Gungoren C, Ozdemir O, Wang X, Ozkan S G, Miller J D
Istanbul University-Cerrahpasa Engineering Faculty Mining Engineering Department, 34320, Avcilar, Istanbul, Turkey.
Department of Metallurgical Engineering, College of Mines and Earth Sciences, University of Utah, Salt Lake City, UT 84112, USA.
Ultrason Sonochem. 2019 Apr;52:446-454. doi: 10.1016/j.ultsonch.2018.12.023. Epub 2018 Dec 13.
In this study, the effect of ultrasound (US) on the quartz-amine flotation system was investigated in detail by considering various surface chemistry techniques. The effect of ultrasound on particle size, shape factor, and surface roughness were characterized by using Brunauer-Emmett-Teller (BET) surface area measurements and scanning electron microscopy (SEM) analyses. The contact angle and bubble-particle attachment time, as well as adsorption density measurements was carried out to evaluate the effect of ultrasound on quartz surface wetting ability. In addition, atomic force microscopy (AFM) analyses were conducted, and finally micro-flotation studies were performed. As a result, it was found that the micro-flotation recovery at 2 × 10 M dodecyl amine hydrochloride (DAH) concentration increased from 45.45% to 63.64% with 30 W ultrasonic application at conditioning step. However, the micro-flotation recovery decreased to 37.50% when the ultrasonic power increased to 150 W. The results showed some effect of ultrasound on particle size, particle shape, and surface roughness in some extent. The increase in the contact angle and the decrease in the bubble-particle attachment time were observed. A slightly high adsorption density was measured. All these show a positive effect of ultrasound on quartz flotation with amine as a collector.
在本研究中，通过考虑各种表面化学技术，详细研究了超声（US）对石英 - 胺浮选体系的影响。利用布鲁诺尔 - 埃米特 - 泰勒（BET）表面积测量和扫描电子显微镜（SEM）分析对超声对颗粒尺寸、形状因子和表面粗糙度的影响进行了表征。进行接触角、气泡 - 颗粒附着时间以及吸附密度测量，以评估超声对石英表面润湿性的影响。此外，还进行了原子力显微镜（AFM）分析，最后进行了微浮选研究。结果发现，在调节步骤施加30W超声时，2×10M十二烷基胺盐酸盐（DAH）浓度下的微浮选回收率从45.45%提高到了63.64%。然而，当超声功率增加到150W时，微浮选回收率降至37.50%。结果表明，超声在一定程度上对颗粒尺寸、颗粒形状和表面粗糙度有影响。观察到接触角增大，气泡 - 颗粒附着时间缩短。测量到吸附密度略高。所有这些都表明超声对以胺为捕收剂的石英浮选有积极影响。
