Manufacturing
September 11 2026
How to Set Up a Green Steel Manufacturing Plant in India: Technology, Energy, Cost, and Project Requirements
Introduction
For steel manufacturers, energy developers, and project sponsors evaluating a green steel manufacturing plant in India in 2026, disciplined integration across production route selection, raw materials, green hydrogen and renewable electricity supply, plant capacity, carbon intensity targets, and regulatory framework determines commercial viability.
India's Green Steel Taxonomy, released by the Ministry of Steel on 12 December 2024 and subsequently notified in the Gazette of India, defines green-rated steel as steel produced with an emission intensity below 2.2 t-CO₂e per tonne of finished steel, with three-, four- and five-star ratings based on progressively lower emission intensity. India's broader steel-decarbonization framework also includes initiatives under the National Green Hydrogen Mission.
Scope of this Guide
This guide answers the sponsor's question directly. How can manufacturers plan a commercially viable green steel plant in India based on production route, raw-material availability, green hydrogen and renewable-energy requirements, plant capacity, carbon intensity, and project economics? It walks through the three main routes, green hydrogen integration, iron ore quality requirements, plant systems and utilities, Green Steel Taxonomy compliance for 3–5-star ratings, and investment brackets anchored to explicit technology and capacity assumptions.
Table of Contents
- Introduction
- Why Green Steel Manufacturing Matters for India in 2026
- What Green Steel is and Why It Matters in India
- Production Route Selection and Technology Comparison for Green Steel Manufacturing in India
- Green Hydrogen and Renewable Electricity Integration for Green Steel Plants in India
- Raw Material Sourcing and Iron Ore Quality for Green Steel Manufacturing in India
- Plant Systems Utilities and Infrastructure for Green Steel Plants in India
- Carbon Intensity Emissions and Green Steel Taxonomy Compliance in India
- Capital Investment and Project Economics for Green Steel Manufacturing in India
- Conclusion
1. Why Green Steel Manufacturing Matters for India in 2026
Four drivers make disciplined green steel plant setup a critical priority for Indian steel manufacturers in 2026.
1.1 Policy Framework Established
India's green steel manufacturing in India framework has become concrete in 2024-2026. India's Green Steel Taxonomy, released by the Ministry of Steel on 12 December 2024 and notified in the e-Gazette on 23 December 2024, made India the first country to release a national taxonomy for green steel. Green Steel Public Procurement Policy (GSPPP) under stakeholder consultation. Combined with National Green Hydrogen Mission (INR 19,744 crore), SIGHT programme incentives, and Carbon Credit Trading Scheme, a supportive framework is now operational for pioneering projects.
1.2 Global Market Access
EU Carbon Border Adjustment Mechanism (CBAM) definitive phase from January 2026 affecting Indian steel exports creates commercial imperative for lower carbon intensity products. Global procurement policies (public and private) increasingly requiring green steel credentials. Automotive OEMs, wind energy manufacturers, and construction industry customers increasingly specify low-carbon steel. Steel plants with 3–5-star Green Steel certification can access premium markets while conventional producers face carbon costs and market access constraints. Early movers capture positioning advantages before broader industry transition.
1.3 Steel Sector Decarbonization Imperative
India's steel sector accounts for approximately 12 percent of the country's CO₂ emissions, making steel decarbonization an important part of India's long-term net-zero transition. India's Green Steel Taxonomy establishes 2.2 t-CO₂e per tonne of finished steel as the upper emission-intensity threshold for steel to qualify for a green rating.
For manufacturers targeting green certification, production-route selection, energy efficiency, renewable electricity, lower-carbon reductants and emerging technologies such as green hydrogen and carbon capture will therefore need to be evaluated at the project level. The Ministry of Steel is also supporting pilot projects under the National Green Hydrogen Mission to build technical and operational experience with hydrogen-based steelmaking technologies before wider commercial deployment.
