Radiant tube type heater
AssigneeToshiba Ceramics Co., Ltd.
InventorsKazunori Meguro, Toshiaki Itoh, Shigeru Abe
Life of this patent
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Abstract
A radiant type heater for use in a heating furnace has inner and outer concentric tubes. The tubes have a structure in which silicon carbide particles are joined to each other by a sintering aid such as an aluminum compound sintering aid or a boron compound sintering aid.
Claims13
A radiant heater for use in a metallurgical heating furnace, comprising an outer tube fixed to the heating furnace and an inner tube concentric with the outer tube defining an annular space therebetween, at least one of said inner and outer tubes having a grain structure in which silicon carbide particles are joined together by a sintering aid in pressureless sintering, said grain structure consisting essentially of silicon carbide, carbon and 3-15 wt % of a sintering aid, the sintering aid being selected from the group consisting of aluminum compounds and boron compounds.
A radiant heater for use in a metallurgical heating furnace, comprising a tube fixed to the heating furnace and having a grain structure in which silicon carbide particles are joined together with a sintering aid by pressureless sintering, said grain structure consisting essentially of silicon carbide, carbon and 3-15 wt % of a sintering aid, the sintering aid being selected from the group consisting of aluminum compounds and boron compounds.
A method of heating molten metal in a metallurgical furnace comprising immersing at least one radiant heater element in said molten metal, said radiant heater element comprising at least one tube having a grain structure in which silicon carbide particles are joined together by a sintering aid in pressureless sintering, said grain structure consisting essentially of silicon carbide, carbon and 3-15 wt % of a sintering aid, the sintering aid being selected from the group consisting of aluminum compounds and boron compounds.
Dependencies are inferred from the claim text.