Fundamental Research of Sintering Process on Improving the Tumbler Strength of Low SiO₂ Sinter

Abstract:

In the laboratory condition, a series of experiments were carried out in a sintering pot in order to improve the tumbler strength of low SiO₂ sinter. The results shows that the content of SiO₂ is decreased from 4.4wt% to 3.9wt% when the ratio of serpentine is decreased from 2.2wt% to 1.0wt%, as a result, the tumbler strength and the reduction degradation index of sinter all fall down. When the ratio of serpentine is further decreased, all kinds of sintering indexes fall down rapidly. If the basicity of sinter is increased from 1.75 to 1.85, and 5wt% iron concentrate is added in sintering mixture, the content of SiO₂ can be decreased to 3.9wt%~4.0wt%, meanwhile, the tumbler strength of sinter is the same as that of the reference sinter with 4.4wt% SiO₂. When Niuman iron ore, Hainan iron ore and Hamosili iron ore are used as the hearth layer instead of sinter, and the basicity of sinter is increased to 1.85, the tumbler strength of sinter with 3.9wt%~4.0wt%SiO₂ is the same as that of the reference sinter with 4.4wt% SiO₂.

• Periodical: Advanced Materials Research (Volumes 391-392)
• Pages: 844-848
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.391-392.844
• Online since: December 2011
• Authors: Zi Wei Ying, Man Sheng Chu, Jing Kun Yu, Li Xian Xu
• Keywords: Hearth Layer, Reduction Degradation Index, Sintering Pot, Tumbler Strength

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