РЕАЛИЗАЦИЯ ТЕХНОЛОГИИ ОТВАЛЬНОГО ВЫЩЕЛАЧИВАНИЯ МЕДИ В ЗИМНИХ УСЛОВИЯХ

Abstract

The leaching of copper from the dumps of technogenic mineral formations of the Kounrad mine at a reduced temperature is presented. The experimental data are described and the implementation of the dump leaching technology is proposed using a different range of technical solutions that allow operating in conditions of negative temperatures and aimed at prolonging the dump leaching season in the cold season: heating of the leaching solution; covering the dump with a heat-insulating material (geocomposite); control and automatic temperature control on the surface of the dump blocks. As a result of pilot tests, it was found that raffinate can be safely fed to dumps at a lower temperature - about 12 ⁰C (instead of 18-20 ⁰C). It is shown that the temperature of the leaching solution (raffinate) can be changed depending on the outside air temperature using an automatic fuel consumption regulator, which is expedient and economical.