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首页> 外文期刊>CERAMICS INTERNATIONAL >Impact of spinel forming systems (Fe-/Mg-/Mn-Al-O) as functional coating materials for carbon -bonded alumina filters on steel melt filtration
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Impact of spinel forming systems (Fe-/Mg-/Mn-Al-O) as functional coating materials for carbon -bonded alumina filters on steel melt filtration

机译：尖晶石成型系统（Fe-/ Mg-/ Mn-Al-O）的影响是钢熔融过滤中碳含铝过滤器的功能涂料

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摘要

Since solid, non-metallic inclusions influence considerably the quality of casted steel products, carbon-bonded alumina foam filters are used in secondary metallurgical treatments to remove these particles from steel melts. In order to attain a significant improvement of the filtration process, five different carbonaceous spinel compounds from the Fe-/Mg-/Mn-Al-O systems are applied on carbon-bonded alumina filters in this study and investigated with regard of their filtration efficiency. However, these spinel compounds decompose partially during sintering at 1400 degrees C under reducing atmosphere, wherefore the resulting coatings contain not only spinel compounds, but also oxidic and metallic components. The subsequent interaction with molten steel leads to the development of multicrystal structures on the filter surface, which stem from interfacial reactions between coating materials, molten steel, and inclusions. As a result of this procedure, a reduction of almost 60% alumina inclusions is measured with the aid of an automatic SEM, whereby spinel compounds from the Fe-Mn-Al-O system achieve highest filtration efficiencies.
机译：由于固体，非金属夹杂物的影响力显着影响铸钢产品的质量，碳键合氧化铝泡沫过滤器用于二次冶金处理中，以从钢熔体中除去这些颗粒。为了实现过滤过程的显着改善，来自Fe-/ Mg-/ Mn-Al-O系统的五种不同的碳质尖晶石化合物在该研究中施加在碳键合氧化铝过滤器上，并研究了它们的过滤效率。然而，这些尖晶石化合物在减少气氛下在1400℃下部分地分解在烧结期间，因此所得涂层不仅含有尖晶石化合物，还含有氧化硅和金属组分。随后与钢水的相互作用导致过滤表面上的多晶结构的发展，其源于涂料，钢水和夹杂物之间的界面反应。由于该程序，借助于自动SEM测量近60％氧化铝夹杂物的降低，由此来自Fe-Mn-Al-O系统的尖晶石化合物实现最高的过滤效率。

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