Doshi Technologg()ies (P) Ltd.doshiassociates.net/product_presentation.pdf · doshi technologies...

Doshi Technologies (P) Ltd.Doshi Technologies (P) Ltd.g ( )g ( )INTRODUCTIONINTRODUCTION

ELECTRIC ARC & LADLE REFINING FURNACEELECTRIC ARC & LADLE REFINING FURNACE

DOSHI TECHNOLOGIES (P) LTD.DOSHI TECHNOLOGIES (P) LTD.www.doshiassociates.netwww.doshiassociates.net

ELECTRIC ARC FURNCEELECTRIC ARC FURNCEELECTRIC ARC FURNCE ELECTRIC ARC FURNCE AND AND

LADLE REFINING LADLE REFINING FURNACEFURNACE

DOSHI TECHNOLOGIES (P) LTD.DOSHI TECHNOLOGIES (P) LTD.www.doshiassociates.netwww.doshiassociates.net 22

SALIENT FEATURESSALIENT FEATURESSALIENT FEATURESSALIENT FEATURESCompact design with minimum space requirementsCompact design with minimum space requirementsCompact design with minimum space requirementsCompact design with minimum space requirementsUser friendly for ease of operation and maintenance.User friendly for ease of operation and maintenance.Low refractory wear due to small pitch circle diameterLow refractory wear due to small pitch circle diameterT b l R f D iT b l R f D iTubular Roof DesignTubular Roof DesignExact guidance of electrode mast with selfExact guidance of electrode mast with self--centering guide rollerscentering guide rollersPositive Clamping For Electrode to ensure Zero SlippagePositive Clamping For Electrode to ensure Zero SlippageUserUser--friendly digital electrode regulation system friendly digital electrode regulation system Designed for metal movement by transfer trolley or with gantry Designed for metal movement by transfer trolley or with gantry swiveling arrangements.swiveling arrangements.Furnace operations and control are automated with PLC and Furnace operations and control are automated with PLC and computer based Human Interface which are very friendly to operate computer based Human Interface which are very friendly to operate and maintain.and maintain.F t li ti t i i i d fF t li ti t i i i d fFrom conceptualization to commissioning, under one roof.From conceptualization to commissioning, under one roof.In house manufacturing facilities.In house manufacturing facilities.

33DOSHI TECHNOLOGIES (P) LTD.DOSHI TECHNOLOGIES (P) LTD.

www.doshiassociates.netwww.doshiassociates.net

DESIGN CONCEPT FOR LRFDESIGN CONCEPT FOR LRFDESIGN CONCEPT FOR LRFDESIGN CONCEPT FOR LRFE ti t d C l TiE ti t d C l Ti LRFLRFEstimated Cycle Time Estimated Cycle Time –– LRFLRF ::Ladle positioning on the ladle carLadle positioning on the ladle car : 1.5min: 1.5minLadle car travel & Roof lowering on the ladleLadle car travel & Roof lowering on the ladle : 1 5min: 1 5minLadle car travel & Roof lowering on the ladleLadle car travel & Roof lowering on the ladle : 1.5min: 1.5minTemperature measurement & samplingTemperature measurement & sampling : 2.0min: 2.0minFerroFerro--alloys and flux additionalloys and flux addition : 6.0min: 6.0minyyTemperature raisingTemperature raising : 20.0min: 20.0minWire feeding (if required)Wire feeding (if required) : 2.0min: 2.0minFinal temperature raising and samplingFinal temperature raising and sampling : 2.0min: 2.0minFinal adjustment for homogenizationFinal adjustment for homogenization : 2.0min: 2.0minRoof lifting after treatment and ladle car travelRoof lifting after treatment and ladle car travel : 1 5min: 1 5minRoof lifting after treatment and ladle car travelRoof lifting after treatment and ladle car travel : 1.5min: 1.5minLadle lifting from the ladle carLadle lifting from the ladle car (Approx.)(Approx.) : 1.5min : 1.5min Total Cycle TimeTotal Cycle Time : : 40.040.0minminyy

LIST OF INSTALLATIONSLIST OF INSTALLATIONSCUSTOMERCUSTOMER FURNACE TYPEFURNACE TYPE CAPACITYCAPACITYCUSTOMERCUSTOMER FURNACE TYPEFURNACE TYPE CAPACITYCAPACITY

MAHINDRA UGINE STEEL MAHINDRA UGINE STEEL CO. LTD, KHOPOLICO. LTD, KHOPOLI

LADLE REFINING FURNACELADLE REFINING FURNACE 50 MT / 10 MVA 50 MT / 10 MVA

USHA MARTIN LIMITED, USHA MARTIN LIMITED, JAMSHEDPURJAMSHEDPUR

LADLE REFINING FURNACELADLE REFINING FURNACE 40MT / 6 MVA40MT / 6 MVA

SHAIFALI ROLLS LIMITED, SHAIFALI ROLLS LIMITED, LADLE REFINING FURNACELADLE REFINING FURNACE 30 MT / 6 MVA30 MT / 6 MVAGANDHIDHAMGANDHIDHAM

