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DOSHI TECHNOLOGIES (P) LTD.www.doshiassociates.net
Doshi Technologies (P) Ltd.INTRODUCTION
ELECTRIC ARC & LADLE REFINING FURNACE
DOSHI TECHNOLOGIES (P) LTD.www.doshiassociates.net
ELECTRIC ARC FURNCEAND
LADLE REFININGFURNACE
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SALIENT FEATURES Compact design with minimum space requirements User friendly for ease of operation and maintenance. Low refractory wear due to small pitch circle diameter Tubular Roof Design Exact guidance of electrode mast with self-centering guide rollers Positive Clamping For Electrode to ensure Zero Slippage User-friendly digital electrode regulation system Designed for metal movement by transfer trolley or with gantry
swiveling arrangements. Furnace operations and control are automated with PLC and
computer based Human Interface which are very friendly to operateand maintain.
From conceptualization to commissioning, under one roof. In house manufacturing facilities.
3DOSHI TECHNOLOGIES (P) LTD.
www.doshiassociates.net
DESIGN CONCEPT FOR LRFEstimated Cycle Time – LRF :Ladle positioning on the ladle car : 1.5minLadle car travel & Roof lowering on the ladle : 1.5minTemperature measurement & sampling : 2.0minFerro-alloys and flux addition : 6.0minTemperature raising : 20.0minWire feeding (if required) : 2.0minFinal temperature raising and sampling : 2.0minFinal adjustment for homogenization : 2.0minRoof lifting after treatment and ladle car travel : 1.5minLadle lifting from the ladle car (Approx.) : 1.5minTotal Cycle Time : 40.0min
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LIST OF INSTALLATIONSCUSTOMER FURNACE TYPE CAPACITY
MAHINDRA UGINE STEELCO. LTD, KHOPOLI
LADLE REFINING FURNACE 50 MT / 10 MVA
USHA MARTIN LIMITED,JAMSHEDPUR
LADLE REFINING FURNACE 40MT / 6 MVA
SHAIFALI ROLLS LIMITED,GANDHIDHAM
LADLE REFINING FURNACE 30 MT / 6 MVA
SUNFLAG IRON & STEEL CO.LTD, NAGPUR
LADLE REFINING FURNACE 60MT / 11 MVA
AMRELI STEELS LIMITED,KARACHI PAKISTAN
LADLE REFINING FURNACE(UNDER COMMISSIONING)
30 MT / 6 MVA
BSRM IRON & STEEL MILLS,CHITTAGONG, BANGLADESH
LADLE REFINING FURNACE 30 MT / 6 MVA
CEW, LUCKNOW ELECTRIC ARC FURNACE 5 MT / 2.4 MVA
FRONTIER ALLOYS &STEELS LTD, PAONTA SAHIB
ELECTRIC ARC FURNACE 3MT / 1.5 MVA
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LIST OF INSTALLATIONSCUSTOMER FURNACE TYPE CAPACITY
R L ENERGY & STEELS LTD.AURANGABAD
ELECTRIC ARC FURNACE 25 MT / 15 MVA
ADHUNIK METALIKSROURKELA
LADLE REFINNING FURNACE 30 MT / 5 MVA
INDSUR USA, SAUDIFOUNDRY PROJECT
ELECTRIC ARC FURNACE 5 MT / 2.4 MVA
KSRM IRON & STEELROLLING MILLSCHITTAGONG BANGLADESH
LADLE REFINNING FURNACE 35 MT / 7 MVA
ABHIJEET GROUP –CORPORATE ISPAT,JAMSHEDPUR
2 NOS. X LADLE REFINNINGFURNACE
35 MT / 7 MVA
KAMALJEET SINGHAHLUWALIA KEONJHAR,ORISSA
LADLE REFINNING FURNACE 18 MT / 3.6 MVA
MITTAL CORP LIMITED,INDORE
LADLE REFINNING FURNACE 35 MT / 6 MVA
CALCUTTA SPRINGSLIMITED
ELECTRIC ARC FURNACE 5 MT / 2.4 MVA
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ELECTRIC ARC FURNACESHOP ASSEMBLIED
Compact designwith minimumspacerequirements
User friendly forease of operationand maintenance.
