Abstract
The effect of C/A ratio (abbreviation of w (CaO)/ w (Al 2 O 3 )) on the crystallization characteristics was investigated. With an increase in C/A ratio from 1.1 to 1.8, the crystallization ability first decreased and then increased; the crystallization ability is weakest and strongest with C/A ratios of 1.5 and 1.8, respectively. Increasing C/A ratio, the crystalline phase changed from LiAlO 2 and CaO·Al 2 O 3 to LiAlO 2 and 3CaO·Al 2 O 3 . The Li + ions in the slag took precedence over Ca 2+ ions to participate in charge compensation because the mold flux contains Al3+ which is more advantageous for a monovalent cation, and LiAlO 2 formed preferentially over CaO·Al 2 O 3 . With a further increase in C/A ratio, 3CaO·Al 2 O 3 formed from the combination of Ca 2+ ions and Q Al 2 units, and the precipitated amount of 3CaO·Al 2 O 3 increased.
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