AP19676951 "Development of a resource-saving, combined technology for complex processing of multicomponent dust from non-ferrous metallurgy to produce marketable products"

Relevance

Arsenic-containing lead dusts formed during copper smelting are complex multicomponent man-made raw materials, the disposal of which is difficult due to the high content of toxic and difficult-to-recover components. The development of an effective hydrometallurgical technology with preliminary reduction firing and subsequent extraction of valuable metals (Pb, Cu, Re) ensures not only resource conservation, but also a reduction in environmental stress. The relevance of the project is due to the need for comprehensive waste recycling and maximum extraction of valuable components with minimal environmental impact.

Purpose

Investigation of the physico-chemical foundations of hydrometallurgical processes. Technological experiments on extraction of lead, copper and rhenium. The following tasks have been solved to achieve this goal: 1. The selection and scientific justification of a hydrometallurgical scheme for the extraction of lead, copper, and rhenium was carried out based on the construction of a general concept for dust processing technology 2. Laboratory experiments on cinder leaching were conducted, the characteristics of the products obtained were studied, and optimal process parameters were determined depending on acid consumption, temperature, and duration of the process 3. Laboratory experiments have been conducted to extract copper and rhenium from an acidic solution into commercial products: cementation isolation of copper and extraction of rhenium from solution, establishment of optimal process parameters. 4. The results were evaluated. A general hydrometallurgical scheme for the extraction of copper and rhenium from an acid solution has been constructed.

Expected and achieved results

1. A hydrometallurgical technological scheme has been developed for the complex extraction of Cu, Pb and Re from fine dust 2. New data on the composition of leaching products have been obtained. Optimal technological parameters of the process 3 have been established. New data on the distribution of metals between the products of the copper carburization process and rhenium extraction from an acid solution have been obtained. Optimal parameters of the process of cementation of copper and extraction of rhenium 4 have been established. New data on the compositions and forms of metals in the products of reducing roasting of dust with natural gas and cinder leaching with sulfuric acid have been obtained. Novelty: Optimal parameters of cinder leaching have been established: T=40 min, T:W=0.9, t=40 °C. High recovery of metals into solution was achieved: Cu–96.4%; Zn–99.5%. The Pb recovery in the lead cake was ~98%. The optimal parameters of copper cementation were determined: T =23 ° C, t–60 min., Fe – HC consumption according to the stoichiometry of the copper reduction reaction from sulfate. High Cu extraction of ~98% has been achieved. New data have been obtained on the extraction of rhenium using an extractant of the composition, % (wt.): 10 trialkylamine, 80 kerosene, 10di–2-ethylhexanol. Optimal parameters of the Re extraction process from solutions have been determined: A:B = 1:10, duration–5 min., temperature–25 °C. The maximum recovery of Re has been achieved–93%. With optimal technological parameters of the process, commercial ammonium perrenate was obtained with a content of 69.17% Re, which corresponds to the AR-0 brand, according to GOST 31411-2009.

Research team members with their identifiers (Scopus Author ID, Researcher ID, ORCID, if available) and links to relevant profiles

1. Досмухамедов Нурлан Калиевич

List of publications with links to them

1. Dosmukhamedov N. et al. Extraction of arsenic from fine dust of copper smelters by reduction roasting with natural gas //Sustainable Environment Research. – 2024. – Т. 34. – №. 1. – С. 20.
2. Dosmukhamedov N. et al. Behavior of As, Pb, Cu, and Zn under conditions of reduction roasting of fine dust generated by a copper smelter with natural gas //Metallurgist. – 2024. – Т. 68. – №. 4. – С. 605-614.
3. Dosmukhamedov N. K. et al. Technology for extraction of Pb, Cu, Zn from a feed based on lead cake from leached dust generated by reduction-oxidation blowing of melt //Kompleksnoe Ispolzovanie Mineralnogo Syra= Complex use of mineral resources. – 2025. – Т. 334. – №. 3. – С. 78-90.