Low refractorywear due to smallpitch circlediameter
7DOSHI TECHNOLOGIES (P) LTD.
www.doshiassociates.net
MAST ASSEMBLY WITH ELECTRODE HOLDING ARMS
DOSHI TECHNOLOGIES (P) LTD.www.doshiassociates.net 8
ELECTRODE HOLDING ARMSWith Working Platform & Bus Tubes
Smallest PossiblePCD for a givenElectrode size.
Electrode Holders areWater Cooled.
Positive Clampingtype ElectrodeGripping cylinder –Spring Loaded.
Copper Bus Tubes onArms
Insulated & Rigid ArmHolding & AdjustingBolts.
Integrated Workingplatform
9DOSHI TECHNOLOGIES (P) LTD.
www.doshiassociates.net
LADLE FURNACESALIENT FEATURES
POSITIVE SLIP FREE ELECTRODECLAMPING BY SPRING LOADEDHYDRAULIC CYLINDER
PRISMATICALLY GUIDED MASTASSEMBLY FOR MINIMUM JERKAVOIDING ELECTRODE BREAKAGE
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LADLE FURNACESALIENT FEATURES
IN HOUSE MANUFACTURING ANDPREDESPATCH ASSEMBLY
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LADLE FURNACESALIENT FEATURES
IN HOUSE MANUFACTURING AND PRE-DESPATCH ASSEMBLY
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LADLE FURNACESALIENT FEATURES
MINERAL OIL BASED HYDRAULICSYSTEM
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LADLE FURNACESALIENT FEATURES
Hydraulic Pumps are specifically chosenfor mill duty application and reducedpower consumption.
Accumulator design is proven for smoothhydraulic operation as againstconventional pressure vessel design.
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LADLE FURNACESALIENT FEATURES
The proportional control valve are withfeedback control for better electroderegulation.
Accumulator design is proven for smoothhydraulic operation as againstconventional pressure vessel design.
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HYDRAULIC POWER PACK WITH PROPORTIONALCONTROL VALVES & ACCUMALOTORS
High PressureHydraulic system withProportional controlvalve.
Valves with On Boardamplification & signalcontrol cards.
Piston Accumulatorsfor Normal &Emergency operation.
100% Standy Pumpswith motors.
Complete withInterconnecting piping& accessories.
COMPLETE HIGH PRESSUREHYDRAULIC POWER PACK WITH
PROPORTIONAL CONTROL VALVE,PUMPS & OTHER COMPONENTS.
16DOSHI TECHNOLOGIES (P) LTD.
www.doshiassociates.net
LADLE FURNACESALIENT FEATURES
PLC BASED FURNACE CONTROLSYSTEM.
FURNACE IS OPERATED FROMCOMPUTER BASED HMI
SCADA ON HMI DISPLAYS ALLOPERATION AND CONTROL FEATURE
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DOSHI TECHNOLOGIES PRIVATE LIMITED,INDIA
DOSHI TECHNOLOGIES PRIVATE LIMITED,INDIA
DOSHI TECHNOLOGIESPRIVATE LIMITED, INDIA
DOSHI TECHNOLOGIES PRIVATE LIMITED,INDIA
DOSHI TECHNOLOGIESPRIVATE LIMITED, INDIA
DOSHI TECHNOLOGIES PRIVATE LIMITED,INDIA
PLC BASED CONTROL PANEL FOR EASEOF OPERATION, DIAGONSIS AND MIS
ELECTRODE REGULATIONCurrentArc StabilityActive Power InputElectrode ConsumptionRefractory ConsumptionEnergy Consumption
Electrode MovementsSetpoint keepingSafety Functions
Functions of a classical electrode control system
Measurement of Voltages and CurrentsImpedance RegulationSet-Point Memory
Overcurrent LimitationTouch Down Stop
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PLC BASED CONTROL PANEL WITH PC BASED HMI
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OPERATOR CONSOLE WITH HMI PLC based Furnace
Control System. Computer Based HMI
with screen to operateand control the furnacefrom control pulpit.
