摘要
为了研究水质硬度对煤泥颗粒润湿性及电动电位性质的影响,对煤泥颗粒在不同水介质中的润湿接触角及ζ-电位进行了测定分析,对煤泥在不同水介质中进行了浮选速度试验。研究表明:选煤厂循环水的硬度远高于生产补加清水的硬度,浮选用水的硬度对煤泥润湿接触角和ζ-电位具有显著影响;随着水的硬度增大,煤泥颗粒的润湿接触角逐渐减小、电动电位增加,浮选速率提高、选择性降低。
To investigate the influence of water- hardness on wetting properties and zeta- potential of coal slime, the contact angle,zeta-potential and flotation rate of fine coal particle were tested in different water. The results show that the hardness of cycling water samples is much higher than the replenished water of the same plant,and the water hardness have great influence on fine coal wetting contact angle and zeta- potential. In the same water,the coarse particles are more hydrophobic than fine particles,while the zeta-potential of coarse particle is lower. With the increasing of water hardness,the hydrophobicity of coal particles increases,while the zeta-potential of particle decreases,the flotation rate increases,while the selectivity reduces.
出处
《煤炭工程》
北大核心
2016年第9期137-141,共5页
Coal Engineering
关键词
煤泥浮选
水质硬度
润湿接触角
电动电位
coal flotation
water-hardness
wet contact angle
zeta-potential
