The invention provides a method for producing aerated concrete by using water
quenching copper tailings being subjected to
copper selection iron extraction, wherein the process comprises 1,
raw material breaking
grinding, 2, pulping, 3, material preparing stirring, 4,
casting, 5, static gas forming, 6,
cutting, 7,
autoclave curing, and 8, discharging out of the kettle and packaging. According to the method, water
quenching copper tailings of copper
smelting plant is subjected to second copper selections through a flotation process,
magnetic separation iron extraction is performed through a
rotary kiln high temperature reduction
calcination process to obtain a copper
tailings ore pulp, and 35-40% by weight of the conveyed tailings ore pulp, 45-50% by weight of silica sand
mortar, 10-15% by weight of
lime slurry and 3-5% by weight of
cement are directly conveyed into a stirring tank according to a certain weight percentage ratio so as to be subjected to mixing stirring without the
dehydration and
grinding treatment process, wherein the concentration is 55-60%, the curing pressure is 1.3 MPa, the curing temperature is 180-200 DEG C, and the
curing time is 8 h. According to the present invention, the environmental
pollution problem caused by the copper tailings accumulation is released, the produced aerated concrete building block meets the standard requirement, the production cost is low, the product
drying shrinkage value is low, and the comprehensive utilization of the resources and energy-saving emission-reducing are achieved.