Device for the heat treatment of predominantly mineral material having a residual calorific value, in particular for ceramicising tailings arising in coal production

摘要

The invention relates to a device for the heat treatment of predominantly mineral material having a residual calorific value, in particular for ceramicising tailings arising in coal production, with a dryer (2), a fluidised-bed reactor (8), a final heating stage (14) designed as a fixed-bed reactor, and a cooler (18) with a downstream discharge lock (20). To simplify the design and to improve the energy balance, all units should be arranged vertically one above the other in a common reactor tower (1). Between the fluidised-bed reactor (8) and the final heating stage (14), and between the final heating stage (14) and the cooler (18), narrowed passage openings and, respectively, funnel-like transitions (13, 17) are provided in each case, so that the material located in the fluidised-bed reactor (8), in the final heating stage (14) and in the cooler (18) forms a continuous column. A circulating gas flows through the material in the cooler (18) and in the dryer (2). IMAGE