利用煤矸石制备超细氢氧化铝的试验研究  

Experimental Study on Preparation of Ultrafine Aluminum Hydroxide Powders from Coal Gangue

作　　者：王明玮[1] 杨静[1] 马鸿文[1] 苏双青[1] 郭锋[1] 

机构地区：[1]中国地质大学(北京)材料科学与工程学院,北京100083

出　　处：《中国粉体技术》2011年第5期49-51,共3页China Powder Science and Technology

基　　金："十一五"国家科技支撑计划项目;编号:2006BAD10B04;中国地质大学(北京)矿物材料开发应用国家专业实验室开放基金

摘　　要：为探索煤矸石的高附加值和清洁利用，以内蒙古某地的煤矸石为原料，采用改良的碱石灰烧结法处理煤矸石，使煤矸石中的SiO2组分转化为CaSiO3，然后将烧结熟料水溶后所得到的NaAlO2溶液，经脱硅除杂及降低苛性比处理，利用碳酸化分解法制备超细氢氧化铝粉体。结果表明：煤矸石经加碱烧结后，熟料的Al2O3溶出率为81％；碳酸化分解法制备超细氢氧化铝粉体为结晶度和分散性较好的拜耳石．颗粒尺寸大多在300-500nm之间。In order to research the new technique of high added value and clean use of coal ganguc, the coal ganguc from Inner Mongolia was used as raw materials, the improved soda lime sintcring process was employed to deal with coal gangue by turning SiO2 into CaSiO3. The purified NaAlO2 solution was obtained by dcsilication of the initial NaAlO2 solution from the dissolution of calcined clinkers. Then the ultrafinc aluminum hydroxide powders were prepared by carbonization method. The results showed that the dissolution rate of Al2O3 of calcinated coal ganguc was 81%. The prepared ultrafine aluminum hydroxide powders were bayerite with good crystallinity and dispersivity, and their particle size was mostly between 300-500nm.

关 键 词：煤矸石 烧结 碳酸化分解 超细氢氧化铝 

分 类 号：TF803.21[冶金工程—有色金属冶金]