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Approximately 35 percent of the gold mined underground at Western Holdings Mine is unaccounted for on a monthly basis. Since 1986 the highest Mine Call Factor was 93 percent while the low^-t to date, 58 percent, occurred in April 1995
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NOTE: For powder factor other than 1 lb/cy: divide the resultant number of cubic yards obtained in Step #7 by the powder factor desired. 116 Formula for determination of resultant height of water when using cartridges to "dry up" the borehole. H = Resultant height of water in feet
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The theory of Mine Call Factor (MCF) compares the sum of metal produced in recovery plus residue to the metal called for by the mines evaluation method expressed as a percentage. This MCF concept is well known in underground scenarios and therefore this report highlights the MCF issues and the variable components affecting it from a surface ...
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The Mine Call Factor Isobel Clark A. Introduction In South African gold mines, the major measure of the efficiency of the production process is the "Mine Call Factor" (MCF). This factor compares the gold estimated in situ by the surveyors (or geologists) with the amount of gold finally produced by the plant - with allowance for losses to tailings.
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Mine Call Factor, is the ratio of the gold accounted for over the gold called for, expressed as a percentage. Real Gold Loss, is that portion of the total gold loss that can actually be found in the underground situation. xiv Sweepings, .is the final clean-up of ore on the reef horizon. It is
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1.1 Mine Call Factor and its significance The Institute of mine surveyors of South Africa, defines the MCF as the ratio, expressed as a percentage, which the specific product accounted for in recovery plus residue bears to the corresponding product called for by the mine…
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The theory of the Mine Call Factor (MCF) is well-known but not yet fully understood. The definition implies that if the process of sampling, assaying, tonnage measurements in a mine and plant are ...
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the opencast mine, loss rate and dilution rate shall be calculated respectively according to the stope face, and then steps and ore blocks. There are various calculation methods for loss rate and dilution rate according to different functions [4], and direct method and …
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MINE CALL FACTOR The ultimate gold mining efficiency measure is the Mine Call Factor. It is the ratio, expressed as a percentage, of the specific product accounted for in recovery plus residues versus the corresponding product called for by the mine's measuring methods. It should ideally equate to approximately 100 percent.
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A notable design parameter to be taken into account is the factor of dilution. Dilution is the waste material not separated from the ore in the stages of mining, and is sent to the processing plant. It is defined at the ratio of tonnage waste mined and sent for processing over the combined ore and waste tonnage milled.
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Mine Call Factor, is the ratio of the gold accounted for over the gold called for, expressed as a percentage. Real Gold Loss, is that portion of the total gold loss that can actually be found in the underground situation. xiv Sweepings, .is the final clean-up of ore on the reef horizon. It is
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Mine call factor means the ratio, expressed as a percentage, of the specific product recovered at the mill (plus residue) to the specific product contained in an ore body calculated based on an operation 's measuring and valuation methods; Sample 1. Sample 2. Based on 2 documents. 2.
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Conveyor Belt Calculating Chart. Aug 11, 2014· The theory of mine call factor (MCF) compares the sum of metal produced in recovery plus residue to the metal called for by the mines evaluation methods expressed as a percentage. The concept is well known in underground mining scenarios and therefore this article highlights some MCF issues from a ...
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The ratio, expressed as a percentage, of the total quantity of recovered and unrecovered mineral product after processing with the amount estimated in the ore based on sampling.
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