The specific usage steps of seamless calcium wire in the steel industry
The use of seamless calcium wire in the steel industry is mainly achieved by adding it to the molten steel through wire feeding technology to achieve purposes such as deoxidation, desulfurization, and control of inclusion morphology. The following are the specific usage steps of seamless calcium wire in the steel industry:
preparation:
Check the feeding equipment: Ensure that the feeding equipment is in good condition, including the feeding machine, feeding tube, and feeding nozzle.
Prepare seamless calcium wire: Select the appropriate specifications and lengths of seamless calcium wire according to production needs, and place it on the feeding equipment.
Feeding operation:
Installation of wire feeding tube: Insert the wire feeding tube into the appropriate position of the molten steel ladle or intermediate ladle, ensuring that the end of the wire feeding tube is close to the surface of the molten steel.
Start the feeding equipment: Start the feeding equipment and adjust the feeding speed to evenly feed the seamless calcium wire into the molten steel. The feeding speed should be adjusted based on factors such as the temperature, weight, and diameter of the calcium wire of the molten steel.
Calcium treatment process:
Calcium wire melts in molten steel: Seamless calcium wire quickly melts in high-temperature molten steel, releasing calcium elements. Calcium element forms calcium vapor in molten steel, which can effectively react with impurities such as oxygen and sulfur in the steel.
Deoxidation and desulfurization: Calcium has strong deoxidation and desulfurization capabilities, which can form calcium oxide (CaO) with oxygen in molten steel and calcium sulfide (CaS) with sulfur, thereby reducing the oxygen and sulfur content in molten steel.
Inclusion morphology control: Calcium element can change the morphology of inclusions in molten steel, transforming them from brittle inclusions to plastic inclusions, thereby improving the castability of molten steel and the mechanical properties of castings.
Processing effect detection:
Sampling and testing: After the calcium treatment is completed, the molten steel is sampled and tested to evaluate the effectiveness of the calcium treatment. The main testing items include the oxygen and sulfur content in molten steel, as well as changes in the morphology of inclusions.
Adjust process parameters: Based on the test results, adjust the calcium feeding speed or other process parameters as necessary to ensure that the calcium treatment effect meets the requirements.
Subsequent processing:
Refining and continuous casting: The steel treated with calcium can undergo subsequent refining and continuous casting processes to further improve the quality and performance of the steel.
Finished product inspection: The final inspection of the finished steel billet is carried out to ensure that its quality and performance meet the standard requirements.
