浮选法脱除粉煤灰中未燃碳的研究  

Experimental study on removing unburned carbon from coal fly ash by flotation

作　　者：宋云霞[1,2] 魏昌杰[1,2] 

机构地区：[1]煤炭科学研究总院唐山研究院,河北唐山063012 [2]天地科技股份有限公司唐山分公司,河北唐山063012

出　　处：《选煤技术》2013年第3期13-16,共4页Coal Preparation Technology

摘　　要：为提高粉煤灰资源化利用水平和有效保护环境,对广东坪石发电厂粉煤灰的粒度特性和未燃碳的粒级分布进行分析,并采用接触角测量仪分析未燃碳粒的表面疏水性,基于此进行浮选脱碳试验。试验结果表明:该粉煤灰粒度极细,<0.074 mm粒级产率约为89.81%,未燃碳粒接触角仅为21°,可浮性差;当柴油用量为10 kg/t、仲辛醇用量为3.5 kg/t时,浮选尾煤产率为73.85%,烧失量为4.89%,浮选精煤产率为26.15%,灰分为45.45%,发热量为14.34 kJ/kg,综合回收率较高。In order to improve the utilization level of fly ash resources and effectively protect environment, analyzed the particle size characteristics of fly ash and size distribution of unburned carbon in Guangdong Pingshi power plant, also analyzed the surface hydrophobicity of unburned carbon particles by using the contact angle survey meter, and based on that conducted the decarburization test by flotation. The test results show that the particle size of fly ash is very fine, the content of 〈 O. 074 mm particle size is about 89.81% , the unburned carbon particle contact angle is only 21°, and the floatability is poor; when the dosage of diesel is 10 kg/t, sec-oetyl alcohol is 3.5 kg/t, the yield of flotation railings is 73.85% , and loss rate is 4.89% . the yield of flotation clean coal is 26.15% , ash content is 45.45% , heating value is 14.34 kJ/kg, so the comprehensive recovery rate is higher.

关 键 词：粉煤灰 浮选 可浮性 脱碳 资源化利用 

分 类 号：TD943[矿业工程—选矿]