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The Mine Call Factor - kriging

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.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...(PDF) Variable components of the Mine Call Factor from a surface mine ...Abstract 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 perfect and there is no mineral loss at any stage during handling and processing, then the MCF should theoretically be 100%.Variable components of the Mine Call Factor from a surface mine ...احصل على السعر

Monitoring ore loss and dilution for mine-to-mill integration in deep ...

SYNOPSIS The purpose of this study is to understand how ore loss and dilution affect the mine call factor, with the aim of subsequently improving the quality of ore mined and fed to the mill. It was necessary to know the relationship between ore mined and delivered for processing in order for the mine to operate efficiently.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 ...Mine Call Factor issues at Iduapriem Mine: Working towards a ... - COREGold mining efficiency is measured by the Mine Call Factor (MCF) a ratio, expressed as a percentage, of the gold 'accounted for' divided by the gold 'called for' by the mine's measuring methods. The 'unaccounted for' gold or theoretical gold loss and be separated into apparent gold loss and real gold loss (de Jager, 1997).Review of gold reef sampling and its impact on the mine call factorاحصل على السعر

An investigation of the mine call factor at Mazowe gold mine in Zimbabwe

The theory of Mine Call Factor expresses the total metal recovered and in residue, as a percentage of the metal indicated by the mine’s estimation method. From 2001 to 2016 the average MCF was 55%. Historically, the mine is characterized by a low MCF. It is estimated that over the past 50 years, unaccounted for gold amounts to 284,000 ounces.احصل على السعر