STUDY OF TECHNOLOGICAL OPTIONS TO LOAD HAMMER MILL FOR GRINDING COAL

摘要

The maintenance of a power plant it is an important issue for all energy producers. A vulnerable point of a power plant is coal grinding mill. The main objectives of the investigation is to increase the lifetime of the coal grinding mill This paper presents several technological options to load hammer from coal grinding mill. The experimental technological variants analyzed are thermal spraying and welding load. This paper presents the method of thermal spraying in plasma jet with ceramic powder and weld load in two cases. For the obtained samples, were made structural examinations and hardness tests. The paper shows a technological variant that are applied to load hammers from a coal grinding mill to increase the durability. The hardness of the deposited layers (which are the active surface) increases very much, about three times after the technological variant is used.