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What are the methods for carbonizing charcoal in a carbonization furnace?

There are two main methods for carbonizing charcoal in carbonization furnaces: retort carbonization and internal combustion carbonization.

Retort carbonization is to put the wood into a carbonization furnace, seal it and then heat it. This process can be divided into three stages: low temperature dehumidification stage, high temperature calcination stage and cooling stage. In the low-temperature dehumidification stage, about 8% of the moisture contained in the charcoal is discharged to prevent moisture cracking and ensure the quality of carbonization. The high-temperature calcination stage will produce a large amount of combustible gas, which can be used to heat the furnace or provide a drying heat source. After the cooling stage, natural cooling or spray cooling can be adopted.

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Internal combustion carbonization uses heat and ignition at the bottom of the furnace to deprive the wood of oxygen and heat it, producing flammable gases. These gases return to the bottom of the furnace through the pipeline to continue to heat up and become carbonized. When the combustible gas comes out, the furnace will automatically heat up and carbonize. If the temperature exceeds 500 degrees and the excess gas heat source is too large, the temperature control valve can be opened to release the excess gas and lower the temperature. When the combustible gas inside the furnace has burned out, the carbonization part has been completed.

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  • James**** 2025-11-03

    We want to make Biochar using coconut husk, startup with small scale industry. Advice and training. Cost of the machine and all other associate equipment.

  • Muke**** 2025-10-31

    1. More information on making Charcoal out of sawdust 2. The price of the machine 3. How long does it take to be deliver the machine 4. It requires how much space. 5. How many people required to run the machine.

  • Srini**** 2025-10-25

    I'm looking for a wooden Charcoal processing machine. Kindly advise me accordingly. Looking forward to make business with you.

  • Pilave**** 2025-10-11

    We need a line for block Charcoal. Please share complete details along with the layout and price. Capacity: 10/t Charcoal per day.

  • Mitun**** 2025-09-29

    How to set up a Charcoal production manufacturing plant. Please provide details of prices , production plant details and your services.

  • Sushi**** 2025-09-18

    Model number 1000 , with project Report sizes of the plot required with power consumption and required power to start the plant

  • Dr.balm**** 2025-08-31

    Looking for a complete sawdust to charcoal briquette line. Quote for machine price, delivery time to Ghana, power consumption, and required floor space.

  • Sanje**** 2025-08-20

    Inquiry about charcoal briquette machine for making hexagonal coal balls. Share machine price, production capacity per hour, and warranty terms. Can you send proforma invoice for CIF Mumbai?

  • vishal**** 2025-08-12

    Need continuous carbonization furnace for coconut shell & wood chips. Capacity: 5 tons/day.

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    Looking for a biochar reactor for rice husk. Our main concern is electricity consumption and continuous operation ability. Please specify the power (in kW) of your system and the expected biochar output per kg of raw material.

  • Praful**** 2025-07-28

    Interested in an environmentally friendly biochar machine for wood chips. The system must have smoke scrubbers to meet EU emissions standards. Provide details on the pollution control system and its cost.

  • BIKASH**** 2025-07-20

    For a municipal green waste recycling project, we require a large-capacity biochar production plant. Need a detailed project report, EPC solution, and long-term technical support agreement. Please arrange an online meeting.

  • Nkame**** 2025-07-13

    I have a large farm with abundant palm waste. Need a simple, durable biochar kiln that 2-3 workers can operate. Training video and manual in Spanish are necessary. What is the delivery time to Brazil?

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    We need a mobile biochar unit on a trailer for processing forestry residues on-site. Please send information on your mobile models, their setup requirements, and a price range.

  • Adity**** 2025-06-30

    We want to test making biochar from sewage sludge. Do you have a machine suitable for this high-moisture material? We need a pre-dryer and a pilot system quotation. Can you process a sample of our sludge?

  • Morio**** 2025-05-23

    Comparing continuous vs batch type biochar reactors for our farm cooperative.

  • Esteb**** 2025-05-19

    We require a high-temperature carbonization furnace capable of reaching 800°C+ for producing high-grade biochar from hardwood. Specific focus on furnace lining durability and thermal efficiency. Quote requested.

  • ARGOP**** 2025-03-21

    Our city council is seeking a biochar solution for park and garden waste. Need a medium-capacity system with low noise and emissions for urban setting. Full project proposal with operational cost analysis is required.

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    We are a small startup in Uganda. Need the most affordable, functional biochar kiln for coffee husks. Even used or refurbished equipment considered. Payment in installments possible?