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(11)    Patent No :    AP 2312   
(21)    Application No :    AP/P/2008/004371   
(22)    Filing Date :    08.08.2006   
(24)    Date of Grant &    24.10.2011   
           
(45)    Publication :

(30)  Priority Data       
(33) Country    (31) Number    (32) Date
AU    2005904395    15.08.2005
(84)    Designated State

BW    GM    GH    KE    LS    MW  MZ   NA   SL
SD    SZ    T Z    UG    ZM    ZW
 

(73) Applicant(s)

XSTRATA TECHNOLOGY PTY LTD, Level 4, 307 Queen

Street, Brisbane, Queensland 4000,
Australia

(72) Inventors

ANDERSON Gregory Stephen, Australia

CURRY Daniel Charles, Australia

PEASE Joseph Damian, Australia

et al

(74) Representative

GILL, GODLONTON & GERRANS

ZIMBABWE
 

(51)  International  Classification   B02C4/00 (2006.01)    B02C15/00 (2006.01)
B02C17/00 (2006.01)   


(54)    Title

Method for increasing efficiency of grinding of ores, minerals and concentrates

(57)    Abstract

A method for reducing particle size of a particulate comprising feeding a feed material to a grinding mill having a power of at least 500kW, the mill having a specific power draw of at least 50kW per cubic metre of grinding volume of the mill and the grinding mill including a grinding media comprising particulate

material having a specific gravity of not less than 2.4 tonnes/m3 and a particle size falling in the range of from about 0.8 to 8mm, grinding the feed material in the grinding mill and removing a product from the grinding mill, the product having a particle size range such that D80 of the product is at

(56)    Documents Cited :    WO-02068333    US-5085889    JP-2003305378

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