Investigation of the technology for extracting vanadium semi-products from Sijjak ore fields

The paper provides an in-depth analysis of the possibilities for extracting vanadium metal from the ores of the Sijjak deposit, the composition of minerals, and their enrichment technologies. During the research, the physicochemical properties of the ores were studied. It was determined that the main elements in their composition are vanadium, iron, aluminum, silicon, and other compounds. The initial raw material composition was determined using X-ray phase analysis, SEM, SEM-EDX, and atomic emission spectroscopy methods. The composition and purity of the purified vanadium pentoxide obtained through enrichment, selective leaching, and processing were investigated using the aforementioned methods. To extract vanadium in its oxide form, a calcination technology with the addition of sodium carbonate at a temperature of 700°C and a method for producing sodium vanadate compounds have been developed. The experiments made it possible to increase the degree of vanadium transfer to the total solution up to 92.8%. Based on the research results, a combined pyrometallurgical and hydrometallurgical technological scheme for extracting vanadium from the Sijjak deposit ores was proposed, and optimal parameters were developed. A material balance of the created technological scheme has been developed, and a chain of recommended technological equipment for industrial application has been proposed.