摘要
高灰难选煤泥的有效分选是洁净煤技术领域的一个难题。采用高剪切调浆方法,分别测试浮选精煤与尾煤的接触角与Zeta电位,研究搅拌条件对煤泥颗粒表面性质的影响。结果表明,随着搅拌强度的提高,精煤与尾煤的Zeta电位和接触角的差值均呈增大趋势。在高剪切力的作用下,颗粒表面的性质发生了改变,煤颗粒表面的高灰泥质物覆盖层变薄或消失,疏水性增强。
The effective separation of high ash and difficult preparation coal slime is a difficult problem in the field of clean coal technology.With high shear pulp method adopted,the contact angle and Zeta potential of flotation fine coal and tailings were measured in order to analyze the influences of stirring factors on the surface properties of the coal slime particles.The results show that with the increasing of stirring intensity the defferences of Zeta and contact angle between fine coal and tailings increased. Under high shear intensity the surface properties of the particles changed,and the cover layer of high ash pelitic in the surface of coal particle became thinner or disappeared thus improving its hydrophobicity.
作者
许宁
陶秀祥
XU Ning;TAO Xiu-xiang(Tianjin Changlu Haijing Group Co.,Ltd.,Tianjin 300450,China;School of Chemical Science and Technology,China University of Mining and Technology,Xuzhou 221116,China)
出处
《煤炭技术》
CAS
2018年第12期325-327,共3页
Coal Technology
基金
国家自然科学基金项目(51274199)
教育部博士点基金(20130095110008)
关键词
高剪切搅拌
煤泥
表面性质
ZETA电位
接触角
high shear agitation
coal slime
surface property
Zeta potential
contact angle
