Abstract
The article discusses methods for extracting rare earth elements from waste (slag) of the Kadamzhai Antimony Combine. For this, electrically activated water was used with the addition of 50% sulfuric acid in an amount of 3–10% in the ratio S:L 1:1 at a temperature of 40–80 ℃. The content of rare earth elements in the solution was determined photometrically in a medium with pH=2.2 by adding arsenazo (a reagent for concentration, separation and determination of more than 40 elements) at a wavelength of 680 nm with respect to the reference solution, as a result of which it was found that the total mass of rare earth elements was 96 mg/l.
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