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Heat Transfer Analysis for industrial AC Electric Arc furnace

Journal of Iron and Steel Research International 2005年第4期12卷 9-16页

作者： ünal  amdali Murat Tun Development Bank of Turkey Ankara 06100 TurkeyYeditepe University Istanbul 81120 Turkey

The heat transfer analysis was performed for an AC electric arc furnace (EAF). Heat losses by conduction, convection and radiation from outer surface, roof, bottom and electrodes of EAF were determined in detail. Some... 详细信息

关键词： electric arc furnace (EAF) heat analysis industrial furnace

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Microstructure and properties of high emissivity coatings

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Journal of University of Science and Technology Beijing 2008年第5期15卷 627-632页

作者： Zhigang Dan Daqiang Cang Huimin Zhou Hao Bai Yanbin Zong Chinese Research Academy of Environmental Sciences Beijing 100012 China School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China Shangdong Huimin Technology Development Company Jinan 250100 China

A new coating on lining in industrial furnace for energy saving has been developed. Properties and microstructure of the coatings were revealed by emissivity instrument,X-ray diffraction （XRD）,transmission electron microscope （TEM） and scanning electron microscope （SEM）,respectively. The result indicates that the emissivity of coatings is higher than 0.90 and the thickness of coatings is about 200 μm. ZrO2,Cr2O3 and SiC in the coating benefit practical applications of coatings at high temperature with durable high emissivity and the continuous structure between the coatings and the substrate makes the coatings high cohesion and excellent adhesion for both specimens with and without sintering at high temperature. Result from laboratory experiment shows that the heating speed of specimen with coating is higher than that of controlled specimen and the temperature increases 30°C during the heating. The average temperature drop of specimen with coatings has a 13.5% improvement in the cooling speed. The application of coatings on the checker brick in a blast furnace of 1750m^3 indicates that the coating causes the blast temperature to an average increase of 28°C,reduces the fluctuation of blast temperature before the blowing-in and leads to a fuel saving of 10% approximately.

关键词： high emissivity coatings industrial furnace energy saving

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The Slab Heating furnace Temperature Presetting Model and Optimization 36

The Slab Heating Furnace Temperature Presetting Model and Op...

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第36届中国控制会议

作者： Zhengguang Xu Pengfei Xu School of Automation ＆ Electrical Engineering University of Science and Technology Beijing

ISBN: (纸本)9781538629185

In order to solve the problem that the mathematics model’s computation speed of the furnace is slow in operation and the temperature difference between the calculated temperature distribution and the real furnace temperature distribution is quite different,the presetting point model in the furnace control system is improved in this *** mathematics model of furnace temperature is consisted of mathematical model of billet heat transfer and presetting temperature of *** furnace temperature is optimized to save the energy consumption of the furnace by genetic algorithm.A new method for calculating the fitness function is *** constraint of the temperature difference between the preheating zone and the heating zone is added in the constraint *** simulation results show that the optimized furnace temperature can meet the requirements of slab rolling and the actual furnace temperature ***,the optimized furnace temperature is lower than the furnace temperature before optimization,which achieves the goal of energy conservation.

关键词： industrial furnace genetic algorithm energy saving the fitness function based on the order

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