摘要
在铝酸钙炉渣最佳物料配比条件下,应用XRD和激光粒度分析等手段研究了温度和保温时间对铝酸钙炉渣体系物相组成、粒度和氧化铝浸出性能的影响.结果表明,当温度低于1450℃时,炉渣处于固相反应区,反应速度缓慢,并含有相当一部分的难浸物质2CaO·Al2O3·SiO2,降低了炉渣的自粉率和浸出性能.当温度在1450℃以上时,炉渣中出现液相,反应速度加快且进行比较完全;炉渣主要物相为12CaO·7Al2O3和γ-2CaO·SiO2,自粉和浸出性能良好.保温时间对炉渣物相和粒度影响不大,但略微降低了氧化铝浸出率.
The phase composition, self-disintegrating property and alumina leaching property of calcium aluminate slag obtained at different temperatures and different holding times were investigated by XRD and laser particle size analyzer when the material ratio of calcium aluminate slag is at the optimum condition. The results indicate that when the temperature is below 1450℃, the reaction of slag takes place in solid reaction area and the reaction speed is slow, and there exists quite a lot of 2CaO·Al2O3·SiO2 which decreases the self-disintegrating and leaching property of calcium aluminate slag. When the temperature is above 1450℃, liquid appears in the slag, so the reactions become fast and proceed completely. The main phases of calcium aluminate slag are γ-2CaO·SiO2 and 12CaO·7Al2O3, and the properties of self-disintegrating and leaching are well. Holding time has little effect on the phase components and particle size of slag, but it decreases the leaching rate of alumina in the slag appreciably.
出处
《过程工程学报》
EI
CAS
CSCD
北大核心
2008年第5期949-952,共4页
The Chinese Journal of Process Engineering
基金
国家自然科学基金资助项目(编号:50674028)
中国铝业股份有限公司资助项目(编号:CHALCO-2007-KJ-03)
关键词
铝酸钙炉渣
氧化铝浸出
自粉
温度制度
calcium aluminate slag
alumina leaching
self-disintegrating
temperature system
