by creating a vortex through separate injection inlets rather than confining walls used in the prior art to create a vortex carbon black produced by this reactor is characterized by high structure or low structure with low surface area a process for the manufacture of carbon black using the new reactor is also disclosed application_number US 72742903 A description with reference to the accompanying drawing fig1 is a schematic diagram of a typical conventional tangentially fired tread reactor 1 feedstock is injected through inlet 2 to tangential chamber 3 wherein a tangential fuel 4 is injected through tangential port 5 the resulting product is discharged to quench chamber 6 to quench ports 7 and product is collected and converted to conventional pelletizing system through 8 to obtain pellets which are dried and packed fig2 is schematic diagram of another conventional axial tread reactor 10 having one entry of the combustion gases 14 fuel is injected through fuel inlet at one end 11 a stream of air in injected through an inlet 13 and the feedstock is injected into chamber 16 through ports 15 reaction products are processed through a reaction chamber 17 and to a quench chamber 18 and quenched with water end product is collected through ports 19 and converted to conventional.