摘要
物理洗选早已得到广泛应用，而化学净煤尚在研究开发中。本文采用不同煤阶的煤，用６％ＮａＯＨ水溶液在１００～３００℃温度下处理１ｈ，所得碱处理煤样再用５％稀盐酸加热煮沸３Ｏｍｉｎ，最后经过滤、洗涤和真空烘干得化学净煤，最低Ａ＿ｄ为０．１９％，净煤收率＞９０％。考察了温度、碱种类、碱浓度和时间等因素的影响，研究了脱矿物质机理。此外，还研究了碱处理的脱硫作用。
As is Well known,physical beneficiation of coal has been widespread applied while chemical one is under the way. In this paper ,various ranks of coals were treated by 6%NaOH aqueous at l00～300 ℃ for 1 hour. The resulted coal was heated and boiled with 5%hydrochloric acid for 30 minutes. After filtrat-ing,washing and drying , the clean coal was gained. Its lowest ash content was 0.19%and its recovery yield was greater than 90%. The effects of alkali type,alkali concentration , reaction temperature and reaction time on demineralization were in-vestigated. Also the mechanism of demineralization was studied. In addition,the desulfurization of alkali treating was discussed.
出处
《煤炭转化》
CAS
CSCD
北大核心
1994年第3期58-64,共7页
Coal Conversion
基金
煤转化国家重点实验室资助
关键词
稀碱处理法
脱灰
脱硫
煤
化学净煤
dilute alkali treating,chemical ash removal,desulfurization,coal
