脱磷保碳的理论与试验研究

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基金项目:

河北省自然科学基金(E2015209207)

河北省自然科学基金(E2017209223)国家自然科学基金资助项目(No.51574106)。

Theoretical and Experimental Study on Dephosphorization and Carbon Conservation

1. Anhui Province Key Laboratory of High-performance Rail Transportation New Materials and Safety Control, Ma'anshan 243000, Anhui, China;
2. School of Metallurgy and Resource, Anhui University of Technology, Ma'anshan 243002, Anhui, China

摘要: 基于分子—离子共存理论建立了CaO-MgO-FeO-SiO₂-P₂O₅五元渣系作用浓度计算模型,在此基础上分析了炉渣组元对脱碳、脱磷反应吉布斯自由能变化的影响规律,证明了脱磷保碳的可行性,并通过高温试验发现:在初始碳含量为0.5%、磷含量为0.032 5%的情况下,当熔渣碱度控制在5左右、FeO含量控制在10%²0%时,脱磷率可达75%以上,留碳率在50%⁷0%。
- 炼钢 /
- 脱磷 /
- 保碳 /
- 分子—离子共存理论 /
- 吉布斯自由能
Abstract: Based on the ion and molecule coexistence theory,the calculating model of action concentration for CaO-MgO-FeO-SiO₂-P₂O₅ slag was established. Based on this,the influence of slag compositions on the Gibbs free energy of decarburization and dephosphorization was analyzed,the feasibility of dephosphorization and protection carbon was proved.On the basis of thermodynamic analysis,the high temperature thermal experiment was conducted and the result showed that when the slag basicity is about 5 and the（FeO） content is between 10% and 20% with the condition that initial carbon content is 0.5% and the phosphorus content is 0.032 5%,the dephosphorization rate is up to 75%,the carbon conservation rate is between 50% and 70%.
- steelmaking /
- dephosphorization /
- carbon conservation /
- ion and molecule coexistence theory /
- Gibbs free energy