A METHOD FOR OPERATING RING-FURNACES AND A DEVICE FOR SUCH OPERATION

摘要

The present invention concerns a method and device for closing off one or mo re passages in a ring furnace for calcining of carbon bodies in which the furnace, during the calcining process, over an area comprising a small numbe r of sections, is divided into a preheating zone, a firing zone and a cooling zone, which are together successively moved forwards in the furnace. In orde r to control the false air intake from a first section (K-1) before the preheating zone to the first section (K1) in the preheating zone, one or mor e lowerable air dampers (4) are placed in the head wall (2). When the air damp er (4) or air dampers is/are lowered, it/they blocks/block the supply of false air from the first section (K-1) before the preheating zone to the first section (K1) in the preheating zone.