Review of Morphological Attributes with the New 3D Approach: Role of Roughness and Acuteness of Barite and Pyrite Particles on the Floatability
Surface roughness and acuteness are known as the two of the main properties of the particle morphology affecting the behavior of the powders in the process. Since the techniques used for the morphological characterization of powders by 2-dimensional microscopic measurement from the polished sections that have some disadvantages, the 3-dimensional analysis has often relied on measurements of particle morphology.A review of literature data was presented for high-grade barite and pyrite particles ground by ball and autogenous mills to determine the morphological properties using a new 3-D approach based on BET nitrogen gas adsorption and Permaran methods.Micromeritics Flowsorb Ⅱ 2300 instrument which employs BET nitrogen adsorption technique was used for the specific surface area measurements and the roughness of the particles. Permaran (manufactured by Outokumpu Oy) was used for the measurements of airflow resistance of powder samples for the acuteness. Spherical glass beads were used as reference sample for the acuteness measurements. The obtained parameters, which are surface roughness and acuteness, were correlated with the floatability performance of those mineral particles.The flotation performances of those particles ground in different mills (ball and autogenous)were also evaluated by a Hallimond tube.The results showed that lower roughness and acuteness values caused higher flotation recoveries for both barite and pyrite particles that were tested independently in different type of the mills. In other words; particles with smooth surfaces resulted in better floatability for barite and pyrite minerals studied.
Barite Pyrite Surface roughness Acuteness Grinding Floatability
U. Ulusoy C. Hicyilmaz M. Yekeler S. Bilgen G. Akdogan
Department of Mining Engineering, Cumhuriyet University, Turkey
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
300-309
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）