针对马钢CSP生产的SPHC钢钙处理现状,应用热力学平衡模型计算了钙处理钢液中的S-Ca、Al-Ca平衡反应,得出CaS容易在相对较高和温度较低时析出,1 873 K时变性处理形成C12A7和C3A的理论钙铝比值应分别满足w([Al])2/w([Ca])3≤2.90×105和9.62×103.参照实际生产数据,经分析提出该钢种钙处理时w([Al])2/w([Ca])3≤5.0×104、w([Ca])/w([Al])为0.09～0.11、w([S])≤0.003％等的合理控制范围.
Based on the calcium treatment for SPHC steel during the CSP production in Masteel,the equilibrium reactions for S-Ca and Al-Ca are calculated according to thermodynamic equilibrium model.It is concluded that the CaS iseasy to precipitate in a relatively higher sulfur content and a lower temperature.At 1 873 K,theoretical calcium alu-minum ratio to form liquid C12A7 and C3 A after modification should make the ratio of w([Al])2/w([Ca])3 no more than 2.90× 105 and 9.62 × 103,respectively.By reference to the actual production data,through the analysis it is proposed that the ratio of w([Al])2/w([Ca])3 should be no more than 5.0×104,the ration of w([Ca])/w([Al])should be in the range of 0.09-0.11 and the w([S]) should be equal to or less than 0.003％ during the calcium treatment.
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