Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1998-11-02
2000-09-12
Warden, Jill
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75740, 423 87, 423 92, 423 98, 4236583, C21B 1500
Patent
active
06117209&
ABSTRACT:
A hydrometallurgical method involves treating a dross source containing typically both antimony and tin and treating the dross to a series of chemical operations to yield a soft lead precursor, suitable for making soft lead for lead-based alloys for batteries or other applications, which method includes utilizing sulfuric acid to decompose the dross source to provide a slurry in which the liquid contains the principal tin values and the solid phase contains the antimony and lead values, followed by treating of the separated solid phase so as to either separate the lead values from the antimony values via an antimony leach and a solid/liquid separation or by desulfurizing the solid phase, carrying out a solid/liquid separation, treating the solid phase with a lead leach to solubilize the lead values and carrying out a further solid/liquid separation to recover the lead-rich phase as the filtrate, separated from the antimony-rich solid phase.
REFERENCES:
patent: 5053076 (1991-10-01), Burany et al.
patent: 5961691 (1999-10-01), Pinard et al.
GNB Technologies, Inc.
McGuthry-Banks Tima
Warden Jill
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