HIGH-TEMPERATURE ACIDIC GAS IMMOBILIZING AGENT

PROBLEM TO BE SOLVED: To provide a high-temperature acidic gas immobilizing agent which drastically lessens the generation and resynthesis of dioxin by efficiently immobilizing and removing the acidic gas of the high temperature into which the carbon dioxide discharged from an incinerator, etc., is included. SOLUTION: The high-temperature acidic gas immobilizing agent prepared by mixing a compound containing at least >=2 kinds of metal elements as a first metal source and second metal source with a compound containing silicon in such a manner that these metallic elements are mixed is adopted as basic means. The molar ratio of the silicon is so set as to exist in a range from 0.9 to 0.05, the molar ratio of the first metal source from 0.9 to 0.05 and the molar ratio of the second metal source from 0.9 to 0.05. One or plural kinds of the elements selected from Na, K, Ba, Ca, Mg, Mn, Zn, Al and Fe are used as the metal elements to be included in the first metal source and the second metal source. The high-temperature acidic gas immobilizing agent described above is provided in the form of powder, granule or slurry.