摘要
为了开发冶炼熔渣干法粒化和余热回收技术,提出了一种飞行高炉熔渣颗粒表面温度与发射率的瞬间测量方法。实验过程中,建立了熔渣表面温度与灰度、表面发射率与表面温度的关系曲线,通过高速摄像机瞬间捕捉飞行熔渣颗粒图像,计算图像灰度,结合关系曲线得到飞行熔渣颗粒表面温度和表面发射率。结果表明:随着熔渣表面温度的降低,表面发射率减小;当飞行熔渣颗粒表面温度为1402℃时,其表面发射率约为0.89。
An instantaneous measurement method was developed to measure the surface temperature and surface emissivity of blast furnace slag for investigating dry granulation and waste heat recovery from blast furnace slag.The system was used to measure temperature-gray scale and emissivity-temperature relationships from granular blast furnace slag images captured by a high-speed camera based on the surface gray scale level.The surface temperature and the surface emissivity of the granular blast furnace slag could then be obtained by combining the measured surface gray scale with these relationships for the granular blast furnace slag.The results show that the surface emissivity decreases with decreasing slag surface temperature.The slag surface emissivity is about 0.89 at 1402℃.
作者
张衍国
张颖
杨潇潇
ZHANG Yanguo;ZHANG Ying;YANG Xiaoxiao(Tsinghua University-University of Waterloo Joint Research Center for Micro/Nano Energy&Environment Technology,Key Laboratory for Thermal Science and Power Engineering of Ministry of Education,Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China;Beijing LiHua Science Technology Co.,Ltd.,Beijing 100085,China)
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第3期248-253,共6页
Journal of Tsinghua University(Science and Technology)
基金
国家重点研发计划(2017YFB0603601).
关键词
表面温度
高炉熔渣
干法粒化
余热回收
表面发射率
surface temperature
blast furnace slag
dry granulation
waste heat recovery
surface emissivity
