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Boiler Steel Accessories (Stove Bars)
Fire Bar
Grate bars are a crucial component in a boiler's combustion system, supporting fuel (such as coal or firewood) and distributing it evenly to ensure efficient combustion.
Material and Structure
Grate bars are typically made of cast iron (such as HT250) or heat-resistant steel, offering high-temperature resistance and deformation resistance. They consist of a frame and the grate bar body. The frame is a rectangular block with a square hole in the middle and small holes at each end for securing the bars.
Function and Use
They are primarily used in the combustion chamber of coal-fired boilers, optimizing the combustion space by properly distributing the fuel layer and reducing the risk of localized overheating or flameout. Some models can be customized to suit different combustion requirements.
Common Material Options
Heat-resistant steel: resistant to deformation at high temperatures (such as 4Gr10Gi2Mo and GX40CrNiSi27-4), but relatively expensive.
Cast iron: Cost-effective and can be used directly after cleaning the flash, but the upper temperature limit should be noted.