User friendly, provenelectrode regulationsystem interfaced withfurnace controls &protection system.
Can be connected toexisting ManagementInformation System.
24DOSHI TECHNOLOGIES (P) LTD.
www.doshiassociates.net
6 MVA - 30 MT LRF ERECTED AT SITE
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DOSHI TECHNOLOGIESPRIVATE LIMITED, INDIA
DOSHI TECHNOLOGIES PRIVATE LIMITED,INDIA
6 MVA - 30 MT LRF ERECTED AT SITE
27DOSHI TECHNOLOGIES (P) LTD.
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LADLE FURNACESALIENT FEATURES
DEPENDING OF SHOP LAYOUT, ROOFSWING OR FIXED ROOF TYPE LRFOFFERED.
FIXED ROOF TYPE LRF COMES WITHROOF LIFTING & LOWERING ANDLADLE TRANSFER CAR FOR LADLEMOVEMENT.
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LADLE REFINING FURNACE
29DOSHI TECHNOLOGIES (P) LTD.
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LAYOUT FOR LRF 3D MODEL
30DOSHI TECHNOLOGIES (P) LTD.
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LADLE TRANSFER CAR
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LADLE TRANSFER CAR WITH TILITNG ARRANGEMENT FOR DE-SLAGGING
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LADLE TRANSFER CAR WITH TILITNG ARRANGEMENT FOR DE-SLAGGING
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ARGON OR NITROGEN PURGING SYSTEM FOR LRF
34DOSHI TECHNOLOGIES (P) LTD.
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DOSHI TECHNOLOGIES PRIVATE LIMITED,INDIA
SECONDARY LOW VOLTAGE DELTA –FURNACE TRANSFORMER
35DOSHI TECHNOLOGIES (P) LTD.
www.doshiassociates.net
SUB ASSEMBLIESFOR EAF AND LRF
36DOSHI TECHNOLOGIES (P) LTD.
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ELECTRODE HOLDING ARMS WITH COPPER BUS TUBES &HYDRAULIC CLAMPING CYLINDER
DOSHI TECHNOLOGIES (P) LTD.www.doshiassociates.net 37
FUME EXTRACTION DUCT FOR 110 MT EAF
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WATER COOLED ROOF FOR 60 MT EAF
39DOSHI TECHNOLOGIES (P) LTD.
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WATER COOLED ROOF - EAF –SHELL INNER DIA. 3600MM
40DOSHI TECHNOLOGIES (P) LTD.
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WATER COOLED ROOF EAF
41DOSHI TECHNOLOGIES (P) LTD.
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WATER COOLED ROOF 30 MT LRF
42DOSHI TECHNOLOGIES (P) LTD.
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MAST ASSEMBLY WITH GUIDE ROLLERS &HYDRAULIC CYLINDERS FOR LRF
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MAST ASSEMBLY WITH GUIDE ROLLERS & HYDRAULICCYLINDERS FOR LRF
44DOSHI TECHNOLOGIES (P) LTD.
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DOSHI TECHNOLOGIES (P) LTD.www.doshiassociates.net
INDUCTION FURNACESPARES AND
ACCESSORIES
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INDUCTION FURNACETILTING SHELL
46DOSHI TECHNOLOGIES (P) LTD.
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INDUCTION FURNACE SHELL ASSEMBLEDWITH COIL, YOKE & TILTING CYLINDER
INDUCTION COIL
DOSHI TECHNOLOGIES (P) LTD.www.doshiassociates.net
ACCESSORIES FORSTEEL PLANT &
FOUNDRIES
SCRAP CHARGING BUCKETS• Environment Friendly
• Detachable Bail Arm
•Suitable for Induction FurnaceCharging
•Increases productivity
•Reduces the use of Shop Craneand hence increases itsavailability
•Can be used with all kinds ofscrap
•Reduces no. of charges
49DOSHI TECHNOLOGIES (P) LTD.
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