Plant Visit Report

Plant visited JSPL Raigarh

Prepared by: Mr. Surya G Mr. Chandrasekhar N Mr. Sundhar GG

EAF Characteristics

Description Unit

JSPL (Raigarh) JSW

Shell Life Heats 600 400

Shell changing time Hrs 8 60

EBT change Heats 300 160-180

EBT changing time Hrs 4 8

Oxygen Injectors Nos 4 4

Injector Life Heats 600  

Injection System 

Lumar SIS

Injector type 

Non shrouding Shrouding

Carbon Injectors Nos 4+2 2

Facilities

Facilities Qty JSPL (Raigarh) JSW

Charging cranes Nos 2 1

Scrap charging crane Nos 1 0

Coke filling crane Nos 1 0

Casting cranes Nos 2 1

No Of Furnace Nos 1 1

Furnace capacity Ton 100 160

Spare Transformer Nos 1 0

LHF Nos 2 1

VD Nos 1 0

RH Nos 1 0

CCP Nos billet (closed) & combi Billet (open)

EBT filling dispenser (Pneumatic) Nos 1 0

Pot Carrier Nos 2 0

Heavy Dozer Nos 2 0

Techno parameters

Description Unit

JSPL (Raigarh) JSW (

No of Heats/day Nos 27 14

Avg. tap weight t 103 155

Avg. Seq size Nos 11 5.2

HM Charge % % 60.00 40.00

HDRI % % Nil 51.00

CDRI % % 40.4 8.00

Scrap % % NA 1.00

EAF Yield % 80.00 80.00

Heat Cycle Min 52 75

Power Factor   0.8-0.9 0.6-0.7

EAF Power KWh/TLS 380 430

LHF Power KWh/TLS 50 52

Electrode (EAF) Kg/TLS 1.7 2.40

Electrode (LHF) Kg/TLS 0.5 0.3

Injection Carbon Kg/TLS 14 16

Lime Consumption Kg/TLS 80 72

Dolo consumption Kg/TLS 40 68

EAF Slag FeO % 30.0 28.0

O2(EAF) Nm3/TLS 42 38

Protection near slag door

Refractory coating on launder runner

Delta heating method

EBT filling (Pneumatic)

Heat shield in EBT side

Copper stripes between upper and lower shell

Electrode changing and placing

Lumar Non-Shrouding and coke injection system

To be implemented for 27 heats

Additional casting crane required Power factor improvement One more horizontal Preheater required Pot carrier Nikko coke injection ready Electrode re-setting desk Electrode pneumatic tightening device ready Water spray arrangement to the elbow tray for faster cleaning One more Oxygen point at back side launder to clean launder

jam (for safety).