ENG: The development of new and improvement of existing technologies for the calcination of carbonaceous materials requires their specific heat capacities, which are key factors of the process. Analytical temperature dependences of specific heat capacities of carbonaceous materials were established in the study, considering material transformations and determination errors when they are heated to a temperature of 1800oC and then cooled to a temperature of 20oC. The minimum necessary temperatures of the calcination process and their duration are also determined, which are guaranteed to ensure the required quality of the products in conditions of dispersion of the properties of the raw materials. The new dependencies facilitate for more reliable mathematical modeling of the calcination process of carbonaceous materials by taking into account material transformations and the direction of temperature change and will ensure a more rational development of calcination furnaces and the process. Additionally, the determined theoretical minimum possible specific energy consumption allows for estimating the energy efficiency of the calcination process.