Why are bimetallic plates used in the alumina tubes of muffle furnaces?

　　Currently, traditional refractory bricks are still widely used. Muffle furnace corundum tubes are mostly still in use. The furnace shell gets very hot, and wiring faults are a common problem encountered by many users. Muffle furnace corundum tubes typically use a single shell, with an iron plate directly wrapping the hot chamber. This is a simple and inexpensive method.

　　However, the drawbacks are also obvious: when used for a long time, the outer shell temperature is very high, and users need to connect the controller circuit and heating circuit themselves. The thermocouple also needs to be wired by the customer. This requires electrical knowledge and hands-on ability. This is not a small challenge. Due to the simple structure, the wire joints are exposed, and there are minor hidden dangers.

　　However, the production technology and processes of muffle furnace corundum tubes are also keeping pace with the times. We delve into user pain points, summarize experience, and continuously improve. User-friendly and reliable Muffle furnace corundum tubes is customized according to user needs. The integrated intelligent muffle furnace corundum tube consists of a double-layer metal plate, a thermal insulation layer inside the hot chamber, and an internal air insulation layer. There is forced cooling between the inner and outer shells, greatly improving the heat generation problem of the furnace body. The upper part of the furnace is the heating zone, and the lower part is the loop zone. The control circuit is already connected to the heating circuit inside the furnace. Users can plug it in and use it. Installation and connection are very easy. The circuit is protected within the shell. There are no external circuits, greatly improving safety.

　　 Muffle furnace corundum tubes Reasonable choice of combustion method:

　　1. In order to achieve the economic operation index of the muffle furnace corundum tube, the problem of complete fuel combustion must be solved.

　　2. Sufficiently high furnace temperature

　　Temperature is the main condition for fuel combustion. The low temperature required for fuel to start a vigorous oxidation reaction is called the ignition temperature. The heat required to heat the fuel to above the ignition temperature is called the heat source. The heat source for igniting fuel in the combustion chamber generally comes from the heat radiation of the flame and furnace wall and contact with high-temperature flue gas. The furnace temperature composed of the heat source must be maintained above the ignition temperature of the fuel, that is, the furnace temperature must be high enough to allow the fuel to continuously burn, otherwise the fuel will be difficult to ignite, unable to burn, or even be cut off.

　　3. Appropriate amount of air

　　During combustion, the fuel must be in full contact and mixed with sufficient air. When the furnace temperature is high enough, the combustion reaction speed is very fast, and the oxygen in the air is consumed quickly. Sufficient air must be provided. In actual operation, the air sent into the furnace is excessive, but excessive air should not be too much, and it should be appropriately avoided to reduce the furnace temperature.

　　4. Sufficient combustion space

　　The combustibles or fine coal dust volatilized from the fuel will burn with the flue gas flow. If the furnace space is too small and the flue gas flow is too fast, the flue gas stays in the furnace for too short a time, and the combustibles and coal dust cannot be fully burned. In particular, when the combustibles come into contact with the boiler heating surface before being completely burned, the combustibles are cooled to below the ignition temperature and cannot be completely burned, forming carbon deposits.

　　5. Sufficient time

　　Fuel combustion takes time, especially for coal-fired furnaces. The larger the burning particles, the longer the burning time.

　　Our company is a manufacturer of high-purity alumina ceramic tubes and corundum crucibles, mainly operating Muffle furnace corundum tubes high-temperature crucibles, alumina boats, corundum tubes, etc., welcome to contact us.