东北大学学报:自然科学版 ›› 2019, Vol. 40 ›› Issue (6): 875-880.DOI: 10.12068/j.issn.1005-3026.2019.06.021

• 资源与土木工程 • 上一篇    下一篇

氟磷灰石还原过程热力学分析

孙永升, 栗艳锋, 王定政, 韩跃新   

  1. (东北大学 资源与土木工程学院, 辽宁 沈阳110819)
  • 收稿日期:2018-05-25 修回日期:2018-05-25 出版日期:2019-06-15 发布日期:2019-06-14
  • 通讯作者: 孙永升
  • 作者简介:孙永升(1986-),男,山东济南人,东北大学副教授; 韩跃新(1961-),男,内蒙古赤峰人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51604063).

Thermodynamic Analysis of the Reduction Process of Fluorapatite

SUN Yong-sheng, LI Yan-feng, WANG Ding-zheng, HAN Yue-xin   

  1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China.
  • Received:2018-05-25 Revised:2018-05-25 Online:2019-06-15 Published:2019-06-14
  • Contact: LI Yan-feng
  • About author:-
  • Supported by:
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摘要: 采用FactSage 6.4热力学软件对不同体系下氟磷灰石的还原进行了热力学分析,探明了高磷鲕状赤铁矿中的某些组分对氟磷灰石还原的影响.计算结果表明,在无其他添加剂的条件下,氟磷灰石在1174℃ 时会发生脱氟反应生成Ca3(PO4)2和CaF2,在1439℃时被碳还原成CaF2,CaO和P2;CaO对氟磷灰石的还原没有直接影响,而SiO2,Al2O3和Fe能使氟磷灰石的起始还原温度由1439℃分别降低至1204,1247,1277℃,促进氟磷灰石的还原.热力学计算结果与文献中实验得出的结论相吻合,表明热力学模拟分析可作为氟磷灰石还原特性研究的指导手段.

关键词: 氟磷灰石, 还原, 添加剂, FactSage 6.4, 热力学分析

Abstract: A thermodynamic analysis on the reduction of fluorapatite in different systems was conducted by using the FactSage 6.4 thermochemical software. The effects of some components of high-phosphorus oolitic iron ore on the reduction of fluorapatite were studied. Results show that under non-additive condition, the defluorination of fluorapatite can be initiated at 1174℃ to produce Ca3(PO4)2 and CaF2; fluorapatite can be reduced to CaF2, CaO and P2 by carbon at 1439℃. CaO has no direct effect on the reduction of fluorapatite, while the minimum thermodynamic reduction temperatures of fluorapatite can be decreased by SiO2, Al2O3 and Fe from 1439℃ to 1204, 1247 and 1277℃ respectively, which can facilitate the reduction process of fluorapatite. The thermodynamic results obtained are in good agreement with the available experimental results in the literatures, which indicates that thermodynamic analysis can be used to study the reduction characteristics of phosphate ore.

Key words: fluorapatite, reduction, additives, FactSage 6.4, thermodynamic analysis

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