摘要
采用矿物组成改性技术活化煤矸石中Al2O3,消除阻止C2S晶相转变的干扰因素,实现了煤矸石活化烧结料100%的自粉化,自粉化料平均粒径小于1μm;用8%碳酸钠溶液可从自粉化料中以NaAlO2形式提取铝组分,用高效分散—碳化法制备超细Al(OH)3,其平均粒度小于200nm,为煤矸石的高价值利用开辟了一条新的途径。
Modification of mineral composition is adopted to activate alumina in coal gangue,eliminate interfering factors which prevent the crystal phase from transforming and realize the complete self-pulverization of coal gangue sinter,therefore the average diameter of the self-pulverized powders is less than l μm. Aluminium is extracted from the activated coal gangue as NaAlO_2 form by using 8% sodium carbonate solution and ultrafine aluminium hydroxide powders were obtained by addition of effective dispersants and using carbonization method,average diameter of the powders is less than 200nm.
出处
《矿产综合利用》
CAS
北大核心
2004年第3期34-37,26,共5页
Multipurpose Utilization of Mineral Resources
基金
四川省科学基金资助项目
关键词
煤矸石
晶相转变
自粉化料
氢氧化铝
Coal gangue
Crystal phase transformation
Self-pulverized feed
Aluminium hydroxide
