Investigation of Mechanochemical Leaching of Non-Ferrous Metals

Abstract

The research deals with metal extraction from off-grade ores and concentration tailings. There are provided results of simulating parameters of reagent leaching of metals in the disintegrator according to the metal recovery ratio. The research substantiates the method of waste-free processing of chemically recovered ores. Recovery of metals into solution is the same both under multiple leaching of tailings or ore in the disintegrator and agitation leaching of tailings or ore previously activated in the disintegrator with leaching solutions. The time of agitation leaching is more by two orders of magnitude than that of the disintegrator processing. Recovery of metals into solution is most affected by the content of sodium chloride in the solution. Then, in decreasing order, go the content of sulfuric acid in the solution, the disintegrator rotor rpm and L:S ratio.

Technological measures to enhance efficiency of mining ore from stopes applying self-propelled equipment

“…However, comparison of traditional mining technologies and those applying self-propelled equipment speaks in favor of the latter. The authors of [12,[17][18][19] state that with self-propelled equipment the average monthly meterage per syndicate is 160-170 m, a drifter's efficiency being 9 m. Yet, at Kryvbas, monthly crosscut driving does not officially exceed 70 m according to official designs. This is a very low rate even for traditional drifting methods.…”

Enhancement of the technology of mining steep ore bodies applying the “floating” crown

“…Underground mining operations have reached the depth of 1350 m. Ore bodies stretch for 800-1200 m, their horizontal thickness is 30-120 m and the angle of slope is 45-85 degrees [13][14][15][16]. The authors of [17][18][19][20] state that ore bodies significantly differ from each other in not only physical and mechanical properties that influence mining and processing technologies but also their quality. Mining of agglomerated iron ores is the main type of activities of enterprises that are engaged in underground mining of naturally rich iron ores.…”

Increasing efficiency of iron ore magnetic separation by using ultrasonic technologies

“…Application of ultrasonic technologies to nondestructive control is one of promising methods to enhance efficiency of iron ore concentration, this involving attainment of operative data on technological processes and treatment of ore particles by controlled high-energy ultrasound, in particular, by forming cavitation processes in iron ore slurry [11][12][13].…”