Investigation of the relationship between sliding process measurement and induction time test of low rank coal particles in the surfactant solutions

ABSTRACT

The induction time or sliding time can be used to characterize the hydrophobicity of mineral particles. In order to investigate the relationship between sliding process and induction time, the Induction Timer and high-speed camera technology were adopted in this study. It was found that the flotation recoveries of low rank coal particles increased with the surfactant concentration increase. Howerer, the analysis results of induction time and slip angle velocity indicated that the flotation performances of low rank coal were depressed by anion SDS surfactant. Therefore, the slip angle velocity results can be adopted to support the induction time measurements.

KEYWORDS:

• Low rank coal
• flotation recovery
• induction time
• slip angle velocity
• surfactant
• XPS

Funding

This work was supported by the National Natural Science Foundation of China(Grant No. 51574235), China Scholarship Council (Grant No. 201606420004) and Key Supported Discipline of Guizhou Provence (Qian Xuewei HeZi ZDXK[2016]24).

Additional information

Funding

This work was supported by the National Natural Science Foundation of China(Grant No. 51574235), China Scholarship Council (Grant No. 201606420004) and Key Supported Discipline of Guizhou Provence (Qian Xuewei HeZi ZDXK[2016]24).