METHOD OF MANUFACTURING A SORBENT, A SORBENT OBTAINED BY SUCH METHOD, AND METHOD OF CLEANING A STREAM OF HOT GAS

摘要

The present invention relates to a method of manufacturing a sorbent suitabl e for removing a metal from a stream of hot gas out of a calcium and kaolin-containing raw material such as paper or other residues stemming from the production of paper and the recycling of waste paper. The raw material is thermally treated in a fluidized bed having a freeboard whereby the fluidized bed is operated at a temperature between 720 and 850 .degree.C and the temperature of the freeboa rd is 850 .degree.C or below so that the material is converted to a meta-kaolin containing substance forming the sorbent.