The invention discloses a process method for preparing sintered pavement bricks by low-temperature slow firing, which is characterized in that mill
tailings and clay auxiliary materials are used as main raw materials, the main components of the
tailings are
quartz and
feldspar, the content of the
feldspar is not less than 30%, and the auxiliary materials contain at least one clay mineral of
kaolinite,
chlorite and
montmorillonite; mixing the
tailings and auxiliary materials according to the weight ratio of (6: 4)-(9: 1), and adding water and a fluxing agent to obtain a mixture, wherein the fluxing agent is selected from industrial
solid wastes such as boric
sludge,
lithium slag or
spodumene tailings; pressing and forming the mixture to obtain a
green body,
drying the
green body to constant weight, finally
sintering by adopting a low-temperature slow
sintering process, controlling the
sintering temperature at 900-1000 DEG C, and cooling along with a furnace after heating and heat preservation stages to obtain a finished product. According to the invention, industrial
solid waste is used as a
raw material, and the sintered pavement
brick with the
compressive strength reaching the standard is prepared while the
energy consumption is reduced through an optimized
raw material ratio and a low-temperature sintering process, so that the unification of
solid waste recycling,
energy conservation and consumption reduction and high performance of a product is realized.