Specific steps for the use of seamless calcium wire in the steel industry
As an important metallurgical auxiliary material, seamless calcium wire plays a vital role in the iron and steel industry.It effectively improves the purity and quality of steel by changing the structure and composition of molten steel.The following are the specific steps for the use of seamless calcium wire in the steel industry：
1. Preparation work
Material selection：
Choose a seamless calcium wire with high purity and good uniformity.The seamless calcium wire is mainly composed of three parts: the outer steel pipe, the intermediate coating and the inner core (pure calcium wire) to ensure its good fluidity and fusion.
Equipment preparation：
Advanced calcium wire feeding equipment, such as high-precision automatic wire feeding machines, is used to ensure the continuity and stability of the wire feeding and reduce the phenomenon of disconnection and jamming.
Ensure the normal operation of steelmaking equipment, including converters, refining furnaces, etc.
Environmental control：
Ensure that the temperature and humidity of the steelmaking workshop are appropriate to reduce the influence of environmental factors on the physical properties of calcium wire.
Optimize the gas environment in the steelmaking furnace, such as through precise control of argon stirring, to improve the absorption efficiency of calcium.
2. Calcium line feeding
Feeding time：
According to the different stages of the steelmaking process, determine the best feeding time for calcium wire.Calcium treatment is usually carried out in the refining stage and the continuous casting stage.
Feeding speed：
Control the feeding speed of calcium wire to avoid uneven distribution of calcium wire in molten steel caused by too fast or too slow.
Feeding volume：
Using modern computing technology, the feeding amount of calcium wire is dynamically adjusted according to the composition of molten steel.Avoid excessive feeding, which leads to waste of calcium and imbalance in the composition of molten steel.
3. Calcium treatment process
Deoxygenation of molten steel：
After the calcium wire is added to the molten steel, part of it dissolves into the liquid steel and becomes dissolved calcium in the steel.The dissolved calcium reacts with the residual oxygen in the molten steel to achieve deep deoxygenation of the molten steel.
Remove impurities：
Calcium reacts with Al2O3 inclusions or S in steel to form impurities.These impurities float into the slag during refining and continuous casting, thereby purifying the molten steel.
Optimize the composition of molten steel：
Through calcium treatment, the shape of harmful inclusions in molten steel can be changed, and the purity and casting performance of molten steel can be improved.
4. Follow-up processing
Slag treatment：
The impurities floating into the slag will be discharged in time to avoid adverse effects on the subsequent process.
Molten steel inspection：
The composition analysis of the treated molten steel is carried out to ensure that the expected molten steel quality is achieved.
Casting：
The calcium-treated molten steel is cast to obtain high-quality steel products.
5. Quality control and cost control
Quality monitoring：
Establish and improve the quality management system of the calcium treatment process to ensure that every link can meet the requirements of energy conservation, emission reduction and cost control.
Regularly conduct quality inspections of calcium-treated steel to ensure stable product quality.
Cost control：
Through measures such as optimizing technology, upgrading equipment, and selecting high-quality calcium wires, the amount and cost of calcium wires are reduced.
Establish an efficiency and quality-oriented performance appraisal system, and encourage employees to take the initiative to find and implement cost-saving measures.
