MgO及碱度对FeOx-SiO2-CaO-MgO-Al2O3体系液相生成的影响

doi:10.13228/j.boyuan.issn0449-749x.20190256

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Abstract In order to study the effects of MgO content and alkalinity on the liquid phase formation characteristics of pellets and sinters. The five-element system of FeO_x-SiO₂-CaO-MgO-Al₂O₃ is used as a research basis. By fixing the content of SiO₂ and Al₂O₃, and using the basicity and MgO content as variables, the method of FactSage simulation and melting point melting rate experimental data is used to analyze the influence of changes in MgO content and alkalinity on the liquid-phase formation characteristics of FeO_x-SiO₂-CaO-MgO-Al₂O₃ system. Based on this, determine the optimal MgO content and alkalinity range of this five-element system is determined, and theoretical support for enterprise production practice is provided. The results show that when the MgO content of the system ranges from 1.5% to 3.0 %, the amount of high-melting-point compounds in the system increases with the increase of the content of MgO, which suppresses the generation of the liquid phase. It gradually shrinks, when the alkalinity is 2.0 and 1.8, the melting rate of the system is relatively stable and easy to control.

Key words： FeO_x-SiO₂-CaO-MgO-Al₂O₃ multicomponent system FactSage simulation melting point melting rate experiment liquid phase formation characteristics

Received: 06 June 2019

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	Articles by authors
	HU Chang-qing
	WANG Xiao-lei
	SHI Xue-feng
	WANG Zhi-xing
	HAN Wei-gang

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HU Chang-qing,WANG Xiao-lei,SHI Xue-feng等. Effect of MgO and basicity on liquid phase formation of FeO_x-SiO₂-CaO-MgO-Al₂O₃ system[J]. Iron and Steel, 2020, 55(4): 27-33.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20190256 OR http://www.chinamet.cn/Jweb_gt/EN/Y2020/V55/I4/27

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