Silicon carbide 88 refers to black silicon carbide with approximately 88% SiC content, commonly used in metallurgical and foundry applications.
Compared with higher grades such as SiC 90 or SiC 98, SiC 88 contains slightly higher impurity levels but provides a more cost-effective solution for bulk production.
For a broader understanding of silicon carbide in metallurgy, you can read:
👉 Silicon Carbide in Metallurgy: Applications, Benefits and Specifications
Key Applications of Silicon Carbide 88 in Foundry
1. Deoxidizer in Molten Iron
One of the main uses of SiC 88 in foundry is as a deoxidizer.
In molten iron, silicon carbide reacts with oxygen to:
- reduce oxidation
- improve metal purity
- stabilize the melting process
In practice, foundries use SiC 88 during melting or refining stages to improve casting quality.
2. Carbon Additive for Composition Control
SiC 88 is also used to adjust carbon content in molten iron.
Compared with traditional carbon additives, silicon carbide:
improves carbon absorption efficiency
reduces material loss
enhances reaction speed
In many casting plants, SiC 88 is used when fast carbon adjustment is required during production.
3. Slag Improvement and Fluidity Control
Silicon carbide can help improve slag fluidity and reduce slag viscosity.
This leads to:
- better separation of impurities
- cleaner molten metal
- improved casting quality
In our experience, slag control is one of the key benefits of using silicon carbide in foundry operations.
Typical Dosage of Silicon Carbide 88 in Foundry
In most foundry applications, silicon carbide 88 is typically added at around:
👉 2–5 kg per ton of molten iron
However, the actual dosage depends on:
- furnace condition
- required carbon content
- casting process
- slag composition
In practice, improper dosage is one of the most common causes of unstable performance.
For comparison with other grades, see:
👉 SiC80 vs SiC90 Silicon Carbide in Metallurgy and Refractory Applications
SiC 88 vs SiC 90 in Foundry Applications
| Grade | SiC Content | Typical Use | Advantage |
|---|---|---|---|
| SiC 88 | ~88% | Foundry / bulk casting | Lower cost |
| SiC 90 | ~90% | High-quality casting | Better stability |
In real production environments:
- SiC 88 is widely used for cost-sensitive casting
- SiC 90 is preferred for higher consistency and quality control
For a detailed comparison, you can read:
👉 Silicon Carbide 88 vs 90: Key Differences and Best Applications
Common Problems When Using Silicon Carbide 88
Problem 1: Unstable Carbon Recovery
Some foundries report unstable carbon recovery when using lower-grade SiC.
This is usually caused by:
- higher impurity content
- inconsistent particle size
👉 Solution:
Use stable suppliers and ensure consistent quality.
Problem 2: Slag Build-Up
Higher impurity levels can increase slag formation.
👉 Solution:
Select materials with controlled impurity content.
Problem 3: Inconsistent Performance Between Batches
Variation between batches can lead to unpredictable results.
👉 Solution:
Work with suppliers who provide consistent production and testing reports.
If you are sourcing materials, you may find this guide useful:
👉 How to Choose a Silicon Carbide 88 90 Manufacturer
How to Choose Silicon Carbide 88 for Foundry
When selecting SiC 88, consider:
1. Chemical Composition
Check SiC content and impurity levels.
2. Particle Size Distribution
Uniform particle size ensures stable reaction.
3. Supplier Reliability
Consistency is more important than price.
4. Application Requirements
Choose based on your casting process and quality needs.
For steelmaking applications, you can also read:
👉 How to Choose the Right Silicon Carbide Grade for Steelmaking
Practical Recommendation
Based on industry practices:
- Use SiC 88 for cost-effective casting applications
- Use higher grades for precision or high-quality casting
- Always test samples before bulk orders
- Focus on supplier consistency rather than lowest price
Frequently Asked Questions
Q:What is silicon carbide 88 used for in foundry?
A:SiC 88 is mainly used as a deoxidizer and carbon additive to improve casting quality and stabilize the melting process.
Q:What is the typical dosage of SiC 88?
A:Typically 2–5 kg per ton, depending on process conditions.
Q:Is SiC 88 better than SiC 90?
A:Not necessarily. SiC 88 is more cost-effective, while SiC 90 provides better stability.
Q:Why is silicon carbide used in casting?
A:It improves carbon recovery, reduces oxidation, and enhances process efficiency.
Q:How to choose a reliable silicon carbide supplier?
A:Choose based on quality consistency, impurity control, and supplier reliability.
Looking for high-quality Silicon Carbide 88 for foundry applications?
We provide:
- Stable SiC 88 supply
- Consistent particle size control
- Reliable quality for casting applications
- Bulk supply with fast delivery
👉 Contact us today to request samples and quotation.
ZHEN AN INTERNATIONAL CO.,LIMITED
ZhenAn is an enterprise specializing in Metallurgical & Refractory products , integrating production, processing, sales and importing and exporting business.
We are focused on building a dedicated team of professionals across the globe. At ZhenAn, we are committed to provide complete solutions by delivering the "right quality & quantity" to suite our customer's processes.
Annual production and sales more than 150,000 tons. Our factory covering an area of 30,000 square meters, it has a complete set of modern production equipment, two large production bases including hydro-metallurgy, two key laboratories and a metallurgical materials testing center with dozens of senior researchers.
