摘要
研究了含碳红土矿在微波场中的加热还原焙烧,考察了不同含碳量情况下微波加热焙烧过程中的样品温度和产物的物相组成,以及浮氏体、磁铁矿和赤铁矿等不同价态的铁氧化物在微波场中的加热性能。结果表明,微波加热红土矿是一个热稳定过程,未出现热失控现象。红土矿的还原程度可通过调整加入碳粉的比例和微波加热时间来控制。还原焙烧过程中,碳粉加入量影响产物的物相组成,进而影响焙烧过程的温度。
The reductive roasting of carbon-containing laterite by heating in microwave field has been studied. The effect of carbon amount on the temperature rising and phase composition of laterite ores in roasting process by microwave heating were investigated. The heating behavior of iron oxides with different valence, such as wuestite, magnetite and hematite in microwave field were also studied. Result shows that the microwave heating of laterite ores is a self-stable process, without the phenomenon of heat runaway. The reduction degree of laterite can be controlled by adjusting the proportion of added carbon powder and the microwave heating time. The amount of carbon powder added during reduction roasting process can influence the phase composition of product, thus influencing the temperature of roasting process.
出处
《矿冶工程》
CAS
CSCD
北大核心
2008年第5期76-79,共4页
Mining and Metallurgical Engineering
基金
国家自然科学基金(50774020)
关键词
还原焙烧
微波加热
红土矿
镍
reductive roasting
microwave heating
laterite
nickle
