Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1984-12-06
1987-02-03
Doll, John
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75109, 75118R, 423 37, 423 42, 204109, C22B 1104
Patent
active
046407103
ABSTRACT:
The invention relates to a process for recovering silver in sulfuric solutions. Its characterizing feature is that the silver solution is contacted with a quantity of zinc sulfide which is at least equal to the stoichiometric quantity and the surface area of which is at least equal to K Ag.sup.2/3 x V, K being a constant, Ag being the silver concentration in the solution expressed in kilograms per cubic meter, and V the volume of the solution in cubic meters, the surface area being expressed in square meters and the value of K being greater than or equal to approximately 10. Application to the recovery of silver in zinc plant residues.
REFERENCES:
patent: 935337 (1909-09-01), Thwaites
patent: 3902896 (1975-09-01), Borbely
patent: 4278539 (1981-07-01), Santhanam et al.
Beutier Didier
Predali Jean-Jacques
Doll John
Societe Miniere et Metallurgique de Penerroya
Stoll Robert L.
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