Burner for fuel combustion and combustion method therefor

A burner for fuel combustion, wherein the burner comprises a burner body extending in an axial direction, and a flame for heating a material being heated is formed at a front end face of the burner body, the burner body comprising:

• a primary oxidant-fuel delivery component, a secondary oxidant delivery component and a tertiary oxidant delivery component;
• wherein the secondary oxidant delivery component and tertiary oxidant delivery component are arranged at the same side of the primary oxidant-fuel delivery component, and the secondary oxidant delivery component is located between the tertiary oxidant delivery component and the primary oxidant-fuel delivery component;
• the primary oxidant-fuel delivery component comprises:
• at least one fuel supply channel for a fuel to flow through, one end thereof being provided with a fuel nozzle;
• and
• at least one primary oxidant supply channel for a primary oxidant to flow through, the primary oxidant supply channel being configured to surround an outer wall of the fuel supply channel, and one end thereof being provided with an annular nozzle surrounding the fuel nozzle;
• the secondary oxidant delivery component comprises at least one secondary oxidant supply channel for a secondary oxidant to flow through, one end thereof being provided with a secondary oxidant nozzle;
• the tertiary oxidant delivery component comprises at least one tertiary oxidant supply channel for a tertiary oxidant to flow through, one end thereof being provided with a tertiary oxidant nozzle.