Ceramic Salt Bath Furnaces

How does a ceramic salt bath furnace work?

In an Upton ceramic salt bath furnace, only the faces of the submerged electrodes touch the salt, so the electrodes take up none of the bath space and leave it free of protruding obstructions. Heated salt rises while cooler salt falls toward the electrode area for reheating. A triple refractory wall is designed so salt penetrating the hardbrick liner solidifies within the intermediate castable layers. Electrodes and transformers can be air- or water-cooled, and listed uses include neutral hardening, austempering, marquenching, tempering, case hardening and dip brazing.

Submerged Electrode Placement

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Only the electrode faces touch the salt; the electrodes themselves take up none of the bath space.

Natural Convection

Heated salt rises in the bath while cooler salt falls toward the electrode area for reheating.

Engineered Triple Ceramic Refractory Wall Construction

The triple refractory wall is designed so the temperature gradient through the wall causes salt penetrating the hardbrick bath liner to solidify within the intermediate castable layers. This construction is designed to limit initial salt absorption into the walls.

Clear Working and Cleaning Area

The submerged-electrode design leaves the bath free of protruding obstructions for working and maintenance.

Upton Ceramic Salt Bath Furnace Designs

Upton ceramic salt bath furnaces are available with air- or water-cooled electrodes and transformers for ferrous and non-ferrous thermal processing.

Thermal Process Applications

Upton salt bath furnaces are used for various high temperature ferrous and non-ferrous thermal processing applications such as neutral hardening, austempering, marquenching, tempering, case hardening and dip brazing.