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Method for treating waste containing precious metals and device for implementing said method

a precious metal and waste technology, applied in the field of precious metal treatment waste, can solve the problems of poorly adaptable to producing rare and precious metals in small amounts, and generate an increasing amount of waste containing rare and precious metals, and achieve the effect of reducing the carrying away of precious metals by metal oxides

Inactive Publication Date: 2010-07-22
TERRA NOVA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

"The invention relates to a method and installation for treating waste containing precious metals. The method involves contacting the waste with a molten lead-based composition, skimming the mixture, and refining the skimmed mixture by electrolysis to recover the precious metals. The skimming step involves removing residues from the waste, which are then returned to the molten lead-based composition. The recovered materials can be reused or sold. The technical effects of the invention include efficient recovery of precious metals from waste and reduced environmental impact of waste treatment."

Problems solved by technology

The increase in the use of calculating machines, mobile phones, electronic apparatuses and other short life high-tech apparatuses generates an increasing amount of waste containing rare and precious metals.
This situation poses the problem of recovering and treating the metals contained in this waste.
Present methods are therefore optimized in order to produce lead, copper or pure zinc in large amounts, but they are poorly adapted for producing rare and precious metals present in small amounts.

Method used

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  • Method for treating waste containing precious metals and device for implementing said method
  • Method for treating waste containing precious metals and device for implementing said method
  • Method for treating waste containing precious metals and device for implementing said method

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Embodiment Construction

[0073]The invention is now described in more detail and in a non-limiting way in the following description.

[0074]Waste Treatment Installation

[0075]Referring to FIG. 1, an installation for treating waste according to the invention schematically comprises the following components. Provision is made for a waste feed line 1 at the entry of the treatment installation. This waste feed line 1 may optionally be connected to the outlet of the milling and analysis means 1ter fed by a raw waste feed line 1bis. The waste feed line 1 like all the other feed, transfer or withdrawal lines mentioned in the present description may include a single route or several routes (branches) in parallel.

[0076]According to an embodiment, the waste feed line 1 feeds pyrolysis means 2. At the outlet of the pyrolysis means 2, provision is made for means for feeding primary materials 6, which feed copper extraction means 37. At the outlet of the copper extraction means 37, provision is made for a pre-treated mater...

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Abstract

The application relates to a method for treating waste containing precious metals, said method comprising the following successive steps: the waste is brought into contact with a composition based on molten lead; the mixture obtained is skimmed; and the skimmed mixture is refined by electrolysis in such a way as to recover the precious metals. The application also relates to a waste treatment installation for implementing said method.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a National Phase Entry of International Application No. PCT / FR2007 / 001728, filed Oct. 19, 2007, which claims priority to French Patent Application No. 0609219, filed Oct. 20, 2006, both of which are incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention relates to a method for treating waste containing precious metals as well as a device for implementing this method.TECHNICAL BACKGROUND[0003]The increase in the use of calculating machines, mobile phones, electronic apparatuses and other short life high-tech apparatuses generates an increasing amount of waste containing rare and precious metals. This situation poses the problem of recovering and treating the metals contained in this waste. Such waste is thus a real source of non-ferrous, rare and precious metals.[0004]Electronic waste is presently collected, exported and treated in large industrial complexes for non-ferrous metals often requi...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C25C1/20C25C7/00
CPCB03B9/061C22B11/021C22B7/001Y02P10/20
Inventor THPMAS, CHRISTIAN
Owner TERRA NOVA INC
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