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首页> 外文期刊>La Metallurgia Italiana >Termodynamics and kinetics for the evolution of non-metallic inclusions in pipeline steel
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Termodynamics and kinetics for the evolution of non-metallic inclusions in pipeline steel

机译：管线钢中非金属夹杂物演化的热力学和动力学

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In the current study, the thermodynamics for the complex deoxidation of the pipeline steels was established and discussed, comparing to the deoxidation of pure iron. A remarkable difference in the deoxidation curve bretween real pipeline steel and pure iron was found since for real steels complex inclusions, such as calcium-aluminate, alumina and sulfide, were generated during deoxidation rather than pure alumina with the increasing of the dissolved aluminum in steel. A kinetic model was developed to predict the composition variation with time of non-metallic inclusions, steel and slag during LF refining of pipeline steels. Reactions between alloy elements and steel generating inclusions, slag and steel, between slag and lining refractory, between steel and lining refractory were considered in this kinetic model, considering air absorption and the removal of inclusions. The effects of inclusion size and gas flow rate during LF refining on the composition variation with time of inclusions, steel and slag were investigated. The kinetic model showed a good agreement with industrial measurement of the composition of inclusions, steel and slag.
机译：在当前的研究中，与纯铁的脱氧比较，建立并讨论了管道钢的复杂脱氧的热力学。发现真实管线钢与纯铁之间的脱氧曲线存在显着差异，因为对于真实钢，随着钢中固溶铝的增加，在脱氧过程中会生成复杂的夹杂物，例如铝酸钙，氧化铝和硫化物，而不是纯氧化铝。 。建立了动力学模型，以预测管线钢LF精炼过程中非金属夹杂物，钢和炉渣的成分随时间的变化。在该动力学模型中，考虑了空气吸收和杂质的去除，考虑了合金元素与生成钢的夹杂物，炉渣和钢之间，炉渣与衬里耐火材料之间，钢与衬里耐火材料之间的反应。研究了LF精炼过程中夹杂物尺寸和气体流量对夹杂物，钢和炉渣随时间的变化的影响。动力学模型与夹杂物，钢和炉渣成分的工业测量结果吻合良好。

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