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| Process optimization of aluminum killed steel in Baogang Steel Mill |
| LIU Nan，XIN Guang-sheng，WANG Wen-yi |
| （Steel Mill， Steel Union Co.， Ltd. of Baotou Steel （Group） Corp， Baotou 014010， Nei Mongol， China） |
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Abstract Since the output and the variety of the aluminum killed steel increased in recent years， the production problem of the Al killed steel such as the clogging at the nozzle and the poor flow control due to the high Ca mass percent of the molten steel has attracted more and more attentions of researchers. In order to solve those problems， the problem in the production of the aluminum sedation steel in the No.5 casting machine of the BAO GANG Steel Mill was systematically analyzed. The deoxidization system combined the precipitation deoxidization （primary） and the diffusion deoxidization were used， and a new determination standard was adopted. Also， the refining slag system and the process and parameters of calcium treatment were optimized to control the composition of the molten steel and adjust the position and the angle of the feeding machine and so on， achieving the precision calcium treatment. The scheme was verified by the actual experiment. Compared with the scheme before optimization， a better economic benefit was obtained after the optimization， and the material consumption was saved in a great extent， which conforms to the current consumption of the steel industry and the green intelligentization of the state.
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Received: 22 March 2018
Published: 20 November 2018
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2018, Vol. 53 
