General working environment of steel grate bar：

1. large temperature change: during sintering, the temperature of sinter is as high as 1100 ℃, and the temperature of steel grate bar is generally 800-1000 ℃; After unloading, the temperature in the air rapidly drops to 100-300 ℃.

2. gas corrosion: oxidation and corrosion of CO, CO2, SO2 and steam in atmosphere

3. high temperature bearing: it bears the gravity of sinter during high temperature sintering.

3. impact and friction wear of sinter: impact and friction wear of sinter during loading and unloading.

4. erosion of high-temperature and high-speed powder gas two-phase flow.