1.4 Financial Support Available
Multiple support mechanisms available for green steel projects. SIGHT Component II provides green hydrogen production incentive under INR 13,050 crore outlay. SIGHT Component I provides electrolyser manufacturing PLI (INR 4,440 crore for 15 GW capacity). PLI Specialty Steel Scheme (INR 6,322 crore) offers 4-12 percent incentive on incremental production for eligible grades. Carbon credits through CCTS mechanism where methodology approved. State-level renewable electricity policies offering competitive tariffs and open access. These schemes reward well-planned projects but do not compensate for weak feasibility.
2. What Green Steel is and Why It Matters in India
Understanding what green steel is and why it matters in India begins with India's Green Steel Taxonomy - the world's first official framework for defining and certifying green steel.
2.1 Green Steel Definition
Under India's Green Steel Taxonomy launched by Ministry of Steel on 12 December 2024 at Vigyan Bhavan, New Delhi, green steel production in India is defined as steel with emissions intensity below 2.2 tonnes CO2 equivalent per tonne finished steel (t-CO2e/tfs). Steel above this threshold does not qualify for green rating. Emissions scope covers Scope 1 (direct operations), Scope 2 (indirect energy), and limited Scope 3 (agglomeration including sintering, pellet making, coke making; beneficiation; embodied emissions of raw materials) up to finished steel production. Upstream mining and downstream/transportation emissions are excluded.
2.2 Star Rating System
| Star Rating | Emission Intensity Range | Interpretation |
|---|---|---|
| 5-Star | <1.6 t-CO2e/tfs | Highest green rating |
| 4-Star | 1.6 to 2.0 t-CO2e/tfs | High green rating |
| 3-Star | 2.0 to 2.2 t-CO2e/tfs | Threshold green rating |
| Not Rated | Above 2.2 t-CO2e/tfs | Not eligible for green rating |
Star rating thresholds reviewed every 3 years to reflect advancing decarbonization technology. National Institute of Secondary Steel Technology (NISST) serves as nodal agency for measurement, reporting, verification (MRV) and issuing green certificates. AM/NS India became the first integrated steel producer to receive Green Steel Certification with 4-star rating for Hot Rolled Coils and 3-star for Heavy Plates and Cold Rolled Coils, demonstrating framework operationalization.
2.3 Green Steel vs Conventional Steel
Conventional BF-BOF integrated steel plants typically emit 2.2-2.6 t-CO2/tcs, at or above green rating threshold. Coal-based DRI with EAF: 2.7-3.1 t-CO2/tcs. Natural gas-based DRI with EAF: 1.4-1.6 t-CO2/tcs, potentially eligible for 3-4 star. Green hydrogen-based DRI with renewable EAF: 0.5-1.5 t-CO2/tcs, potentially 4-5 star. Scrap-based EAF with renewable electricity: 0.55-0.65 t-CO2/tcs, potentially 5-star. Actual intensity depends on specific project configuration.
3. Production Route Selection and Technology Comparison for Green Steel Manufacturing in India
Understanding production route selection and technology comparison for green steel manufacturing in India is the single most consequential technology decision. The three main routes have fundamentally different feedstock, energy, and capital requirements.
3.1 Process Technology Selection Framework
- Process technology selection should follow raw material availability, energy access, capacity requirement, and target star rating
- Iron ore vs scrap availability in catchment - determines primary vs secondary steelmaking
- Green hydrogen availability and cost - determines H2-DRI viability
- Renewable electricity access - affects all electric routes
- Product mix requirement - affects quality control and refining needs
- Target star rating - influences technology stringency and capital
- Technology maturity - proven vs emerging routes affect execution risk
3.2 Three Main Green Steel Routes
| Route | Description | Typical Intensity (t-CO2/tcs) |
|---|---|---|
| Scrap-EAF (RE) | Steel scrap melted in EAF with renewable electricity | 0.55-0.65 |
| H2-DRI-EAF | Iron ore reduced with green hydrogen, EAF melting | 0.5-1.5 |
| NG-DRI-EAF | Natural gas DRI, transitioning to green H2 | 1.4-1.6 |
| BF-BOF + CCUS | Conventional route with carbon capture | 2.2-2.6 |
| Coal-DRI-EAF | Conventional coal DRI (baseline) | 2.7-3.1 |
3.3 Hydrogen-Based DRI-EAF Route
Hydrogen-based steel manufacturing through DRI-EAF is one of the major technology pathways being evaluated for deep decarbonization of primary steel production. In this route, green hydrogen is used as the reducing gas to convert suitable iron ore pellets into direct reduced iron (DRI) in a shaft furnace, substantially reducing reliance on fossil-based reductants. The resulting DRI is then melted in an electric arc furnace (EAF), where the use of renewable electricity can further reduce the carbon intensity of steel production.
