Published on 16 July 2020
The development of polymetallic deposits of North Ossetia-Alania by traditional technologies is considered unprofitable. The intensification and increasing complexity of mining operations contributed to an increase in ore dilution and an increase in the yield of tailings. A significant environmental threat due to the manifestation of metal-induced toxicity actualizes the problem of tailings disposal. Known methods for the extraction of metals from tailings differ in the kinetics of the disclosure of metal ores in apparatuses that implement the physical principles of disintegration. Enrichment processes are modernized using hydrometallurgical and chemical processing, including leaching technologies. A common drawback of the proposed technologies is the formation of secondary metal-containing tailings, which does not solve the problem of waste-free utilization of ore mining and processing products.
The prospects for the involvement of tailings technogenic re-serves are associated with the conversion of mining to reagent leaching technologies in activators, for example, a disintegrator. In multivariate studies, 22% of lead and 76% of zinc in the tailings were recovered from the tailings of the slag dressing of the Sadon ores for one processing cycle in a disintegrator, and by repeated processing the contents were brought to the level of sanitary requirements. Geotechnological methods for producing metals in the region mastered earlier than others.
So, in 1974, at the Kakadur deposit of the Fiagdon group, the first in the world, an attempt was made to apply the technology of leaching the balance reserves of the entire deposit. To extract metals from the lost ores of the Sadon deposits, underground leaching of areas of lost ores with the circulation of solutions through wells from the surface is proposed. An increase in the production capacity of enterprises through the involvement of substandard resources provides profit when rich ores are processed traditionally, and poor and miserable ores are leached. In this case, the through recovery factor may exceed the value of extraction by conventional technology.
All the metals contained in the tailings are extracted into the solution, which, with the improvement of technologies for extracting metals from the solution, will ensure the profitability of the mining industry in the region. The technology has been stocked with tailings for several decades. The reality of metal extraction by leaching the lost ore reserves from tailings of enrichment and metallurgy is proved by many-year full-factor studies. The involvement of substandard metal-containing raw materials in operation provides a comprehensive effect, the main components of which are the improvement of the region, the receipt of valuable marketable products and the solution of social problems.
Tags: выщелачивание, металлы, хвосты обогащения, горное предприятие, некондиционные запасы, дезинтегратор.
ISSN 1998-4502 (Print) ISSN 2499-975Х (Online)