Indian Steel Mill Heat-Recovery + Energy Management — BEE PAT + worldsteel + IEA Steel 2050

An integrated 5 MTPA Indian steel plant can capture ~295 MW heat-recovery generation through CDQ + TRT + sinter cooler boiler + slag granulation + BOF gas + reheating recuperator at ₹1,660 Cr capex returning ₹820-900 Cr/yr saving. BEE PAT + worldsteel + IEA Steel 2050 + ISO 50001 govern. Three failures: greenfield without CDQ wasting ₹120-150 Cr/yr on 4 MTPA coke, BOF gas flared not captured wasting ₹235 Cr/yr, slag granulation without heat-recovery (slag at 1450°C wasted to open pit).

Indian steel mill heat-recovery framework

Indian integrated steel plants (SAIL Bhilai/Bokaro/Durgapur, Tata Steel Jamshedpur + Kalinganagar, JSW Vijayanagar + Salem, JSPL Raigarh, AM/NS Hazira, RINL Vizag) consume 5-7 GJ/t-crude-steel — among worlds highest. Heat-recovery + waste-heat utilisation per BEE PAT + ISO 50001 + worldsteel + IEA Steel Roadmap 2050 = critical for decarbonisation. CDQ (coke dry quenching) + TRT (top-pressure recovery turbine) + sinter waste heat + slag granulation + reheating furnace WHR = standard portfolio.

Integrated 5 MTPA steel plant heat-recovery scope

Three Indian steel mill heat-recovery failures

1. Greenfield without CDQ — wet quenching coke is 2-3 GJ/t-coke energy waste + ₹120-150 Cr/yr saving foregone on 4 MTPA coke plant vs CDQ. New Indian plants without CDQ violate ECBC 2024 + miss PAT Cycle savings. JSW + Tata installed; SAIL legacy plants still wet-quench.
2. BOF gas flared instead of captured — LD converter steel gas (15-20 MJ/Nm³) wasted via flare in older Indian plants = ₹235 Cr/yr saving foregone on 5 MTPA. Specify gas holder + power generation per IEA Steel Roadmap 2050.
3. Slag granulation water-cooling without heat-recovery — slag at 1450°C cooled in open pit + heat dissipated. Modern integrated plants recover via low-grade heat exchanger for DH + district cooling absorption chillers (where geography supports).