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Identifying the optimal raw materials for charcoal production is only the first step to success. Scientifically and rationally pre-treating these raw materials is crucial for transforming their potential into high-quality charcoal products. The pre-treatment process directly impacts the efficiency of subsequent carbonization and molding, as well as the quality of the final charcoal bars.
The primary task of pre-treatment is controlling the moisture content of the raw materials. Excessive moisture content significantly hinders the carbonization reaction, consuming additional energy and potentially causing cracking, loosening, and failure of the charcoal bars to form. Therefore, reducing the moisture content of the raw materials to the ideal range through natural air-drying or mechanical drying is essential for ensuring the charcoal bars possess sufficient density and hardness.
Secondly, the particle size of the raw materials must be carefully controlled. Whether it's sawdust, rice husks, or other biomass, they must be crushed into uniformly sized, fine particles using a pulverizer. This significantly increases the specific surface area of the material, allowing for closer contact during the subsequent mixing and extrusion processes, resulting in compact, smooth charcoal bars and avoiding breakage caused by uneven particle size.
Furthermore, in some cases, depending on the characteristics of the raw materials, it may be necessary to add a small amount of natural binder to aid in shaping. While lignin itself is a natural binder, for raw materials with poor fiber structures, adding an appropriate amount can significantly enhance the mechanical strength of the charcoal rods, making them less prone to breakage during transportation and use.
Thus, meticulous raw material pretreatment is crucial for the efficient and stable production of high-quality machine-made charcoal. While this step doesn't directly result in the finished product, it profoundly impacts every aspect of production.
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