Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403


공학

한국표면공학회지 (26권1호 23-30)

Recovery of Pure Electrolytic Iron from Wasted Hydrochloric Pickling Solution of Steel

철강의 염산산세 폐액으로부터 전해철의 제조에 관한 연구

김기호;권오익;홍성규;

충북대학교 공과대학 재료공학과;충북대학교 공과대학 재료공학과 대학원생;

Abstract

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.

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