Combustion burner and method for maintaining combustion burner

A combustion burner comprising:

• a fuel nozzle configured to blow in fuel gas that is a mixture of solid filet and air;
• a combustion air nozzle configured to blow in air from outside of the fuel nozzle;
• at least one flame stabilizer having a wide width part whose width increases in a direction toward a distal end of the fuel nozzle, the flame stabilizer being arranged on the axial center side at the distal end of the fuel nozzle;
• and
• a straightening vane having a plate shape, the straightening vane being arranged on an extension of the flame stabilizer on the upstream side in a flow direction of the fuel gas, wherein
• an abrasion-resistant member is arranged on the wide width part of the flame stabilizer,
• an abrasion-resistant member is arranged on at least a part of the straightening vane, and
• the straightening vane has a surface parallel to the flow direction of the fuel gas, and the abrasion-resistant member is arranged in at least an area of the surface, the area being not greater than 50% of the overall length of the straightening vane from an end surface of the straightening vane located on the upstream side of the straightening vane in the flow direction of the fuel gas.