文献类型：期刊文献

中文题名：粉煤灰提铝协同制备硼酸探索

英文题名：Aluminum Extraction from Coal Fly Ash Accompanied with Boric Acid Preparation

作者：周华梅[1];乔秀臣[1]

机构：[1]华东理工大学资源与环境工程学院,上海200237

年份：2013

卷号：35

期号：8

起止页码：120

中文期刊名：武汉理工大学学报

外文期刊名：Journal of Wuhan University of Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD_E2013_2014】；

基金：上海市教育委员会科研创新项目(11CXY25);国家自然科学基金面上项目(21176082);博士点基金(20110074110002);教育部创新基金(ECUST)

语种：中文

中文关键词：粉煤灰;铝;硼砂;硫酸;硼酸

外文关键词：coal fly ash; aluminum; borax;sulfuric acid; boric acid

摘要：利用硼砂的助熔作用以及B对Si的取代特性,将硼砂与粉煤灰(CFA)混合并在高温下烧结,烧结熟料用硫酸溶液浸取,从而实现粉煤灰铝质组分提取。结果显示w(Na2B4O7)∶w(CFA)=0.5时,900℃烧结5minCFA中氧化铝浸出率超过95%,烧结1h,浸出率大于99%,继续升高烧结温度或延长烧结时间,则浸出率下降。借鉴现有硫酸法制硼酸工艺可以同时实现粉煤灰提铝与硼酸制备。
In order to extract aluminum from coal fly ash （CFA） borax was added due to its fluxing action and the sub- stitution of boron for Si. The mixture was sintered at high temperature and then leached using sulfuric acid solution. The results showed that more than 95% of aluminum in CFA was extracted from the mixture （w（Na2 B4 O7 ） ： w（CFA） =0. 5） sintered at 900 ℃ for 5 minutes and more than 99% of aluminum was from one hour-sintered mixture. The amount of aluminum extraction decreased when the sintering temperature was higher than 900 ℃ and the sintering time was longer than 1 h. The extraction of aluminum from CFA and the preparation of boric acid are possible to be achieved simultaneously based on present sulfuric acid-borate process.