Product Introduction
Calcined petroleum coke carburizer is a carbon additive produced by calcining delayed petroleum coke (1200-1400°C). Characterized by high fixed carbon and low impurities, it is a cost-effective carburizer widely used in foundry and steelmaking industries.
Key Characteristics
|
Parameter |
Specification |
Advantage |
|
Fixed Carbon (FC) |
95-98% |
High carbon content, stable carburization effect |
|
Sulfur Content (S) |
0.3-0.8% |
Dosage control required based on steel grade |
|
Ash Content |
0.5-1.5% |
Lower than coal-based carburizers |
|
Volatile Matter (V) |
≤0.5% |
Thorough calcination reduces smelting fumes |
|
Absorption Rate |
80-90% |
Moderate dissolution speed (5-10 minutes) |
|
Particle Size |
1-10mm (customizable) |
Adaptable to various furnace types |
Manufacturing Process
Raw Material Selection:
Low-sulfur delayed petroleum coke (S≤1.0%)
Calcination Process:
Rotary kiln or vertical furnace calcination at 1300°C±100°C
Volatile matter reduction (from 8-10% to ≤0.5%)
Screening & Packaging:
Multi-stage vibration screening with magnetic iron removal
Product Forms
Granular (3-8mm):
General-purpose, suitable for medium-frequency furnaces
Powder (≤1mm):
Cored wire filler material
High-Density Blocks (10-30mm):
Specialized for cupola furnaces
Application Fields
1. Foundry Industry
Gray Iron:
Addition rate: 0.5-1.2% per ton of molten iron, replacing 20-30% pig iron
Reduces production costs by ~15%
Ductile Iron Smelting:
Requires low-sulfur nodularizers (recommended dosage ≤1% when S≤0.1%)
2. Steelmaking
|
Process Stage |
Function |
Key Considerations |
|
EAF Steelmaking |
Carbon adjustment for scrap steel |
Add to furnace bottom early to prevent oxidation |
|
Ladle Carbon Adjustment |
Composition fine-tuning |
Use ≤3mm fine particles |
|
Alloy Steel Production |
Carbon equivalent control |
Avoid simultaneous addition with high-chromium ferroalloys |
3. Competitive Advantages
|
Comparison Item |
Calcined Petroleum Coke Carburizer |
Coal-Based Carburizer |
|
Carbon Content |
95-98% |
85-92% |
|
Sulfur Content |
0.3-0.8% |
0.5-1.2% |
|
Cost-Effectiveness |
★★★★ |
★★★ |
|
Suitability for High-End Castings |
★★★★ |
★★ |
4. Special Applications
Silicon Metal/Ferrosilicon Production: As carbon reductant
Silicon Carbide Preparation: Raw material for quartz sand reaction
Usage Recommendations
- Pre-Treatment:
Dry at 100-150°C for 2 hours in humid environments
- Ratio Optimization:
1:2 blend with graphitized carburizer enhances performance
- Environmental Compliance:
Meets Emission Standard of Air Pollutants for Foundry Industry (GB 39726-2020)
ISO 9001 certified, this product is widely used in mass production of automotive components, pipe fittings, and construction machinery castings. It is particularly suitable for cost-sensitive applications requiring guaranteed carbon absorption rates in large-scale production.