摘要
盐水对浮选体系下颗粒与气泡行为的影响规律进行了综述。浮选矿浆中的无机盐电解质在提高精煤可燃体回收率的同时也增加了脉石矿物的回收。反电荷阳离子在煤粒表面吸附改善颗粒疏水性,颗粒-气泡间的液膜排液速度因双电层被压缩而加快;同时电解质兼有起泡剂的效果,能有效阻止气泡兼并聚合。另一方面,盐水浮选体系下细粒脉石颗粒的水流夹带和聚合截留现象严重,可燃体回收与脉石颗粒非选择性上浮之间的矛盾激增。
Presents a review of the effect of saline water on flotation behavior of bubble-particles.Saline water increases combustible recovery while also mineral matter recovery compared to fresh water.The absorption of cationic on the coal surface increased their surface hydrophobicity.The compression of the electrical double layer in saline water facilitated the drainage of the water film between the bubble and the particle.Meanwhile,Electrolytes have the function of frother's,which can effectively inhibit bubble coalescence.On the other hand,Saline water significantly increased the phenomenon of entrapment in aggregates and water entrainment of fine mineral particles.Contradiction between combustible recovery and ash recovery increased.
出处
《煤炭技术》
CAS
北大核心
2015年第5期306-308,共3页
Coal Technology
基金
国家自然科学基金委员会创新研究群体科学基金项目(50921002)
中央高校基本科研业务费专项资金资助项目(2014XT05)
关键词
煤泥
浮选
盐水
颗粒
气泡
slime
flotation
saline water
particle
bubble
