▎ 摘　　要

NOVELTY - Preparing modified environmentally-friendly slurry comprises (i) freeze-drying 50-70 pts. wt. bentonite to removes water, crushing the lyophilized bentonite, grinding the crushed blocky bentonite, sieving, and taking the sieved bentonite powder, (ii) adding 15-20 pts. wt. sodium sulfate into the bentonite powder, adding 10-15 pts. wt. carboxymethyl cellulose, and stirring, and reacting for 1-2 hours to obtain sodiumized carboxymethyl cellulose-bentonite, and (iii) adding 15-20 pts. wt. graphene oxide into the sodiumized carboxymethyl cellulose-bentonite, and ultrasonically stirring for 1-2 hours, and stirring evenly to obtain preliminary modified mud liquid, and (iv) adding 8-12 pts. wt. nano titanium dioxide into the preliminary modified mud liquid, first dispersing the nano-titanium dioxide with 8-12 pts. wt. deionized water in ultrasound, then adding into the preliminary modified slurry, and stirring. USE - The method is useful for preparing modified environmentally-friendly slurry. ADVANTAGE - The method: utilizes cheap nano-titanium dioxide; and has low manufacturing cost. The prepared modified environmentally-friendly slurry is low cost; and has high slurry rate, small water separation rate, and high volume expansion times. DETAILED DESCRIPTION - Preparing modified environmentally-friendly slurry comprises (i) freeze-drying 50-70 pts. wt. bentonite to removes water, crushing the lyophilized bentonite, grinding the crushed blocky bentonite, sieving, and taking the sieved bentonite powder, (ii) adding 15-20 pts. wt. sodium sulfate into the bentonite powder, adding 10-15 pts. wt. carboxymethyl cellulose, and stirring evenly at a temperature of 40-50 degrees C, stirring while raising the temperature, stirring for 1-2 hours when the temperature reaches 40-50 degrees C, and reacting for 1-2 hours to obtain sodiumized carboxymethyl cellulose-bentonite, and (iii) adding 15-20 pts. wt. graphene oxide into the sodiumized carboxymethyl cellulose-bentonite, and ultrasonically stirring for 1-2 hours, and stirring evenly to obtain preliminary modified mud liquid, and (iv) adding 8-12 pts. wt. nano titanium dioxide into the preliminary modified mud liquid, first dispersing the nano-titanium dioxide with 8-12 pts. wt. deionized water in ultrasound, then adding into the preliminary modified slurry, then stirring at a high temperature of 200 plus minus 20 degrees C, stirring for 3-5 hours, and warming for 1-2 hours after stirring.