Apparatus for treating fine ore

Metallurgical apparatus – With control means responsive to sensed condition – With means responsive to condition of treated material

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34576, 34591, 34592, 266157, C22B 110

Patent

active

058796185

ABSTRACT:
An apparatus for treating fine ore in which fine ore is dried by aid of a hot drying gas flowing around the ore particles. After having flown around the ore particles, the drying gas is purified while releasing entrained dust ore particles. The dust ore particles are collected and admixed to the dried fine ore. In order to avoid process disturbances in the further processing of fine ore due to excessive portions of dust ore particles present without the fine ore, drying is effected in the whirl-bed method under simultaneous wind-screening of the fine ore. The drying gas is passed through the fine ore under formation of a whirl bed and the speed of the drying gas is fixed at a rate at which entraining of dust ore particles having dimensions below a predetermined dimension is effected. The dust ore particles entrained in the drying gas are separated, collected and admixed to the dried fine ore in dosed amounts. The apparatus includes a fine ore whirl-bed drying means including a drying-gas feeding means. A drying-gas purification means receives the hot drying gas from the whirl-bed drying means. A separating means separates from the hot drying gas dust ore particles entrained by the drying gas. A first collecting vessel receives the dust ore particles separated from the hot drying gas. A mixing means mixes the dried fine ore and the dust ore particles separated from the drying gas to a predetermined quantitative ratio.

REFERENCES:
patent: 3578296 (1971-05-01), Boucraut
patent: 4571174 (1986-02-01), Shelton

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