Case Studies · Iron & Steel

Structural Steel High Emissivity Coating: Shaft Furnace Support Stops Warping at Minerva

Shaft furnace steel support structure·Minerva, Ohio, USA

The steel support structure of a shaft furnace in Minerva, Ohio was warping and sagging from exhaust flame impingement, and the production layout made redesign impractical. After grit-blasting to bare metal, the structure was coated with Emisshield M-2. It has remained in service without sagging or deformation.

Talk with an Expert Case Study Library

Service-life extension
: No warping at ~982°C
: No structural redesign

The Challenge

Flame impingement from the exhaust was overheating the support steel; the plant needed a coating that would absorb the excess heat and re-radiate it away from the metal.

What Was Applied

Grit-blast to bare metal, then Emisshield M-2. Operating at around 982°C, the coating absorbs radiant energy and re-radiates it into the plant atmosphere.

Why It Worked

A high emissivity surface sheds absorbed energy as radiation instead of storing it as metal temperature, keeping the steel below the point where it loses strength. See How Emissivity Works.

Summary of Results

Metric	Before	After
Structural deformation	Warping, sagging	None; remains in service
Design changes	Redesign impractical	None required
Downtime	Threatened	Avoided

Plant personnel report the coating continues to perform in the furnace's extreme conditions.

Next step

Operating the Same Asset?

Steel losing strength near flame or exhaust? Send us the geometry and temperatures. We project the result from comparable documented installations.

Talk with an Expert Request a Quote