大型转炉煤气干法除尘技术研究与应用

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Abstract Basic oxygen furnace (BOF) gas dry dedusting technique is the key technology of contemporary BOF steelmaking to achieve high efficient energy conversion, which is provided with high efficient energy conversion, water saving, energy saving and lower emission, environment clean and friendly. It can significantly reduce water consumption, efficient recycling of steam and gas, to reduce environmental pollution. According to the process and technical feature of BOF steelmaking under the condition of “full three removal” at Shougang Jingtang, the technical mechanism of BOF gas explosion was analyzed, and the safe technical measures to control the BOF gas explosion were researched and developed. The gas flow process in evaporative cooling tower was investigated and analyzed by means of computational fluid dynamics (CFD) numerical simulation technology, and the layout and flow control of nozzles in evaporative cooling tower were optimized. A number of key technologies were researched and developed to control the gas composition and temperature rationally of 300t converter under the condition of “full three removal” smelting. The recovery efficiency of gas and steam was improved effectively; the gas explosions were reduced significantly. The targets are achieved which include stable operation, efficient energy recovery, and significantly reduced emissions. It is proved by application, the annual recovery of gas and steam under the condition of “full three removal” has been reached practically more than 85m3/t and 110kg/t respectively, and annual numbers of gas explosion are controlled less than 0.03%. BOF dry dedusting technology has ensured the safe and stable operation of steelmaking production; it has created significant economic and ecological environment benefit.

Key words： steelmaking BOF gas dry deduting evaporative cooler electrostatic precipitator energy recovery

Received: 11 June 2012 Published: 27 February 2013

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	ZHANG Fu-Meng

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ZHANG Fu-Meng. Research and Application on Large BOF Gas Dry Dedusting Technology[J]. Iron and Steel, 2013, 48(2): 1-9.

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http://www.chinamet.cn/Jweb_gt/EN/ OR http://www.chinamet.cn/Jweb_gt/EN/Y2013/V48/I2/1

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