▎ 摘　　要

NOVELTY - Preparing selenium-graphene composite isostatic pressing graphite material comprises (i) obtaining each component that satisfies the index condition, the component comprises aggregate with a particle size of 1-45 mum, powder with a particle size of 5-40 mum, binder, impregnating agent, and reduced selenium powder, where aggregate is asphalt coke, and powder comprises graphene, carbon black and graphite powder, (ii) mixing aggregate and powder to make mixed powder A that has passed vibrating screen, (iii) primary pre-forming and process treatment, processing the mixed powder A, (iv) mixing the mixed powder A1 and selenium powder to prepare mixed powder that has passed vibrating screen A2, (v) preforming for second time, placing the mixed powder A2 into kneading pot, and performing second preforming, (vi) isostatic pressing and processing, placing mixed powder A3 into rubber mold, sealing, and forming by cold isostatic pressing, and (vii) performing graphitization treatment. USE - The material is useful as soft material used in industry. ADVANTAGE - The material: has uniform and exquisite structure, high volume density, excellent physical and chemical index, enhanced conductivity and mechanical strength, small abrasion, high temperature resistance, strong thermal conductivity, excellent corrosion resistance effect, and improved service life and stability. DETAILED DESCRIPTION - Preparing selenium-graphene composite isostatic pressing graphite material comprises (i) obtaining each component that satisfies the index condition, the component comprises aggregate with a particle size of 1-45 microm, powder with a particle size of 5-40 micrommum, a binder, an impregnating agent, and reduced selenium powder, where the aggregate is asphalt coke, and the powder comprises graphene, carbon black and graphite powder, (ii) mixing aggregate and powder to make mixed powder A that has passed vibrating screen, where raw material comprises 50-60 wt.% asphalt coke, 15-20 wt.% graphene powder, 10-15 wt.% carbon black powder and 10-15 wt.% graphite powder, and naturally cooling the mixture, (iii) primary pre-forming and process treatment, processing the mixed powder A by the process of pressing-calcining-impregnation-secondary calcining, crushing the obtained roasting body B and then crushing to make the mixed powder A1 of the vibrating screen, (iv) mixing the mixed powder A1 obtained in the step (iii) and selenium powder obtained in the step (i) to prepare a mixed powder that has passed the vibrating screen A2, where raw material comprises 90-95 wt.% mixed powder A1, and 5-10 wt.% selenium powder, and naturally cooling the mixture to room temperature, (v) preforming for second time, placing the mixed powder A2 into kneading pot, and performing second preforming after forming a paste through a dry mixing-wet mixing process, crushing second pre-pressed blank and grinding into a mixed powder A3 that has passed the vibrating screen, where in the wet mixing process, mixing the mixed powder A2 with the binder, where raw material comprises 70-75 wt.% mixed powder A2 and 25-30 wt.% binder, (vi) isostatic pressing and processing, placing mixed powder A3 into rubber mold, sealing, and forming by cold isostatic pressing, forming isostatic pressing blank body, then subjecting the isostatic pressing blank body to the procedures of roasting-impregnation-secondary roasting-secondary impregnation-three roasting to form a roasting green body B1, where the secondary impregnation is to use liquid selenium with a purity of 99% as an impregnating agent to be added to the calcined body of the previous process, and (vii) performing graphitization treatment by placing calcined body B1 prepared in the step (vi) into a graphitization furnace, converting two-dimensional structure carbon products into three-dimensional graphite grid structures, and forming the finished product. An INDEPENDENT CLAIM is also included for a selenium-graphene composite isostatic pressing graphite material prepared by the above-mentioned method.