Preprint Article Version 1 This version is not peer-reviewed

Evaluation of the Geometallurgical Indexes for Comminution Properties at Sarcheshmeh Porphyry Copper Mine

Version 1 : Received: 7 December 2019 / Approved: 8 December 2019 / Online: 8 December 2019 (17:15:43 CET)

How to cite: Mohammadi, S.; Rezai, B.; Abdollahzadeh, A.; Mortazavi, S.M. Evaluation of the Geometallurgical Indexes for Comminution Properties at Sarcheshmeh Porphyry Copper Mine. Preprints 2019, 2019120103 (doi: 10.20944/preprints201912.0103.v1). Mohammadi, S.; Rezai, B.; Abdollahzadeh, A.; Mortazavi, S.M. Evaluation of the Geometallurgical Indexes for Comminution Properties at Sarcheshmeh Porphyry Copper Mine. Preprints 2019, 2019120103 (doi: 10.20944/preprints201912.0103.v1).

Abstract

Geometallurgy has become an important toll to predict the process behavior of the ores, and to decrease the production risks cause by variability of geological settings. In this paper geometallurgical index for grinding properties of the ore has investigated. In a comprehensive research at Sarcheshmeh porphyry copper mine, geological features, what were supposed to affect the main process responses including product’s grade-recovery, and plant’s throughput, were subjected to investigate as the possible geometallurgical indexes. The rock breakage variability, in terms of a ball mill grinding circuit and its effects on the plant throughput and energy consumption are presented. Ninety samples were collected based on geological features including lithology, hydrothermal alteration, and geological structures. The samples were characterized using XRD, XRF, and electron and optical microscopy. A simulated test method for Bond ball mill work index (BWI) was used to perform the comminution test. The results showed BWI values vary from 5.67 kWh/t to 20.21 kWh/t. Examination of the possible correlations between BWI and the geological features showed that the key geological feature related to comminution variability is lithology. In addition, the hydrothermal alteration would be an effective parameter in the period that the plant is fed with a single lithology

Subject Areas

geometallurgy; geometallurgical index; ore variability; bond work index; comminution; Sarcheshmeh

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