Hebei Fengchao Import and Export Co., Ltd. is one of the most reliable manufacturers and suppliers of graphitized carburizer 3-5mm in China. With a professional production team, we are able to meet the needs of the majority of our customers. If you're going to wholesale bulk graphitized carburizer 3-5mm made in China, welcome to get pricelist from our factory.
This 3-5mm graphitized carburizer undergoes directional crushing and screening to produce regular medium-coarse particles. Particles of moderate size sink rapidly into the molten bath and effectively reduce surface floating combustion loss caused by furnace gas flow. It delivers steady carbon dissolution and is suitable for mass feeding operations in large melting furnaces. It helps metallurgical workshops simplify feeding procedures and ensures stable carbon recovery during continuous smelting.
This 3-5mm graphitized carburizer is subjected to prolonged ultra-high-temperature graphitization to form highly ordered graphite crystal lattices. It features good oxidation resistance at the initial feeding stage, and particles are not prone to premature burnout while passing through the high-temperature flue gas zone. It dissolves gradually from the outside inward in molten iron without abrupt spikes in carbon content. Besides conventional production of gray cast iron and nodular cast iron, it is especially applicable to heavy-section castings. It suppresses casting chilling tendency and reduces the risk of hard white edge defects in thick-walled workpieces.
This 3-5mm graphitized carburizer uses low-sulfur calcined petroleum coke as the base raw material. It is processed in dedicated production facilities through prolonged ultra-high-temperature graphitization, temperature-controlled cooling, selective crushing, gradient screening and impurity removal. Our technical team focuses on adjusting the graphitization holding time to form regular and ordered graphite lattices. Sieve analysis and high-temperature oxidation resistance tests are regularly performed on each batch in the plant. We provide particle selection recommendations for foundry customers according to heavy-section casting processes. The company holds ISO9001 and ISO45001 management system certifications. Every shipment is tested for fixed carbon, sulfur, nitrogen and particle size composition, supplying premium carbon additives for thick-wall casting production.
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FAQ
Q: What drawbacks will occur if the actual particle size of this grade exceeds 5 mm?
A: Although oversized particles sink fast, their dissolution rate drops significantly. Undissolved residual particles tend to settle at the furnace bottom, leading to unstable carbon content readings in subsequent heats.
Q: Why is high-temperature oxidation resistance testing required for the 3-5mm graphitized carburizer?
A: These medium-sized particles must pass through the high-temperature flue gas zone during descent. Good oxidation resistance reduces burnout and ensures stable and controllable carbon recovery in the production of heavy-section castings.
Q: Is it suitable to charge the entire quantity of carburizer in one batch when producing heavy-section nodular cast iron?
A: Mass one-time feeding is not recommended. Batch feeding is preferred to allow gradual carbon dissolution and prevent local carbon enrichment inside the large molten bath.
Q: What hidden risks will excessive mechanical friction during transportation bring to coarse-grained carburizer?
A: Severe friction generates a large amount of fine powder. Fine powder mixed into the product tends to float and burn, enlarging fluctuation deviations in overall carbon recovery.
Q: What key points should be noted for warehousing and transfer of bulk 3-5mm graphitized carburizer?
A: Keep the warehouse dry. Violent dropping is strictly prohibited during material transfer. Impact from falling heavy objects will break coarse particles and disrupt the target particle size grading.
Q: For smelting in medium and large induction furnaces producing thick-wall castings, which smelting condition exerts the greatest influence on carbon absorption of this carburizer?
A: The initial temperature of molten iron is critical. Too low a temperature slows particle dissolution. A proper melting-start temperature must be maintained to allow sufficient dissolution time for coarse particles.
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