Effects of frothers on bubbles size and flotation performance of hydrophobic minerals  

起泡剂对气泡大小和疏水矿物浮选性能的影响

作　　者：Gülşah GÜVEN Berivan TUNÇ Ş.Beste AYDIN Gülay BULUT 

机构地区：[1]Mineral Processing Engineering Department,Faculty of Mines,Istanbul Technical University,Maslak 34469,Istanbul,Turkey [2]Research Center,Metso Outotec,Kuparitie 10,28101 Pori,Finland

出　　处：《Journal of Central South University》2024年第7期2280-2299,共20页中南大学学报（英文版）

基　　金：Project(ID42787)supported by the Istanbul Technical University,BAP(Scientific Research Project)Department,Turkey。

摘　　要：Frothers facilitate the reduction of bubbles size by preventing bubbles coalescence and produce more stable froths.The collision probability of the bubbles and particles substantially increases by decreasing bubble size.For the same volume system,fewer bubbles result from a distribution of large-sized bubbles,and more bubbles result from a distribution of small-sized bubbles.In this research,fundamental two-phase frother characterization parameters were aimed to link with three-phase coal and talc flotation behavior.For this purpose,the effect of single and dual frother systems on inhibiting bubble coalescence was investigated with methyl isobutyl carbinol(MIBC),isooctanol(2 ethyl hexanol),pine oil,and Dowfroth 250.Based on the results of single frothers,isooctanol at the lowest critical coalescence concentration(CCC)value of 6×10^(−6) achieved the smallest bubbles with Sauter mean diameter of 0.80 mm.By blending Dowfroth 250 and pine oil,the bubbles size decreased significantly,reaching 0.45 mm.While the highest recoveries in coal flotation were obtained in single and frother blends where the bubbles size was measured as the smallest in two-phase system,and such a relationship was not found for talc flotation.起泡剂通过防止气泡合并来抑制气泡长大,从而产生稳定的泡沫。气泡和粒子的碰撞概率随着气泡的减少而显著增大。在相同体积系统中,大气泡分布产生的气泡较少,小气泡分布产生的气泡较多。本研究旨在将两相体系的泡沫表征参数与三相体系的煤和滑石粉浮选行为相关联。为此,用甲基异丁基碳醇(MIBC)、异辛醇(2乙基己醇)、松油、Dowfroth 250泡沫剂研究单起泡剂体系和双起泡剂体系对气泡聚集的抑制作用。根据单起泡剂的结果,在最低临界聚集浓度为6×10^(−6)时,异辛醇的气泡最小,Sauter平均直径为0.80 mm。通过混合起泡剂Dowfroth 250和松油,气泡尺寸显著减小到0.45 mm。在煤浮选中,单起泡剂和多起泡剂共混物的回收率最高,在两相体系中气泡尺寸最小,但在滑石浮选中没有发现这种关系。

关 键 词：FLOTATION frother blends bubble size coal and talc flotation 

分 类 号：TD923.12[矿业工程—选矿]