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Technical
Note Dissolution of galena with
acidified hypochlorous acid in excess chloride solution
A study of the dissolution of lead from powdered galena ore using acidified
hypochlorous acid in excess chloride has been investigated. The effect of
acid concentrations ranging from 10-33.8%, in temperatures between 30-50oC,
speed of agitation in the range of 300-600rpm and particle size of between
100–300µm on galena dissolution are reported. The
dissolution is significantly influenced by the concentration of hypochlorous
acid but temperature of the reactions and size of particles has an inverse
relation. The increase in speed of agitation is independent on the
dissolution of the galena sample. The apparent activation energy is found to
be 45.0kJ/mol suggesting the reaction is chemical control at the surface of
the particles. |
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