Abstract: Taking the unit No.7 of Henan Zhongfu Industry Corporation Limited as an example, the technical requirement of furnace refractory belt design for power plant boiler was introduced. The technical reformation of furnace refractory belt of power plant boiler and relevant construction technology were expounded. This technical reformation is suitable for the boilers, in which the input flow of desuperheating water is smaller and the steam temperature adjustment is difficult. After the reformation, the input flow of desuperheating water was increased, the slagging in furnace was mitigated, and the effect of the main steam temperature adjustment became better.

Key words: power plant boiler, furnace refractory belt, input flow of desuperheating water, technical reformation