Visualized heating furnace
A heating furnace and heating element technology, applied in the field of heating furnaces, can solve the problems of insufficiency, complex structure, high temperature loss of gold coating, etc., and achieve the effect of thermal insulation
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Embodiment 1
[0054] The diameter of the inner tube is 60mm and the height is 300mm; the diameter of the middle tube is 105mm and the height is 300mm; the diameter of the outer tube is 150mm and the height is 300mm. A support frame is provided on the outer wall of the inner tube, and there is a card slot on the support frame. The heating element is a silicon carbide rod with a diameter of 8mm. The thermal insulation coating on the outer wall of the middle tube is a gold-plated coating with a thickness of 50nm; There is a metal-free observation window (length 30mm, width 10mm) along the radial direction. The thickness of the inner tube, the middle tube and the outer tube is all 10mm. The temperature control meter uses Xiamen Yudian program temperature control device.
[0055] The implementation results are as follows:
[0056] The heating power can reach 2000W, and the maximum heating temperature is 1000°C. It takes 40 minutes to program the temperature from room temperature to 1000°C, and...
Embodiment 2
[0058] The diameter of the inner tube is 100mm and the height is 800mm; the diameter of the middle tube is 150mm and the height is 800mm; the diameter of the outer tube is 250mm and the height is 800mm. The outer wall of the inner tube is provided with a spiral groove, the heating element is a silicon-molybdenum rod with a diameter of 5.0mm, and the thermal insulation coating on the outer wall of the middle tube is a nickel-tungsten alloy coating with a thickness of 20nm; There is a metal-free observation window (length 300mm, width 100mm). The thickness of the inner tube, the middle tube and the outer tube is all 10mm. The temperature control meter uses Xiamen Yudian program temperature control device.
[0059] The implementation results are as follows:
[0060] The heating power can reach 5000W, the maximum heating temperature is 1100°C, it takes 20 minutes to program the temperature from room temperature to 1000°C, and the error is less than 1°C; it can run stably for a l...
Embodiment 3
[0062] The diameter of the inner tube is 40mm and the height is 350mm; the diameter of the middle tube is 125mm and the height is 350mm; the diameter of the outer tube is 180mm and the height is 350mm. The outer wall of the inner tube is provided with a spiral groove, and the heating element is made of Cr20Ni80 high temperature resistant resistance wire with a diameter of 1.0mm. There is a metal-free observation window (length 80mm, width 30mm) in the radial direction. The thickness of the inner tube, the middle tube and the outer tube is all 10mm. The temperature control meter uses Xiamen Yudian program temperature control device.
[0063] The implementation results are as follows:
[0064] The heating power can reach 1000W, the maximum heating temperature is 950°C, it takes 45 minutes to program the temperature from room temperature to 900°C, and the error is less than 1°C; it can run stably for a long time at 900°C, and the heating current is not higher than 3A. Under an...
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