The Ministry of Steel is supporting pilot projects under the National Green Hydrogen Mission to build technical and operational experience with hydrogen use in iron and steelmaking. For project developers, the feasibility of H₂-DRI-EAF depends on factors such as suitable iron ore and pellet quality, green hydrogen availability and cost, renewable electricity supply, technology maturity, plant capacity, and the required carbon-intensity target.
3.4 Scrap-Based EAF Route
Scrap-based steelmaking through EAF is the lowest-carbon route where quality scrap is available. Scrap (typically 1.05-1.1 tonnes per tonne steel) is melted in EAF powered by renewable electricity. Emission intensity 0.3-0.8 t-CO2/tfs supports 5-star rating. However, scrap availability constraint (India's scrap ecosystem still developing) limits this route to smaller/mid-scale plants. Scrap quality affects product grade - premium applications may require pig iron/HBI addition for tramp element control. Scrap-EAF plants are less capital-intensive than integrated routes making them viable for regional players.
3.5 BF-BOF Decarbonization
Existing BF-BOF plants can evaluate several decarbonization measures, including greater renewable-energy use, energy-efficiency improvements, hydrogen injection or substitution where technically feasible, biochar or alternative reductants, top-gas recycling, and CCUS. The achievable emissions reduction depends on the baseline plant configuration, substitution level, energy source, capture rate and system boundary; the resulting carbon intensity should therefore be calculated for the specific retrofit rather than assigned a universal star rating.
Advantages include leveraging existing capital and workforce. Challenges include hydrogen infrastructure integration, CCUS scale-up costs, and limited emission reduction potential versus greenfield green routes. Suitable for major producers with existing integrated plants managing transition rather than greenfield green projects.
4. Green Hydrogen and Renewable Electricity Integration for Green Steel Plants in India
Green hydrogen and renewable electricity form the core energy inputs for H₂-DRI-EAF steelmaking, directly influencing both carbon intensity and project economics.
The following values are indicative planning ranges for H₂-DRI-EAF configurations rather than universal green-steel design requirements. Actual hydrogen consumption, electrolyzer capacity, electricity demand, storage requirements, and plant power load should be established through project-specific material and energy balances, considering ore quality, metallization, hydrogen utilization, electrolyzer efficiency, EAF configuration, plant capacity, operating strategy, and renewable-power supply.
