Preparation method of bentonite drying agent

The invention discloses a preparation method of a bentonite drying agent. The preparation method comprises steps of air-curing, crushing, mixing, stirring, extruding, modifying, drying, dispersing, screening and packaging. According to the preparation method, sedimentary rock calcium-based bentonite with blue absorption power more than or equal to 36g/100g is adopted, the highly purification is not needed, after bentonite crude ore is air-cured and crushed, additives and water are uniformly mixed with the crushed bentonite crude ore to obtain a mixture, the mixture is extruded and modified to obtain a drying agent semi-finished product, and then the drying agent semi-finished product is shaped, dried, screened and packaged to obtain a bentonite drying agent finished product. The bentonite raw material adopted in the preparation method is non-toxic, odorless and non-corrosive, the chemical performance is stable, no pollution is produced for the environment, the prepared bentonite drying agent is recyclable, the wet absorption property is good, the cost is low, the production process is continuous, and mass production can be realized.