Nickel recovery from the alloy Al2Ni and the mixtures Al-Ni, Al2O3-Ni and Al2O3-NiO

FABIOLA JULIETA ALVAREZ; ANA ESTER BOHÉ

Cancún-México

Simposio; REWAS’08 GLOBAL SYMPOSIUM ON RECYCLING WASTE TREATMENT AND CLEAN TECHNOLOGY; 2008

The Minerals Metals & Materials Society

The separation of nickel from the aluminum present in spent catalysts and different metallic industrial residues, is proposed in the following systems: alloy Al2Ni and the mixtures 50 wt% Ni + 50 wt% Al, 10 wt% Ni + 90 wt% Al2O3 and 12 wt% NiO + 88 wt% Al2O3. The experiments were carried out in a tubular reactor with a flow of 2 l/h of gaseous chlorine and from 200º to 800 ºC. The final products of the reaction, extracted from the hottest zones of the reactor where characterized by XRD, SEM, EDS, AA and XRF, as NiCl2 y NiCl2.6H2O while in the coldest regions AlCl3 was deposited in the first two cases and in the other there was a residue of θ, α- Al2O3, sometimes mixed with some remainder of Ni and NiO. The procedure attained different separation factors which showed the optimun conditions for the recovery of both metals.