Method for modifying waste tire pyrolysis carbon black by sulfamic acid

The invention relates to the technical field of carbon black cracking, and discloses a method for modifying waste tire cracking carbon black by sulfamic acid, which comprises the following steps: mixing carbon black, a sulfamic acid solution and a dispersing agent for pickling, and after pickling is completed, sequentially carrying out suction filtration, washing and drying on the pickling mixed solution to complete cracking. Sulfamic acid (NH2SO3H) is used for acid pickling modification, sulfamic acid is solid acid which is low in price, easy to obtain and good in stability in organic synthesis, has a good catalytic effect on esterification reaction with acid and is not prone to corroding equipment, sulfamic acid reacts with carbonaceous sediment on the surface layer of cracked carbon black, the sulfamic acid and carbonaceous sediment make full contact with each other through strong stirring, and therefore the catalytic effect of the cracking carbon black is improved. Undissolvable impurities on the surface