4.1 Green Hydrogen Requirement
- Green hydrogen requirement for H2-DRI approximately 50-80 kg H2 per tonne DRI produced
- Hydrogen requirement translates to 70-110 kg H2 per tonne of steel (accounting for DRI-steel conversion)
- 1 MTPA H2-DRI-EAF plant requires 70,000-110,000 tonnes green hydrogen annually
- Indian Green Hydrogen Standard (MNRE Aug 2023) defines threshold: 2 kg CO2e per kg H2 (12-month average)
- H2 purity typically 99.9 percent+ for DRI applications
- Storage buffer for 24-72 hours production supporting operational continuity
4.2 Renewable Electricity Requirement
- Renewable electricity requirement for green steel plant depends on route
- Energy requirement covers EAF melting (500-700 kWh/tonne steel) plus DRI heating (150-250 kWh/tonne DRI) plus utilities
- H2-DRI-EAF plant total electricity: 4,000-6,000 kWh per tonne steel (including hydrogen production)
- Scrap-based EAF plant total electricity: 550-800 kWh per tonne steel
- Typical 1 MTPA H2-DRI-EAF plant requires 500-750 MW peak power (mix of hydrogen production and steelmaking)
- Renewable Purchase Obligation (RPO) targets and Green Open Access Rules support renewable electricity procurement
4.3 Hydrogen Production and Electrolyzer Integration
- Electrolyzer integration through PEM (Proton Exchange Membrane) or alkaline technology
- Water requirement approximately 9 kg per kg green hydrogen (plus cooling water)
- Electrolyzer sizing typically 300-600 MW for 1 MTPA H2-DRI-EAF plant
- SIGHT Component I provides electrolyser manufacturing PLI up to INR 4,440 crore for 15 GW
- Onsite production offers control; supply contracts offer capital efficiency
- Hybrid strategy - onsite baseline + supply agreements for peaks - increasingly common
4.4 Financial Support and SIGHT Programme
National Green Hydrogen Mission (Cabinet approved 4 January 2023, INR 19,744 crore outlay for FY24-30) provides comprehensive support. SIGHT (Strategic Interventions for Green Hydrogen Transition) with INR 17,490 crore covers electrolyser manufacturing PLI (Component I - INR 4,440 crore for 15 GW capacity) and green hydrogen production incentive (Component II - INR 13,050 crore with INR 50 per kg over 3 years). Solar Energy Corporation of India (SECI) is implementing agency. Steel is designated priority sector for pilot allocation. Green H2 currently costs USD 5-6 per kg vs grey hydrogen at USD 1.5-2 per kg - cost parity target through scale and technology cost reduction is central to project economics.
5. Raw Material Sourcing and Iron Ore Quality for Green Steel Manufacturing in India
Raw material sourcing and quality requirements vary significantly across green steel production routes and directly influence process performance, equipment selection, and project economics.
The specifications and material-balance values below are indicative planning ranges rather than universal requirements. Actual iron ore and pellet specifications, scrap requirements, hydrogen consumption, metallic yield, and feedstock quantities should be established based on the selected DRI/EAF technology, equipment supplier requirements, targeted steel grades, feedstock characteristics, and project-specific material balance.
5.1 Iron Ore Quality Requirements
- Iron ore quality for H2-DRI requires high-grade pellets (typically 65-67 percent Fe, low gangue)
- Pellet feed (concentrate) beneficiation to DR-grade specifications
- Low silica (<3 percent), low alumina (<2 percent), low phosphorus (<0.08 percent), low sulphur
- Physical properties: 6-16 mm size, compression strength >180 kg/pellet, tumble index >92 percent
- Indian iron ore averages 62-64 percent Fe requiring beneficiation for DR-grade quality
- DR-grade pellet supply constraint requires import or captive beneficiation investment
5.2 Scrap and Alternative Feedstock
- Steel scrap (heavy melt, shredded, bundles) quality directly determines EAF product quality
- Indian scrap ecosystem developing - National Steel Scrap Recycling Policy 2019 supports formalization
- Import scrap available but supply/price volatility affects project economics
- Hot Briquetted Iron (HBI) as alternative to scrap for tramp element control
- Pig iron addition for grade quality management
5.3 Raw Material Sourcing Strategy
- Raw material sourcing strategy through captive mines, long-term contracts, or spot procurement
- Iron ore linkage from Odisha, Jharkhand, Chhattisgarh, Karnataka mines
- Pellet supply through captive plants or long-term contracts with pellet manufacturers
- Scrap sourcing through domestic aggregation and imports
- Fluxes (limestone, dolomite) and alloying elements sourcing
- Location decisions balancing raw material proximity vs energy/logistics access
5.4 Material Balance and Yield
Material balance for an H₂-DRI-EAF project should be developed from the selected pellet chemistry, metallization target, DRI yield, hydrogen utilization, scrap or HBI addition, slag practice, alloy requirements and liquid-steel yield. Scrap-EAF projects similarly require a charge balance based on scrap grades, metallic yield, tramp-element limits and the targeted steel product. These balances should be established during feasibility and process design rather than applying a universal feedstock-to-steel conversion ratio.
