白云鄂博铁精矿造块过程中含钾脉石与萤石的相互作用
杨振刚1，张芳1,2，安胜利1,2，王艺慈1,2，马建平1
(1.内蒙古科技大学材料与冶金学院，内蒙古 包头 0140101；2.北京科技大学冶金与生态学院，北京 100083)
关键词：白云鄂博铁精矿；钾长石；萤石；氧化钙
中图分类号：TF521+.6 文献标识码：A
摘要：通过对钾长石体系、钾长石-萤石体系及钾长石-萤石-CaO体系在内的含钾长石体系的高温焙烧过程的实验研究，确定了钾长石与萤石不同温度下相互作用的产物。研究结果表明，钾长石在1090℃开始发生分解反应，生成白榴石(KAlSi2O6)和SiO2。钾长石中加入CaF2，900℃就已经发生钾长石的分解反应，1060℃开始有硅铝酸盐的生成；钾长石中加入CaF2和CaO，体系中有硅铝酸盐生成，并在1050℃开始生成枪晶石(3CaO·2SiO2·CaF2)，1270℃有镁黄长石(2CaO·MgO·2SiO2)和铝黄长石(2CaO·Al2O3·SiO2)；焙烧过程伴随有KF生成。
Interactionsof potassium gangue with fluorite in the process of Bayan Obo iron oreagglomeration gangue
YANG Zhengang2,ZHANG Fang1,2, AN Shengli1,2, WANG Yici1,2,MA Jianping2
（1.School of Metallurgicaland Ecological Engineering, University of Science and Technology Beijing,Beijing 100083, China; 2.Materials and Metallurgy School , Inner MongoliaUniversity of Science and Technology, Baotou 014010, China）
Key words:Bayan Oba iron ore ;potash feldspar; fluorite ; calcium oxide
Abstract: The high temperature roasting process of the potash feldsparsystem, the potash feldspar-fluorite system andthe potash feldspar-fluorite-CaO system werestudied, and the outcome of the interaction between potash feldspar andfluorite was evaluated. The results shows that the decomposition reaction ofpotash feldspar began at the temperature of 1 090 ℃. Differentchemical reactions occurred in the heating process, with the addition of CaF2and CaO. The decomposition reaction of potash feldspar alreadyhappened at the temperature of 900℃ and aluminosilicate was generated at thetemperature of 1060℃, with theaddition of CaF2. With the addition of CaF2 and CaO, notonly aluminosilicate(at thetemperature of 1050℃) but also cuspidine andmerwinite (at the temperature of 1270℃)wereobtained , with the gas of KF generated in the firing process.