Journal of Siberian Federal University. Engineering & Technologies: Kinetics of Dissolution of Copper-Zinc Alloy in Nitric-Sulfuric Acid Solutions

Journal of Siberian Federal University. Engineering & Technologies / Kinetics of Dissolution of Copper-Zinc Alloy in Nitric-Sulfuric Acid Solutions

Issue: Journal of Siberian Federal University. Engineering & Technologies. 2019 12 (2)
Authors: Kravtsova, Elena D.
Contact information: Kravtsova, Elena D.: Siberian Federal University 79 Svobodny, Krasnoyarsk, 660041, Russia;
Keywords: copper; zinc; brass; recycling
Abstract: Studies were carried out on the dissolution of a copper-zinc alloy imitating a base substrate of an electron scrap containing noble metals in nitric-sulfuric acid solutions. A mathematical model is obtained that allows calculating the rate of copper and zinc transition to nitric-sulfuric solutions by varying the concentration of H+ ions from 1 to 4 g-ion / dm3 and NO3 – ions from 0,5 to 1,0 g-ion / dm3. In the range of concentrations of H+ and NO3 – ions studied, the maximum rate of copper transition into the solution is 6,5·10–5, and zinc is 4,5·10–5 kg / m2s. The equation of regression allowing to carry out a choice of conditions for proceeding with necessary speed of the chemical processes taking place in metallurgical practice is presented
Pages: 214-221
Paper at repository of SibFU: https://elib.sfu-kras.ru/handle/2311/110067