Bark & Scraps Charcoal

Specifications Details
Size < 30 mm
Shape Granules, chips, fragments, powder
Fixed Carbon > 45%
Calorific Value > 7000 kcal/kg
Ash Content < 15%
Moisture < 15%
Specifications may vary depending on raw material composition and end-use requirements.

Applications
Soil Improvement

• Improve soil aeration and soil structure 
• Support moisture and nutrient retention 
• Enhance root-zone growing conditions 

Bio-Fertilizer Applications

• Blend with organic fertilizers to produce slow-release fertilizer products 
• Support longer nutrient retention for crops 

Agricultural Growing 

• Used as growing media for ornamental plants, orchids, and selected crops 

Industrial Fuel Applications

• Heat generation for boilers 
• Thermal insulation and low-to-medium temperature industrial processes 

Environmental Applications

• Can be used in selected simple filtration systems for water and air treatment 

Packaging

• PP Bags (new or reused): 10 – 25 kg 
• Jumbo Bags: 500 – 1000 kg 
• Or customized according to customer requirements 

Supply Information

• Supply Capacity: 200 MT/month 
• Container Loading Capacity: 20’ Container: approximately 13 MT  , 40’ Container: approximately 22 – 24 MT 
• Delivery Terms: FOB – Ho Chi Minh Port or Hai Phong Port 
• Delivery Time: Approximately 7 – 15 days 
• MOQ: Subject to packaging and shipping arrangements

Bark & Scraps Charcoal is recovered throughout the entire charcoal production and finishing process, including charcoal unloading from carbonization kilns, sorting, cutting, splitting, sawing for size adjustment, crushing, packaging, and internal handling operations.
The material mainly consists of small charcoal pieces, charcoal powder, charcoal fines, carbonized tree bark, and broken charcoal fragments separated from the primary finished products during processing. This is not charcoal produced through a separate carbonization process, but rather fully carbonized material that does not meet the size or appearance requirements of the main commercial charcoal products.
Depending on production periods and product categories, the material may contain a mixed composition collected from different charcoal streams such as natural wood charcoal, plantation wood charcoal, or other carbonized charcoal products. Therefore, physical characteristics may vary from batch to batch.
Within the charcoal industry, recovery and classification of this material is a common practice to improve raw material utilization efficiency and reduce production losses. After collection, the material is further screened, cleaned of mechanical impurities, and classified by particle size before packaging.
Although classified as a secondary charcoal product, it still maintains a relatively high carbon content and offers a cost-effective solution for multiple applications. The material can be used as feedstock for charcoal briquettes, fuel pellets, soil improvement, blending with organic and microbial fertilizers, or industrial thermal applications that require lower-cost carbon materials compared with finished charcoal products.
For selected biochar-related applications, this material may also contribute to improving soil structure, moisture retention, and nutrient holding capacity, depending on raw material composition and application conditions.

Packaging

• PP Bags (new or reused): 10 – 25 kg 
• Jumbo Bags: 500 – 1000 kg 
• Or customized according to customer requirements 

Supply Information

• Supply Capacity: 200 MT/month 
• Container Loading Capacity: 20’ Container: approximately 13 MT  , 40’ Container: approximately 22 – 24 MT 
• Delivery Terms: FOB – Ho Chi Minh Port or Hai Phong Port 
• Delivery Time: Approximately 7 – 15 days 
• MOQ: Subject to packaging and shipping arrangements

Overview
Natural wood charcoal is produced from suitable wood species (typically wood materials with limited value for advanced wood processing applications) such as Mangrove, Longan, Eucalyptus, Coffee Wood, Khaya, and various orchard wood species through a carbonization process under oxygen-limited conditions.
During this process, most moisture, natural oils, wood tar, and volatile organic compounds are removed, while the carbon content is retained to form natural charcoal.
The production process consists of multiple stages, including raw material preparation, carbonization, sorting, packaging, and quality inspection before shipment, ensuring that the final products meet technical requirements, commercial specifications, and international transportation standards.

Step 1. Raw Material Sourcing
Raw materials are selected from wood species suitable for charcoal production, including Mangrove, Longan, Eucalyptus, Coffee Wood, Khaya, and various orchard wood species.
Depending on the product category, the wood may originate from plantation forests, fruit orchards, or other appropriately managed raw material regions.

Step 2. Wood Preparation
The wood is cut into logs or billets suitable for the carbonization process. Typical dimensions are approximately 500 mm in length and 50–200 mm in diameter. Larger logs are further cut or split to achieve the required size range.
Standardizing the raw material dimensions helps improve carbonization efficiency and facilitates subsequent grading and packaging operations.
For charcoal production, freshly harvested wood is generally preferred, as it often produces stronger and more stable charcoal after carbonization.

Step 3. Kiln Loading
The prepared wood is loaded into the carbonization kilns manually or semi-manually.
Proper and uniform stacking ensures efficient heat and airflow circulation throughout the kiln during the production cycle while minimizing shifting, collapsing, or breakage of the material.

Step 4. Carbonization
This is the most important stage of the entire production process.
The kilns are designed with dedicated firing chambers that gradually increase the internal temperature through two main stages:
Stage 1 – Moisture Removal (150–200°C)
Free water and internal moisture are gradually removed from the wood. This stage essentially functions as a thermal drying process.
Stage 2 – Carbonization (350–400°C)
The temperature continues to rise, removing the remaining moisture, natural oils, wood tar, and volatile organic compounds. Under oxygen-limited conditions, the wood structure is gradually transformed into charcoal while the carbon content is retained to form natural wood charcoal.
Depending on the wood species, kiln design, kiln size, and environmental conditions, the carbonization process typically takes between 4 and 6 weeks.
This is the most important stage of the entire production process.
The kilns are designed with dedicated firing chambers that gradually increase the internal temperature through two main stages:
The average charcoal recovery rate ranges from approximately 18–25%, meaning that every 100 kg of raw wood typically yields around 18–25 kg of finished charcoal.

Step 5. Natural Cooling
After carbonization is completed, all kiln openings are completely sealed, allowing the charcoal to cool naturally. This is the final stage of the carbonization process.
Natural cooling helps stabilize the charcoal structure, minimize cracking, and prevent re-ignition when exposed to oxygen. The cooling period typically lasts between 1 and 2 weeks, depending on kiln size and construction.

Step 6. Sorting & Grading
After unloading from the kiln, the charcoal is sorted according to size, shape, and quality.
Products that do not meet the required standards, such as partially carbonized or under-carbonized pieces, are removed or reprocessed when appropriate.

Step 7. Processing & Packaging
Depending on customer requirements, the charcoal may be cut, split, crushed, or cleaned to remove any remaining bark before packaging.
Products are packed in PP bags, BOPP bags, paper bags, cartons, or other packaging formats according to customer specifications and target market requirements.

Step 8. Quality Control
Each production batch undergoes quality inspection before shipment.
Quality verification may include combustion testing after kiln unloading and laboratory analysis when requested by customers.
Inspection criteria typically include charcoal type, size, moisture content, hardness, and packaging specifications according to internal standards or customer requirements.

Step 9. Warehouse Storage
After packaging, finished products are stored for a minimum of 7 days in dry and well-ventilated warehouse conditions to ensure fire safety and maintain stable product quality prior to shipment.

Step 10. Container Loading & Export
Products are loaded into containers according to packaging specifications, customer requirements, and international maritime transportation standards.
After final inspection, the cargo is transported to the port and exported under the agreed international trade terms.