초록 ▼

The invention pertains to an entrained-downflow chlorination process of fine metalliferous ores particularly containing alkali and/or alkaline earth metals greater than about 0.3% by weight as the oxide. The process includes a quenching step following the chlorination step where the chlorinated prod

The invention pertains to an entrained-downflow chlorination process of fine metalliferous ores particularly containing alkali and/or alkaline earth metals greater than about 0.3% by weight as the oxide. The process includes a quenching step following the chlorination step where the chlorinated products are quenched by liquid cooling fluid spray patterns adapted to prevent solidification of the alkali and/or alkaline earth materials onto the reactor walls. The chlorinator unit of this invention prevents disruption of the chlorination process due to presence of liquids or sticky particles and it contains a quenching spray means disposed below the chlorination zone in the entrained-downflow chlorinator unit, whereby the quenching sprays prevent reactor wall buildup.

대표청구항 ▼

A process for chlorinating metalliferous ores containing oxide materials including alkali or alkaline earth materials, the process comprising: providing a downflow chlorinator having an upper chlorinating zone and a lower quenching zone; introducing a feed stream into said chlorinator for downward f

A process for chlorinating metalliferous ores containing oxide materials including alkali or alkaline earth materials, the process comprising: providing a downflow chlorinator having an upper chlorinating zone and a lower quenching zone; introducing a feed stream into said chlorinator for downward flow, said feed sream comprising metal oxide materials, carbon materials, and a chlorine gas source; chlorinating said metal oxide materials within the chlorinating zone in an entrained-downflow chlorination reactor in the presence of carbon at temperatures above about 800°C. to substantially chlorinate said metal oxide materials including the alkali or alkaline earth materials to produce down-flowing chlorinated products including alkali or alkaline earth chlorides; quenching the down-flowing chlorinated products within a lower quenching zone with a cooling fluid being sprayed into the downflowing chlorinated products to produce quenched chlorinated products including solid alkali or alkaline earth chlorides, said chlorinated products entering said quenching zone being quenched by liquid cooling spray in the quenching zone, said liquid cooling spray evaporated by contact with said chlorinated products before reaching the walls of said quenching zone to prevent said chlorinated products from collecting on the said walls; and removing the solid alkali and alkaline earth chlorides from the chlorinated products.