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A method for recovering rhenium and other metals from rhenium-bearing materials

A technology for platinum group metals and metal salt solutions, which can be used in chemical instruments and methods, rhenium compounds, and the improvement of process efficiency, and can solve problems such as shortages

Inactive Publication Date: 2013-03-27
WORLD RESOURCES CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, some Re-containing materials have been disposed of in landfills due to the lack of methods that can effectively recover Re

Method used

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  • A method for recovering rhenium and other metals from rhenium-bearing materials

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Embodiment Construction

[0017] A variety of Re-containing materials can be treated in accordance with the present invention. For example, the figures show that these materials may include Re-containing superalloy residues and waste 20, Re-containing plasma spray deposited overspray residues 40, materials from other sources such as Re-containing ore materials 50, and / or Re-containing waste and cermet catalysts 60 .

[0018] When the Re-containing material is from a superalloy waste or residue material 20 such as machining fluid or filter media, the superalloy waste or residue material 20 is first mixed with a slurry 10 such as an aqueous solution. The aqueous solution and superalloy waste or residue material 20 are thoroughly agitated or subjected to a media emulsification process 30 to form a Re-containing mixture. The Re-containing mixture is then combined with other Re-containing materials such as Re-containing superalloy residues and waste 20, Re-containing plasma spray deposited overspray residu...

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Abstract

The present invention relates to a method of recovering rhenium (Re) and other metals from Re-bearing materials including, as an exemplary process, the steps: (i) adding Re-bearing materials into a leaching slurry; (ii) adjusting the pH of the slurry to obtain Re in soluble form in a metal salt solution and insoluble residues; (iii) filtering the metal salt solution to remove the insoluble residues; (iv) selectively precipitating Re from the metal salt solution; (v) filtering the Re precipitate from the metal salt solution to obtain a Re filtercake; (vi) formulating and drying the Re filtercake to obtain a Re sulfide product; (vii) combining the Re sulfide product with a Molybdenum (Mo) concentrate containing Re to obtain a Mo / Re concentrate; (viii) roasting the Mo / Re concentrate to obtain Mo oxide product and a flue gas containing Re; and (ix) treating the flue gas containing Re to obtain ammonium perrhennate.

Description

technical field [0001] The present invention relates to a method for recovering rhenium (Re) from Re-containing materials. Background technique [0002] Rhenium (Re) is one of the rarest metals on Earth and is found almost exclusively in copper sulfide deposits containing extractable amounts of molybdenum (Mo). Re is found in the molybdenite fraction of this particular type of copper (Cu) ore. As a result, many methods of separating Re from this molybdenite fraction have been developed. [0003] US Patent No. 3,739,549 recovers Re from ore materials by using a roasting method. Mo and Re were first separated from Cu by froth flotation method. The portion containing Mo and Re then undergoes a firing process to separate Mo and Re. Re is largely converted to rhenium heptoxide (Re 2 o 7 ), rhenium heptoxide is volatile and is discharged together with the waste gas generated by roasting. The flue gas undergoes a wet scrubbing process which will contain Re 2 o 7 The fumes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B26/12C22B7/00
CPCC01G39/02C22B7/007C01G47/00C22B61/00C22B3/44Y02P10/20
Inventor E·吕德里茨U·R·施莱格尔P·T·哈尔平D·L·施内克
Owner WORLD RESOURCES CORP
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