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(11)    Patent No :    AP 2309   
(21)    Application No :    AP/P/2008/004472   
(22)    Filing Date :    29.11.2006   
(24)    Date of Grant &    08.10.2011   
           
(45)    Publication :

(30)  Priority Data       
(33) Country    (31) Number    (32) Date
ZA    2005/10305    20.12.2005

(84)    Designated State

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

(73) Applicant(s)

GREYLING Frederik Petrus, 53 Coetzee Street, Middelburg,

Mpumalanga 1050,
South Africa

SWART Petrus Hermanus, 6 Zambezi Retirement Village,
531 Zambezi Village, Montana, Pretoria 0159,

South Africa

(72) Inventors

GREYLING Frederik Petrus, South Africa

SWART Petrus Hermanus, South Africa

(74) Representative

HONEY & BLANCKENBERG
 

(51)  International  Classification   F27D11/08 (2006.01)    F27B3/08 (2006.01)
C21C5/52 (2006.01)   


(54)    Title

Compensation system and method for arc skewing for a DC arc furnace

(57)    Abstract

A DC arc furnace system (10) comprises an arc furnace comprising an electrode (24) extending into a vessel (14). A main DC power supply (28) is connected to the electrode and to an anode region (35) at a base of the vessel by a main furnace circuit (25) comprising an anode conductor (40) connected to the anode region and extending from the anode region externally of the vessel to the main DC power supply. The system (10) further

comprises an arc deflection compensation system (50) comprising a compensation circuit (52) separate from the main furnace circuit and which compensation circuit is energized by a compensation power supply (54) which is separate from the main power supply (28)The compensation circuit generates a magnetic field (54) in an arc region (44) of the furnace in a direction opposite to the direction of a field (46) generated by the main circuit

(56)    Documents Cited :    JP-09061065 A    DE-2228596 A1    JP-10318684

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