Heat retaining curtains for reheat furnace discharge openings and charging openings
AssigneeSSE International Corporation
InventorHugh J. Harding
Life of this patent
Estimating the term…
Abstract
A discharge opening for a reheat furnace is shielded with a pair of metal woven wire mesh curtains each secured above the discharge opening and hanging to the bottom of the opening. Each curtain preferably is formed from multiple parallel coplanar ribbons, each extending from above the discharge opening to the bottom of the discharge opening. The mesh curtains are fabricated from a sag resistant metal alloy. Embodiments are described for accommodating slots which receive discharge lifter members for removing heated metal workpieces from the furnace. A preferred mounting apparatus employs one or more fibrous thermal insulation strips above the discharge opening. A counterweight mounting apparatus urges the fibrous thermal insulating strips against the outer wall of the furnace.
Claims14
A closure for a charging opening of a reheat furnace having heating means which develop high temperatures, above 2000.degree. F., in the region of said charging opening, said closure comprising:
- a water-cooled curtain holder secured outside said furnace at the upper edge of said charging opening;
- a water passageway extending lengthwise through said curtain holder;
- plural, parallel ribbons of woven, high-temperature, sag-resistant alloy metal wire, each said ribbon being secured at its top end in heat-conductive relation with said curtain holder and depending vertically toward the bottom of said discharge opening;
- said parallel ribbons substantially entirely covering said charging opening when depending freely from said curtain holder and being adapted to for lateral displacement to accommodate entry of a workpiece through said charging opening.
A discharge closure for a reheat furnace having a discharge opening for removing heated workpieces, comprising:
- a water-cooled curtain holder secured outside said furnace at the upper edge of said discharge opening;
- a water passageway extending lengthwise through said curtain holder;
- plural, parallel ribbons of woven, high-temperature, sag-resistant alloy metal wire, each said ribbon being secured at its top end in heat-conductive relation with said curtain holder and depending vertically toward the bottom of said discharge opening;
- said parallel ribbons substantially entirely covering said discharge opening when depending freely from said curtain holder and being adapted to for lateral displacement to accommodate withdrawal of a workpiece through said discharge opening.
A discharge closure for a reheat furnace having a discharge opening for removing heated workpieces, comprising:
- a water-cooled curtain holder secured to said furnace at the upper edge of said discharge opening;
- at least one water passageway extending lengthwise through said curtain holder;
- a first curtain and a second curtain, each comprising plural, parallel ribbons of woven, high-temperature, sag-resistant alloy metal wire, each said ribbon being secured at its top end in heat-conductive relation with said curtain holder and depending vertically toward the bottom of said discharge opening;
- said parallel ribbons substantially entirely covering said discharge opening when depending freely from said curtain holder and being adapted for lateral displacement to accommodate withdrawal of a workpiece through said discharge opening, said first curtain being generally parallel to and horizontally spaced-apart from said second curtain.
Dependencies are inferred from the claim text.