测试分析了25家大型钢铁联合企业钢渣样品中 f －CaO的含量、显微形貌以及钢渣的稳定性，测试分析结果表明，热泼转炉渣的 f－CaO的质量分数大多在4％以上，而热闷渣、滚筒渣和风淬渣的 f －CaO含量相对较小；电炉渣的 f－CaO的质量分数都在1％以下；转炉钢渣中存在2类 f－CaO ，一类为死烧石灰，另一类由C3 S在高温冷却过程中分解形成。钢渣的稳定性与钢渣的 f －CaO有显著的正相关性，要将浸水膨胀率控制在2％以下，f－CaO的质量分数应当控制在3％以下，而要将压蒸粉化率控制在5．9％以下，f－CaO的质量分数应当控制在2％以下。%The content and micro morphology of f-CaO and volume stability of steel slag samples from 25 large integrated iron and steel companies are measured .The results show that the f-CaO content for most of hot splashing converter slagis above 4% ,while f-CaO content in hot stuffy slag ,BSSF slag and wind quenching slag is relatively lower and the f-CaO content for all the electrical furnaceslag samples is below 1% .In converter slag there exist two types of f-CaO ,one is dead-burned lime and the other is produced by C3 S decomposition during the cooling process .The significant positive correla-tion exists between the f-CaO content and volume stability .In order to make the immersion expansion ratio to be less than 2% ,the f-CaO content of slag should be controlled below 3% ,but to make the chalked ratio controlled below 5 .9% ,the f-CaO content of slag is advised to be less than 2% .
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