The invention discloses a production technology for an
autoclaved aerated concrete building block. The production technology is characterized in that the material formula comprises, by weight, 65% of
fly ash, 15% of
cement, 14% of
lime, 5.5% of
phosphogypsum and 0.5% of aluminum
powder. The production technology comprises the following steps: firstly, slurries are prepared, namely,
fly ash is ground by utilization of a ball
grinding mill to prepare a
fly ash slurry,
phosphogypsum is added with water, then stirring is carried out for 1h, a
phosphogypsum slurry is prepared, and then
lime is crushed and ground to
lime powder by utilization of the ball
grinding mill; secondly, blending and stirring are carried out, namely, all the materials are sent to a
casting mixer, the
casting mixer is started, stirring is carried out and a concrete
slurry is obtained; thirdly,
casting and die entering are carried out, namely, all the concrete slurry in the casting mixer is placed in a die, and casting is carried out; fourthly, namely, a
green body is thickened and condensed gradually; fifthly,
cutting is carried out, namely, the shaped
green body is
cut according to a designed size; sixthly, autoclaved curing is carried out, namely, the
cut green body is sent to an autoclaved curing kettle for autoclaved curing, and a finished product aerated concrete building block is obtained.