Abstract: According to the characteristics of high silicon content in acid leaching solution of stone coal containing vanadium, the silicon was removed by flocculation and sedimentation through the use of non-ionic flocculant, in the process, vanadium loss rate was less than 1%. Then the white carbon black was prepared by a process consisting of washing, drying and calcining. The SiO₂ content in the product is 94.32%, the specific surface area is 265m2/g, oil absorption value is 2.62ml/g, the main performance indicators accord with national standard of HG/T 3061-2009.