The invention discloses a
system and method for preparation of a building 3D printing material from mineralized refuse. The method includes the steps of: 1) putting mineralized refuse, aluminum ash,
carbide slag and water into a homogenization
pool according to a set ratio to be blended into a paste, conducting heating homogenization, and the homogenization time at 2-4h; 2) conducting pressure
filtration on the homogenized material, and performing
drying to obtain a mixed material, heating desulfurized
gypsum for
dehydration to convert it into semi-hydrated
gypsum; 3) mixing the mixture and the semi-hydrated
gypsum evenly in ratio, and then performing
powder grinding; 4) calcining the ground material, adding pulverized
coal into the mixture during
calcination to perform
oxygen-enriched
combustion so as to obtain a 3D printing material precursor, wherein the mineralized refuse, aluminum ash,
carbide slag and desulfurized gypsum are in a
mass ratio of 7-15:30-45:30-45:15-20; and 5) mixing the 3D printing material precursor, desulfurized gypsum and limestone in certain ratio and performing
grinding, then conducting compounding with fine aggregate, an admixture, a
water reducer, a composite coagulation
regulator and a stabilizer, thus obtaining the building 3D printing material.