| 摘要 |
A refractory hearth for use in an industrial heat treat furnace is disclosed whereby the hearth contains no alloy parts with the exception of the pusher assembly and the roller chain attached to it. L-shaped ceramic, refractory or silicon carbide tile are placed in position to support material being heat treated, while at the same time preventing the roller chain from rising up out of place. The outside edges of said L-shaped tile shall act as guides to move stock trays in a straight path. Refractory material used to hold hearth in place will also support radiant tubes used to supply heat.
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