We consider principle of operation and a procedure of evaluation of the constructive, energy, and force parameters of the drive of a new system of unloading of a shaft lime-gas furnace. The proposed method enables us to determine the power of the electromechanical drive of the system with the rational number of knives-scrapers required to guarantee the desired productivity of a vertical-type furnace with the maximum possible uniformity of the unloading of burnt lime over the perimeter of a moving hearth with regard for the mechanical characteristics of the loose material and the design parameters of the unit.