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AssigneesThe Broken Hill Associated Smelters Proprietary Limited, Monash University
InventorsFrank Lawson, Denby H. Ward, Robert G. Kelly
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Apparatus for the continuous sulphur drossing of lead to reduce its copper content including a plurality of reaction vessels arranged in series, each reaction vessel having a curved bottom and a stirrer for creating a vortex of the contents. Bullion and sulphur are fed into the series through a vortex at controlled rates and through the series at controlled temperatures and a controlled total reaction time, optimally between 8 and 15 minutes. The bullion, dross and unreacted sulphur, if any, are overflowed from vessel to vessel and into an unagitated vessel for separation of the dross and bullion. The bullion feed device splits the undrossed bullion into a metered stream and an unmetered stream, the unmetered stream being utilized to carry away the separated dross for further processing.
Apparatus for the continuous sulphur drossing of lead to reduce the copper content thereof which comprises a plurality of reaction vessels arranged in series, a stirring device in each reaction vessel for vigorously agitating the material therein, means for continuously feeding bullion to the first reaction vessel, means for continuously feeding sulphur to the first reaction vessel, a bullion feed rate controlling device for controlling the feed rate of the bullion, a sulphur feed rate controlling device for controlling the feed rate of the sulphur, means for heating the bullion in each reaction vessel, means for controlling the temperature of the bullion in each reaction vessel, means for continuously and concurrently flowing bullion, dross and any unreacted sulphur from each reaction vessel to the next in sequence, without back-mixing, an unagitated separation vessel, means for continuously and concurrently flowing decoppered bullion and dross from the final reaction vessel to the separation vessel, means for scraping the dross from the surface of the decoppered bullion in the separation vessel, and means for continuously withdrawing decoppered bullion from the separation vessel, wherein the bullion feed rate controlling device splits the feed bullion stream into a controlled bullion stream and a variable excess bullion stream, the controlled bullion stream being fed to the series of reaction vessels.
Apparatus for the continuous sulphur drossing of lead to reduce the copper content thereof comprising:
Dependencies are inferred from the claim text.