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Magnetic recovery of sulphur from coal in Brasil

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3 Author(s)
Trindade, S. ; Centro de Tecnologia Promon, Rio de Janeiro, Brasil. ; Saddy, M. ; Monteiro, J.

Magnetic recovery of pyritic sulphur and coal from mine rejects has been envisaged as a two-step sequence of processes. 1) A thermal decomposition of the mixture rich in pyrites at about 700°C which produces a magnetic pyrrhotite and liberates sulphur; 2) air transport of the solid product into a high-gradient magnetic separator to separate coal from the minerals. Analysis is made of results reported separately on the kinetics of thermal decomposition of pyrites, carried out in thermo-balance, and on the wet slurry magnetic processing of coals. A suggestion is made to pursue sulphur recovery from coal mine rejects by using a proposed all-dry fluidized bed process, after the previous effort of other authors on dry magnetic processing of pyrites mentioned in the literature. This suggestion is the principal aim of this work.

Published in:

Magnetics, IEEE Transactions on  (Volume:12 ,  Issue: 4 )

Date of Publication:

Jul 1976

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