Smidth & Co. A/s

Cemgreen Aps

Mogens Juhl Fons

Flemming Schomburg

Lasse Norbye Dossing

Martin Hagsted Rasmussen

Sten Mortensen

The present invention relates to a device for heat-treating solid material, in particular in granular form, wherein the device comprises a kiln and an external heat generator, wherein said kiln comprises at least one sloped sliding surface on which a bed of said solid material slides down within said kiln due to gravity while a hot gas generated by the external heat generator is led through said solid material to heat said solid material to a desired temperature in order to change the substance properties of said solid material. According to the invention, said external heat generator for generating said hot gas is external to said kiln, wherein said kiln further comprises at least one kiln gas inlet through which said hot gas enters said kiln, such that the necessary temperature of said hot gas can be controlled precisely in that said hot gas is generated in said external heat generator, ensuring that the solid material does not experience temperatures above an allowed maximum temperature, and further such that the solid material is not exposed to radiation from a burner.

Device for producing supplementary cementitious material

A cooler for cooling particulate material which has been subjected to heat treatment in an industrial kiln, such as a rotary kiln for manufacturing cement clinker, which cooler comprises an inlet, an outlet, end walls, side walls, a bottom and a ceiling, at least one stationary supporting surface for receiving and supporting the material to be cooled, means for injecting cooling gas into the material, as well as a reciprocating scraper system which comprises a number of rows of scraper elements arranged transversely across the direction of movement of the material, said scraper elements being moved back and forth in the direction of movement of the material for conveying the material forward across the supporting surface. The cooler is peculiar in that each of the transverse scraper elements is firmly fixed to at least one drive plate oriented in the direction of movement of the material, said plate extending at least across the entire length of the supporting surface, and being led either through the supporting surface of the cooler, its ceiling, one of its side walls and/or at least one of its end walls, where the drive plate is connected to a drive arrangement for movement back and forth.

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Hadsund, Denmark

Mogens Juhl Fons