基于铝土矿配碳球团还原熔分过程的渣相组成

doi:10.13228/j.boyuan.issn0449-749x.20140073

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Abstract The smelting slag reaction mechanism was studied by thermodynamic analysis and coal-based direct reduction and smelting experiment. The experiment result shows that the slag basicity has an important influence on iron nuggets size， metal yield and slag composition. When the basicity were 1.00， 2.00 and 3.85， the iron nuggets yield were 91.55%， 44.53% and 88.48% respectively， the iron nuggets size were 15.50， 7.00 and 8.54mm respectively， and the smelting slag composition (mass percent) were 55%A-34%CA6-6%C2AS-4%Fe， 64%A-35%C2AS-2%Fe and 24%C2S-62%C12A7-7%C2AS-4%C3AS3-3%Fe respectively. When the slag basicity was 3.85， the reduction smelting slag is mainly composed of C2S and C12A7， which mass percent is about 85%. Only when the mixture is close to the slag line of C2S-C12A7 ([R]=3.85)， the C2S and C12A7 will appear in the cooling crystallization equilibrium phase.

Received: 14 February 2014 Published: 02 February 2015

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TF55

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	ZHANG Ying-Yi
	ZI Yuan-Hong
	ZOU Zong-Shu

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ZHANG Ying-Yi,ZI Yuan-Hong,ZOU Zong-Shu. Slag composition mechanism based reduction and smelting of carbon composite bauxite pellets[J]. Iron and Steel, 2015, 50(2): 17-21.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20140073 OR http://www.chinamet.cn/Jweb_gt/EN/Y2015/V50/I2/17

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