1. Muffle furnace structure:
Furnace shell is made of thin steel plate by folding and welding, epoxy powder electrostatic painting process, the inner furnace lining is a rectangular integral furnace lining made of silicon refractory; the door brick of the electric furnace is made of lightweight refractory material, between the inner furnace lining and the furnace shell The heat insulation layer is made of refractory fiber and expanded perlite products. The front panel and bottom corner of the resistance furnace are made of cast iron, and the outer shell is made of cold plate. The appearance is smooth and the appearance is not deformed. The furnace door is fixed on the box body through a multi-stage hinge. The furnace door is locked by the weight of the door handle, and the furnace door is fastened to the furnace mouth by lever action. When opening, just lift the handle upwards, and then pull it out to the left side of the electric furnace after the hook is released. A controllable chimney is installed behind the furnace, which provides convenience for the chemical analysis of coal, chemical raw materials and products.
2. Installation of resistance wire:
A spiral heating element made of iron-chromium-aluminum alloy is threaded in the upper, lower, left, and right wire grooves of the inner furnace lining core. The heating element is heated by high-temperature iron-chromium-aluminum resistance wire. The resistance wire is wound outside the furnace chamber to effectively protect the resistance wire from being injured. The furnace lining is a sealed structure, and the furnace core can be drawn out from the small door at the back of the furnace, which is more convenient for maintenance than other similar furnaces; the lower end of the furnace mouth is equipped with a safety switch interlocked with the furnace door. When the furnace door is opened, the heating circuit is automatically cut off, with the door open Automatic power off function to ensure safe operation.
3. Temperature control range of muffle furnace:
Low-, medium-, and high-temperature box-type resistance furnaces, with a rapid temperature rise of 1000oC from 100oC to 1000oC, less than 30 minutes; 1700oC furnace from 100oC to 1700oC, less than 90 minutes; with resistance wire, silicon carbon rod, and silicon molybdenum rod, respectively For heating elements, the use temperature is 300 ~ 1700 ℃. Significant energy saving effect, long life and low maintenance cost. For silicon molybdenum rods and silicon carbon rods, the former can reach a temperature of 1600 and the latter is 1300; good energy saving: generally 6L and 9L furnace models use 16A / 220V standard power supply; 20 and 30L furnace models use 16A / 380V three Less thermal pollution of the phase power supply. Due to the good thermal insulation of the new material, the temperature is raised to 1000oC, and the shell surface is not hot after about 1 hour (about 60oC). The high-temperature resistance furnace with silicon carbon rod as the heating element has a large difference between the resistance value of the heating element in the cold state and the hot state. In long-term use, the resistance value of the silicon carbon rod will gradually increase (also called aging). So it must be used with a controller with voltage regulation function.
HG-10-4B ceramic fiber muffle furnace is the essence of Shanghai Hegong Scientific Instrument Co., Ltd.'s continuous research for many years. It completely changes the shortcomings of the domestic muffle furnace, the electric furnace wire is easy to damage, and the heating rate is slow. Its performance reaches the level of imported similar products. HG-10-4B ceramic fiber muffle furnace is one of the most cost-effective products in China.
The content of this product comes from ceramic fiber muffle furnace (box experimental electric furnace)
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