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How to avoid contaminant residues in graphite vacuum furnaces?

2022-10-11 08:45:54
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Graphite vacuum furnace is a kind of equipment used for high temperature treatment, mainly used for heat treatment of metal materials, graphitising treatment, chemical vapour deposition and other processes. In the process of using graphite vacuum furnace for material treatment, how to avoid pollutant residue is very important, which can be achieved through the following aspects.

First of all, choose suitable raw materials. The purity and quality of the raw materials directly affect the residual contaminants in the graphite vacuum furnace. Therefore, when using graphite vacuum furnace for material processing, high purity raw materials should be selected, and avoid selecting raw materials containing harmful impurities.

Secondly, purify the furnace chamber. Before the graphite vacuum furnace treatment, the furnace chamber needs to be purified first. The gas and pollutants in the furnace cavity can be removed by means of multiple heating and vacuum extraction. This can effectively reduce the number of pollutants in the furnace cavity, to avoid its residual in the subsequent treatment process.

How to avoid contaminant residues in graphite vacuum furnaces?

Third, control process parameters. When using graphite vacuum furnaces for material treatment, precise control of process parameters, such as temperature, pressure, atmosphere, etc., is required. By optimising these process parameters, the generation and residual of pollutants can be reduced. For example, for some volatile pollutants, the residue in the furnace chamber can be reduced by lowering the treatment temperature and increasing the pumping speed.

Fourth, use appropriate protective measures. In the graphite vacuum furnace treatment, you can use appropriate protective measures to reduce the residual pollutants. For example, when dealing with substances that are easy to oxidise, you can prevent the occurrence of oxidation reactions by increasing the protective gas in the atmosphere, such as nitrogen, hydrogen, etc., so as to reduce the residue of oxidation products.

In addition, regular cleaning and maintenance of the furnace chamber is also very important. After a long time of use, there will be certain deposits and residues inside the graphite vacuum furnace, and these contaminants may affect the quality of subsequent treatment. Therefore, it is recommended that the furnace chamber be cleaned and maintained on a regular basis to remove the residues and ensure that the furnace chamber is clean and tidy.

In short, avoiding the residue of pollutants in the graphite vacuum furnace is a comprehensive issue that requires comprehensive consideration and implementation from a variety of aspects such as raw material selection, furnace chamber purification, process parameter control, protective measures and regular cleaning. Only by doing a comprehensive job in these aspects can we effectively reduce the residue of pollutants and ensure the quality and stability of material handling.

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