Chain Grate News

Chain Grate News

what is boiler chain grate?

• By Alex Hu
• 01/08/2026
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A boiler chain grate is a moving, conveyor-belt-like metal floor inside an industrial furnace that feeds solid fuel, moves it through active combustion zones, and drops out the remaining ash. It is widely used for burning coal and biomass pellets in factories and power plants. How It WorksFuel feed: Solid fuel drops from a storage hopper onto the front of the moving metal chain link belt.Combustion zones: The continuous loop carries the fuel slowly past a hot brick arch that dries and ignites it.Air control: Fans blow air up through tiny gaps in the moving metal grate bars to feed oxygen to..

Technical Analysis of Active and Driven Grate Bars for Travelling Chain Grate

• By Alex Hu
• 01/08/2026
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 The travelling chain grate is the core fuel conveying and combustion equipment for medium and small coal-fired and biomass stoker boilers. The complete grate system is assembled by active grate bars (drive bars) and driven grate bars (follower bars) arranged alternately in series. The two types of bars differ completely in structure, stress principle and operational functions. With clear division of labor and coordinated operation, they jointly realize the full-process functions of fuel conveying, ventilation combustion, sealing, anti-leakage and slag removal. Their material selection, m..

Classification, Properties and Application Scenarios of Mainstream Grate Bar Materials

• By Alex Hu
• 01/08/2026
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Core Performance Requirements for Grate Bars Grate bars must feature high temperature resistance, thermal shock resistance, wear resistance, oxidation resistance and slag corrosion resistance. Ranked below in accordance with the most common applications in industrial boilers: I. Ordinary Cast Iron Series (First Choice for Small Atmospheric Coal-Fired Boilers at Low Temperatures, Best Cost Performance) 1. Grey Cast Iron (HT150 / HT200) Characteristics: Lowest production cost, easy casting, excellent thermal conductivity and self-lubricating wear resistance; high brittleness and poor hea..

Classification, Performance and Applications of Mainstream Grate Plate Materials

• By Alex Hu
• 31/07/2026
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Classification, Performance and Applications of Mainstream Grate Plate Materials   Core requirements for grate plates: high-temperature resistance, thermal shock resistance, wear resistance, oxidation resistance and resistance to ash and slag corrosion. Listed below in order of most common use in industrial boilers: I. Standard cast iron types (the preferred choice for small-scale, low-temperature, atmospheric-pressure coal-fired boilers; offering the best value for money) 1. Grey cast iron (HT150/HT200) Characteristics: Lowest cost, simple casting, good thermal conductivit..

How to select the appropriate grate bar material based on actual requirements?

• By Alex Hu
• 31/07/2026
• 0 comments

A comprehensive, practical approach to selecting grate bar materials Core selection logic: combustion temperature > fuel type (sulphur, ash, corrosion) > stress conditions of the grate structure > budget; simply compare these factors step by step to make your selection. I. Step 1: Determine the long-term operating temperature of the furnace chamber (the most critical indicator) The primary cause of grate failure: high-temperature oxidation and burnout, and cracking due to thermal expansion and contraction. Selection criteria based on temperature: Operating temperature <..