Features of choosing the schemes for selective mining of ores and justifying their rational parameters while using heap leaching schemes for processing

Gennady Sekisov,Aleksei Sobolev,Abdakim Ashimbaev,I Rasskazov,S Tkach

doi:10.1051/e3sconf/202019202010

Abstract

The article presents data from theoretical and experimental studies related to the search for a solution to an urgent geotechnological problem - selective mining of standard quality ore, substandard and diluted ores, taking into account the peculiarities of their processing by heap leaching. For complex-structural large-scale ore deposits of the stockwork morphological-structural type, multilevel heterogeneity is typical. The morphology and structure of the objects of direct extraction - ore bodies within the production blocks - vary significantly. The expediency of selective mining and separate heap leaching (or heap oxidation and leaching) of gold and copper from conditioned ores of various geological and technological types and grades is justified. In addition, it is advisable to selectively extract and separately process by heap leaching or flux in a controlled manner before it off-balance and diluted ores, as well as mineralized overburden and tailings of high-grade ores.

Highlights

A relatively technologically simple method of ore processing is becoming more widespread - heap leaching (HL), which makes it possible to involve off-balance and diluted ores into processing, as well as mineralized overburden rocks, which are inevitably extracted from the depths during open-pit mining
Despite a number of indisputable technological and economic advantages of heap leaching, its main disadvantage is the low recovery of valuable components, which limits its use in the processing of mineral raw materials with low contents of valuable components
Processing according to the heap leaching scheme, a methodological basis for the selection of technological type-grades of ores was developed, technological schemes for the formation of piles for HL were developed, the parameters and modes of heap oxidationleaching of valuable components from substandard oxidized porphyry gold-copper ores were substantiated

Summary

Introduction

A relatively technologically simple method of ore processing is becoming more widespread - heap leaching (HL), which makes it possible to involve off-balance and diluted ores into processing, as well as mineralized overburden rocks, which are inevitably extracted from the depths during open-pit mining. The first stage in increasing the efficiency of the HL, which can be implemented already at the present time, is the use of differentiated processing of ores and diluted ore mass, selectively extracted during mining, provision of differentiated preparation of the mineral mass, its stacking and effective filtration of working solutions through it.

Results

Conclusion