提高淮钢转炉终点温度命中率的工艺优化

doi:10.13228/j.boyuan.issn0449-749x.20170389

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Abstract To solve the problems of low BOF end-point temperature hit rate and high consumption of slag materials， the smelting process was optimized for a 100 t converter in Huaigang. The main measures include the selection of oxygen lance nozzle parameters， the determination of lance height in smelting process， addition time of slag material and mode optimization of bottom blowing process. The oxygen lance parameters were optimized according to actual working oxygen pressure. The low-high-low lance height model was used and total lance height increased 0.1 m compared with original process. The amount of slag materials was controlled， and the lime and light burned dolomite were 27 and 12 kg/t （steel）. The bottom blowing rate of converter increased from 0.02 to 0.1 m3/（t·min）. The industrial test results show that temperature hit rate of BOF end-point was improved by 39.87%， the dephosphorization rate was improved by 2.58%， the total slagging materials consumption was reduced by about 8.5 kg /t（steel） and the smelting time was shortened by 0.53 min. By means of petrographic analysis， the total free calcium oxide in the slag of the new process is controlled at about 5%， which is more stable than that of the old process.

Received: 28 July 2017 Published: 16 March 2018

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	YU Peng
	WU Wei

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YU Peng,WU Wei. Process optimization for improving hit rate of BOF end-point temperature in Huaigang Works[J]. Iron and Steel, 2018, 53(3): 96-103.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20170389 OR http://www.chinamet.cn/Jweb_gt/EN/Y2018/V53/I3/96

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