저널

Iron component in wasted hydrochloric etching solutions from steel works were recovered by electrolysis. The electric conductances of the solutions, as the function of the bath temperature and the ferrousion concen-tration, were measured and the result of the original solution was K=(0.0012+0.0005$ imes$10-3T-0.1160$ imes$10-6T2)$ imes$102S.m-1(T in $^{circ}C$) The current efficiency was better for the bath using a soluble steel plate anode than for the bath using an insoluble platinized titanium one. Densed electrolytic iron having the purity of higher than 99.99% was ob-tained at the electrolysis conditions of the cathodic current density of 15A/dm2, the bath temperature of $70pm$$5^{circ}C$ and the ferrous ion concentration of about 100g/l. The morphologies of the deposited iron were observed by SEM.