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Old 07-06-2018, 01:03 PM
Eric Trulson Eric Trulson is offline
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Tank liner material?

Looking around at the different materials available to use as a furnace tank liner. Anybody have a particular material they like that is currently on the market?

Context: a glassblower who runs a small press-glass operation needs to re-line his furnace and approached me for help. I have never run or built a tank furnace before, so my knowledge is all theoretical, not practical. His furnace is small (the tank is only about 18" x 13" x 9"), which makes me think we could get away with the extra seams from using regular-sized bricks, if larger blocks prove impractical to source or use.

Current options:

AZS block or cast liners - Not well-suited for this particular job. Too expensive, too thermal shocky, and way overkill for this particular furnace.

AZS brick (Vision bricks) - Not bad on paper, but I've heard of multiple glassblowers who didn't like how these held up when used below the glass line.

High-alumina brick (Korundal XD) - My current go-to option. Have heard reasonably good things about them holding up, although I'd love to use something that didn't have a tendency to throw stones as it aged.

Flux block/high-silica block - This would be my preference, except I can't find anybody making the damn things anymore. All the sources I can find references to were supplying the West Virginia glass industry years ago and have all gone out of business.
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