Fly ash slag preprocessing system and preprocessing technology thereof

The invention discloses a fly ash slag preprocessing system which comprises a fly ash slag screening machine, a fly ash slag stock bin, a fly ash slag pre-wetting bin, a mixing bin and a finished product bin which are connected in sequence, and further comprises a machine-made sand screening machine and a machine-made sand stock bin which are connected with the mixing bin in sequence, and the screening particle size of the fly ash slag screening machine and the screening particle size of the machine-made sand screening machine are both smaller than or equal to 2.36 mm. The pre-processing technology comprises the following steps: (1) adding fly ash slag into a fly ash slag screening machine, screening, and feeding into a fly ash slag bin; (2) feeding the fly ash slag into a fly ash slag pre-wetting bin, spraying with clear water, and feeding into a mixing bin; (3) adding the machine-made sand into a machine-made sand screening machine, screening, and feeding into a machine-made sand bin; and (4) feeding the ma