A method of determining the efficiency curves - i.e. partition number versus particle volumetric grade - for two-product separators is presented. Areal grade measurements are made on polished sections of the feed, the concentrate and the tailings of the separator and a kernel-based inversion technique is then used to obtain the volumetric grade distribution of the three assemblages of particles. The inversion is constrained by mass-balance equations. A plain kernel (by number of occurrences) and a weighted kernel (each occurrence counted with its area) are used for the solution. The weighted damped least-squares solution minimizes balance error and provides the partition curves of the separator. The method is tested on synthetic data from computer-generated areal grade measurements. Comparison of the derived volumetric distributions and partition curves with the original (simulated) liberation spectra of the feed and products of the separators allows the efficiency of the method as a means of evaluating the performance of a separator to be judged. It is concluded that the method offers a valid alternative to the tedious conventional procedure of conducting experiments with heavy liquids. © The Institution of Mining and Metallurgy 1999.

Determination of separator efficiency curve from areal measurements on polished sections

SCHENA, GIANNI;CHIARUTTINI, CLAUDIO
1999-01-01

Abstract

A method of determining the efficiency curves - i.e. partition number versus particle volumetric grade - for two-product separators is presented. Areal grade measurements are made on polished sections of the feed, the concentrate and the tailings of the separator and a kernel-based inversion technique is then used to obtain the volumetric grade distribution of the three assemblages of particles. The inversion is constrained by mass-balance equations. A plain kernel (by number of occurrences) and a weighted kernel (each occurrence counted with its area) are used for the solution. The weighted damped least-squares solution minimizes balance error and provides the partition curves of the separator. The method is tested on synthetic data from computer-generated areal grade measurements. Comparison of the derived volumetric distributions and partition curves with the original (simulated) liberation spectra of the feed and products of the separators allows the efficiency of the method as a means of evaluating the performance of a separator to be judged. It is concluded that the method offers a valid alternative to the tedious conventional procedure of conducting experiments with heavy liquids. © The Institution of Mining and Metallurgy 1999.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2770520
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