Indian Electric Arc Furnace (EAF) + Ladle Furnace + Caster MEP — worldsteel + USEPA + IEC 61000
A 1 MTPA Indian EAF mini-mill demands ₹1,827 Cr MEP capex with DRI plant + 120 t × 5 tap/day EAF + LF + caster + ESP/bag-house + SVC/STATCOM harmonic filter + closed-loop cooling. worldsteel + USEPA NESHAP YYYYY + IEA Steel 2050 + CPCB + IEC 61000 govern. Three failures: no SVC/STATCOM compensation (Pst > 4 violates IEC 61000-3-7), off-gas dust capture cyclone-only without bag-house + carbon-injection, water-cooling chemistry un-dosed causing panel failure in 6-12 months.
Indian Electric Arc Furnace steel framework
India EAF + secondary steel (JSW + JSPL + Tata Steel BSL + Welspun + Jindal Stainless + Arcelor + MS GHL + Bhushan) uses Direct Reduction (DRI) + EAF for flexible production. Standards stack — worldsteel EAF Operations Guide 2024 + IEA Steel Roadmap 2050 + USEPA NESHAP Subpart YYYYY (Steel) + AISI + BIS IS 2062 + IEEE Std 80 (substation earthing) + IEC 61000 (arc-furnace harmonics) + NFPA 70 Art 470 (Industrial Heat Generating). EAF can operate green if powered by RE — 60-70 % less CO2 than blast-furnace route.
EAF + ladle furnace + caster MEP scope — 1 MTPA mini-mill
| Component | Function | Capacity | Capex (₹ Cr) |
|---|---|---|---|
| DRI plant (sponge iron) | iron-ore reduction | 1 MTPA | 385 |
| EAF (electric arc furnace) | steel-making | 120 t heat × 5 tap/day | 485 |
| LF (ladle furnace) | secondary refining | 120 t | 85 |
| VOD/RH vacuum degasser (optional) | low-C alloy steels | — | 45 |
| Caster (continuous billet/slab) | — | — | 220 |
| Dust collection + ESP (EAF + LF off-gas) | PM < 30 mg/Nm³ | CPCB Steel + USEPA | 125 |
| Cooling water (closed + open) | 12,000 m³/hr | — | 62 |
| Compressed air + utility | — | — | 25 |
| Power supply (high-power 250 MVA furnace transformer) | EHV / 33 kV / arc-furnace | — | 220 |
| Harmonic + reactive filter (SVC/STATCOM) | flicker mitigation | IEC 61000-3 | 85 |
| Scrap handling + magnetic separator | — | — | 55 |
| Slag handling + granulation | — | — | 35 |
| Total EAF mini-mill MEP | — | — | 1,827 |
Three Indian EAF MEP failures
- No harmonic + flicker compensation — EAF arc creates 50-100 MVA fluctuating load + harmonic spectrum 2nd-23rd order. Without SVC/STATCOM compensation, grid Pst > 4 violates IEC 61000-3-7 + state DISCOM penalty + community light flicker complaint.
- Off-gas dust + AC capture under-spec — EAF off-gas at 1500-1700°C carries Zn + Pb + Cd from scrap + furnace dust. USEPA NESHAP + CPCB require PM < 30 mg/Nm³ + Hg/dioxin control. Cyclone-only inadequate; need bag-house + activated-carbon injection.
- Water-cooling closed-loop chemistry ignored — EAF panel + roof cooling water at 35-45°C circulates 12,000 m³/hr. Without dosing + biocide + corrosion-inhibitor, panel failure in 6-12 months. Specify dosing + cooling-tower management per Cooling Technology Institute STD-201.
- worldsteel EAF Operations Guide 2024 + Sustainability Indicators.
- IEA Iron + Steel Technology Roadmap 2050.
- USEPA 40 CFR Part 63 Subpart YYYYY — National Emission Standards for Hazardous Air Pollutants for Area Sources: Electric Arc Furnace Steelmaking Facilities.
- CPCB Steel Industry Emission Norms 2022.
- IEEE Std 80 + 519 + IEC 61000-3-6 + 3-7 — Power Quality + Earthing.
- NFPA 70 Article 470 — Industrial Heat-Generating Equipment.
- IS 2062:2011 + AISI 1018+ — Steel Grade Standards.
- CTI Cooling Technology Institute STD-201 — Cooling Tower Performance.