Method for preparing a silica embedded carbon black composite aggregate and composite aggregate prepared thereby

A method for preparing a silica embedded carbon black composite aggregate comprising:

• a) feeding an oxidative gas, silica precursor and carbon black feedstock to a mixing chamber of a reactor assembly;
• b) mixing the oxidative gas, silica precursor and carbon black feedstock in the mixing chamber to obtain a pre-mixed blended feedstock;
• c) injecting the pre-mixed blended feedstock into a flame burner of the reactor assembly, said flame burner being operably connected to the mixing chamber;
• d) generating heat of combustion through partial oxidative burning of the pre-mixed blended feedstock to attain reactor thermal conditions;
• and
• e) cracking the pre-mixed blended feedstock to produce in-situ formed silica embedded carbon black composite aggregate,
• wherein weight percent of the embedded silica particle in the composite aggregate is in a range of from about 30% to about 60%, and
• wherein weight ratio of the silica-precursor to the carbon black feedstock in the step a) is from 0.12 to 0.259.