| 摘要 |
Granular material, gaseous fuel and air are preheated to just below the sintering temperature of the granular material. The hot granular material is passed through a mold in which a reticular device for distributing the fuel is provided to define a conical or vaulted surface with its vertex upstream, extending across the cross-section of the mold and defining the upstream end of a combustion zone into which the granular material passes after entering the mold. Air is supplied through a perforated wall and pushes the granular material as well as advancing with it to the combustion zone. Combustion of the fuel in the combustion zone thus defined brings the granular material to the sintering temperature and a fused rod of cellular structure (i.e. with small enclosed voids, generally not communicating with each other) is continuously formed that is pulled out by rolls in a pre-cooling section of the apparatus immediately downstream of the mold. The granular material must be sinterable and is preferably ceramic, such as bloating clay or waste glass.
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