Product Introduction
1,Main Components
High-purity fixed carbon (typically ≥95%-99%), made from petroleum coke, graphite, or high-quality anthracite, purified at high temperatures and pressed into cylindrical granules.
Low sulfur (≤0.5%) and low nitrogen (≤0.1%), with minimal impurities to avoid adverse effects on molten metal.
Physical Characteristics
Shape:
Cylindrical granules (common specifications: 1-5mm diameter, 5-30mm length), ensuring good flowability for easy feeding.
Density:
High (1.4-1.8 g/cm³), reducing floating losses during smelting.
Dissolution Rate:
Specially processed for rapid dissolution in molten iron (typically 3-8 minutes) with high absorption rates (up to 85%-95%).
Key Advantages
Efficient Carburization:
Quickly replenishes carbon, reducing smelting time and saving energy.
High Stability:
Uniform composition with minimal carbon fluctuation for precise final carbon control.
Eco-Friendly:
Low volatile content and minimal dust, reducing smoke pollution.
Application Scope
1,Foundry Industry
Cast Iron Production: Used in melting gray iron, ductile iron, and compacted graphite iron to adjust carbon equivalent (CE) and improve mechanical properties (e.g., strength, hardness).
Electric Furnace Melting: Paired with scrap steel in medium-frequency or electric arc furnaces to replace pig iron, lowering production costs.
2,Steelmaking
Steelmaking Process: Used in converters or refining furnaces for fine-tuning carbon content, especially in low-carbon steel production.
Ladle Refining: Added to the ladle as a carburizer to stabilize chemical composition.
3,Other Applications
Alloy Production: Adjusts carbon content in ferroalloys (e.g., ferrosilicon, ferromanganese).
Metal Additives: Used in the production of special alloys (e.g., carburized ferrochrome).
Usage Recommendations
1,Feeding Timing
Electric Furnace Melting: Added to the furnace bottom along with scrap steel or in batches after iron melting.
Ladle Treatment: Added via wire feeding or directly during tapping.
2,Dosage Calculation
Based on the difference between target and initial carbon content:
Carburizer Dosage=Molten Iron Weight×(Target C%−Initial C%)Absorption Rate%×Fixed Carbon%Carburizer Dosage=Absorption Rate%×Fixed Carbon%Molten Iron Weight×(Target C%−Initial C%)
3Precautions
Avoid direct contact with high-temperature furnace walls to prevent oxidation.
Match particle size to furnace capacity (larger furnaces use coarser granules).
Industry-Specific Applications
|
Industry |
Function |
Recommended Carbon Content |
|
Gray Iron Casting |
Adjusts graphite morphology, improves fluidity |
3.2%-3.8% C |
|
Ductile Iron |
Ensures nodularization, reduces shrinkage |
3.5%-4.0% C |
|
Low-Carbon Steel |
Precise carbon adjustment (0.1%-0.3%) |
High absorption (≥90%) |
Cylindrical fast-dissolving carburizer enhances smelting efficiency and reduces costs, making it a key auxiliary material in modern foundry and steel industries. Selection should be based on specific process requirements (e.g., sulfur content, dissolution speed).