Control on low melting point area in a CaO-SiO2-Al2O3-MnO system
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摘要: 通過熱力學計算軟件FactSage計算分析了CaO-SiO2-Al2O3-MnO四元系夾雜物低熔點區域的控制范圍.從控制夾雜物成分的角度,指出隨著Al2O3含量和CaO含量的增加,夾雜物低熔點區域大小都是先增大后減小;隨著SiO2含量和MnO含量的增加,夾雜物低熔點區域增大.為了得到低熔點夾雜物,應控制SiO2-Al2O3-CaO-MnO系中Al2O3質量分數為20%左右,CaO質量分數在25%~30%之間;同時控制CaO/SiO2比值為0.8~1,SiO2質量分數應為30%左右.
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關鍵詞:
- 煉鋼 /
- CaO-SiO2-Al2O3-MnO系 /
- 熱力學計算 /
- 夾雜物 /
- 成分控制
Abstract: The compositions of low melting point inclusions in a CaO-SiO2-Al2O3-MnO system were calculated and analyzed by thermodynamic software FactSage. The results show that the area of low melting point inclusions first increases then decreases with the alumina and calcium oxide contents accumulating. However, it always increases with the silica and manganese oxide contents rising. To obtain low melting point inclusions, the alumina and silica contents should be approximately controlled to 20% and 30%, respectively, the CaO content restricted to 25%-30%, and CaO/SiO2 should be 0.8-1.-
Key words:
- steelmaking /
- CaO-SiO2-Al2O3-MnO system /
- thermodynamic computation /
- inclusions /
- composition control
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