Abstract: An apparatus is provided for fabrication of highly reactive calcium sorbents and/or binding materials, from powdered calcium carbonate and/or fly-ashes coming from coal combustion, especially in boilers with fluidised bed furnaces. A method is provided in which ashes with chemical by weight containing from 25% up to 45% SiO2, from 3% up to 25% Al2O3, from 10% up to 40% CaO, from 5% up to 15% SO3, beneficially with 51% addition of Portland cement or slag or clinker as activator, are beneficially pre-mixed with calcium carbonate and then the mixture or ashes are mechanically deagglomerated and activated through free particles collisions at the speed at least 8 m/sec. A device is provided including a container closed with cover and the chamber, in which the ashes inlet pipe is located centrally within the rotor axis and finished with the tapered, expanding down outlet.