SUNFLAG IRON & STEEL CO. SUNFLAG IRON & STEEL CO. LTD, NAGPURLTD, NAGPUR

LADLE REFINING FURNACELADLE REFINING FURNACE 60MT / 11 MVA60MT / 11 MVA

AMRELI STEELS LIMITED, AMRELI STEELS LIMITED, KARACHI PAKISTANKARACHI PAKISTAN

LADLE REFINING FURNACELADLE REFINING FURNACE((UNDER COMMISSIONING)UNDER COMMISSIONING)

30 MT / 6 MVA30 MT / 6 MVA

BSRM IRON & STEEL MILLS, BSRM IRON & STEEL MILLS, CHITTAGONG BANGLADESHCHITTAGONG BANGLADESH

LADLE REFINING FURNACELADLE REFINING FURNACE 30 MT / 6 MVA30 MT / 6 MVACHITTAGONG, BANGLADESHCHITTAGONG, BANGLADESH

CEW, LUCKNOWCEW, LUCKNOW ELECTRIC ARC FURNACE ELECTRIC ARC FURNACE (UNDER COMMISSIONING)(UNDER COMMISSIONING)

5 MT / 2.4 MVA5 MT / 2.4 MVA

FRONTIER ALLOYS &FRONTIER ALLOYS & ELECTRIC ARC FURNACEELECTRIC ARC FURNACE 3MT / 1 5 MVA3MT / 1 5 MVAFRONTIER ALLOYS & FRONTIER ALLOYS & STEELS LTD, PAONTA SAHIBSTEELS LTD, PAONTA SAHIB

ELECTRIC ARC FURNACEELECTRIC ARC FURNACE 3MT / 1.5 MVA3MT / 1.5 MVA

R L ENERGY & STEELS LTD. R L ENERGY & STEELS LTD. AURANGABADAURANGABAD

ELECTRIC ARC FURNACEELECTRIC ARC FURNACE 25 MT / 15 MVA25 MT / 15 MVA

HILL METAL EST, JEDDAHHILL METAL EST, JEDDAH LADLE REFINNING FURNACE LADLE REFINNING FURNACE (UNDER EXECUTION)(UNDER EXECUTION)

30 MT / 6 MVA30 MT / 6 MVA

ELECTRIC ARC FURNACE ELECTRIC ARC FURNACE SHOP ASSEMBLIED SHOP ASSEMBLIED

Compact design Compact design with minimum with minimum spacespacespace space requirementsrequirementsUser friendly forUser friendly forUser friendly for User friendly for ease of operation ease of operation and maintenance.and maintenance.Low refractory Low refractory wear due to small wear due to small pitch circle pitch circle diameterdiameter



MAST ASSEMBLY WITH ELECTRODE HOLDING ARMSMAST ASSEMBLY WITH ELECTRODE HOLDING ARMS


ELECTRODE HOLDING ARMSELECTRODE HOLDING ARMSWith Working Platform & Bus TubesWith Working Platform & Bus Tubes

Smallest Possible Smallest Possible PCD for a givenPCD for a givenPCD for a given PCD for a given Electrode size.Electrode size.Electrode Holders are Electrode Holders are W t C l dW t C l dWater Cooled.Water Cooled.Positive Clamping Positive Clamping type Electrode type Electrode G i i li dG i i li dGripping cylinder Gripping cylinder ––Spring Loaded.Spring Loaded.Copper Bus Tubes on Copper Bus Tubes on ArmsArmsInsulated & Rigid Arm Insulated & Rigid Arm Holding & Adjusting Holding & Adjusting g j gg j gBolts.Bolts.Integrated Working Integrated Working platformplatformpp



6 MVA6 MVA 30 MT LRF ERECTED AT SITE30 MT LRF ERECTED AT SITE6 MVA 6 MVA -- 30 MT LRF ERECTED AT SITE30 MT LRF ERECTED AT SITE



GENERAL LAYOUT FOR LRFGENERAL LAYOUT FOR LRFGENERAL LAYOUT FOR LRFGENERAL LAYOUT FOR LRF



LAYOUT LAYOUT –– LADLE REFINING FURNACELADLE REFINING FURNACE



HYDRAULIC POWER PACK WITH PROPORTIONAL HYDRAULIC POWER PACK WITH PROPORTIONAL CONTROL VALVES & ACCUMALOTORSCONTROL VALVES & ACCUMALOTORSCONTROL VALVES & ACCUMALOTORSCONTROL VALVES & ACCUMALOTORS

High Pressure High Pressure Hydraulic system with Hydraulic system with P ti l t lP ti l t lProportional control Proportional control valve.valve.Valves with On BoardValves with On BoardValves with On Board Valves with On Board amplification & signal amplification & signal control cards.control cards.Piston Accumulators Piston Accumulators for Normal & for Normal & Emergency operationEmergency operationEmergency operation.Emergency operation.100% Standy Pumps 100% Standy Pumps with motors.with motors.

