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The relationships between the kinetic grinding parameters with interstitial fillings and the liberation degree of a chromite ore

Umucu Yakup, Deniz Vedat, Gursoy Hakan Y., Tokcan Isıl, Arsoy Zeyni

Physicochemical Problems of Mineral Processing

2023

Vol. 59, iss. 5

art. no. 168254

In this study, the relationships between the liberation degree and the kinetic breakage parameters of a chromite ore obtained from the Burdur (Türkiye) were examined under the laboratory conditions. Firstly, liberation degrees for chromite particles were determined by the particle counting method in a metal microscope for 4 different size groups. Secondly, the breakage parameter of chromite ore which was dry ground with a ball mill was obtained using standard test methods. Additionally, the model parameters were also determined for the fractional interstitial fillings (U) of the chromite sample. Thirdly, the kinetic grinding parameters were compared with the liberation degree of the chromite sample. As a result of the tests, a very good correlation was obtained with R2=0.998, and regression analysis in the grinding processing of the chromite ore was used to verify the validity of the relationship parameter of Si that was produced. To these, it was found that interstitial fillings (U=0.6, 0.8, 1.0, and 1.2) have an effect on the grinding.

Effect of crushing type on the efficiency of flowing film separation

Sirkeci A. A., Gul A., Bulut G., Ozer M., Guven O., Perek K. T.

Physicochemical Problems of Mineral Processing

2018

Vol. 54, iss. 2

601--608

In recent years, the influence of different crushing systems (compression, impact, attrition) has been receiving more attention due to their significant role on particle liberation and shape of particles. The objective of this study was to investigate the effects of different crushing systems on both liberation degree and shape factors of chromite particles along with their enrichment conditions by shaking table. The tests were conducted on -1+0.5, -0.5+0.212 and -0.212 mm size fractions using the Wilfley type shaking table. The results of these tests showed that concentrates with higher metal contents were obtained by impact crushing of chromite in proportion to higher liberation degree and roundness of particles. Therefore, it was found that selective breakage can well be obtained by impact crushing in all fractions. The results of this study demonstrated the importance of crushing type on the liberation and enrichment processes.

Occurrence of barite mineralization in bahariya depression, western desert, Egypt

Haroun Y. S., Raslan M. F.

Physicochemical Problems of Mineral Processing

2010

Vol. 44

41-52

Odnotowano występowanie mineralizacji barytowej na południe od Gebel El Haufhuf na powierzchni ziemi Obniżenia El Bahariya (Pustynia Zachodnia, Egipt). Żyły barytowe wiją się w różnych kierunkach i są związane z załamaniami i uskokami ograniczonymi do najstarszych skał piaskowcowych formacji Sabaya. Niektóre żyły mają 7m długości i od 0.5 do 4m szerokości. Żyły te zawierają do 65% wagowych barytu oraz kwarc. Omówiono mieneralizację i uwolnienie ziarn.

Barite vein mineralization has been recorded South of Gebel El Haufhuf in the ground surface of El Bahariya depression, Western Desert of Egypt. The barite veins that trend in different directions are actually associated with major fold and fault structures that are retricted to the oldest sandstone rock of the Sabaya Formation. Some of these veins attain more than 7m length and a width ranging between 0.5 and up to 4m. The discovered barite veins are exclusively composed of barite and quartz with barite attaining 56% by weight. Besides the genetic aspects of the studied mineralization, the degree of liberation have been discussed.