工程科学学报2016，Vol.38Issue(2)：187-193,7.DOI:10.13374/j.issn2095-9389.2016.02.005
一水硬铝石矿-氢氧化钠体系微波焙烧相变规律
Phase transformation of the diasporic bauxite--sodium hydroxide system in microwave heating
摘要
Abstract
In this work, microwave energy was used for roasting treatment of diaspora bauxite mixed with saturated NaOH solution as an additive. The influences of microwave heating temperature and NaOH addition on the phase transformation of the diaspora ore-sodium hydroxide system were investigated. The phase constitution of the roasted ore in microwave heating and conventional heating processes was compared under the same experimental conditions. The phase composition and microstructure of the roasted ore were comparatively analyzed by X-ray diffraction analysis and scanning electron microscopy. The results show that microwave roasting can facilitate the rapid and complete reaction between NaOH and the diaspore ore, leading to more NaAlO2 phase forming at lower tempera-ture as compared to conventional heating. After microwave heating, the roasted ore is porous, good for subsequent digestion processes.关键词
铝土矿/氢氧化钠/微波加热/相变Key words
bauxite/sodium hydroxide/microwave heating/phase transformation分类
矿业与冶金引用本文复制引用
黎氏琼春,巨少华,彭金辉,王仕兴,周烈兴..一水硬铝石矿-氢氧化钠体系微波焙烧相变规律[J].工程科学学报,2016,38(2):187-193,7.基金项目
国家自然科学基金资助项目(51264022) （51264022）
云南省应用基础研究计划资助项目(KKSY201232038) （KKSY201232038）
