The plant visit report summarizes key characteristics and parameters of the electric arc furnace (EAF) at JSPL Raigarh and JSW. Some key differences highlighted include: - JSPL Raigarh's EAF shell lasts 600 heats compared to 400 heats for JSW's shell. - JSPL Raigarh has more facilities like charging cranes, coke filling cranes, and spare transformers. - JSPL Raigarh produces more heats per day (27 vs 14) and has a higher average tap weight (103t vs 155t) compared to JSW. - JSPL Raigarh uses a higher percentage of hot

1. Plant Visit Report
Plant visited JSPL Raigarh
Prepared by:
Mr. Surya G
Mr. Chandrasekhar N
Mr. Sundhar GG

2. 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

3. 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

4. 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

5. Protection near slag door

6. Refractory coating on launder runner

7. Delta heating method

8. EBT filling (Pneumatic)

9. Heat shield in EBT side

10. Copper stripes between upper and lower shell

11. Electrode changing and placing

12. Lumar Non-Shrouding and coke injection system

13. 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).