Indian Aluminium Smelter + Pot-Line MEP — Hall-Heroult + IAI + USEPA NESHAP LL + CPCB + BEE PAT

A 500,000 tpa Indian primary aluminium smelter demands ₹9,940 Cr MEP capex with 300 pot Hall-Heroult line at 350 kA + rectifier + anode bake + cast-house + dry-scrubber fluoride control + 1.6 GW captive power. IAI + USEPA NESHAP LL + CPCB + BEE PAT + EU CBAM govern. Indian 13.2-14.5 kWh/kg vs international 12.5 best. Three failures: captive power coal-only without 30 %+ RE facing EU CBAM 2026, fluoride emission 8-15 mg/Nm³ vs CPCB 2 limit, SPL stored on-site without TCLP test + secured TSDF.

Indian aluminium smelter pot-line framework

India aluminium (Vedanta + Hindalco + NALCO + BALCO) operates Hall-Heroult electrolysis pot-lines + carbon plant + casting. India ranks 2nd globally in primary aluminium. Standards stack — Hall-Heroult process + IEC 60296 (electrolyte) + worldcoal + USEPA NESHAP Subpart LL (Aluminium) + IAI International Aluminium Institute Best Practice + CPCB Aluminium Industry Norms 2022 + IS 437 (aluminium) + ASTM B-series + BEE PAT Aluminium Sector.

500,000 tpa aluminium smelter MEP scope

Three Indian aluminium smelter MEP failures

1. Captive power coal-only without RE — aluminium smelters consume 13-14 kWh/kg = 92-98 % of cost is electricity. Pure coal-fired captive faces carbon-pricing risk. Vedanta + Hindalco transitioning to RE PPA + green-aluminium premium. Indian smelters without 30 %+ RE face EU CBAM penalty 2026.
2. Fluoride emission > 2 mg/Nm³ — Hall-Heroult HF emission to atmosphere damages vegetation + livestock + workers. CPCB 2022 + USEPA NESHAP LL cap at 2 mg/Nm³ + 0.5 kg/t-Al. Indian legacy pot-lines emit 8-15 mg/Nm³ — fails NESHAP + faces community litigation.
3. SPL (Spent Pot Lining) hazardous-waste TSDF without leachate test — SPL contains cyanide + fluoride + leaches to groundwater. HW Rules 2016 mandate TCLP (Toxicity Characteristic Leaching Procedure) test + secured landfill. Indian smelters often store on-site indefinitely.