Fremgangsmåde og indretning til transportering af et bulkmaterialelag på en rist

摘要

Process for treating, especially cooling, a bulk material layer uses a gas stream on a grid consisting of several panels (10) extending in the conveying direction. The panels are driven forward and backward in the conveying direction so that at least two adjacent panels are moved forward at the same time and moved backward at different times. An independent claim is also included for a device comprising a grid used for treating, especially cooling, bulk material using a gas. Preferred Features: The width (9) of the panels is kept so narrow that the friction exerted by the panels on the material is lower than the friction exerted by material lying on adjacent panels or by the housing walls.