Obtaining optimal CaO-lime reactivity for uniform extraction of H2 in the "gas-cellular" building block

Abstract

In this paper quicklime CaO used for the production of aerated blocks needs to have a specific reactivity in order to ensure that hydrogen H2 in "gas-cellular" building blok is released evenly. In the production of gas silicate, the agent used for the creation of pores is usually aluminum powder, which reacts with Ca(OH)2 to release hydrogen, which in turn causes the swelling of the material and the forming of pores. To generate quicklime CaO with a specific reactivity, it is necessary to accurately determine the rock mass, calcination temperature and residence time in the calcination zone during the calcination process. The theoretical and experimental method was used in the paper. The obtained results have been verified in practice and according to these CaO reactivity parameters, the XELLA company produces "gas-cellular" blocks.