Model 1520 Raw‑Wood Carbonization Furnace: Parameter Breakdown.
Within the raw‑wood charcoal and nut‑shell carbonization industry, the Model 1520 raw‑wood carbonization furnace is a highly‑popular mainstream unit for medium‑small‑scale production and export. It is one of Yufeng Machinery’s flagship best‑selling equipment.
Purpose‑built for raw logs, tree branches and various nut‑shell feedstock, this furnace delivers broad material compatibility and simple operation, and produces high‑quality charcoal. Multiple units can be connected for parallel operation. Customers can expand total production capacity as business grows. It is well‑suited for large‑scale charcoal plants and overseas regions with abundant wood resources.

Core Physical Dimensions
The inner chamber of Model 1520 carbonization furnace adopts custom standard dimensions: 1.5 m in width and 2 m in depth.
It provides ample effective working volume with large loading capacity. Heat distribution inside the chamber is even to achieve thorough and uniform carbonization. Robust furnace construction ensures excellent sealing and thermal insulation. Heat loss is minimized, so char yield and finished‑product quality remain consistent.
Practical Production Parameters (Distinction between Wet and Dry Feedstock)
Actual output and processing cycle are top concerns for equipment buyers. Model 1520 delivers stable real‑world performance for regular mass production. Processing cycles differ noticeably between dry and wet raw materials. All parameters below are field‑verified practical data.

1. Char output per batch
Under standard charging and proper carbonization conditions, one single furnace yields 400‑500 kg of finished charcoal. It maintains stable char yield with few broken charcoal pieces and a high proportion of whole charcoal lumps.
2. Carbonization cycle
Processing time varies greatly according to material moisture content.
- For fully‑dried feedstock: dry hardwood, dry branches, dry coconut shells. Carbonization cycle takes only 8‑10 hours per batch for fast turnover.
- For moist raw materials: wet logs, fresh branches. Extended de‑watering phase brings total cycle above 20 hours.
General working cycle ranges from 10‑20 hours per furnace considering mixed wet‑dry operating conditions.

3. 24‑hour daily capacity
With single furnace running at full load and accounting for mixed wet and dry materials, stable daily output reaches 1.2‑1.5 tons. Rated capacity is realistic without over‑statement, meeting daily shipment demands of medium‑small charcoal factories.
Wide Range of Processable Raw Materials
Model 1520 is a multi‑purpose general‑use carbonization unit for hard biomass feedstock. It works with most common charcoal‑making materials.
Suitable feedstock includes mixed hardwood, fruit‑tree wood, log sections, tree branches, coconut shells, walnut shells and other hard biomass. Charcoal produced is hard‑textured, high‑calorific‑value and long‑burning. Its quality outperforms ordinary briquette charcoal, enjoying strong market recognition and better selling price.
Production Advantage: Expand Capacity via Multi‑Furnace Parallel Operation
A major operational strength of this model lies in flexible scaling. New investors can start with one single furnace for low‑risk trial production and steady return.
When order volume increases later, multiple Model 1520 furnaces can run in parallel. There is no need to replace equipment or rebuild workshops. Daily output can be directly stacked to realize large‑scale manufacturing. Ideal for customers planning gradual long‑term capacity expansion.

Overseas Adaptability: Suitable for Timber‑Rich Regions such as Laos
Large quantities of Model 1520 furnaces have been exported to Laos and other overseas territories with great field performance.
Laos possesses abundant wood resources with easy access to logs, mixed hardwood and branches at very low raw‑material cost, which perfectly matches the processing characteristics of this furnace.
Optimized for overseas raw‑wood charcoal projects, the machine features simple operation, rugged build and low failure rate. It is perfect for local‑material‑based on‑site processing to generate profits.
Summary
To sum up, Model 1520 raw‑wood carbonization furnace features reasonable dimensions, stable throughput, compatibility for both wet and dry materials and premium charcoal quality.
It supports small‑scale startup for new entrepreneurs as well as large‑scale expansion through multi‑furnace linkage. It serves raw‑wood charcoal projects both domestically and in wood‑rich overseas regions. It is a high‑cost‑performance, highly‑practical best‑selling raw‑wood carbonization furnace.