稳态导热下连铸保护渣固态渣膜有效导热系数的研究

doi:10.13228/j.boyuan.issn1005-4006.20180025

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摘要现有关于连铸保护渣导热系数的测量方法主要有瞬时热线法和激光脉冲法两种，而实际连铸生产过程中既有传导传热也有辐射传热，导热系数无法评价坯壳向结晶器的综合传热，需要用有效导热系数来计算通过渣膜的综合传热。通过热流模拟仪及激光共聚焦显微镜对固态渣膜的有效导热系数进行了研究。结果表明：随着碱度从1.1增加到1.4，连铸保护渣的结晶性能增强，固态渣膜表面粗糙度逐渐增大，拟合得到的有效导热系数从1.20 W/（m·K）增大到2.46W/（m·K）。

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	朱先飞
	文光华
	蒲大志
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	付达超

关键词 ：连铸, 保护渣, 热流模拟仪, 有效导热系数

Abstract：It has been reported that two methods could be used to measure the thermal conductivity of mold flux， including the instantaneous hot-wire method and the laser pulse method. However， during continuous casting process， the heat transfer between the shell and the mold involves conduction and radiation. Therefore， the thermal conductivity could not be used to evaluate the total heat flux in the mold. Thus， it is necessary to use the effective thermal conductivity to calculate the total heat flux through the slag film. In this paper， the effective thermal conductivity of the solid slag film was investigated through heat flux simulator and laser confocal microscope. The results show that， with the increase of the basicity from 1.1 to1.4， the crystallization capability of mold flux increases， which leads to the increase of the surface roughness of the solid slag film. Meanwhile， the effective thermal conductivity of the flux increases from 1.20W/（m·K） to 2.46W/（m·K）.

Key words： continuous casting mold flux heat flux simulator effective thermal conductivity

收稿日期: 2018-03-05 出版日期: 2018-06-29

引用本文:

朱先飞，文光华，蒲大志，唐萍，付达超. 稳态导热下连铸保护渣固态渣膜有效导热系数的研究[J]. , 2018, 37(03): 25-30. ZHU Xian-fei，WEN Guang-hua，PU Da-zhi，TANG Ping，FU Da-chao. Study on effective thermal conductivity of solid slag film for mold flux under steady state heat conduction. , 2018, 37(03): 25-30.

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