Effect of temperature on the vacuum carbothermal reduction of low-grade phosphate ore

被引：6
|
作者：
Wu, Qinghui [1 ,2 ]
Huang, Run [1 ,2 ]
Lv, Xiaodong [1 ,2 ]
Qian, Xing [1 ,2 ]
Liu, Li [1 ,2 ]
Zhang, Jinzhu [1 ,2 ]
机构：
[1] Guizhou Univ, Sch Mat & Met, Guiyang 550025, Guizhou, Peoples R China
[2] Guizhou Prov Key Lab Met Engn & Energy Proc Savin, Guiyang 550025, Guizhou, Peoples R China
来源：
MATERIALS RESEARCH EXPRESS | 2019年 / 6卷 / 07期
基金：
中国国家自然科学基金;
关键词：
FactSage; reduction temperature; vacuum carbothermal reduction; XRD; BENEFICIATION;
D O I：
10.1088/2053-1591/ab17a6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of temperature on the vacuum carbothermal reduction of low-grade phosphate ore was investigated by FactSage 7.0 and experimental studies. The calculation indicated that the mass of PO and PO2 in the gas phase increased with the increase of temperature, while the volatilization ratio of phosphorus initially increased and then decreased under fixed carbon dosage and pressure. The maximum theoretical volatilization ratio of phosphorus was 96.70% at 1250 degrees C. Experimental results showed that the volatilization ratio of phosphorus obviously increased as the reduction temperature was increased from 1200 degrees C to 1250 degrees C, and the tendency slowed down subsequently. Theoretical calculation and experimental results were in fairly good agreement that the optimum reduction temperature was between 1250 degrees C and 1300 degrees C. The Ca-5(PO4)(3)F and SiO2 in the ore were converted to Ca2SiO2F2, and the phosphorus in the ore was reduced to phosphorus vapor during the reduction.
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收藏
页数：7
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