Abstract: A crushing ring of a crushing roll includes a base body with a through-opening, for connecting it to a shaft in a rotationally rigid fashion. At least one crushing tooth is in the form of a projection that is provided on the outer circumference of the base body and extends radially outward. A crushing cap encases the projection. The crushing cap includes a front wall section, a rear wall section and a head section that connects the two. A first pin-shaped connecting member detachably mounts the crushing cap on the projection. A second pin-shaped connecting member also detachably mounts the crushing cap on the projection. The second connecting member extends through the rear wall section of the crushing cap and is separably held in the projection.

Abstract: A crushing ring of a crushing roll includes a base body with a through-opening, for connecting it to a shaft in a rotationally rigid fashion. At least one crushing tooth is in the form of a projection that is provided on the outer circumference of the base body and extends radially outward. A crushing cap encases the projection. The crushing cap includes a front wall section, a rear wall section and a head section that connects the two. A first pin-shaped connecting member detachably mounts the crushing cap on the projection. A second pin-shaped connecting member also detachably mounts the crushing cap on the projection. The second connecting member extends through the rear wall section of the crushing cap and is separably held in the projection.

Abstract: A tubular burner for industrial furnaces is capable of achieving a good mixing of combustion gas and fuel. This burner contains an end section projecting into a combustion zone supplied with secondary combustion air, and several separate annular feed ducts for combustion gas and fuel bounded by tubular walls arranged coaxially one inside the other, individual nozzles being arranged in approximately annular distribution in the end wall of the combustion gas feed duct facing into the combustion zone. To achieve a good mixing of combustion gas/combustion air and fuel, at least one outer annular feed duct is constructed essentially as fuel feed duct, whilst the combustion gas feed duct equipped with individual nozzles is arranged radially inside this fuel feed duct.