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Product Description
High-Performance Sinter Machine Grate Bars for Enhanced Metallurgical Efficiency
Sinter machine grate bars are a key component in the sintering process, whose function is similar to a skeleton structure that supports the sintered materials in a high-temperature environment. At Shandong Jiujiu Machinery, we treat these components as the fundamental air-permeable foundation of the sintering strand. By allowing hot air to pass through and form a stable combustion zone, these bars ensure that iron ore fines are transformed into high-quality sinter for blast furnace consumption without the mechanical failures that plague lower-grade castings.
Thermal Resilience and Structural Support
The environment atop a sintering trolley is a brutal mix of extreme heat and chemical aggression. These bars need to withstand high temperatures (800°C-1100°C), corrosion from sulfurous gases, and intense mechanical stress during the discharge phase. To meet these rigorous demands, our sinter machine grate bars are usually made of heat-resistant alloys such as high-chromium cast iron (Cr18, Cr25, or Cr28).
Typically, the grates feature a wavy or concave-convex surface design to increase friction, prevent slipping, and facilitate air distribution, thereby enhancing efficiency. This specialized geometry serves several critical functions:
Uniform Permeability: Precision-cast slots ensure that the suction pressure remains consistent across the entire width of the machine, preventing "cold spots" in the sinter bed.
Oxidation Resistance: The high chromium content forms a self-healing oxide layer that prevents the bars from "growing" or scaling at peak temperatures.
Mechanical Strength: Our bars maintain a stable hardness profile even after thousands of thermal cycles, preventing the sagging or warping that causes equipment jams.
Advanced Manufacturing for Metallurgy
We utilize Vacuum-Sealed Molding (V-Process) to manufacture our grate bars. Unlike traditional sand casting, this method eliminates internal gas porosity and ensures a perfectly smooth surface. This is vital because even a small casting defect can become a "stress riser" under 1000°C, leading to a snapped bar that could potentially damage the down-stream crusher or conveyor system.
Technical FAQ for Maintenance Teams
Q: Why do my current grate bars snap during the discharge phase?
A: Snapping is usually caused by "thermal fatigue" or internal casting defects. Our vacuum-cast, high-chrome alloys are stress-relieved to handle the rapid cooling and mechanical shock experienced at the end of the sintering strand.
Q: Can these bars handle high-sulfur iron ore?
A: Yes. We can customize the alloy with additional Nickel and Silicon to provide enhanced protection against the acidic corrosion caused by sulfur-rich ores.
Q: What is the typical service life of Shandong Jiujiu grate bars?
A: Depending on your specific temperature profile and raw materials, our high-chrome bars typically offer an operational life of 12 to 24 months, significantly reducing your yearly maintenance costs.
Chemical composition % of high chromium cast iron
This product is a customized product and is produced according to customer drawings or samples.
Casting Process
Casting Process
Casting Process
Casting Process
Casting Process
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Delivery site
Inspections & Certifications
Certifications
Certifications
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Keywords
sinter machine grate bars
sinter machine grate bars
Contact Us
Telephone:+86-13792621099
Weifang Binhai New Area Sino-foreign Cooperation Industrial Park, about 260 meters west of the intersection of Hai 'an Road and Zhenhai Street
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CONTACT US
Telephone：+86-13792621099
Weifang Binhai New Area Sino-foreign Cooperation Industrial Park, about 260 meters west of the intersection of Hai 'an Road and Zhenhai Street
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