par Berkol, I.;Derie, René ;Ghodsi, Mehdi
Référence ATB Metallurgie, 24, 1, page (3-9)
Publication Publié, 1984
Article révisé par les pairs
Résumé : Anthoinite (tungsten aluminate hydrate) is a minor constituent of the ferberite deposits of Central Africa. At the present time, the poor anthoinite concentrates (30% WO//3) produced by the ore treatment plants are hardly marketable. However, tungsten is easily extractible from these concentrates, by ammonia or ammonium carbonate solution leaching at 200 degree C. This extraction is highly selective, minerals of the gangue remaining quite unaltered. Tungsten trioxide has been prepared by conventional ways from the resulting ammonium tungstate solutions; its purity may exceed 99. 9%.