IMPROVING THE FLOW IN THE DUCTS BETWEEN THE REGENERATORS RECUPERATORS AND COMBUSTION CHAMBERS OF COKE OVENS

摘要

A heating flue for a coke oven includes a wedge-shaped refractory brick having at least one oblique surface and vertical cylindrical bores when the brick is inserted into the vertical portion of a duct at the bottom of the heating flue. This part of the duct has an increased diameter to support the brick so that the vertical sides abut the inner duct walls and the bottom oblique surface extends toward the mouth of an obliquely-rising portion of the duct. The sum of the cross-sectional areas of the cylindrical bores in the brick is from 0.75 to 1.5 times the flow cross section of the obliquely-rising duct portion. The cross-sectional area of the top of a wedge-shaped brick which is coplanar with the flue base is in a range of between 20 and 200 with the cross section of the cylindrical bore in the brick. The diameter of the bore is between 10 and 60 millimeters. A ratio of 0.3 to 1.5 is formed between an acute angle between the oblique bottom surface and the horizontal and an angle between the obliquely-rising duct portion and the horizontal. The top surface of the brick may also be oblique and parallel with the bottom surface whereby the brick has the shape of a rhomboid.