Blackbody furnace-producing material and heating furnace

Abstract

The present invention relates to industrial heating furnace and kiln. The present invention has industrial standard black body of emissivity of 0.96 and no ageing in surface wall and top, and sintered high emissivity layer in the surface to constitute one infrared heating system. The present invention has increased heat transmitting area and controlled heat radiation lines aiming to heated workpiece and reinforced radiation heat transmission. The present invention is suitable for all kinds of furnace and kiln of different heat sources and has the effects of saving energy, homogenizing inside temperature, prolonging furnace lining life and reducing environmental pollution.

Description

technical field [0001] The invention relates to a heating furnace, especially heat treatment furnaces, forging heating furnaces, steel rolling heating furnaces, electric arc steelmaking furnace covers, ceramic firing kilns, glass tank kilns, etc. Casting furnaces, boilers, etc. Background technique [0002] Up to now, in order to improve the thermal efficiency of industrial heating furnaces, light-weight furnace materials aimed at reducing heat storage loss and heat dissipation loss have been adopted, or the furnace area is increased to enhance heat transfer, or the inner wall of the furnace is coated with high Emissivity coating, there are also technologies such as installing a device to change the heat transfer mode in the furnace. Furnace building materials are lightweight, and refractory fibers with a small bulk density are used as the surface or interlayer of the furnace wall, and even a full-fiber furnace is built. The all-fiber furnace does reduce the heat storage l...

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Problems solved by technology

However, this technical measure only blocks the heat in the furnace, but does not solve the diffuse reflection distribution of heat rays in the furnace. The rate of arrival of heat rays is low, and the emissivity of refractory fibers is not high, so the energy saving rate is not high. ; British "Glass" No.10 (1992) reported that Didier Fornital honeycomb refractory bricks are used on the top of the glass tank kiln. The contact interface between bricks and furnace gas is three times larger than that of standard bricks, which can save energy by 5% to 8% in theory.

But this brick can't control the heat rays, the heat rays can't directly shoot to the material to be heated, and the emissivity can't be improved, so the energy-saving rate is not high; Shanghai Science and Technology Publishing House said in the first edition of "Practical Energy-saving Technology" in April 1993 , Mizushima Works of Kawasaki Iron and Steel Company in Japan installed a "device for changing the heat transfer mode" on the steel rolling heating furnace, which converted part of the heat transferred by convection into radiation heat transfer to improve heat transfer efficiency and reduce the heat consumption of the heating furnace by 5 %, but the heat transfer area of ​​this method increases very little, the heat rays cannot be controlled, and the emissivity cannot be improved, so the energy saving rate is not high, and its technical implementation is difficult, and some parts are difficult to install; patent No. ZL94236755.3 "Strong Radiation Heat Transfer Energy Saving Industrial Furnace", although it solves the problem of increasing the heat transfer area and raising the emissivity, so that the heat rays are beamed and directly directed to the workpiece, which effectively strengthens the radiation heat transfer and saves energy. Up to 20% or more, but the implementation method is to install strong radiation elements on the built furnaces, for those furnace types that cannot or are not convenient to install strong radiation elements, such as pit furnaces, carburizing furnaces, and crucible furnaces , glass tank furnace, etc., the application is limited

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