循环流化床灰中活性氧化铝的测定方法  

Determination of Active Alumina in Circulating Fluidized Bed Ash

作　　者：徐国辉 郭强 李果 上官芊 鲁佳易 韦连梅 Xu Guohui;Guo Qiang;Li Guo;Shangguan Qian;Lu Jiayi;Wei Lianmei(Dongfang Boiler Co.,Ltd.,Dongfang Electric Group,Sichuan,643001;East China University of Science and Technology,Shanghai,200237)

机构地区：[1]东方电气集团东方锅炉股份有限公司,四川643001 [2]华东理工大学,上海200237

出　　处：《当代化工研究》2024年第14期52-54,共3页Modern Chemical Research

基　　金：东方电气集团东方锅炉股份有限公司研发项目“贵州高硫煤CFB锅炉灰渣资源化利用方案研究”(项目编号:2023310031001004)。

摘　　要：准确检测循环流化床(CFB)灰中活性Al_(2)O_(3)含量,对于CFB灰的安全利用至关重要。但如何测定CFB灰中活性Al_(2)O_(3)含量并未形成标准方法。本文通过研究掺CFB灰的样品在各龄期养护条件下形成钙矾石(AFt)的规律发现,在钙、硫组分供应充足条件下,掺CFB灰的样品中,活性Al_(2)O_(3)反应生成的主要产物是AFt,通过测定AFt的最大生成量来检测CFB灰中活性Al_(2)O_(3)的含量是一种科学可信的方法。利用该方法所测CFB灰中活性Al_(2)O_(3)含量与文献中的盐酸快速检测法所测结果基本一致。但是盐酸快速检测法不适用于已经发生水化反应或陈化的CFB灰。The accurate determination of active alumina content in circulating fluidized bed(CFB)ash is important for its safe utilization.However,there is no standard method for the determination of active alumina in CFB ash.This research investigates the formation of Attringite(AFt)in CFB ash-bearing samples cured for different age.It was found that AFt was the major product after the reaction of active alumina in the CFB ash when the supply of calcium and sulphur was plentiful.The method for active alumina determination through the measurement of maximun AFt formed in CFB ash bearing sample was scientific and credible.The active alumina determined by this method was in concordance with that determined using diluted chloric acid rapid test method proposed in literature for raw CFB ash.However,this rapid test method is not applicable to the hydrated or aged CFB ash.

关 键 词：循环流化床 脱硫灰 氧化铝 钙矾石 水化 

分 类 号：TK229.66[动力工程及工程热物理—动力机械及工程]