Comprehensive utilization method of electrolytic manganese residues and demanganized building material

The invention relates to a comprehensive utilization technology of industrial solid wastes, in particular to a comprehensive utilization method of electrolytic manganese residues and a demanganized building material. The method comprises the following steps: S1, desalting the electrolytic manganese residues; s2, deaminating the desalted manganese slag; s3, selecting manganese from the deaminated manganese slag; and S4, preparing the building material from the demanganized slag. According to the method, ammonia is removed by adopting water washing desalination, alkaline volatilization and wet magnetic separation, and ammonia, magnesium and manganese in the electrolytic manganese residues can be recovered at the same time. And meanwhile, the building material is prepared from the demanganized waste residues, calcium sulfate in the electrolytic manganese residues is fully utilized, the electrolytic manganese residue building material is prepared by adopting a super sulfate cement principle, and zero emission of