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- Title
HIsmelt 工艺熔融还原炉用耐火材料的抗侵蚀性研究.
- Authors
车连房; 史成龙; 付卫; 蔡国庆; 张晓序
- Abstract
In order to promote the further development and application of the Hismelt process, based on the characteristics of smelting reduction vessels (SRV) of the Hismelt process, a static crucible method was used to compare the corrosion of iron slag from the SRV on chrome-corundum bricks, microporous corundum-mullite bricks, corundum-mullite bricks, and corundum-spinel bricks at 1 500 °C. The results indicate that: (1) the chrome-corundum brick has the strongest resistance to SRV slag, because FeO reacts with Al2O3 and Cr2O2 in the brick to form a high melting point substance, which inhibits the penetration and corrosion of the slag; (2) the formed magnesium-aluminate spinel and gehlenite in microporous corundum- mullite bricks form a protective film in the corrosion layer to prevent the penetration and corrosion of SRV slag; among the three chrome-free materials, the microporous corundum-mullite brick shows the best corrosion resistance; (3) the formation of large amounts of anorthite in the corundum-mullite brick generates gaps, thus corrosion becomes severe for the continuous slag penetration; (4) the spinel grains with small particle sizes and high activity are in-situ generated in the corundum spinel brick, which effectively absorb iron ions in the slag to form magnesium-aluminum-iron composite spinel, blocking the corrosion of SRV slag.
- Publication
Refractories / Naihuo Cailiao, 2023, Vol 57, Issue 6, p467
- ISSN
1001-1935
- Publication type
Article
- DOI
10.3969/j.issn.1001-1935.2023.06.002