6. Plant Systems Utilities and Infrastructure for Green Steel Plants in India
Understanding plant systems utilities and infrastructure for green steel plants in India covers enabling systems supporting steelmaking operations. Utility investment 15-25 percent of plant CAPEX.
6.1 Major Plant Systems
- DRI shaft furnace (H2-DRI route) or scrap yard and preheating (scrap route)
- Electric Arc Furnace (EAF) - primary steelmaking with electrical energy
- Ladle Metallurgy Furnace (LMF) for secondary refining
- Vacuum Degassing (VD) for clean steel grades
- Continuous Casting Machine (CCM) for slab/bloom/billet casting
- Rolling mill (hot strip, plate, section, or wire rod depending on product)
- Finishing lines (pickling, cold rolling, annealing, galvanizing per product)
6.2 Process Utilities
- Process utilities sized for steelmaking operations
- Oxygen supply for EAF operations - typically 50-80 Nm³ per tonne steel from ASU or contract
- Water requirement covers process cooling, EAF cooling, and green hydrogen electrolysis (9 kg per kg H2)
- Compressed air, nitrogen, argon for various process operations
- Natural gas for reheating furnaces and secondary processes
- Refractory management for EAF, ladles, tundish (major consumable)
- Slag handling and processing for granulation or aggregates
6.3 Electrical Infrastructure
- EAF electrical rating 60-90 MVA per 100 tonnes tap (major single load)
- Transformer capacity and switchgear supporting EAF operation and grid stability
- Power quality management (harmonics, flicker) for EAF fluctuating load
- Static VAR Compensator (SVC) or STATCOM for reactive power management
- Grid interconnection with renewable electricity source and utility
- Emergency backup power for critical systems
6.4 Plant Layout and Infrastructure
Plant layout design should support material flow from raw material yard through DRI/scrap preparation, EAF, secondary refining, casting, rolling, and finishing to warehouse and dispatch. Layout must accommodate large equipment footprints, heavy material handling (overhead cranes, transfer cars), utility routing, and personnel/vehicle circulation. Environmental infrastructure (dust collection, water treatment, slag handling) integrated from design stage.
Site selection should consider sufficient land for the selected steelmaking route, raw-material storage, hydrogen and renewable-energy infrastructure where applicable, utilities, environmental systems, internal logistics and future expansion. Land requirement should be established through the project-specific plant layout rather than a universal acreage benchmark.
7. Carbon Intensity Emissions and Green Steel Taxonomy Compliance in India
Carbon intensity assessment and compliance with India's Green Steel Taxonomy determine whether steel qualifies for green certification and the applicable star rating. Certification provides a framework for validating the emissions intensity of finished steel against the taxonomy's defined thresholds.
7.1 Emission Calculation Methodology
- Emissions intensity calculated per Green Steel Taxonomy methodology with Scope 1, Scope 2, and limited Scope 3
- Carbon emissions tracking through direct measurement, activity data, and emission factors
- Scope 1: direct emissions from steelmaking (fuel combustion, process emissions)
- Scope 2: indirect emissions from purchased electricity, steam, heat
- Limited Scope 3: sintering, pellet making, coke making, beneficiation, embodied emissions
- Excludes upstream mining, downstream/transportation emissions per taxonomy
7.2 Emission Sources by Route
| Route | Primary Emission Sources | Scope 3 Considerations |
|---|---|---|
| H2-DRI-EAF | EAF, DRI heating, ancillary | Pellet-making emissions |
| Scrap-EAF | EAF, ancillary, electrode consumption | Minimal upstream |
| NG-DRI-EAF | Natural gas DRI reduction, EAF | Pellet-making, NG supply |
| BF-BOF + CCUS | Coke/coal, BF, BOF (net of captured) | Coke making major |
7.3 NISST Certification Process
- National Institute of Secondary Steel Technology (NISST) - designated nodal agency
- MRV (Measurement, Reporting, Verification) protocols for emission quantification
- Application, data submission, and third-party verification
- Green certificate issuance with star rating (3, 4, or 5 star)
- Periodic recertification maintaining rating validity
- AM/NS India demonstrated framework with 4-star HRC and 3-star plates/CRC certification
7.4 Compliance Strategy
Green Steel Taxonomy compliance strategy addresses full emission scope in plant design and operations. Route selection primarily determines intensity range (scrap-EAF 5-star potential, H2-DRI-EAF 4-5-star, natural gas DRI-EAF 3–4-star, BF-BOF-CCUS 3 star). Green hydrogen source (self-produced with RE electricity vs procured) affects Scope 2 emissions.
