Product Description
Pure calcium flux-cored wire is a specialized flux-cored wire consisting of a solid-core metal calcium wire encased in cold-rolled steel strip, designed specifically for deep calcium treatment of molten steel. It serves as the core material for the refining of clean steel, low-carbon steel, and pipeline steel.
Structure and Specifications
| Core Material | 96%+ high-purity solid-core calcium wire (φ7.5–7.8 mm) |
| Outer Sheath | Cold-rolled bright steel strip (thicker, higher tensile strength) |
| Wire Diameter | Standard φ9.5±0.5mm |
| Calcium Content | ≥97% (solid-core pure calcium) |
| Unit Weight | Approx. 67g/m (calcium wire) |
Four Core Applications (For Steelmaking)
Deep deoxidation
Powerful deoxidation that reduces oxygen content in steel to extremely low levels.
Efficient desulfurization
Forms stable CaS, significantly reducing sulfur content.
Inclusion modification
Converts Al₂O₃ into liquid calcium aluminate, improving steel toughness, fatigue resistance, and surface quality.
Prevents Tapping Hole Scaling in Continuous Casting
Eliminates Al₂O₃ aggregation to ensure smooth continuous casting.
Key Advantages
Extremely high calcium recovery rate
15%–30% (compared to approximately 10% for calcium-silicon wire), improving efficiency by over 50%
Lower dosage
Only 38% of the dosage required for calcium-silicon wire per ton of steel, significantly reducing costs
Pure and impurity-free
No powder additives or additional oxides, ideal for producing high-purity steel
Deeper penetration
Solid-core, high-density design allows calcium to react and remain in the molten steel for longer
Stable and reliable
Uniform composition, precise wire feeding, and minimal risk of wire breakage
Suitable Steel Grades
Low-carbon steel, ultra-low-carbon steel (SPHC, SPHD)
Pipe and line steel, automotive sheet, home appliance sheet
Clean steel, deep-drawing steel, high-toughness structural steel
FAQ
Q: What is the purpose of pure calcium flux-cored wire?
A: It is used for calcium treatment in steelmaking to purify molten steel, reduce inclusions, and improve steel quality.
Q: What is the difference between pure calcium flux-cored wire and calcium-silicon flux-cored wire?
A: Pure calcium flux-cored wire has a higher calcium content and is suitable for high-end, high-purity steel. Calcium-silicon flux-cored wire is lower in cost and is often used for general-purpose steel.
Q: What precautions should be taken when using pure calcium cored wire?
A: Use a dedicated feeding machine, control the speed and depth, store in a dry, moisture-free environment, and use as soon as possible after opening.
Q: Why choose seamless welded pure calcium cored wire?
A: It provides excellent sealing, prevents oxidation, ensures high calcium recovery rates, and delivers more stable steelmaking results.
Q: What are the key quality indicators for pure calcium cored wire?
A: High calcium purity, airtight outer coating, uniform wire diameter, and smooth feeding.
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