COMPLETE HIGH PRESSURECOMPLETE HIGH PRESSUREComplete with Complete with Interconnecting piping Interconnecting piping & accessories& accessories

COMPLETE HIGH PRESSURE COMPLETE HIGH PRESSURE HYDRAULIC POWER PACK WITH HYDRAULIC POWER PACK WITH

PROPORTIONAL CONTROL VALVE, PROPORTIONAL CONTROL VALVE, & accessories.& accessories. PUMPS & OTHER COMPONENTS.PUMPS & OTHER COMPONENTS.1212


SECONDARY LOW VOLTAGE DELTA SECONDARY LOW VOLTAGE DELTA ––FURNACE TRANSFORMERFURNACE TRANSFORMERFURNACE TRANSFORMERFURNACE TRANSFORMER



ELECTRODE REGULATIONELECTRODE REGULATIONELECTRODE REGULATIONELECTRODE REGULATIONCurrentArc StabilityArc StabilityActive Power InputElectrode ConsumptionRefractory ConsumptionRefractory ConsumptionEnergy Consumption

Electrode MovementsElectrode MovementsSetpoint keepingSafety Functions

Functions of a classical electrode control systemFunctions of a classical electrode control system

Measurement of Voltages and CurrentsI d R l i

Overcurrent LimitationT h D SImpedance Regulation

Set-Point Memory Touch Down Stop

PLC BASED CONTROL PANEL WITH PC BASED HMIPLC BASED CONTROL PANEL WITH PC BASED HMI



OPERATOR CONSOLE WITH HMIOPERATOR CONSOLE WITH HMIPLC based Furnace PLC based Furnace Control System.Control System.Computer Based HMI Computer Based HMI with screen to operate with screen to operate and control the furnaceand control the furnaceand control the furnace and control the furnace from control pulpit.from control pulpit.User friendly, proven User friendly, proven y, py, pelectrode regulation electrode regulation system interfaced with system interfaced with furnace controls &furnace controls &furnace controls & furnace controls & protection system.protection system.Can be connected to Can be connected to existing Management existing Management Information System.Information System.



SUB ASSEMBLIESSUB ASSEMBLIESSUB ASSEMBLIES SUB ASSEMBLIES FOR EAF AND LRFFOR EAF AND LRFFOR EAF AND LRFFOR EAF AND LRF



ELECTRODE HOLDING ARMS WITH COPPER BUS TUBES & ELECTRODE HOLDING ARMS WITH COPPER BUS TUBES & HYDRAULIC CLAMPING CYLINDERHYDRAULIC CLAMPING CYLINDERHYDRAULIC CLAMPING CYLINDERHYDRAULIC CLAMPING CYLINDER


FUME EXTRACTION DUCT FOR 110 MT EAFFUME EXTRACTION DUCT FOR 110 MT EAF



WATER COOLED ROOF FOR 60 MT EAFWATER COOLED ROOF FOR 60 MT EAF



WATER COOLED ROOF WATER COOLED ROOF -- EAF EAF ––SHELL INNER DIA. 3600MMSHELL INNER DIA. 3600MM



WATER COOLED ROOF EAF WATER COOLED ROOF EAF



WATER COOLED ROOF 30 MT LRFWATER COOLED ROOF 30 MT LRF



MAST ASSEMBLY WITH GUIDE ROLLERS & MAST ASSEMBLY WITH GUIDE ROLLERS & HYDRAULIC CYLINDERS FOR LRFHYDRAULIC CYLINDERS FOR LRF



MAST ASSEMBLY WITH GUIDE ROLLERS & HYDRAULIC MAST ASSEMBLY WITH GUIDE ROLLERS & HYDRAULIC CYLINDERS FOR LRFCYLINDERS FOR LRF



INDUCTION FURNACEINDUCTION FURNACEINDUCTION FURNACEINDUCTION FURNACESPARES ANDSPARES ANDSPARES AND SPARES AND

ACCESSORIESACCESSORIESACCESSORIESACCESSORIES


INDUCTION FURNACE INDUCTION FURNACE TILTING SHELLTILTING SHELL



INDUCTION FURNACE SHELL ASSEMBLED INDUCTION FURNACE SHELL ASSEMBLED WITH COIL, YOKE & TILTING CYLINDERWITH COIL, YOKE & TILTING CYLINDER

INDUCTION COIL

ACCESSORIES FORACCESSORIES FORACCESSORIES FOR ACCESSORIES FOR STEEL PLANT &STEEL PLANT &STEEL PLANT & STEEL PLANT &

FOUNDRIESFOUNDRIESFOUNDRIESFOUNDRIES


LADLE TRANSFER CARLADLE TRANSFER CARLADLE TRANSFER CARLADLE TRANSFER CAR



SCRAP CHARGING BUCKETSSCRAP CHARGING BUCKETSSCRAP CHARGING BUCKETSSCRAP CHARGING BUCKETS• Environment Friendly

• Detachable Bail Arm

•Suitable for Induction Furnace Charging

•Increases productivityIncreases productivity

•Reduces the use of Shop Crane and hence increases its

il bilitavailability

•Can be used with all kinds of scrapp

•Reduces no. of charges



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