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Novel Method for Determining the Interfacial Properties of Melt Slags Based on Single Hot Thermocouple Technique

机译：单热热电偶技术的熔渣界面特性测定新方法

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摘要

To solve the problem of slow heating rate of traditional surface and interfacial tension test method of molten slag, a fast testing method of interface property is proposed in this paper, which bases on the single hot thermocouple technique (SHTT). The results are compared with those of the sessile drop method and literature. The results show that: 1) Using the capillary action of molten slag on the B-type thermocouple, the contact angle can be obtained quickly. The relative error between the contact angle of the slag and that of the sessile drop method is 0.10%, and the maximum fluctuation range of the repeated experiment is ±2.00°. 2) Substituting the contact angle and surface tension of the slag into Young's equation, the interfacial tension between the slag and the B-type thermocouple can be obtained. 3) For the commonly used CaO-SiO_2-Al_2O_3-MgO metallurgical slag system, without flux (CaF_2, Na_2O), the interfacial tension between slag and B-type thermocouple is less affected by the change of composition. The surface tension of the slag can be obtained by the SHTT method, and the relative error with the literature value is less than 2.94%.
机译：为了解决传统表面升温速度慢和熔渣界面张力测试方法的问题，提出了一种基于单热热电偶技术的界面性能快速测试方法。将结果与无滴法和文献进行比较。结果表明：1）利用熔渣在B型热电偶上的毛细作用，可以快速获得接触角。炉渣与无滴法的接触角之间的相对误差为0.10％，重复实验的最大波动范围为±2.00°。 2）将炉渣的接触角和表面张力代入杨氏方程，可以得到炉渣与B型热电偶之间的界面张力。 3）对于无助熔剂（CaF_2，Na_2O）的常用CaO-SiO_2-Al_2O_3-MgO冶金渣体系，渣和B型热电偶之间的界面张力受组成变化的影响较小。炉渣表面张力可以通过SHTT法求得，相对误差与文献值相差小于2.94％。

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