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US 8,734,563 B2Granted
Method and plant for the production of zinc dust
AssigneeZinchem, A Division of Zimco Group (Pty) Ltd.
InventorsMichael Hanneman, Roy William Heslop
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Abstract
A method of production of Zinc dust, which includes melting Zinc products in a melting furnace on a semi-continuous basis, transferring at least a part of the molten Zinc products to a vaporizing furnace, vaporizing the molten Zinc in the vaporizing furnace into Zinc vapor on a substantially continuous basis, transferring Zinc vapor from the vaporizing furnace to a condenser, and condensing the Zinc vapor to form Zinc dust.
Claims4
A method of production of Zinc dust, which comprises
- pre-heating a melting furnace to a temperature of between 400° C. to 700° C.;
- melting Zinc products in the melting furnace to form molten Zinc products;
- reducing the temperature of the molten Zinc products to about 550° C.;
- transferring at least a part of the molten Zinc products to a vaporizing furnace using molten material transport means being in flow communication with the vaporizing furnace and a dip tube with a top end of the dip tube being in flow communication with the molten material transport means and a bottom end of the dip tube extending into a the crucible in the vaporizing furnace;
- maintaining the molten Zinc products in the vaporizing furnace at a pre-defined level above the bottom end of the dip tube;
- vaporizing the molten Zinc products in the vaporizing furnace into Zinc vapour;
- transferring Zinc vapour from the vaporizing furnace to a condenser;
- and
- condensing the Zinc vapour to form Zinc dust.
6 more elements
Dependencies are inferred from the claim text.