some problems are typically encountered：the metallization ratio of the metal pellets is low;the carbon-bearing pellets bond with each other at high temperatures;and the separation of phosphorus from iron is *** solve these problems,experiments were conducted on oolitic hematite reduction in a resistance furnace and semi-industrial test shaft *** results showed that the metallization rate reached 90% or greater under the conditions of a reduction temperature of 1 150℃,an atmosphere of simulated flue gas,and a reduction time between 1.5and *** problem of high-temperature bonding among pellets can be solved by increasing the strength of the pellets,coating their surface with a surface transfer agent and maintaining an even temperature inside the shaft *** basicity of the ore blend exerted no obvious effect on the magnetic concentrate and phosphorus *** phosphorus content in the magnetic concentrate can be further reduced by improving the grinding capacity of the ball mills used in the *** the basis of the experimental results related to oolitic hematite reduction with carbon-bearing pellets in a shaft furnace,the experimental requirements were satisfied with an average 88.27%total Fe content and 0.581% P content in the pellets.

关键词： oolitic hematite carbon-bearing pellet metallization rate high temperature bonding resistance furnace shaft furnace phosphorus separation

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