Diffusion couples of 3CaO·Al₂O₃ and Fe–S–O–(Al) alloys are prepared to investigate the transformation of calcium aluminate reacting with solid sulfur-containing alloys. Diffusion behaviors and solid reaction between the alloy phase and the slag phase under 1373 K are studied. Product layers of 12CaO·7Al₂O₃ and CaS are formed at the interface. After heating for 10 h, the average thickness of CaS layer in samples with and without Al in the alloy phase is 2.10 and 0.71 μm, respectively, while it increases to 3.76 and 1.75 μm after 50 h heating. Aluminum in the alloy makes the solid reaction at the interface easier to happen, meanwhile inhibits the formation of CaS layer by promoting the formation of 12CaO·7Al₂O₃ layer and suppresses the diffusion of sulfur.

中文翻译：

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Al对3CaO·Al2O3氧化物与Fe-S-O-Al合金在1373 K固体反应的影响

制备 3CaO·Al ₂ O ₃和 Fe-S-O-(Al) 合金的扩散偶以研究铝酸钙与固体含硫合金反应的转变。研究了合金相与渣相在1373 K下的扩散行为和固相反应。界面处形成12CaO·7Al ₂ O ₃和CaS的产物层。加热10 h后，合金相中含Al和不含Al的样品中CaS层的平均厚度分别为2.10和0.71 μm，加热50 h后增加到3.76和1.75 μm。合金中的铝使界面处的固体反应更容易发生，同时通过促进12CaO·7Al ₂ O的形成来抑制CaS层的形成₃层并抑制硫的扩散。