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NEWS
A tube furnace can be heated with air, but there are some points to pay attention to when using air. Let's take a look below!
Large diameter tube type calcination furnace (click on the picture to view product details)
Calcination effect:
When calcining in air, due to the fixed and relatively small diameter of the tube furnace, the reaction between the material and oxygen may not be sufficient, resulting in incomplete calcination or unsatisfactory calcination effect.
Dust and impurities in the air may also have a negative impact on the calcination effect.
Calcination conditions:
To ensure the calcination effect, it is usually necessary to open both ends of the tube furnace to allow air to freely circulate and fully contact the material.
In some cases, the oxidation effect can be improved by connecting flanges at both ends of the tube furnace and using gas cylinders to introduce air from one end and exhaust exhaust gas from the other end.
Application scenarios:
One time calcination: suitable for time sensitive processes, such as the production of ceramic products, cement products, etc. This method has a short calcination time and high efficiency, but there may be a problem of uneven calcination.
Double calcination: suitable for processes that require high product quality, such as producing glass products, electronic components, etc. The first calcination is carried out at a lower temperature to remove moisture and volatile organic compounds from the material; The second calcination is carried out at a higher temperature to complete the chemical reaction process. This method has a uniform calcination effect and stable product quality.
Comparison with inert gas calcination:
In industrial production, in order to achieve better calcination effect and product quality, inert gases (such as nitrogen or argon) are usually used as ambient gases for calcination.
Inert gases have the characteristic of being non reactive and will not react with materials at high temperatures. They can be used as protective gases in calcination processes to prevent materials from being oxidized or contaminated.
The properties of inert gases also facilitate the control of calcination temperature, ensuring the stability and reaction rate of the reaction.
Matters needing attention:
When using a tube furnace for air calcination, special attention should be paid to controlling the calcination conditions, such as temperature, time, atmosphere, etc., to ensure that the sample is fully calcined.
For certain oxygen sensitive materials or processes, calcination in air should be avoided to prevent adverse reactions or affect product quality.
In general, tube furnaces can be calcined with air, but the appropriate calcination method and conditions need to be selected according to specific experimental or production needs. In industrial production, in order to achieve better calcination effect and product quality, inert gas is usually used as the ambient gas for calcination.Click to learn more tube furnaces! Or click on online customer service to learn more about product information!
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