Role of surface roughness in the magnesite flotation and its mechanism

• 作者: Zhanglei Zhu Yafeng Fu Wanzhong Yin Haoran Sun Keqiang Chen Yuan Tang Bin Yang
• 来源期刊: 颗粒学报（英文版）
• 年，卷（期）: 2022,（3）
• 页码范围: 63-70
• 页数: 8页
• 语种: 英文

摘要

Surface roughness has a significant influence on mineral flotation.The assisting effect of surface roughness on minerals flotation is extensively investigated from its physical properties (e.g.,the existing form of asperity and its size),however,the associated effect on mineral flotation based on the differences in surface chemical property caused by surface roughness has been rarely touched.With such a question in mind,in this study,we investigated the flotation recoveries of two batches of magnesite particles with varying degree of surface roughness produced by two different mills,and associated the flotation performances to their surface chemical properties (amount of adsorption sites for the collector) via a series of detections,including Scanning Electron Microscope-Energy Dispersive Spectrometry (SEM-EDS)observations,X-ray photoelectron spectroscopy (XPS) analysis,adsorption capacity tests,and contact angle measurements.Finally,we concluded that rougher magnesite particles could provide more active sites (Mg2+) for a larger capacity of sodium oleate (NaOL),thereby improving the hydrophobicity and floatability.