Although a lower carbonization temperature can obtain a higher carbon yield, this charcoal has low quality and corrosiveness and contains acid tar substances, so it cannot be burned with a clean smokeless flame. The solid carbon content of high-quality commercial carbon should be higher than 80%, which requires us to control the final carbonization temperature above 500 ℃.
The wood fiber content of the raw material has a positive effect on the production of charcoal. Charcoal production welcomes mature materials with a strong structure. Dense wood can generally produce dense and strong charcoal. However, as the carbonization temperature increases, the fragility of charcoal will also increase. In actual production, it was found that when the final carbonization temperature is between 550 ℃ and -650 ℃, the fragility of charcoal and the solid carbon content Time can achieve a more ideal balance.
The key to the burning kiln is to control the kiln temperature. Through the adjustment of the air inlet, the purpose of controlling the temperature of the kiln can be achieved. The stable heating and cooling process is the guarantee for burning high-density charcoal. Taking the climatic conditions of Jilin in spring as an example, the entire process from ignition to charcoal discharge takes about 9 days, so that charcoal with a more ideal density can be obtained.
For the southern carbon plant, the cycle is longer. The high-temperature carbon refining stage after the end of the spontaneous decomposition stage determines the solid carbon content of the charcoal. If you want to burn good charcoal, you must work hard to control the kiln temperature and high-temperature charcoal. In addition, the kiln body must be kept sealed at all times, and no air leakage is required, which requires us to be very careful when building the kiln, especially in the drying stage of the kiln body.
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