Metallurgical biochar is a carbon-rich solid product obtained through the pyrolysis of biomass under anaerobic or oxygen-limited conditions. Its properties are highly dependent on production parameters, among which pyrolysis temperature is one of the most critical factors. Generally, high-temperature metallurgical biochar refers to biochar produced at temperatures above 800–1000 °C. At such elevated temperatures, its physicochemical properties undergo fundamental transformations, shifting from an agricultural soil amendment to a material with specialized industrial value.

Industrial-grade biochar differs significantly from traditional agricultural products, as it requires specific characteristics in terms of carbon structural ordering, chemical stability, pore structure, and purity. High-temperature pyrolysis promotes the transformation of carbon structures from amorphous forms toward graphitization, significantly enhancing conductivity, thermal stability, and mechanical strength, while also modifying surface chemical properties. These features give high-temperature biochar substantial potential to replace conventional fossil-based materials in industries such as metallurgy, energy storage, eco-friendly adsorption, and electrode materials.