Formation of cadmium chlorides via cadmium dissolution in chloride melts
摘要:
The kinetics and mechanism of the formation of complex Cd(I) ions via the reaction of metallic cadmium with Cd2+ ions in the Cd-0-CdCl2-ZnCl2-NH4Cl system are studied spectroscopically. The formation of Cd-2(2+) and Cd-2(3+) is evidenced by absorption bands around 270 and 335 nm, respectively, in the electronic spectrum of the melt. The anode current efficiency is determined for cadmium electrorefining in a chloride melt. A mechanism is proposed for the anodic dissolution of cadmium at different current densities and process temperatures.