Technology for the Extraction of Rare Earth Elements From Slag Kadamzhai Antimony Combine
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.