Calcium Silicon Ca31Si60 | High Calcium For Steel Refining
Suitable for LF, RH and continuous casting processes with stable composition.
Reliable supply, flexible delivery and consistent performance for clean steel production.
What is Ca31Si60?
Calcium silicon Ca31Si60 is a high-calcium alloy specifically designed for secondary steel refining processes where sulfur removal and inclusion control are critical.
Compared with standard grades, the higher calcium content in Ca31Si60 improves calcium activity in molten steel, making it more effective in modifying alumina-based inclusions and reducing sulfur content. This makes it particularly suitable for clean steel production and continuous casting operations.
Metallurgical Function of Ca31Si60
In practical steelmaking, Ca31Si60 is not simply used as a deoxidizer. Its main value lies in calcium treatment during the refining stage.
1. Desulfurization Mechanism
Calcium reacts with sulfur in molten steel to form stable CaS, which helps reduce sulfur content and improve steel quality.
Higher calcium content means:
- Faster reaction kinetics
- Better sulfur removal efficiency
- More stable refining results
2. Inclusion Modification
In aluminum-killed steel, Ca31Si60 is used to modify solid alumina (Al₂O₃) inclusions into liquid or globular calcium aluminates.
This helps:
- Reduce nozzle clogging during continuous casting
- Improve steel cleanliness
- Enhance casting stability
3. Final Stage Steel Treatment
Ca31Si60 is typically added during ladle refining or wire feeding stages, where precise control of calcium content is required.
Its performance depends on:
- Injection timing
- Steel temperature
- Oxygen and sulfur levels
Typical Specifications of Ca31Si60
|
Brand |
Chemical Composition(%) |
|||||
|
Ca |
Si |
C |
Al |
P |
S |
|
|
≥ |
≥ |
≤ |
||||
|
Ca31Si60 |
31 |
55-65 |
1.0 |
2.4 |
0.04 |
0.06 |
Applications of Ca31Si60
Secondary Refining (LF / RH / VD)
Used in ladle furnace and vacuum refining processes for:
- Deep desulfurization
- Inclusion control
- Final steel adjustment
Clean Steel Production
Widely used in production of:
- Bearing steel
- Automotive steel
- Pipeline steel
- High-strength structural steel
These applications require strict control of inclusions and impurities.
Continuous Casting
Ca31Si60 plays an important role in preventing:
- Nozzle clogging
- Casting instability
- Surface defects
Packaging and Handling
Due to the high reactivity of calcium, proper packaging is essential.
- Moisture-proof inner liner
- Strong export-grade outer bags
- Controlled storage conditions
This helps prevent oxidation and ensures stable performance during use.
Quality Control and COA
Each batch is supplied with a Certificate of Analysis including:
- Chemical composition
- Impurity levels
- Size distribution
Consistency between batches is essential to ensure stable refining performance.
Supply and Delivery Capability
From practical supply experience, consistency and delivery reliability are critical for steel plants.
- Stable production capacity for continuous supply
- Lead time: typically 7–15 days
- Flexible shipment arrangements
- Support for long-term contracts and regular delivery
We can support both spot orders and scheduled supply.
FAQ
Q:What is Ca31Si60 used for in steelmaking?
A:Ca31Si60 is mainly used for desulfurization, inclusion modification, and final refining in steelmaking processes, especially in ladle treatment and secondary metallurgy.
Q:Why choose Ca31Si60 instead of Ca28Si55?
A:Ca31Si60 has higher calcium content, which provides stronger desulfurization ability and more effective inclusion modification, making it more suitable for clean steel and high-grade steel production.
Q:How does Ca31Si60 improve steel cleanliness?
A:It modifies solid alumina inclusions into liquid calcium aluminates, reducing harmful inclusions and improving casting performance and steel quality.
Q:When should Ca31Si60 be added during the process?
A:It is typically added during ladle refining or injected through cored wire in the final stage, where calcium treatment is most effective.
Q:Is Ca31Si60 suitable for continuous casting?
A:Yes, it helps reduce nozzle clogging and improves casting stability by controlling inclusion morphology.
Q:What is the typical size of Ca31Si60 supplied?
A:Common sizes include 10–50 mm and 10–100 mm, with customized sizes available based on process requirements.
Q:Can Ca31Si60 be used in cored wire production?
A:Yes, it is widely used as a core material in cored wire for controlled calcium addition in secondary refining.
Q:How do you ensure consistent quality?
A:Each batch is tested and supplied with a COA including chemical composition, impurity levels, and size distribution to ensure stable performance.
Looking for a Reliable Ca31Si60 Supplier?
For steel plants requiring stable refining performance, choosing the right calcium silicon grade is critical.
👉 Contact us to get detailed specifications and the latest quotation.
Why Work With ZhenAn
- Stable product quality for continuous production
- Reliable supply capacity for large-volume demand
- Competitive pricing based on market conditions
- Export experience with international logistics support
We focus on long-term cooperation and consistent supply rather than short-term transactions.
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