▎ 摘　　要

NOVELTY - Preparing low-loss graphite electrode involves weighing raw materials, 30-32 pts. wt. petroleum coke, 20-25 pts. wt. needle coke, 10-12 pts. wt. coal pitch, 5-7 pts. wt. beta-silicon carbide, 2-3 pts. wt. graphene, 0.5-0.7 pts. wt. fatty alcohol polyoxyethylene ether, 0.5-0.8 pts. wt. sodium methylnaphthalenesulfonate, 0.5-0.8 pts. wt. calcium oxide, 0.5-0.7 pts. wt. aluminum oxide, 0.5-0.7 pts. wt. rhenium carbide, 1-3 pts. wt. copper powder. The raw material in solid form is crushed and sieved to powder with particle size of 30-50 nanometer, and petroleum coke, needle coke, copper powder, graphene and beta-silicon carbide are thoroughly mixed to form mixture A. The mixture A is placed into the reaction kettle, and pass 5-8% ethanol gas of A mass in the reaction kettle, and stirred the reaction at 350-450 degrees C for 3-5 hours to obtain reactant B. USE - Method for preparing low-loss graphite electrode. ADVANTAGE - The method enables to prepare low-loss graphite electrode that has high melting point and elastic coefficient, good electrical and thermal conductivity, better impact performance, improves strength of graphite electrode, and reduces breakage rate. DETAILED DESCRIPTION - Preparing low-loss graphite electrode involves weighing raw materials, 30-32 pts. wt. petroleum coke, 20-25 pts. wt. needle coke, 10-12 pts. wt. coal pitch, 5-7 pts. wt. beta-silicon carbide, 2-3 pts. wt. graphene, 0.5-0.7 pts. wt. fatty alcohol polyoxyethylene ether, 0.5-0.8 pts. wt. sodium methylnaphthalenesulfonate, 0.5-0.8 pts. wt. calcium oxide, 0.5-0.7 pts. wt. aluminum oxide, 0.5-0.7 pts. wt. rhenium carbide, 1-3 pts. wt. copper powder. The raw material in solid form is crushed and sieved to powder with particle size of 30-50 nanometer, and petroleum coke, needle coke, copper powder, graphene and beta-silicon carbide are thoroughly mixed to form mixture A. The mixture A is placed into the reaction kettle, and pass 5-8% ethanol gas of A mass in the reaction kettle, and stirred the reaction at 350-450 degrees C for 3-5 hours to obtain reactant B, reduce B to 100-150 degrees C. The fatty alcohol polyoxyethylene ether, sodium methylnaphthalene sulfonate, calcium oxide, carbonized carbide and aluminum oxide are added, and mixed thoroughly. The coal pitch is added to make paste graphene fiber, then kneaded in molding machine. The semi-finished products obtained after kneading and molding are roasted, temperature is naturally cooled after the roasting, and graphite electrode baked products are obtained after kept for 72 hours. The obtained graphite electrode baked product is completely immersed in an ionic solution and allowed to kept for 48-72 hours, and then dried, the ionic solution is 5-10mol/L zinc chloride solution. The dried roasted product is placed into the graphitization furnace, and graphitized the roasted product according to the power transmission curve. The temperature of the graphitization furnace is heated to 3300-3500 degrees C and cooled, maintenance time is controlled at 300-320 hours to obtain finished graphite electrode.