GB1290639A - - Google Patents

Abstract

1290639 Cooling cement clinker CLAUDIUS PETERS AG 19 April 1971 [6 March 1970 7 March 1970 4 April 1970 19 Nov 1970] 23227/71 Heading F4B A two-stage cooler for cement clinker discharged from a furnace 1 comprises an aircooled grate 3 followed by a crusher 4 and a bucket elevator 7 feeding an indirect cooler in the form of shafts 11-14 over which the material is distributed by a scraper chain 15, each shaft having rows of fluid cooling tubes 19. The latter may be roughly elliptical in shape and disposed in staggered rows defining a sinuous course for the material in the shafts (Fig. 2). Alternatively, they may be arranged in blocks with the tubes making several passes across the shaft (Fig. 3), in which case one block may be cooled by air and another by water or oil. The final section of the grate 3 may be a sieve discharging on to a scraper chain 6 which also picks up material from the crusher 4 via shoot 5 feeding it to the elevator 7. The latter discharges on to a sieve 8, oversize material being returned to the crusher 4 by a pipe 9. The shaft may be discharged through an apertured bottom plate with another reciprocable, similarly apertured plate disposed below it, the apertures in the first plate being disposed above the solid portions of the lower plate (Fig. 2) this arrangement discharging material on to the conveyor 18. In a modification (Fig. 3) the shaft terminates in two hoppers with slots disposed over a table tiltable to discharge into a lower hopper feeding the conveyer. Another similar modification (Fig. 4) has below the discharge slots stationary tables which are swept by ploughs on endless chains.