Abstract
Optimization of gold liberation is a function of hydrocyclone (cyclone) classi-fication efficiency with regard to a given target of 80% passing 75 μm at Josay Goldfields Limited. Key performance parameters that control the classification efficiency are hydrocyclone feed density, hydrocyclone feed pressure and throughput under fairly constant grinding process conditions. The hydrocyclone feed density related linearly to overflow product of percentage passing 75 μm and showed statistical linearity at even 1% critical level of significance. The paper provides a relation between cyclone feed density and cyclone overflow product size fraction as a function of cyclone efficiency. Gradient of the relation establishes the standard unit of performance which depicts the classification efficiency as percentage passing 75 μm per percentage solids of cyclone feed density. This measurement provides a timely corrective action of key performance control parameters. The selected seven days samples space used in the assessment was due to the effect of a daily production deficiency on the overall profit margin of Josay Goldfields as company.
Highlights
Efficiency is the relationship between the amount of input into a machine and the output or amount that it produces [1] [2]
Optimization of gold liberation is a function of hydrocyclone classification efficiency with regard to a given target of 80% passing 75 μm at Josay Goldfields Limited
The key performance control parameters for cyclone overflow product of the classification process are cyclone feed density, cyclone feed pressure and mill feed rate under fairly constant grinding process conditions. This places premium on the work of the Mineral Engineer to ascertain the fineness of the feed reporting as overflow and the parameters to be controlled in order to achieve the set target for optimum leaching process [5]
Summary
Efficiency is the relationship between the amount of input (energy) into a machine and the output or amount that it produces [1] [2]. Per design description from the [4], Josay Goldfields Limited leaching process requires overflow product of particle size fraction of 80% passing 75 μm for effective dissolution of gold This place is important on the efficiency of the classification unit which produces overflow product as feed for the dissolution of gold at the leaching unit. The key performance control parameters for cyclone overflow product of the classification process are cyclone feed density, cyclone feed pressure and mill feed rate (throughput) under fairly constant grinding process conditions This places premium on the work of the Mineral Engineer to ascertain the fineness (size fraction) of the feed reporting as overflow and the parameters to be controlled in order to achieve the set target for optimum leaching process [5]. This postmortem result prevents well-timed operational parameter control to gain the required size fraction for the leaching process which is fed with the overflow product from the classification unit process
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