Method for preparing graphene with anthracite as raw material

The invention relates to a method for preparing graphene with anthracite as a raw material. The method comprises the steps of 1 graphitization, wherein the anthracite is put into a graphitization furnace, and coal-based graphite is prepared; 2 graphite oxidization, wherein the coal-based graphite prepared in the step 1 is mixed with acid in an ice-water bath, an oxidizing agent and a surface modification agent are added, even stirring is carried out, a mixture is obtained, the obtained mixture is heated to be 45 DEG C to 95 DEG C and is continuously stirred for 0.5 h to 2 h, then deionized water is added for hydrolysis, hydrogen peroxide is added after the reaction is stable, filtering is carried out to obtain a filter cake, the obtained filter cake is washed till the content of acid radical ions of acid added to the filter cake is not larger than 100 ppm, the washed filter cake is dried, and graphite oxide is obtained; 3 graphite reduction, wherein the graphite oxide prepared in the step 2 is reduced, and gr