Complete Process of Using a Sawdust Log Maker Machine

 

 

Step 1: Raw Material Pretreatment to Adapt to Sawdust Charcoal Extruder Machine Requirements

First, fresh sawdust undergoes pretreatment, with key control over particle size and moisture content. The sawdust is pulverized to 2-8mm using a crusher to remove impurities such as stones and metal. Then, it is sun-dried or dried to adjust the moisture content to 8%-15%. This step is crucial for adapting to the briquetting machine. Excessive moisture content leads to sticking to the mold and loose molding, while insufficient moisture content prevents the lignin from softening, hindering the production of dense briquettes and causing breakage during subsequent carbonization.

 

Step 2: Sawdust Charcoal Making Machine (MA) Pressing to Create Carbonization Base Material

The pretreated sawdust is fed into the sawdust briquetting machine. The equipment uses a spiral extrusion and friction heating principle, operating at 160-200℃ and 15-25MPa pressure, relying on the self-binding of the sawdust's lignin to press it into dense sawdust briquettes (log) with a length of 30-50cm and a diameter of 20-50mm. The rollers and molds of the briquetting machine must be made of alloy steel to ensure the briquette density reaches 1.0-1.2 g/cm³, laying the foundation for the shape and density of the briquette during subsequent carbonization. This is a core advantage that distinguishes it from the carbonization of loose sawdust.

Step 3: Drying the Sawdust Briquettes to Reduce Carbonization Risks

The sawdust briquettes pressed by the sawdust charcoal machine contain some residual heat and moisture. They need to be naturally dried for 24-48 hours to further reduce the moisture content to below 5%. Drying the sawdust briquettes increases their stability, preventing cracking caused by rapid moisture evaporation after being fed into the carbonization furnace. It also reduces the accumulation of volatiles during carbonization, lowering the risk of fire. Although this step is simple, it directly affects the yield of finished charcoal.

 

Step 4: High-Temperature Carbonization, Converting into Finished Charcoal

The dried sawdust rods are fed into a carbonization furnace and processed in four stages: drying (100-200℃) → pyrolysis (200-400℃) → carbonization (400-600℃) → cooling. Throughout the process, the oxygen content is controlled to ≤5% to prevent complete combustion of the sawdust rods. After carbonization, the temperature is cooled to below 50℃ to obtain finished wood chip charcoal with a fixed carbon content of over 70% and a calorific value of 6000-7000 kcal/kg. The dense rods pressed by the wood chip charcoal extruder can control carbonization loss to within 8%, far lower than the 20% loss of loose sawdust carbonization.

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1.What is the price of equipment for the rice husk charcoal making machine?

It costs approximately US$1,500.00 - 25,000.00

 

2. If equipments have some quality problem, how would you deal with?
We will responsible for all the quality problems. Change all the parts for free.

 

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