碳酸钙/铜渣复合固硫剂热解性能分析研究  

Pyrolysis Analysis of Calcium Carbonate/Copper Residue Compound Desulfurization Agent

作　　者：颜小禹 李瑛[1] 张恒[1] 赖立践 陈捷[1] 李范范 

机构地区：[1]昆明理工大学冶金与能源工程学院,昆明650093

出　　处：《材料导报》2015年第6期93-97,共5页Materials Reports

基　　金：云南省应用基础研究面上项目(KKSA200804027)

摘　　要：首次分析研究铜渣作为添加剂,加入到碳酸钙中形成的碳酸钙/铜渣复合固硫剂的热解性能。通过XRD、DTA、BET、SEM分析可知,铜渣的加入能够改善碳酸钙/铜渣复合固硫剂的热解性能。热解分析表明:铜渣中的铁橄榄石(Fe2SiO4)、磁铁矿(Fe3O4)、白云石(CaMg(CO3)2)在高温下热解,产生对烟气脱硫有积极作用的Fe2O3、CaO、MgO、SiO2等物质。当铜渣加入量为10%(质量分数)时,碳酸钙/铜渣复合固硫剂的开始失重温度和失重时间比单独分析纯CaCO3的开始失重温度和失重时间分别降低85.9℃和提前13.3min,有利于脱硫反应的提前进行,延长了脱硫反应时间且降低了能耗;在煅烧温度为900℃时,碳酸钙/铜渣复合固硫剂比表面积达到最大值8.799m2/g,与单独分析纯CaCO3的比表面积5.00m2/g相比,其增幅达75.98%。The pyrolysis of compound desulfurization agent-calcium carbonate and copper residue was analyzed.Analyses of XRD,DTA,BET,SEM showed that copper residue can improve the desulfurization performance of the compound desulfurization agent.The results showed that the Fe2O3,CaO,MgO,SiO2 and other substances produced by fayalite（Fe2SiO4）,magnetite（Fe3O4）in copper residue had positive effect on desulfurization of flue gas.When the amount of copper residue added was 10%,the initial weight loss temperature of compound desulfurization agent decreased by 85.9 ℃ and the initial weight loss time of compound desulfurization agent shifted 13.3min forward compared with those time of pure CaCO3.When the decomposition temperature was 900 ℃,the specific surface area of compound desulfurization agent was 8.799m^2/g,achieving an increment of 75.98%compared with 5.00m^2/g of pure CaCO3.This is favorable condition for desulfurization.

关 键 词：碳酸钙 铜渣 复合固硫剂 热解 

分 类 号：X758[环境科学与工程—环境工程]