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FORM 25

 

(12) PATENT

(19) AP

   

 

 

 

 

 

   

(11)

Patent No :

 

AP 1940

(73) Applicant(s)

   

(21)

Application No :

AP/P/2000/001951

LEWIS -GRAY Elizabeth Beatrice Gail, Gekko Systems Pty

   

Ltd, 321 Learmouth Road, Ballarat, Victoria 3350,

   

 

 

 

 

 

   

(22)

Filing Date :

 

01.03.1999

Australia

   

(24)

Date of Grant &

 

 

LEWIS -GRAY Alexander Hamilton, Gekko Systems Pty Ltd ,

   

19.01.2009

321  Learmouth Road, Ballarat, Victoria 3350,

   

(45)

Publication :

 

Australia

   

 

 

 

   

 

 

 

 

 

 

   

(30)

Priority Data

 

 

 

(72) Inventors

   

 

(33) Country

(31) Number

(32) Date

LEWIS -GRAY Alexander Hamilton, Australia

   

 

AU

PP2304

 

13.03.1998

(74) Representative

   

(84)

Designated State

 

 

   

 

 

 

   

 

GH   ZW

 

 

 

GALLOWAY & COMPANY

   

 

 

 

 

 

 

 

(51)

International

Classification

C22B 3/12 (2006.01)

 

 

 

(54)     Title

Apparatus and methods for recovering valuable metals.

 

(57)     Abstract

Apparatus and method for continuously separating a dense valuable material such as gold from a feed including a grinding mill (2) which directs a crushed feed through hydrocyclones (9) for separation into a light and dense fraction, the dense fraction is concentrated further by in Line Pressure Jigs (16, 17) in line and the concentrate (23) is leached in a rotating reactor (45). The resulting pregnant liquor is subjected to electrowinning (83) to recover gold and the spent liquor is recycled.

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