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Journal Cover Journal of Mining World Express
  [3 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Print) 2169-642X - ISSN (Online) 2169-6438
   Published by Science and Eng Pub Co. Homepage  [48 journals]
  • Design of Open Pit Mine for Ajabanoko Iron Ore Deposit Using Csmine

    • Abstract: Design of Open Pit Mine for Ajabanoko Iron Ore Deposit Using Csmine
      Pages 20-28
      Author R.A AdebimpeJ.M Akand
      The design and planning of an open pit mine is about the economics of the mine and are governed by geological and engineering characteristics. A mine design software (CSMine) was used to design the final pit limits, tons per block and number of benches for Ajabanoko iron ore deposit using pit restrictions. These restrictions are; surface constraints, geometric pit limits, outer economic bounds and floating cone bounds. The block model for the pit design was created using three sets of parameters which includes; the key block coordinates, the block size and the number of blocks in the X, Y, and Z directions. The final pit limit obtained for the deposit is 113.25m.
      PubDate: 2017-0
       
  • Hydroacoustic Cavitation for Recovering Anthracite Fines from Waste Silt
           Slurry

    • Abstract: Hydroacoustic Cavitation for Recovering Anthracite Fines from Waste Silt Slurry
      Pages 10-19
      Author Shang LiuTom GeezaFred S. CannonMark S. KlimaJames C. FurnessJames Pagnott
      Hydroacoustic cavitation-ozone-hydrogen peroxide treatment (HAC-O3-H2O2) was tested for the beneficiation of anthracite fines from a silt-coal slurry that was discharged from a coal processing plant. The as-received silt-coal slurry hosted 63-57% ash. The treatment processes included HAC-O3-H2O2 dislodging of coal fines from silts, followed by cyclone separation, then spiral concentration. This process significantly enhanced the separation of anthracite fines from ash (silt and clays); and it produced a stream of high carbon content anthracite with no more than 8.5% ash—i.e. a beneficiated “clean coal”. The coupling of ozone and hydrogen peroxide with hydroacoustic cavitation (HAC) proved to have a positive effect beyond that achieved with just HAC. When mere HAC was followed by cyclone and spiral separation, 68.8% of all the coal that had been bound up in this silt-coal slurry could be reclaimed as clean-coal product (with < 8.5% ash). This represented material that would have otherwise been thrown away as silt-coal slurry to silt-pond impoundments in conventional operations. Yet further, when HAC was coupled with ozone and H2O2, 72.4 % of the coal could be recovered as clean coal with 8.5% ash. For these two HAC-inclusive trials, 22% of all as-received solids could be recovered as clean coal. When a Control trial excluded HAC, O3 and H2O2, only 14.3 % of the influent coal could be recovered (with < 8.5 % ash); and only 4.7% of all as-received solids were recoverable as clean-coal product. The favorable HAC effect was attributed to the intense hydroacoustics, cavitation, and advanced oxidants causing the coal fines to become aggressively dislodged from the silt fines; and thus they could centrifugally demarcate from the silts as these slurries passed through the cyclone and spiral.
      PubDate: 2017-0
       
  • Flotation of an Oxidized Copper Sulfide Ore

    • Abstract: Flotation of an Oxidized Copper Sulfide Ore
      Pages 1-9
      Author Ahmed A. SeifelnasrGhorashi Z. ZainAbdel-Zaher M. Abouzei
      This paper presents the results of the characterization and processing of the Hofrat En Nahas copper sulfide ore from Sudan (Southwest of Darfur). Mineralogical examinations indicated that chalcopyrite is the main valuable copper mineral present in this ore. The associated gangue minerals include pyrite, feldspar, quartz and calcite. Furthermore, the mineralogical investigation revealed that the chalcopyrite mineral surface has been subjected to oxidation and/or alteration. Microscopic examination and grain counting of the size fractions indicated that the degree of liberation of the copper minerals was obtained at about 150 µm. A sulfidization-flotation method was used, on a laboratory scale, to investigate the amenability of this ore to be concentrated. Promising results were obtained at pH 12, 16 g/Mg potassium amyl xanthate collector, 16 g/Mg sodium sulfide as sulfidizing agent, and 20% solids in the pulp using pine oil as a frother. From a flotation feed assaying 2.7% Cu, a copper concentrate assaying about 23.5% Cu at a recovery of 91.5% was obtained in only one roughing and one cleaning stages.
      PubDate: 2017-0
       
 
 
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