4.4 Article

High Temperature Softening and Melting Interactions Between Newman Blend Lump and Sinter

期刊

ISIJ INTERNATIONAL
卷 61, 期 12, 页码 2944-2952

出版社

IRON STEEL INST JAPAN KEIDANREN KAIKAN
DOI: 10.2355/isijinternational.ISIJINT-2021-198

关键词

sinter; lump; softening and melting; voidage; high-temperature interaction; blast furnace

资金

  1. Australian Research Council
  2. BHP

向作者/读者索取更多资源

This study investigated the S&M behavior and BF performance of NBLL, plant sinter, and sinter-NBLL mixture, finding significant improvements due to physical and chemical interactions. X-ray/Neutron CT scanning confirmed physical interaction, while Ca transfer analysis showed chemical interaction starting at around 1,200°C. The sinter-NBLL mixture exhibited more favorable BF performance compared to other burdens, forming a more permeable CZ with lower total pressure drop and higher gas utilization rate.
In this work, the softening and melting (S&M) behaviour and whole blast furnace (BF) performance of Newman Blend Lump (NBLL), plant sinter, and sinter-NBLL mixture were studied using S&M under load test and numerical BF modelling. Both physical and chemical interactions between sinter and lump were confirmed in the S&M process. Significant improvements were found in the S&M behaviour of the sinter-NBLL mixture because of the physical and chemical interaction. The physical interaction was examined using X-ray/Neutron Computed Tomography (CT) scanning on the samples from interrupted S&M under load tests. The void fraction in the ferrous layer of the sinter-NBLL mixture was found to be similar to the sinter and was higher than that for NBLL. The chemical interaction was investigated by analysing the Ca transfer from sinter to NBLL, which indicated that Ca transfer started around 1 200 C in the S&M process. FactSage was used to assist in the interpretation of the S&M test results. It was found that the NBLL sample starts to melt at a lower temperature compared to other burdens used in the present study, which also agreed well with the CT scan results. The whole BF performance of different ferrous burdens was studied using the experimental results as inputs. The sinter-NBLL mixture behaved more like the sinter than the NBLL; compared with the sinter only burden with the same total basicity, the sinter-NBLL combination formed a more permeable CZ, had a lower total BF pressure drop, and a higher gas utilization rate.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.4
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据