Superfine composite mineral admixture grinding aid and preparation method thereof

The invention discloses a superfine composite mineral admixture grinding aid and a preparation method thereof. The superfine composite mineral admixture grinding aid comprises the following raw materials: 20-40wt% of modified polyhydroxy hydramine, 20-40wt% of sugar, 1-10wt% of inorganic salt and the balance of water. The preparation method of the modified polyhydroxy alcohol amine comprises the following steps: adding 20-30wt% of alcohol amine, 30-50wt% of acid anhydride and 20-40wt% of alcohol into a reaction container, uniformly stirring, heating to 105-120 DEG C, carrying out heat preservation reaction for 1-2 hours, and cooling to obtain the modified polyhydroxy alcohol amine. The superfine composite mineral admixture grinding aid is specially researched and developed by taking various properties and characteristics of the superfine composite mineral admixture, such as physical and chemical properties, particle size distribution, components and the like, as research objects, the specific surface energy o