Renewable electricity percentage in EAF supply directly affects intensity. Iron ore quality reduces beneficiation embodied emissions. Scope 3 emission management through supplier engagement. Threshold reviewed every 3 years - future tightening should be anticipated in project design. Star rating targeting should follow market strategy and premium pricing capture.
8. Capital Investment and Project Economics for Green Steel Manufacturing in India
Capital investment and project economics for green steel manufacturing in India vary significantly by technology route, plant capacity, level of integration, and energy strategy.
The following investment ranges are indicative planning benchmarks based on the stated capacity and technology configurations. Actual green steel plant investment can vary materially with product mix, technology supplier, level of integration, hydrogen-production strategy, renewable-power infrastructure, rolling and finishing scope, land and site conditions, localization, financing structure, and project location.
8.1 Capital Investment by Route and Scale
| Configuration | Scale Assumption | Investment (INR) |
|---|---|---|
| Small scrap-EAF | 0.5 MTPA, standalone EAF | 500-2,000 crore |
| Large scrap-EAF | 2+ MTPA, integrated finishing | 2,000-8,000 crore |
| H2-DRI-EAF pilot | 0.3-0.5 MTPA, integrated H2 | 3,000-10,000 crore |
| H2-DRI-EAF commercial | 1+ MTPA, full integration | 10,000-40,000 crore |
| BF-BOF + CCUS retrofit | Existing plant retrofit | 3,000-15,000 crore |
8.2 CAPEX Composition
- CAPEX and OPEX composition varies with technology route
- Steelmaking equipment (EAF, DRI shaft, LMF, CCM): 30-40 percent of CAPEX
- Green hydrogen infrastructure (electrolyzer, storage): 15-25 percent (H2-DRI route)
- Renewable electricity connection/infrastructure: 5-15 percent
- Rolling mill and finishing lines: 15-25 percent
- Utilities, environmental, buildings, land development: 10-15 percent
- Engineering, project management, contingency: 8-12 percent
8.3 OPEX Drivers and Cost Parity
- Raw materials (ore/pellet/scrap, fluxes): 40-55 percent of OPEX
- Energy (electricity, hydrogen, natural gas): 25-35 percent
- Refractories, electrodes, consumables: 8-12 percent
- Manpower, maintenance, overheads: 8-15 percent
- Current green H2 cost USD 5-6/kg vs grey USD 1.5-2/kg creates USD 200-350/tonne steel premium
- Cost parity requires H2 cost reduction to USD 2-3/kg or carbon pricing internalizing emissions
8.4 Project Feasibility and Commissioning
Project feasibility integrating technical, financial, and regulatory dimensions is essential before major commitment. Project execution and commissioning for green steel manufacturing in India covers civil, mechanical, electrical completion, cold trials, hot trials, first metal, ramp-up, and commercial production. Total project duration typically 24-48 months for greenfield green steel plants depending on scale and route. Well-planned projects achieve 80-90 percent capacity utilization within 12-18 months of commissioning.
Conclusion
Setting up a green steel manufacturing plant in India in 2026 requires route selection across hydrogen-based DRI-EAF, scrap-based EAF, transitional natural gas DRI-EAF, and BF-BOF decarbonization; securing suitable iron ore or scrap; integrating green hydrogen and renewable electricity; designing core plant systems and utilities; meeting Green Steel Taxonomy requirements; accessing applicable SIGHT incentives; planning route- and scale-based capital investment; and coordinating integrated commissioning over an indicative 24–48 months.
