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Method for manufacturing heat conducting element of far infrared radiation electric heating device

A heating device and heat conduction element technology, which is applied in the direction of heating element materials, manufacturing tools, sustainable buildings, etc., can solve the problems of poor high temperature resistance of silicon carbide heat conduction elements, low mechanical strength of heat conduction elements, and reduced thermal conductivity. Long life, high mechanical strength, and high recyclability

Active Publication Date: 2011-07-20
王欢 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the general-purpose far-infrared radiation electric heating device, the heat conduction element is made of silicon carbide, because the insulation performance of silicon carbide at high temperature is poor, usually when the temperature reaches above 700 ℃, the insulation performance gradually decreases, and the thermal conductivity also gradually decreases. ; The mechanical strength of silicon carbide heat conduction elements is also low, easy to be damaged during installation and maintenance, and the scrap rate is high, with a scrap rate of more than 20%; the high temperature resistance of silicon carbide heat conduction elements is poor, and the generally allowed use temperature is 600 °C Within, if it is used at high temperature for a long time, it will be easily damaged, resulting in bending deformation; the service life is also short, generally only about 25,000 hours can be used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A preparation method for a heat conduction element of a far-infrared radiation electric heating device, comprising the following steps: Al 2 o 3 , 2.72% SiO 2 , 0.76% MgO, 0.2% CaO, 0.02% Fe 2 o 3 , 0.1% K 2 O and 0.2% Na 2 O mix evenly, heat the paraffin to 60°C to melt it, then add melted paraffin and water to it, and stir evenly, the mass percentage of paraffin and water in the mixed system is 1% respectively; divide the stirred mixture into Batches are poured into metal molds, compressed by an air press, the pressure is 8kg, and the density of the mixture after compression is 4.19g / cm 3 , demoulding after pressing, and then put the product into a high-temperature kiln for two heating and firing: the first heating, first heating to 1150°C, and firing at this temperature for 28 hours. This procedure is dewaxing, Deoxidation process: the second heating, continue to heat up to 1400 ℃, firing at this temperature for 30 hours, firing ceasefire, after 5 hours of ceas...

Embodiment 2

[0019] A method for preparing a heat conduction element of a far-infrared radiation electric heating device, comprising the following steps: 2 o 3 , 0.95% SiO 2 , 1.7% MgO, 0.1% CaO, 0.05% Fe 2 o 3 , 0.1% K 2 O and 0.2% Na 2 O mix evenly, heat the paraffin to 60°C to melt it, then add melted paraffin and water to it, and stir evenly, the mass percentage of paraffin and water in the mixed system is 1% respectively; divide the stirred mixture into Batches are poured into metal molds, compressed by an air press, the pressure is 9kg, and the density of the mixture after compression is 4.24g / cm 3 , demoulding after pressing, and then put the product into the liquefied gas kiln, and carry out two heating and firing: the first heating, first heating to 1100 ° C, and then firing at this temperature for 30 hours, this procedure is the release Wax, deoxidation process; the second heating, continue to heat up to 1700 ℃, firing at this temperature for 24 hours, firing ceasefire, aft...

Embodiment 4

[0023] A preparation method for a heat conduction element of a far-infrared radiation electric heating device, comprising the following steps: Al 2 o 3 , 2% SiO 2 , 0.5% MgO, 0.14% CaO, 0.06% Fe 2 o 3 , 0.1% K 2 O and 0.2% Na 2 O mix evenly, heat the paraffin to 60°C to melt it, then add melted paraffin and water to it, and stir evenly, the mass percentage of paraffin and water in the mixed system is 1% respectively; divide the stirred mixture into Batches are poured into metal molds, compressed by an air press, the pressure is 7kg, and the density of the mixture after compression is 4.14g / cm 3 , demoulding after pressing, and then put the product into a high-temperature kiln, and carry out two heating and firing: the first heating, first heating to 1300 ° C, firing at this temperature for 20 hours, this procedure is dewaxing, Deoxidation process; the second heating, continue to heat up to 1800 ° C, firing at this temperature for 12 hours, firing ceasefire, after 12 hour...

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Abstract

The invention discloses a method for manufacturing a heat conducting element of a far infrared radiation electric heating device. The heat conducting element of a far infrared radiation electric heating device manufactured by the method has excellent heat conduction performance, can rapidly transfer heat produced by an electrified resistor belt, and can transform heat energy into stronger far infrared spectral radiation so as to enhance the full heat absorption of a heated material and greatly improve the heat efficiency. The heat conducting element manufactured by the method has high insulation performance at high temperature, even at 1500 DEG C, thereby achieving the goals of safety and explosion prevention; meanwhile, the heat conducting element has high strength and can not be damagedduring installation, has good high temperature resistance and can not be easily damaged after use at high temperature for a prolonged period of time, and has long service life which is three times longer than that of the silicon carbide heat conducting element of the prior art.

Description

technical field [0001] The invention belongs to the technical field of heating device components, and relates to a preparation method of a heat conduction element, in particular to a preparation method of a far-infrared radiation electric heating device heat conduction element. Background technique [0002] The far-infrared radiation electric heating device is mainly used for direct radiation heating of chemical materials in chemical containers such as reaction kettles, distillation kettles, enamel kettles, pipelines, distillation towers, and heat-conducting oil furnaces. It is an ideal heating equipment for high and low temperature heating. Its principle is the process of converting electrical energy into thermal energy, and then converting thermal energy into far-infrared radiation, that is, the high-temperature resistance band is energized to generate thermal energy, and then the heat is quickly transferred through the heat-conducting element as an insulating heat carrier...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B3/10C04B35/10C04B35/622B28B3/00
CPCY02B30/00
Inventor 王纪中
Owner 王欢
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