Method for preparing Portland cement clinker from mineral waste

The invention relates to the technical field of cement clinker preparation, in particular to a method for preparing Portland cement clinker from mineral waste, a base is included, a second-stage cooling mechanism used for conducting second-stage cooling on the clinker is arranged on the upper surface of the base, and a mounting support is arranged on the second-stage cooling mechanism; the first-stage cooling mechanism is used for carrying out first-stage cooling on the clinker, the first-stage cooling mechanism is arranged on the inner side of the mounting support, a discharging hopper used for conveying the clinker obtained through calcination is arranged on the first-stage cooling mechanism, and the first-stage cooling mechanism comprises a first-stage cooling box fixedly connected to the inner side of the mounting support; the caked clinker is crushed when the clinker obtained through calcination is cooled through the first-stage cooling mechanism, the clinker can be heated more sufficiently in the coolin