METHOD FOR SEPARATING POISONOUS, VOLATILE CHEMICAL COMPOUNDS FROM MIXTURES OF SOLID PARTICLES WITH A SIZE SMALLER THAN 200 MICRONS

摘要

To separate toxic volatile chemical compounds from a mixture (7) of solid particles having a particle size of up to 200 mu m, the mixture is heated continuously or intermittently at a mean rate of 5 to 200 DEG C/minute in zones of successively rising temperature up to 1350 DEG C and the toxic chemical compounds are vaporised and force to leave the reaction space (6). The toxic compounds are then condensed and discharged. The unvaporised residue is then successively fused and the melt (8) is continuously or intermittently discharged from the reaction space (6) and caused to solidify. The particles entrained in the gas phase are preferably retained by a hot-gas filter, liquified and passed into the melt. ……