Three priorities should guide sponsors: technology route drives project requirements; Green Steel Taxonomy compliance should be incorporated from the feasibility stage; and green hydrogen and renewable-electricity availability and costs are central to project timing and economics.
PURSUING GREEN STEEL MANUFACTURING?
IMARC Engineering's green steel plant development advisory team supports steel manufacturers, energy developers, and project sponsors with route selection across hydrogen-based DRI-EAF, scrap-based EAF, transitional natural gas DRI-EAF, and BF-BOF decarbonization; iron ore and scrap sourcing; green hydrogen and electrolyzer integration; renewable electricity through Green Open Access, PPAs, or captive generation; plant systems and utilities; Green Steel Taxonomy and NISST MRV compliance; SIGHT and other applicable incentive strategies; route- and scale-based capital investment planning; and integrated commissioning of civil, mechanical, electrical, hydrogen, and renewable-energy systems for compliant commercial production and Green Steel certification.
→ Schedule a free green steel project scoping consultation with an IMARC specialist
Frequently Asked Questions
Green steel per India's Green Steel Taxonomy (12 December 2024) is steel with emission intensity below 2.2 t-CO2e per tonne finished steel. Manufacturing routes include hydrogen-based DRI-EAF, scrap-based EAF with renewable electricity, and BF-BOF decarbonization through CCUS. Star ratings: 5-star <1.6; 4-star 1.6-2.0; 3-star 2.0-2.2.
Green steel manufacturing plant in India setup involves production route selection (H2-DRI-EAF, scrap-EAF, or BF-BOF decarbonization), raw material assessment, green hydrogen and renewable electricity integration, plant capacity sizing, utilities design, environmental clearance, and commissioning coordinated across 24-48 months depending on scale and technology maturity.
Green steel production technology routes include hydrogen-based DRI-EAF (natural gas DRI transitioning to hydrogen), scrap-based EAF with renewable electricity, and decarbonized BF-BOF through CCUS or hydrogen blending. Emerging routes include hydrogen plasma smelting. Selection depends on raw material availability, hydrogen access, and target star rating.
Green hydrogen replaces coke as reductant in Direct Reduced Iron (DRI) process, producing water instead of CO2. Renewable electricity powers the Electric Arc Furnace (EAF) for melting DRI/scrap into steel. Combined H2-DRI-EAF with renewable electricity delivers lowest carbon intensity, targeting 5-star rating below 1.6 t-CO2e/tfs.
Green steel raw materials depend on production route. H2-DRI-EAF requires high-grade iron ore pellets (65%+ Fe), green hydrogen (50-80 kg/tonne DRI), and steel scrap for EAF blending. Scrap-based EAF requires 1.05-1.1 tonnes clean scrap per tonne steel. Both routes need renewable electricity and fluxes.
Green steel plant cost in India varies significantly with technology and scale. Small scrap-based EAF (0.5 MTPA) INR 500-2,000 crore. Large scrap-EAF (2+ MTPA) INR 2,000-8,000 crore. Hydrogen-based DRI-EAF pilot (0.3-0.5 MTPA) INR 3,000-10,000 crore. Commercial H2-DRI-EAF (1+ MTPA integrated) INR 10,000-40,000 crore excluding land.
Green steel infrastructure requires green hydrogen production/storage or supply, renewable electricity (500-1,500 MW for 1 MTPA H2-DRI-EAF), oxygen supply, high-purity water (9 kg per kg H2), industrial gases, process cooling, and grid integration. Iron ore pellet handling for DRI or scrap yard for EAF.
Green steel project economics depend on green hydrogen cost (USD 5-6/kg vs USD 1.5-2 for grey), renewable electricity tariff, iron ore/scrap availability, plant utilization, and carbon pricing. Carbon intensity determined by hydrogen source, electricity mix, iron ore grade, and scrap fraction, targeting sub-2.2 t-CO2e/tfs threshold.
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