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Journal of Mining World Express    [5 followers]  Follow    
  This is an Open Access Journal Open Access journal
     ISSN (Print) 2169-642X - ISSN (Online) 2169-6438
     Published by Science and Engineering Publishing Company Homepage  [46 journals]
  • Effect of Baffle Design Parameters on Fluid Dynamic Response of a Coal
           Classifier
    • Abstract: Effect of Baffle Design Parameters on Fluid Dynamic Response of a Coal Classifier
      Pages 15-23
      Author Hamid KhoshdastHami KhoshdastVahideh Shojae
      The effect of baffle design parameters including length, slope, shape, and installation position on fluid dynamic behavior of a coal classifier was simulated using computational fluid dynamic approach. General response of classifier at different conditions was interpreted by referring to turbulent patterns inside the sorting column and fluid velocity magnitude in products outlets. Results showed that the effect of design parameters is directly influenced by other operating factors such as feed pulp flowrate. The velocity of discharge streams can be used for the prediction of particle size variations of products due to any change in fluid dynamic pattern in classier.
      PubDate: 2014-01-20
       
  • Characterization and Beneficiation of the Egyptian Organic Shale for
           Possible Extraction of Organic Matter
    • Abstract: Characterization and Beneficiation of the Egyptian Organic Shale for Possible Extraction of Organic Matter
      Pages 1-8
      Author F. H. Abd El-RahiemM.S. HassanK.A. SelimN.A. Abdel-Khale
      The present paper focused on obtaining concentrate enriched with organic matter that could be suitable for a retorting process from black shale which is organic shale from the Safaga area on the Red Sea Coast. X-ray diffraction and optical polarising microscope were used in evaluating black shale minerals. Attrition scrubbing and flotation were conducted for enrichment of organic matter in the black shale sample. Mineralogical studies revealed that black shale samples contain bituminous calcareous clay stone, quartz, apatite and pyrite. Rabah mine organic shale contains about 28% organic matter. The results of the different separation techniques indicated that attritioning and flotation techniques successively enriched the organic matter in the organic shale .The organic matter could be enriched in the black shale and obtained a concentrate with ~ about 59% assaying and ~ 85% recovery.
      PubDate: 2014-01-20
       
  • On Fragmentation and Agglomeration Phenomena in an Ultrafine Dry Grinding
           Process of the Egyptian Calcium Carbonate: the Role of Oleic Acid Addition
           
    • Abstract: On Fragmentation and Agglomeration Phenomena in an Ultrafine Dry Grinding Process of the Egyptian Calcium Carbonate: the Role of Oleic Acid Addition
      Pages 9-14
      Author F. H. Abd El-RahiemK. A. Seli
      This study deals with ultrafine dry grinding of Egyptian calcium carbonate particles using a micronizer called “Planetary Mill”. As the size decreases during the process, the particles are strongly subjected to attractive interparticle forces leading to an aggregation phenomenon that generates a decrease in the surface area. In order to improve the process efficiency, the use of grinding aids, such as oleic acid, has been tested. The adsorption of the oleic acid on the particle surface is found to prevent the aggregation through an electrostatic effect that allows the surface area to be increased.
      PubDate: 2014-01-20
       
 
 
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