微波预处理和硫酸铁氧化联合脱硫  

Study on desulfurization of coal by ferric sulfate oxidation in combination with microwave pretreatment

作　　者：罗道成[1,2] 汪威[1] 

机构地区：[1]湖南科技大学化学化工学院,湖南湘潭411201 [2]湖南科技大学煤炭资源清洁利用与矿山环境保护湖南省重点实验室,湖南湘潭411201

出　　处：《矿业工程研究》2013年第2期70-74,共5页Mineral Engineering Research

摘　　要：将微波技术和硫酸铁氧化用于煤炭脱硫,研究了煤样粒度、煤浆浓度、硫酸铁溶液浓度、反应温度、反应时间、微波功率、微波辐照时间等因素对脱硫效果的影响.结果表明,微波预处理和氧化铁氧化联合脱硫的优化工艺条件为:煤样粒度为0.075mm,煤浆浓度为10%(质量百分比),硫酸铁溶液浓度为1.0mol/L,反应温度为100℃,反应时间为8h,微波功率为800W,微波辐照时间为5min.在该优化工艺条件下,煤中全硫的脱除率为62.4%.研究表明,微波预处理和氧化铁氧化联合脱硫技术能有效地脱除煤中的硫分,降低煤中的灰分,提高煤的发热量,改善煤的质量.Microwave technology and ferric sulfate oxidation is used in desulfurization of coal. The impacts of some important factors, such as coal particle size, coal pulp concentration, ferric sulfate concentration, reaction temperature, reaction time, microwave power, microwave irradiation time on desulfurization are studied. Results show that the optimized technical conditions of ferric sulfate oxidation in combination with microwave pretreatment are as follows ： coal particle size is 0. 075 mm, coal pulp concentration is 10% （mass percentage ratio）, ferric sulfate concentration is 1.0 mol/L, reaction temperature is 100 ~C, reaction time is 8 h, microwave power is 800 W, and microwave irradiation time is 5 mins. The desulfurization rate of total sulfur is 62.4% under the optimized technical conditions. Results also show that the desulfurization technology of sulfate oxidation in combination with microwave pretreatment can remove effectively sulfur of the coal, reduce ash of the coal, enhance caloric value of the coal and improve quality of the coal.

关 键 词：煤 脱硫 硫酸铁 氧化 微波预处理 

分 类 号：TQ533[化学工程—煤化学工程]