AP23490117 "Development of a technology for complex processing of pyrite concentrates to produce iron oxide pigments and ultrafine metal powders"

Relevance

Economic relevance-to reduce the cost of nanopowders of non-ferrous metal oxides obtained from hydrochloric acid waste or decoction solutions by 20-25% and further restore hydrochloric acid by involving non-traditional man-made raw materials in the form of waste; to establish production and expand the range of competitive commercial products (thin oxides of iron, nickel, cobalt and zinc and ferrites based on them) from non-traditional man-made waste. Preliminary economic efficiency showed that the cost of ferrites (NiFe2O4, ZnFe2O4, CoFe2O4) is 2 times lower than the current price of similar powders, 60-80 US dollars against 100-350 US dollars for similar-composition nanopowders on the market.

Purpose

The aim of the project is to develop a comprehensive technology for processing pyrite concentrates to produce iron oxide pigments (Fe2O3, Fe3O4), metal oxide powders (Fe2O3, Fe3O4) and ferrites based on them (NiFe2O4, ZnFe2O4, CoFe2O4) by high-temperature hydrolysis with hydrochloric acid regeneration.

Expected and achieved results

The research developed novel methods for the complex processing of pyrite concentrates, including chlorination and subsequent reduction. Optimal conditions for chlorination and reduction were established, enabling the production of high-quality iron oxide pigments (Fe2O3, Fe3O4) and ultrafine metal powders (iron, nickel, cobalt) and ferrites based on them. A hydrochloric acid technology for processing cobalt-containing materials was developed and optimized. New data on the thermodynamics of processes and reaction mechanisms were obtained, particularly in the field of high-temperature hydrolysis. Methods for obtaining ferrite precursors and subsequent synthesis of compact ferrite materials with improved characteristics were developed.

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