Abstract: A cyclonic, multiple vortex type fuel burner having a combustion chamber with a closed curved end, with the main fuel and auxiliary fuel and air being tangentially injected into the chamber adjacent to the curved end creating a circular oriented combustion of the fuel, with the air being injected at varying quantities along the length of the combustion chamber, all to provide a controlled temperature in the burner chamber that burns all the combustible materials in the fuel and turns the non-combustible materials into dry slag or wet slag without burning the refractory materials forming the combustion chamber. The burner feeds a volume of air and fuel through fixed openings into the combustion chamber to provide a preset fuel/air ratio disribution along the length of the combustion chamber. This fuel/air ratio is subject to change with changes in the amount or density of fuel fed to the burner.