Process Research on Preparation of White Carbon Black from the Acid Leaching Solution of Stone Coal Vanadium Ore

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.