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Title of Journal: Int J Miner Metall Mater

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Abbravation: International Journal of Minerals, Metallurgy, and Materials

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University of Science and Technology Beijing

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DOI

10.1007/s00108-005-1377-x

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ISSN

1869-103X

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Comparison of reduction disintegration characteris

Authors: Zhengwei Yu Guanghui Li Chen Liu Feng Zhou Zhiwei Peng Tao Jiang
Publish Date: 2016/04/01
Volume: 23, Issue: 4, Pages: 389-398
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Abstract

To reveal the impact of the composite agglomeration process CAP on the reduction disintegration properties of TiO2rich ironmaking burden for a blast furnace the reduction disintegration indices RDIs mineral constituents and microstructure of the products prepared by the CAP and the traditional sintering process TSP were investigated The results showed that compared to the sinter with a basicity of 20 prepared by the TSP the RDI+63 and the RDI+315 of the CAP product with the same basicity increased by 282wt and 137wt respectively whereas the RDI−05 decreased by 27wt The analysis of the mineral constituents and microstructure of the products indicated that the decreasing titanohematite content decreased the volume expansion during reduction Meanwhile the decreasing perovskite content decreased its detrimental effect on the reduction disintegration properties In addition the higher silicoferrite of calcium and aluminum SFCA content improved the strength of the CAP product Together these factors result in an improvement of the RDI of the CAP products In addition compared to the sinter the reduced CAP products clearly contained fewer cracks which also led to mitigation of reduction disintegration

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