Microscopic mechanism of lining erosion in a blast furnace
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摘要: 對高爐上部中、低溫區和下部高溫區取磚樣,應用熱力學計算、掃描電鏡和能譜分析等方法,從熱力學和微觀機理兩方面研究了高爐襯磚侵蝕機理.結果表明:K對碳磚的侵蝕具有穿透力,Na則沒有;K是通過K蒸氣穿透到磚中,而Na是通過氣體帶著Na的化合物滲透到磚縫中.在高溫區Zn對磚的侵蝕作用很小,中、低溫區Zn對磚的侵蝕影響最大.Abstract: With samples acquired from different temperature zones in a blast furnace (BF),the erosion mechanism of linings was investigated in thermodynamics and micro-mechanism by thermodynamic calculations,SEM and EDS.The results indicate that bricks are penetrable for the steam of K,but Na penetrates in bricks by airflow mixed with Na compounds.Zn has a larger effect on lining erosion in middle and low temperature zones but much less in a high temperature zone.
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Key words:
- blast furnaces /
- linings /
- alkali metals /
- erosion /
- mechanism
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