EXPERIMENTAL RESEARCH OF THE BASIC FACTORS INFLUENCE ON ANTHRACITE GRINDING PROCESS AT PNEUMATIC TRANSPORT

Abstract

The paper is devoted to the topic of current interest on development of new effective and less energy expense methods and technologies of coal powder processing in the thermal power stations. One of the effective thin grinding methods is impact of solid particles at a hard balk. This method can be realized by the air stream acceleration of particle and their impact at the angle pipes dash elements of pneumatic transport mills. This device is intended for coal powder processing systems and allows combining the grinding process and pneumatic transport of coal, intended for flaring in the burners. The results of experimental researches of anthracite grinding in the laboratory pneumatic transport mill are presented. The experimental expression of influence of the air-coal mixture velocity, the angle of pipe’s turn in the transport pipeline, the mass concentration and the primary specific surface area of the ground material on the increase of specific surface area at the impact of dash elements in the pneumatic transport mill was defined.