| 摘要 |
<p>PROBLEM TO BE SOLVED: To produce a readily producible formed product of hydrosodalite having high reactivity with hydrogen chloride gas without collapsing even when brought into contact with a combustion gas at high temperatures and high speeds and to provide a method for producing the formed product of the hydrosodalite. SOLUTION: This formed product of hydrosodalite is produced by adding water to a clay mineral having the plasticity as a raw material, forming the resultant mixture by a means such as compression, extrusion or granulation, then carrying out the drying and baking, providing a raw material formed product, adding caustic soda or sodium carbonate and water to the resultant raw material formed product and conducting heat treatment thereof. The method for producing the formed product of the hydrosodalite is provided. In this case, a mineral consisting essentially of silica or alumina such as a kaolin mineral or smectite is used as the clay mineral having the plasticity. The clay mineral is further mixed with a material selected from quartz sand, fly ash, water glass, a volcanic rock glass, diatomaceous earth, coal ash and aluminum hydroxide to afford the raw material.</p> |
