Fecha de publicación: 28/07/2020 Fuente: WIPO "circular economy" The invention discloses a method for preparing dry-mixed mortar by replacing natural sand with industrial waste residue nickel slag. Industrial waste residue nickel slag discharged by nickel product production enterprises is utilized, after mechanical residue screening, 80-100 parts by weight of waste residue nickel slag and 10-25 parts by weight of 425 ordinary cement are stirred and mixed uniformly to obtain a mortar product, namely the dry-mixed mortar, and the dry-mixed mortar can be widely applied to mortar products such as ground mortar, waterproof mortar, internal and external wall interface mortar and the like in industrial and civil construction engineering construction. The quality of the dry-mixed mortar product exceeds that of a natural sand dry-mixed mortar product, the dry-mixed mortar product has the characteristics of efficient resource utilization, energy conservation and emission reduction, secondary pollution is avoided, the cost of natural sand, land resources and the like is saved by 100%, and the production cost is reduced.