摘要
为提高压块活性炭的强度,采制大同侏罗纪烟煤煤样,经破碎、粉磨制成煤粉,在煤焦油沥青存在下将煤粉制成压块成型料后炭化至600℃制成炭化料,测定压块成型料和炭化料样品的耐压强度和磨损强度,并研究煤粉粒度、水分、沥青添加量和成型压力对压块成型料和炭化料强度的影响规律。结果表明,压块成型料和炭化料的耐压强度呈现一致的变化规律,炭化过程中料块出现微裂隙导致炭化料的耐压强度低于成型料;水分对耐压强度的影响规律不明显;减小煤粉粒度、增加沥青含量和提高成型压力对耐压强度的提升有促进作用;成型压力和水分对磨损强度影响规律性并不明显,减小煤粉粒度和增加沥青含量可提升炭化料的磨损强度。在煤粉74μm(200目)通过率为96.5%、水分和沥青添加量(质量分数)均为10%、成型压力120 MPa时,以大同侏罗纪烟煤为原料可制备出高强度的压块活性炭产品。
In order to improve mechanical strength of briquetted activated carbon, Datong Jurassic bituminous coal was sampled, crushed and pulverized, and the pulverized coal were briquetted in the presence of coal tar pitch, then briquettes were carbonized at the temperature of 600 ℃. The briquette and carbonized briquette samples were determined compressive strength and wearability. Meanwhile, the effect law of particle size distribution of pulverized coal, water content, amount of coal tar pitch and briquetting pressure on mechanical strength were investigated. The results showed that the variation tendency of compressive strength for briquettes whether or not carbonized was similar. The compressive strength of carbonized briquette was less than that of briquette as cracks occur during carbonization process. There was not a regular effect of water content on compressive strength, whereas the finer the size of coal powder and the more the coal tar pitch content and the greater the briquetting pressure enhanced, the higher the compressive strength. Apart from this, no obvious influence of water con- tent and briquetting pressure on wearability could be observed, whereas the smaller the size of coal powder and the greater the coal tar pitch content, the higher the wearability of carbonized briquettes.In the end, the briquette prepared from pulverized coal powder, 96.5% of which could pass the sieve of 74 p^m mesh,in the mass fraction of 10% water and 10% coal tar pitch at briquetting pressure of 120 MPa,the opti- mal strength of briquetted activated carbon could obtained with Datong Jurassic bituminous coal.
出处
《煤炭科学技术》
CAS
北大核心
2016年第11期178-183,共6页
Coal Science and Technology
基金
中央高校基本科研业务费专项基金资助项目(2009KH10)
关键词
煤基活性炭
压块活性炭
煤焦油沥青
煤粉粒度
coal based activated carbon
briquetted activated carbon
coal tar pitch
particle size of coal powder
