High-performance grinding aid for superfine composite mineral admixture and preparation method of high-performance grinding aid

The invention discloses a high-performance grinding aid for a superfine composite mineral admixture and a preparation method of the high-performance grinding aid. The grinding aid is prepared from the following components in percentage by weight: 35 to 50 percent of polyamine carboxylic acid polymer, 5 to 15 percent of modified nano silicon dioxide, 15 to 30 percent of polyol derivative and 15 to 30 percent of alcohol amine derivative. According to the invention, a synergistic grinding-aiding combination is formed by utilizing the adsorption and dispersion effects of the multi-amino carboxylic acid polymer, the particle skeleton and multi-grading filling effects of the modified nano silicon dioxide, the crack permeation effects of the polyol derivative and the alcohol amine and the charge neutralization and polymerization inhibition effects of polar groups such as amino, hydroxyl and carboxyl in each component; compared with a traditional grinding aid, extrusion, crushing and dispersion of particles are facil