Against the background of improving quality, increasing efficiency, reducing costs and carbon emissions in the steel industry in 2026, the optimization of Calcium Cored Wire Feeding Process has become a key link for steel mills to enhance their core competitiveness. Most steel mills still have problems such as unreasonable feeding parameters, low equipment matching, and large fluctuations in calcium recovery rate during calcium treatment, leading to high production costs and unstable molten steel quality. Through scientific optimization of Calcium Cored Wire Feeding Process, the calcium recovery rate can be increased by 10-15%, the cost per ton of steel can be reduced by 3-5 yuan, and the castability of molten steel and slab quality can be effectively improved, creating significant economic benefits for steel mills.
Analysis of Core Influencing Factors of Calcium Cored Wire Feeding Process
The effect of Calcium Cored Wire Feeding Process is mainly affected by three core factors, which need to be accurately matched according to steel grade, furnace capacity and equipment model:
1. Feeding Speed
Feeding speed directly affects the residence time and reaction effect of the calcium core in the molten steel. Too slow speed will lead to premature oxidation of the calcium core, while too fast speed will cause the calcium core to sink without full reaction. The industry optimization standard in 2026 is: the feeding speed of seamless solid calcium cored wire is controlled at 80-120m/min, that of double-layer solid calcium cored wire is controlled at 60-90m/min, and the speed can be appropriately reduced by 5-10m/min for high-end special steel to ensure full reaction of calcium.
2. Feeding Dosage
Feeding dosage needs to be accurately adjusted according to the oxygen and sulfur content in the molten steel and the requirements of steel grades. Insufficient dosage cannot achieve the ideal deoxidation and desulfurization effect, while excessive dosage will cause waste and excessive molten steel composition. The mainstream dosage standard in 2026 is: 0.8-1.2m per ton of steel for plain carbon steel, and 1.2-1.6m per ton of steel for high-end special steel, which is 20% more accurate than the traditional dosage standard.
3. Equipment Matching Degree
The accuracy, stability of the wire feeder and its matching degree with the calcium cored wire are crucial to the process effect. It is recommended to use automatic wire feeding equipment with an accuracy controlled within ±0.5m/min. At the same time, regularly check the wear of the wire feeding wheel to avoid feeding interruption or speed fluctuation due to equipment failure. In addition, the angle and insertion depth of the feeding pipe need to be adjusted according to the furnace type to ensure that the calcium cored wire is sent to the optimal reaction area of the molten steel.
2026 Calcium Cored Wire Feeding Process Optimization Parameters Table (Classified by Steel Grade)
| Steel Grade Type | Recommended Calcium Cored Wire Type | Feeding Speed (m/min) | Feeding Dosage per Ton of Steel (m) | Insertion Depth (m) | Optimized Effect |
| Plain Carbon Steel | Seamless Solid Calcium Cored Wire (Φ9mm) | 100-120 | 0.8-1.0 | 1.5-2.0 | Calcium recovery rate ≥12%, cost per ton of steel reduced by 3 yuan |
| Gear Steel | Seamless Solid Calcium Cored Wire (Φ9.5mm) | 80-90 | 1.3-1.5 | 2.0-2.5 | Oxygen content ≤15×10⁻⁶, slab defect rate reduced by 40% |
| Aluminum Killed Steel | Double-layer Solid Calcium Cored Wire (Φ10mm) | 70-80 | 1.2-1.4 | 2.0-2.5 | Inclusion denaturation rate ≥90%, castability improved by 25% |
| Tire Cord Steel | High Purity Custom Calcium Cored Wire (Φ10.5mm) | 60-70 | 1.4-1.6 | 2.5-3.0 | Sulfur content ≤0.005%, meeting high-end requirements |
Common Problems and Solutions of Calcium Cored Wire Feeding Process
Problem 1: Large Fluctuations in Calcium Recovery Rate
Solution: Regularly test the purity of calcium cored wire and the quality of steel strip, optimize feeding speed and insertion depth, avoid卷入 of molten steel surface scale, and use automatic wire feeding equipment to improve feeding accuracy.
Problem 2: Wire Breakage During Feeding
Solution: Select calcium cored wire products with tensile strength ≥600MPa, regularly check the wire feeder wheel groove and guide pipe, avoid sharp edges and corners from wearing the steel strip, and prevent calcium cored wire from getting damp and rusting during storage.
Problem 3: Poor Castability of Molten Steel
Solution: Adjust the feeding dosage according to the molten steel composition to ensure full denaturation of inclusions, and control the feeding time at 5-10 minutes before tapping to avoid insufficient reaction of calcium core affecting molten steel fluidity.
Process Optimization Reference: “2026 Steelmaking Wire Feeding Process Optimization Guide” by World Steel Association. Through scientific optimization of Calcium Cored Wire Feeding Process, steel mills can achieve both cost reduction, efficiency improvement and product quality improvement.