Abstract: According to the invention pulverized solid fuel is processed by heating the fuel to a temperature at which thermal decomposition of the fuel begins and subsequently heating the fuel to a temperature at which an intense thermal decomposition of the fuel takes place to form a vapor-and-gas suspension containing pulverized particles, gas, tar vapors and pyrogenic water vapors. The resultant vapor-and-gas suspension is cooled in a chamber by water and/or pyrogenic water to a temperature from 360.degree. to 140.degree. C. at which pulverized solid particles adsorb heavy tar. To obtain the resulting product in the form of a pulp, the vapor-and-gas suspension is cooled for a second time to a temperature from 80.degree. to 20.degree. C. at which the fractures of intermediate and light tars are condensed.Combustion heat of resulting solid matter is higher than that of the product obtained by a conventional method; in addition, it may be conveyed by a water channel.