This paper presents the results of comprehensive research and pilot-scale industrial tests aimed at the development and implementation of an effective technology for processing depleted chromium tailings from the Donskoy Mining and Processing Plant using KPFSH-50 jigging complexes. The accumulated chromite ore beneficiation tailings, amounting to approximately 3 million tons with a Cr₂O₃ content of 15–25%, are considered a significant source of secondary raw materials while simultaneously posing a serious environmental burden on surrounding areas. To improve chromium recovery efficiency, key technological parameters of the jigging process were optimized, including an increase in pulsation frequency to 2.0–2.5 s⁻¹, replacement of conventional screens with slotted screens having a slot width of 3 mm, and adjustment of process water consumption. Pilot-scale industrial tests were carried out at the Aktobe Ferroalloy Plant using tailings with a particle size fraction of 5–10 mm. As a result, chromium oxide recovery reached up to 73.1%, producing a concentrate with a Cr₂O₃ content of 35–51%, which meets the requirements for charge materials in ferroalloy smelting operations. To assess the reproducibility of the developed technology, validation tests were conducted at the Aksu Ferroalloy Plant, where a Cr₂O₃ recovery of 66.7% was achieved. The estimated economic effect from industrial implementation of the technology exceeds USD 21 million. The proposed approach enables the conversion of technogenic waste into strategic mineral raw materials and fully complies with the principles of resource efficiency and the circular economy.

TURGALIEV А.А.

Head of the slag processing workshop, Aktobe ferroalloy plant, Aktobe, Kazakhstan.

E-mail: amanturgaliev@gmail.com, https://orcid.org/0009-0005-7910-2900

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chromium tailings, jigging, mineral beneficiation, chromium recovery, secondary resources, technogenic waste, KPFSH-50