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Recovery of Antimony Trioxide Flame Retardants from Lead Refining Residues by Slag Conditioning and Fuming
Author(s) -
Binz Florian,
Friedrich Bernd
Publication year - 2015
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.201500071
Subject(s) - antimony , antimony trioxide , refining (metallurgy) , slag (welding) , metallurgy , antimony oxide , waste management , materials science , chemistry , fire retardant , engineering , oxide
Bottom‐up process design is performed for a new antimony white fuming approach from antimony‐rich lead refining residues. Thermochemical modelling is used to evaluate process boundaries regarding temperature and slag composition allowing the fuming of qualified antimony white from mentioned residues. Two methods are evaluated in laboratory scale to test possibilities of preconditioning for the fuming process. The first one is based on a more selective oxidation during lead softening; the second one on carbothermic reduction of the slag. Antimony enrichment is successfully proven under laboratory scale conditions.