Geostatistical Studies for Grade Variability Estimation and Designing an Optimized Sampling System for the SeChahoon Beneficiation Line Feed of the Choghart Iron Ore Plant

Document Type : Research Article

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Abstract

Se-chahun beneficiation line is constructed for concentrating of low grade Se-chahun iron ore. The purpose of this article is designing an optimized sampling, studying of grade variability and blending system of the Se-chahun line feed. For this purpose, the optimum sampling weight is determined using 2-weight method that is equal to 0.49Kg and the number of sub-samples is calculated by means of corresponding error formulas that is equal to 29 samples. By means of variogram modeling, the optimum sampling period is calculated 110 hours. Grade variability can be reduced by fit bed blending. The blending is simulated by means of moving average method in different time period for reducing variability and grade fluctuation to increase plant recovery and concentrate quality. Finally, 65 hours for optimum blending is computed. Therefore, according to the rate of feed flow that is equal to 628t/h, optimum blending has been calculated as 40820ton. The control charts, confirm grade variability reduction into the specification grade limits. 

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History

  • Receive Date: 11 December 2011
  • Revise Date: 10 March 2012
  • Accept Date: 09 May 2012

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