Process for incinerating waste products at a controlled temperature

Process for incinerating waste products in a furnace in which a comburent and sprayed water are injected into the furnace, characterized in that the introduction of the waste products in the furnace is effected by successive charges and comprises, for each charge of waste products, the following steps:

• lowering the temperature of the hearth to around 650.degree. C.,
• introducing the charge to be incinerated,
• injecting oxygen at least in the zone located between the charge and 20 cm above the latter, preferably at sonic speed so as to immediately oxidize the carbon and the oxygen formed by cracking the pyrolysis gas above about 450.degree. C., the presence of oxygen very rapidly producing a rise in temperature of the hearth above 750.degree. C., beyond which temperature the carbon monoxide which could be possibly formed is immediately oxidized in the form of carbon dioxide, water being vaporized when the temperature in the furnace becomes higher than about 750.degree. C., by spraying by means of oxygen in such manner, on one hand, as to produce active oxygen by thermal cracking and accelerate the oxydation of C, CO and H and, on the other hand, as to maintain a temperature in the furnace which does not become substantially higher than about 850.degree. C., by absorption of heat upon its vaporization.