Walking hearth furnace
AssigneeThermoprocess GmbH
InventorHelmut Heuss
Life of this patent
Estimating the term…
Abstract
A walking hearth furnace comprising fixed and walking hearths (1 to 3 respectively 4,5) on the refractory lining of which the work (6) is placed. Slanted surfaces are worked into the refractory lining forming depressions (15) and causing the work to be heated from underneath. The pieces of work are arranged in such a manner that spaces form between them, through which the heat from above can act on the slanted surfaces. Furthermore, the slanted surfaces serve to remove the scale both through the slots between the hearths and through scale chutes (16) which lead downwards out of the depressions (15) and operate in conjunction with scale removal devices (22).
Claims20
A walking hearth furnace oriented to reheat work, having a top surface and a bottom surface, as the work is transferred through the walking hearth furnace in a longitudinal direction, comprising:
- a plurality of hearths that, in operation, transfer the work along the longitudinal direction, each of said plurality of hearths include at least a first slanted surface and a second slanted surface positioned to be proximate to the work;
- a plurality of depressions positioned between each of said first and second slanted surfaces of said plurality of hearths and formed by at least said first and second slanted surfaces;
- and
- a plurality of heating devices oriented above said plurality of hearths, said plurality of heating devices reheating the top surface of the work and causing at least said first and second slanted surfaces to transfer heat to the bottom surface of the work.
A walking hearth furnace oriented to reheat work, having a top surface and a bottom surface, as the work is transferred through the walking hearth furnace in a longitudinal direction, comprising:
- a plurality of hearths that, in operation, transfer the work along the longitudinal direction, said plurality of hearths include
- at least one fixed hearth having a first slanted surface and a second slanted surface, and
- at least one walking hearth oriented adjacent to said at least one fixed hearth, said at least one walking hearth having a third slanted surface and a fourth slanted surface;
- a depression formed by at least said second slanted surface and said third slanted surface;
- and
- a plurality of heating devices oriented above said plurality of hearths, said plurality of devices reheating the top surface of the work and causing said depression to transfer heat to the bottom surface of the work.
A walking hearth furnace oriented to reheat work, having a top surface and a bottom surface, as the work is transferred through the walking hearth furnace in a longitudinal direction, the walking hearth furnace comprising:
- a plurality of hearths that, in operation, transfer the work along the longitudinal direction, each of said plurality of hearths include at least a first slanted surface and a second slanted surface proximate to the work and opposite of the work during transfer;
- and
- a plurality of heating devices oriented above said plurality of hearths, said plurality of heating devices reheating the top surface of the work and causing at least said first and second slanted surfaces to transfer heat to the bottom surface of the work.
Dependencies are inferred from the claim text.