Rotary hearth for calcining kiln
AssigneeCalcimatic International Limited
InventorHubert L. Hall, deceased
Life of this patent
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Abstract
A rotary hearth for a kiln assembly in which the refractory material-bearing portion of the hearth is supported by a metal frame from below and is contained peripherally by a refractory buttress secured to the frame. In the preferred form of the invention, the refractory buttress comprises a lower layer of slightly circumferentially spaced buttress block and an upper layer of refractory rim tiles interlocking with the buttress blocks. The hearth is free of metal structural components in regions of high heat and thus free from the problems of cracking and jamming associated with assemblies of the prior art.
Claims10
A rotary hearth for a kiln assembly including in combination a circular refractory layer adapted to support material to be heated, a metal undercarriage supporting said refractory layer, a refractory buttress peripherally containing said refractory layer, and means for securing said buttress to said undercarriage, said refractory buttress being unconfined peripherally to permit free expansion and contraction without contact between the peripheral surface thereof and said undercarriage.
A hearth as in claim 7 in which said buttress portions and said metal plates are circumferentially elongated, said plates being secured to said undercarriage at intermediary portions thereof and being free to expand and contract circumferentially at the ends thereof relative to said undercarriage.
A hearth as in claim 7, further comprising a refractory rim peripherally containing said refractory layer, said rim overlying said buttress.
Dependencies are inferred from the claim text.