The invention discloses
calcium-based heat storage particles as well as a preparation method and application thereof. The heat storage particles are prepared from the following raw materials in percentage by
mass: 60 to 90 weight percent of limestone
powder, 2 to 30 weight percent of aluminum
cement, 2 to 30 weight percent of
manganese sand and 6 to 20 weight percent of pore forming agent, the use amount of the binder is 20-40 ml per 100 g of the raw materials. The preparation method comprises the following steps: mixing the limestone
powder, the aluminum
cement, the
manganese sand and the pore-forming agent, performing ball milling, adding the binder, uniformly mixing to obtain
slurry, and preparing spherical particles; calcining the spherical particles in an
air atmosphere, carbonating the spherical particles in a CO2
atmosphere, heating the spherical particles to a preset heat treatment temperature, keeping the temperature, and cooling and carbonating the spherical particles again to obtain finished particles. The heat storage particles provided by the invention have abundant pore structures and a skeleton formed by the high-temperature-resistant
metal oxide, so that the particles have excellent cycle stability and good
compressive strength.