Dry mix for treating refractory substrates and process using same

摘要

Dry mix for treating refractory substrates, comprising combustible particlesof at least one oxidizable substance which, in the presence of oxygen, gives riseto an exothermic reaction, and particles of at least one other substance, whereinthese particles form together, during said exothermic reaction, a coherentmass capable of adhering to and/or interacting with the treated substrate, characterizedin that it comprises, as particles of at least one other substance, particlesof at least one expanding substance, in that the dry mix without the particlesof this at least one expanding substance has a first bulk density and in that themix comprising said at least one expanding substance has a second bulk densitylower than said first bulk density.