METHOD AND APPARATUS FOR THE IGNITION OF A SOLID FUEL AND A SINTERABLE MIXTURE

摘要

A method and apparatus for igniting a sintering mixture consisting of a solid fuel and a sintering product, includes a sintering machine, the sintering mixture passes under an ignition furnace having closed end and lateral walls and a closed roof, hot waste gases are produced in the ignition furnace above the sintering material; the hot waste gases heat and ignite the surface of the sintering material by radiation and convection, rapid, uniform and economical ignition is achieved in that, in the upper part of the ignition furnace, the waste gases are supplied from one or more approximately stoichiometrically operated burners, and in that the gases supplied to the lower part of the furnace contain increased amounts of oxygen, in such a manner as to provide a furnace atmosphere which is hotter and lower in oxygen in the upper part of the ignition furnace, and is cooler and higher in oxygen in the lower part thereof, in a variant, the ignition procedure is improved by the use of a heat insulating hood.