What Is The Price Of Pure Calcium Cored Wire?

Pure calcium cored wire is a metallurgical material used for steel refining. It is made by wrapping solid pure calcium wire with cold-rolled steel strip and is mainly used to optimize the cleanliness of molten steel and continuous casting process performance.

Seamless cold-rolled forming technology ensures the steel strip tightly wraps the calcium wire, reducing calcium oxidation loss, with a storage life of up to one year.
Compared to powder-based cored wires (such as silicon-calcium wire), pure calcium wire avoids introducing impurity oxides, resulting in higher steel liquid purity.

🔥 ‌1. Deep purification of molten steel
Deoxidation and desulfurization: Calcium has a strong affinity for oxygen and sulfur, forming low-melting-point CaO and CaS that float to the surface, reducing oxygen content in molten steel to ≤8 ppm and achieving a desulfurization rate exceeding 30%.
Inclusion modification: High-melting-point Al₂O₃ (2050°C) is converted into liquid calcium aluminate (melting point <1400°C), reducing continuous casting nozzle blockage rates by 90%.
⚡ ‌2. Enhancing metallurgical efficiency‌
Doubled calcium recovery rate‌: The steel shell prevents calcium volatilization, achieving a calcium recovery rate of 15–24% (traditional silicon-calcium wire only achieves 5–10%), reducing calcium consumption per ton of steel by 38%‌.
Cost optimization‌: Feeding time is reduced to 8–15 minutes, lowering the cost per ton of steel by 18–22 yuan‌.
🛡️ ‌3. Improved steel performance‌
Enhanced castability‌: Improves molten steel fluidity, reduces sulfide inclusions, and reduces surface defect rates in continuous cast billets by 50%.
Mechanical property optimization‌: Refines grain size, enhances tensile strength and impact toughness, particularly suitable for special steels such as bearing steel and stainless steel.

Low-carbon, low-silicon steel grades

SPHC steel: Stable calcium recovery rate >15%, preventing silicon content exceeding limits caused by aluminum final deoxidation.
Ultra-pure steel: Controlling inclusion morphology to meet high surface quality requirements for automotive sheets, electrical steel, etc.

Continuous casting process optimization

Intermediate ladle calcium treatment to prevent Al₂O₃ blockage of the nozzle and reduce pouring interruptions.

Special metallurgy

Plasticization treatment of inclusions in bearing steel and stainless steel to enhance fatigue resistance.

Rapid testing method
Cut a wire segment and immerse it in a NaCl solution; if it reacts completely within 10 minutes, calculate the calcium content as (G0–G1)/G0 × 100%.
Industry standards
Diameter tolerance: ±0.5 mm (YB/T 053);
Calcium purity: ≥97.0% (DB13/T 1670-2012).

✅ Pure molten steel: Deoxidation and desulfurization rate >30%, inclusion modification rate 90%;
✅ Cost reduction and efficiency improvement: Calcium recovery rate increased by 2–4 times, ton-steel cost reduction of 38%;
✅ Process innovation: Suitable for refining low-carbon steel and special steel, driving the development of green short-process steelmaking.
Its technical maturity has made it a standard process for the production of high-end steels such as automotive sheet and bearing steel.