Winning uranium from ore contg. arsenic, via sulphuric acid leach - where soln. obtd. is filtered, and arsenic in filtrate is pptd. as iron arsenate(BR 28.7.81)

摘要

The ore is leached with H2SO4 soln., and the solids removed, e.g. by filtration.Before the filtrate is used for winning uranium, an alkali is added to obtain pH 1.5- 3.5 in the presence of ferric ions providing a molar ratio(MR) of ferric ions/As above 1.0, so the As is pptd. as iron arsenate is pref. carried out at 40-80 deg.C.