The article analyzes the information on modern developments in the utilization of phosphogypsum. Only a few directions give the prospect of large-scale use of both freshly formed phosphogypsum and phosphogypsum accumulated in dumps. Under the conditions of the Russian Federation, it is promising to use phosphogypsum for the production of building materials, as well as for agriculture, for reclamation of soil and the creation of mounds of a certain type. The possibility of using phosphogypsum as a raw material for obtaining rare-earth elements is shown.

Over the past decade, there has been a steady growth in demand for rare metals, with rhenium being one of the most highly demanded, but  also one of the most expensive and difficult to obtain. The  high demand for rhenium is  due to its use as a key component of metallurgical alloys or as a component of catalysts used in the oil refining industry. The aggregate of facts causes profitability of processing of the rhenium-containing mineral resources, which also are the copper substandard concentrates obtained at processing of the Zhezkazgan sandstones. The study focuses on the processes of extraction of copper and sorption recovery of rhenium from solutions of ammonia leaching of copper substandard concentrates.  Model solutions similar in the elemental composition to solutions of ammonia leaching solutions of copper substandard concentrates obtained during the processing of Zhezkazgan sandstones were used as an object of the study. The paper estimates extraction characteristics of copper recovery using LIX 84-I solution in kerosene, as well as sorption characteristics of the rhenium recovery process using the Purolite PPA100 anion exchanger. Based on the obtained characteristics the possibility of hydrometallurgical processing of ammonia leaching solutions of substandard copper-sulfide concentrates, and recovery of the obtained commercial products is shown.

The article considers one of the aspects of the processing of copper waste, containing in addition to a significant amount of copper several dispersed elements, one of the most interesting for extraction is rhenium. The dynamic and full dynamic sorption capacity of the sorbent AV-17-in case of perrhenate ions from ammonia solutions of leaching of copper smelting was determined.

The data on the distribution of orthophosphoric acid in the system di - (2-ethylhexyl) phosphoric acid (D2EHPA) – H3PO4 – H2O was obtained. The mutual losses of the extractant and the aqueous phase in the extraction of rare-earth elements occur from phosphoric acid using D2EHPA. The quantitative characteristics of redistribution between the aqueous and organic phases was determined. The composition of solvates in extracts was established at different equilibrium concentrations of orthophosphoric acid in the aqueous phase. The obtained data allow us to make changes in the technological process, which will allow us to obtain cleaner REEs after extraction and reduce the concentration of extractant in water effluents.

Получены значения констант скорости и времени полуобмена ионообменной адсорбции перренат-ионов из растворов аммиачного выщелачивания сорбентами АВ-17-8, Purolite A103Plus и Purolite PPA100. Определенные коэффициенты диффузии свидетельствуют о гелевом механизме диффузии в сорбентах АВ-17-8, Purolite A103Plus и Purolite PPA100 при сорбции перренат-ионов из аммиачных растворов. The values of the rate and time constants of the semi-exchange of ion exchange adsorption of perrenate ions from solutions of ammonia leaching with sorbents AV-17-8, Purolite A103Plus and Purolite PPA100 were obtained. Certain diffusion coefficients indicate a gel diffusion mechanism in the sorbents AV-17-8, Purolite A103Plus and Purolite PPA100 during the sorption of perrenate ions from ammonia solutions.