METHOD AND INSTALLATION FOR THERMAL TREATMENT OF SEROMIC-CONTAINING ORE

摘要

The invention relates to a method of heat treatment of sulfur-containing ore, in which the ore is calcined at temperatures from 600 to 1200 ° C in the presence of oxygen in the reactor so that from 1 to 90 wt.% Sulfur contained in the ore is burned to sulfur dioxide, and the impurities contained removed in gaseous form. The resulting waste gas containing sulfur dioxide is fed to a gas purification system comprising at least one component, and / or the burnt ore is fed to at least one additional process stage. The exhaust gas from the gas cleaning and / or the specified process stage and / or the gas used for cooling during gas cleaning or for cooling in an additional process stage is at least partially returned back to the reactor as recycle gas having a temperature of 100 ° C.