The thermal decomposition characteristics of sodium pyroxenite gangue in baiyunebo iron ore

被引：0
作者：
Luo, Guoping [1 ,2 ]
Wu, Shengli [1 ]
Nie, Xiaolong [2 ]
Wang, Yici [1 ,2 ]
Wang, Yuecong [2 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China
[2] Univ Sci & Technol Inner Mongolia, Sch Met & Mat, Baotou 014010, Peoples R China
来源：
ADVANCES IN MATERIALS AND MATERIALS PROCESSING IV, PTS 1 AND 2 | 2014年 / 887-888卷
基金：
中国国家自然科学基金;
关键词：
baiyunebo iron ore; sodium pyroxenite gangue; thermal decomposition; the changes of physical and chemical properties;
D O I：
10.4028/www.scientific.net/AMR.887-888.939
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The changes of physical and chemical properties of sodium pyroxenite gangue such as decomposition and phase transformation were researched by means of differential thermal analysis and X-ray diffraction. The results show that the natural sodium pyroxenite gangue contains the main mineral of aegirite(NaFe+3Si2O6), and it contains a number of BaSO4 and Na3Ca2(SO4)(3)F, etc. The water of crystallization decomposes at 554.7 degrees C. The Na3Ca2(SO4)(3)F decomposes into the composite sulfate and CaF2 over a wide range of temperatures. The main mineral of aegirite(NaFe+3Si2O6) reacts with CaF2 into NaF gas at 993.4 degrees C. The sodium pyroxenite gangue is melts and releases a small amount of SiF4 gas in the range of 1193.5-1300.7 degrees C.
引用
收藏
页码：939 / +
页数：3
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