THERMODYNAMICS OF RARE-EARTHS IN STEELMAKING
THERMODYNAMICS OF RARE-EARTHS IN STEELMAKING
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DOI：
10.1007/bf02652708
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发表时间：
1976-01-01
期刊：
影响因子：
--
通讯作者：
KAY, DAR
中科院分区：
文献类型：
--
作者：
VAHED, A;KAY, DAR
本文计算了铈和镧的氧化物、硫化物和硫氧化物在炼钢条件下的标准生成自由能，并用来预测稀土在炼钢中的行为。用亨利活度表示的脱氧和脱硫常数，已被用来构造一个沉淀图，它表明稀土夹杂物形成的顺序。预测镧在（RE）-硫氧化物中富集，铈在（RE）-硫化物中富集。据预测，稀土应该能够将液态钢中的可溶性氧和硫含量降低到远低于目前大多数工业和实验室实践中发现的含量。本文提出了一种稀土完全控制夹杂物成分的炼钢添加量的简便计算方法。
The standard free energies of formation of the oxides, sulfides and oxysulfides of cerium and lanthanum under steelmaking conditions have been calculated and used to predict the behavior of rare earths in steelmaking. Deoxidation and desulfurization constants, expressed in terms of Henrian activities, have been used to construct a precipitation diagram which indicates the sequence of rare earth inclusion formation. An enrichment of lanthanum in (RE)-oxysulfide and cerium in (RE)-sulfide is predicted. It is also predicted that rare earths should be able to reduce the soluble oxygen and sulfur contents of liquid steel well below the contents presently found in most industrial and laboratory practices. A simple method of calculating steelmaking additions for complete rare earth control of inclusion composition is presented.