Influence of the roughness and shape of quartz particles on their flotation kinetics

• 作 者: Mehdi Rahimi Fahimeh Dehghani Bahram Rezai Mohammad Reza Aslani
• 机 构: Department of Mining and Metallurgical Engineering, Amirkabir University of Technology,Department of
• 出 处: International Journal of Minerals Metallurgy and Materials
• 发表日期: 2012年04期
• 关键词: flotation kinetics quartz shape parameters surface roughness

Surface roughness and shape play an important role on the behavior of particles in various processes such as flotation. In this re-search, the influence of different grinding methods on the surface roughness and shape characteristics of quartz particles as well as the effect of these parameters on the flotation of the particles was investigated. The surface roughness of the particles was determined by measuring their specific surface area via the gas adsorption method. The shape characteristics of the particles were measured and calculated by images obtained by scanning electron microscopy via an image analysis system. The flotation kinetics was determined using a laboratory flotation cell. The results showed that the particles of rod mill products have higher roughness and elongation ratio and lower roundness than the parti-cles of ball mill products. The flotation kinetics constant of the particles increased with their surface roughness increasing. Particles with higher elongation and lower roundness indicated higher floatability. In addition, the influence of the surface roughness on the flotation kinet-ics was greater than that of shape parameters.

Surface roughness and shape play an important role on the behavior of particles in various processes such as flotation. In this re-search, the influence of different grinding methods on the surface roughness and shape characteristics of quartz particles as well as the effect of these parameters on the flotation of the particles was investigated. The shape characteristics of the particles were measured and calculated by images obtained by scanning electron microscopy via an image analysis system. The flotation kinetics was determined using a laboratory flotation cell. The results showed that the particles of rod mill products have higher roughness and elongation ratio and lower roundness than the parti- cles of ball mill products. with their surface roughness increasing. Particles with higher elongation an d lower roundness indicates higher floatability. In addition, the influence of the surface roughness on the flotation kinet-ics was greater than that of shape parameters.