Process for chlorinating volatilization of metals which are present in oxidic iron ores or concentrates

摘要

A process and apparatus is disclosed for the chlorinating volatilization of impurity metals detrimental to the production of iron from a raw material which contains the oxides of the impurity metals and iron or which forms them in an oxidizing atmosphere, in which the pulverous raw material is at a high temperature of 900 DEG C. or more and in an oxidizing atmosphere contacted with a magnesium chloride in order to chlorinate and volatilize the impurity metals. The preheated raw material and anhydrous magnesium chloride are fed into a fluidized bed on an inclined grate, hot air being fed into the bed through the grate in order to volatilize the chlorides of the impurity metals, and purified raw material is discharged from the lower section of the fluidized bed into a separate chamber, in which it is rinsed with an air flow the flow rate of which is substantially higher than that of the air flow fed into the fluidized bed.