Pickling baths contg. iron - purified by heating, neutralising to control pH and oxidising ferrous to ferric ions
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Thermal treatment of leaching residue from hydrometallurgical zinc production
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Process for the removal of mercury from gases
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Mercury removal of gases - by absorption onto sulphur containing activated charcoal
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Chloride removal - from zinc waste, with recovery of zinc
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Apparatus for sampling and examination of sludge and / or corrosive liquids.
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Method for separating iron from a sulfuric acid containing zinc sulphate solution.
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A process for the treatment of jarosite residues
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A process for the separation of iron from metal sulphate solutions and a hydrometallurgic process for the production of zinc
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Treatment of zinc-containing acid sulphate solutions to separate iron therefrom
