Company Blog 2025-07-16

How To Make Charcoal For Carbonisation?

2025-07-16

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Wood carbonisation is a process whereby wood is pyrolysed at high temperatures to remove substances such as moisture, volatile matter and ash from the wood to obtain a high carbon content. The wood carbonisation process is mainly divided into: preheating, carbonisation and cooling.

Preheating Stage

Firstly, start the continuous carbonisation furnace, and heat the air inside the furnace by burning charcoal, coal and other fuels. The temperature of the furnace is gradually increased, so as to preheat the raw material. This step evaporates water and other volatile substances from the raw material and dries the wood. At the same time, the emissions from the carbonisation process are reduced. As the wood raw material contains moisture and VOCs, it needs to be dried and de-ashred. Depending on the raw material, pre-treatment temperatures and times vary considerably. Typically, wood needs to be dried first to reduce its moisture content to less than 10%.

The Carbonisation Stage

brings the temperature of the continuous carbonisation oven to a specific level. Volatile organic compounds (VOCs) in the raw material begin to decompose, producing flammable gases such as methane and carbon monoxide. At the same time, the solid portion of the raw material begins to undergo carbonisation, resulting in the formation of carbonaceous solid fuels such as charcoal. During this process, technical parameters such as temperature and carbonisation rate must be controlled to ensure the quality of the carbonised product.

Cooling Stage

After a certain period of carbonisation, the volatile substances in the wood will be completely released, leaving behind pure charcoal. The charcoal is finally discharged through the cooling system. Finished charcoal.

Above is the process of charcoal carbonisation. There are differences in the carbonisation conditions and time for different woods, and it is necessary to adjust the heating parameters, holding time and other parameters according to the characteristics of the raw material and the requirements of the target product, so as to obtain the best carbonisation effect.