takahiili

Takahiili is a term primarily used in Finland to describe a type of coal that has been subjected to low-temperature carbonization. This process, often carried out in the absence of oxygen, transforms raw coal into a solid fuel with altered properties. Unlike high-temperature coke production, takahiili is produced at temperatures typically ranging from 400 to 700 degrees Celsius. This lower temperature range results in a product that still contains a significant amount of volatile matter, distinguishing it from coke.

The primary applications of takahiili have historically been in domestic heating and industrial processes where a less intense heating value compared to coke is desired. It can also serve as a feedstock for further processing or as a component in certain metallurgical applications. The exact composition and characteristics of takahiili can vary depending on the original coal source and the specific carbonization parameters employed. Its production is often linked to regions with accessible coal deposits and a demand for localized fuel sources. While less common now with the rise of other energy technologies, takahiili represents a historical method of coal utilization and energy production.