Effect of particle shape and roughness of talc mineral ground by different mills on the wettability and floatability

Date

2004-02-16

Author

Yekeler, M
Ulusoy, U
Hicyilmaz, C

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

130
views

0
downloads

In this study, shape characteristics of talc particles produced by ball, rod and autogenous mills were investigated using Scanning Electron Microscope (SEM) and expressed by the shape descriptors such as elongation, flatness, roundness and relative width by measuring on the particle projections in two dimensions (2D). Approximately, 139 particles were measured for image analysis from each mill product. Surface roughness values of talc mineral have been expressed by the parameters of R-a value on the pelleted surfaces of the particles by employing Surtronic 3(+) instrument. The wettability characteristics (gamma(c)) of talc mineral, produced by three different mills, were also determined by microflotation and the contact angle measurement techniques using the EMDEE MicroFLOT cell and Rame-Hart goniometer, respectively. Some correlations were established between the shape properties, surface roughness values and the wettability characteristics. The results have shown that elongation and smoothness helped to increase the hydrophobicity, while roundness and roughness caused a decrease in hydrophobicity or floatability for the talc mineral studied.

Subject Keywords

Floatability, Wettability, Surface roughness, Shape characteristics, Grinding, Talc

URI

https://hdl.handle.net/11511/66601

Journal

POWDER TECHNOLOGY

DOI

https://doi.org/10.1016/j.powtec.2003.12.012

Collections

Department of Mining Engineering, Article

Suggestions

OpenMETU
Core

Effects of the shape properties of talc and quartz particles on the wettability based separation processes Hicyilmaz, C; Ulusoy, U; Yekeler, M (2004-06-30) Shape properties of talc and quartz particles ground by a laboratory size ball, rod, and autogenous mills were studied using scanning electron microscope (SEM). More than 100 particles were measured to do the shape analysis of each mill product. The wettability behavior of (gamma(c)) a highly hydrophobic of talc mineral was determined by contact angle measurements and microflotation tests using a contact angle goniometer and EMDEE MicroFLOT test tube, respectively. On the other hand, wettability (gamma(c)) ...
Role of shape properties of calcite and barite particles on apparent hydrophobicity Ulusoy, U; Hicyilmaz, C; Yekeler, M (2004-08-01) Shape properties of calcite and barite particles ground by ball, rod and autogenous mills were examined by using scanning electron microscope (SEM). Shape properties have been stated in terms of shape descriptors such as elongation ratio, flatness, roundness and relative width by measuring about 200 particles. The results were correlated with the critical surface tension (gamma(c)) of wetting determined by contact angle and micro-flotation methods. The correlations set between the shape properties and the w...
Effect of boundary conditions and workpiece geometry on residual stresses and microstructure in quenching process Gür, Cemil Hakan; Schuler, W (1996-11-01) In this study, the internal and residual stress states in quenched C60 steel cylinders are analyzed both numerically and experimentally in order to investigate the effects of boundary conditions (such as quench severity and temperature of quench bath) and specimen geometry Specimen geometry has been analyzed by introducing a hole in a cylinder arid varying hole diameter and its' eccentricity. In the numerical analysis, the finite element method is applied and both temperature gradients and Phase transformat...
Effect of particle shape on fall velocity of angular particles Göğüş, Mustafa; Kokpinar, MA (2001-10-01) In this study, fall velocities of 174 regularly shaped angular particles-namely cylindrical, cubic, wedge-shaped prisms, and box-shaped prisms-made of five different materials were measured in calm water conditions in a cylindrical settling column. Reynolds numbers based on particle fall velocity and characteristic length were varied, in the range from 10(3) to 4.2 x 10(4). A new shape factor and characteristic length were defined from a transformed form of the original particle. Variation of experimentally...
Effects of Nanoparticle Geometry and Temperature on the Structural Evolution in FeCo Nanoalloys Yalçın, Mehtap; Mehrabov, Amdulla; Akdeniz, Mahmut Vedat (Institute of Physics, Polish Academy of Sciences, 2014-02-01) Effects of nanoparticle size (2.0-6.0 rim) and shape (spherical and cubic) on structural characteristic of atomic ordering processes and order-disorder transformation in B2-type ordered equiatomic-FeCo nanoalloys have been studied by combining electronic theory of alloys in the pseudopotential approximation with Ising-type Hamiltonian site exchange Monte Carlo simulation method. Structural evolutions in amorphous nanopaxticles (2-6 nm) of Fe50Co50 alloy have been utilized via molecular dynamic simulations f...

Citation Formats

M. Yekeler, U. Ulusoy, and C. Hicyilmaz, “Effect of particle shape and roughness of talc mineral ground by different mills on the wettability and floatability,” POWDER TECHNOLOGY, pp. 68–78, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/66601.