Title:
METHOD AND EQUIPMENT FOR HANDLING DROSS AND RECOVERING THE NON-FERROUS METALS CONTAINED THEREIN
Document Type and Number:
WIPO Patent Application WO2002042502
Kind Code:
B1
Abstract:
The present invention refers to a method and respective apparatus for the recovery of the free metal present in hot dross which is produced when non-ferrous metals are processed at temperatures above their melting point. The method consists of charging the hot dross collected from the liquid bath surface of holding or melting furnaces, directly into an equipment provided with thermal insulation and means for control of its internal atmosphere. This operation is followed by the transportation of such an equipment to a processing unit located not far from the site were the dross has been generated. The processing unit being provided with transfer devices and one or more sealed rotary furnaces provided with controlled atmosphere, which work in the accumulation and agitation of the dross, and the subsequent separation of the free metal contained therein. The equipment used in the recovery of non-ferrous metals present in dross, object of the present invention, consists of a recipient provided with thermally insulated walls, and a cover also thermally insulated that is well adjusted to the body of the recipient, and is provided with an inert gas injection port, a lifting and transfer device for removing the dross from the recipient into a feeding device well adjusted to the door of a sealed furnace that acts both as a dross accumulator and in the free metal separation from dross.
Inventors:
DA CRUZ ANTONIO CARLOS (BR)
Application Number:
PCT/BR2001/000142
Publication Date:
December 27, 2002
Filing Date:
November 21, 2001
Export Citation:
Assignee:
INST PESQUISAS TECH (BR)
DA CRUZ ANTONIO CARLOS (BR)
DA CRUZ ANTONIO CARLOS (BR)
International Classes:
C22B7/00; C22B7/04; C22B21/00; (IPC1-7): C22B21/00; C22B7/00; F27D3/12
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