SIJ Acroni Jesenice steel plant

SIJ Acroni Jesenice steel plant is a steel plant in Slovenia. Its listed capacity is 726,000 t of steel. Steel plants burn coal in blast furnaces or use electric arcs to melt scrap; in both cases the molten metal must be kept above 1,500°C and transferred through extensive hot piping and vessels. It is operated by SIJ Acroni doo. It emits about 92,001 t CO₂e a year from Climate TRACE, roughly comparable to the annual emissions of 21k passenger cars. Its CO₂ per unit of capacity is 86% below the national median for this sector.

Facility data: Climate TRACE v6 (asset-level capacity & CO₂e, CC BY 4.0), id ct-1567050.

In context: how this facility compares

At 726,000 t of steel, SIJ Acroni Jesenice steel plant is around the median steel plant in Slovenia (726,000 t of steel). Subsector: iron-and-steel. As steel plant, it requires high process heat (typically 800–1500°C) for its core industrial operations — heat that must be supplied by boilers, furnaces or direct combustion, and losses through uninsulated vessels and piping represent wasted fuel. Removable modular insulation can cut those losses by 80–96%, surface-cooling equipment to ≤45°C, with payback often under 2 years. Steel plants burn coal in blast furnaces or use electric arcs to melt scrap; in both cases the molten metal must be kept above 1,500°C and transferred through extensive hot piping and vessels.

Capacity & CO₂-intensity comparison computed from Climate TRACE industrial facilities data; sector role based on engineering reference.

What 92,001 t CO₂e a year looks like

This facility's estimated annual CO₂e (Climate TRACE, modelled) in everyday equivalents from the US EPA Greenhouse Gas Equivalencies calculator:

Equivalencies: US EPA Greenhouse Gas Equivalencies. Emissions: Climate TRACE.

Operator

Operated by SIJ Acroni doo.

Local climate

SIJ Acroni Jesenice steel plant sits in a temperate oceanic climate zone (Köppen Cfb), at 46.4°N in the northern hemisphere.

Köppen zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid).

Site climate & environmental severity

The local climate sets how fast unprotected steel, protective coatings and the insulation on hot process equipment degrade at this site. It sits in a moderately corrosive environment (estimated ISO 9223 class C3 — Medium), with humidity / wetness the leading environmental stress.

In this site’s local climate, a bare 150 °C surface sheds about 1445 W/m² to ambient — roughly 1.11× the loss at a 20 °C reference; removable insulation recovers about 1373 W/m² of that. Reference-surface calculation at a 150 °C surface from WorldClim climate normals (ASTM C680 / ISO 12241) — an indicative per-climate comparison, not a measurement of this site’s specific equipment. Open method dataset: DOI 10.5281/zenodo.20787408 (CC BY 4.0).

Higher environmental severity is exactly where protective removable insulation pays back most: a sheltered micro-climate slows corrosion, UV and thermal-cycling damage and extends outdoor hardware service life. This is an indicative site-climate context — not a condition assessment of any specific plant or operator.

Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.

How it compares & nearby sites

Nearby industrial sites

• Deskle Cement Plant · Cement Plant · 379,011 t CO₂
• Wietersdorf Cement Plant · Cement Plant · 165,380 t CO₂
• Berini Lime Kilns · Lime Plant
• Trbovlje Cement Plant · Cement Plant · 200,363 t CO₂
• Danieli ABS Pozzuolo del Friuli steel plant · Steel Plant · 54,909 t CO₂
• Pittini Ferriere Nord Osoppo steel plant · Steel Plant · 109,818 t CO₂

Location

Coordinates 46.42237, 14.09683. View on OpenStreetMap.

Heat loss & insulation profile

For a steel plant, the main modular-insulation targets are reheat & annealing furnaces, ladles, hot-blast stoves, steam & gas ducting. Typical hot-surface ranges used for screening: 200–1,200 °C.

Indicative recoverable energy

A first-pass insulation screen suggests about 3,600 MWh/year of recoverable heat-loss reduction and about 1,200 t CO₂e/year of avoided emissions. Screening estimate scaled from installed process-heat projects and surface-temperature reduction data.

See Inzonex Modular Insulation → Run the calculator →

Screening calculation from facility class, capacity and open emissions/energy context. Engineering survey required before procurement.

Safety & the no-regret first step

Start with a thermal survey of valves, flanges, doors and bends. Removable modular insulation keeps maintenance access open while lowering exposed-surface temperature and wasted heat.

EU policy pressure on this sector

Obligation

This facility is inside the EU. For thermal equipment, insulation upgrades can support ETS exposure reduction and energy-efficiency compliance.

Sources: EU ETS, CBAM and national energy-efficiency schemes.

Frequently asked questions