磷在多相脱磷转炉渣中的分布

doi:10.13228/j.boyuan.issn0449-749x.20190107

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Abstract The morphology and composition of three different dephosphorization converter slags were compared and the effect of basicity and TFe on the phosphorous distribution in slag different phases was discussed. For the slag with a high FeO content and low basicity, the slag existed as a liquid state in the oxygen blowing process, then the high FeO structure of which the P₂O₅ mass percent was about 6.5% and the CaO-SiO₂-(FeO) phase were formed under the air cooling condition. For the slag with a medium FeO content and low basicity, the slag existed as a liquid state during the high temperature and the precipitation phases were not much different under the sampling air cooling condition. When the basicity of the slag is moderate and the TFe content is suitable, the slag is in a solid-liquid coexisting zone at the high temperature, 2CaO·SiO₂-3CaO·P₂O₅ solid solution was formed and the mass percent of P₂O₅ in the solid solution was as high as 30%-40%. In the process of dephosphorization, the proportion of 2CaO·SiO₂ in the dephosphorization slag should be increased, and 2CaO·SiO₂-3CaO·P₂O₅ was formed to reduce the activity of P₂O₅ in the liquid phase slag, which made a contribution to the dephosphorization efficiency.

Key words： dephosphorization slag phosphorous condensed phase multi phase flux phosphorous distribution

Received: 19 March 2019

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	Articles by authors
	DONG Wen-liang
	PAN Hong-wei
	LUO Lei
	JI Chen-xi
	LI Hai-bo
	TIAN Zhi-hong

Cite this article:

DONG Wen-liang,PAN Hong-wei,LUO Lei等. Phosphorous distribution in dephosphorization slag[J]. Iron and Steel, 2020, 55(2): 75-81.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20190107 OR http://www.chinamet.cn/Jweb_gt/EN/Y2020/V55/I2/75

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