In modern steelmaking process, plug brick, as a key refractory, plays a vital role. It is located at the bottom of the stopper and matched with the nozzle brick. It is mainly used to control the flow of molten steel and ensure the smooth steelmaking process. This paper will introduce the characteristics, technical data, quality control and its importance in steelmaking process in detail.

I. Characteristics of plug bricks

Plug bricks have many excellent characteristics, which enable them to work stably in high temperature and complex steelmaking environment. First of all, it has high fire resistance, can withstand extremely high temperatures in the steelmaking process, and ensures that it will not be melted or deformed in a high temperature environment for a long time. Secondly, the plug brick has good thermal shock resistance, which can keep the structural integrity under the condition of rapid temperature change and avoid cracking caused by thermal stress. In addition, it also has good wear resistance and crack resistance, which can keep the surface smooth under the scouring of molten steel and reduce the occurrence of wear and cracks. At the same time, the plug brick also has good corrosion resistance, will not be corroded by chemical components in molten steel, and will not pollute molten steel, thus ensuring the purity of molten steel. Finally, the shape of the plug brick is regular, the size is accurate and the channel is smooth, which is helpful to the smooth flow of molten steel and improve the steelmaking efficiency.

II. Technical Data of Plug Brick

The technical data of plug brick is an important index to measure its performance. According to different application scenarios and customer needs, plug bricks are divided into sintered and non-sintered types. Sintered plug bricks have higher strength and stability, while non-sintered plug bricks have better processability and cost advantages. Taking SK-34 model as an example, its quality standard conforms to KS, JIS, ASTM, ASME, AMS, DIN and other international standards, and can meet the needs of customers in different countries and regions. In addition, the size, chemical composition and technical specifications of plug bricks can be customized according to the specific requirements of customers to adapt to different steelmaking processes and equipment.

III. Quality Control of Plug Bricks

Quality is the lifeline of plug bricks. In order to ensure the high quality of products, plug brick production enterprises have established a set of perfect quality control system. Professional quality inspectors will sample all products and strictly control every production link. Quality inspection items include professional quality inspection, such as chemical analysis and physical performance test, as well as appearance inspection, including dimensional tolerance, deformation, cracks, corner defects, melting holes and colors. Only products that pass strict inspection will be allowed to leave the factory to ensure that every plug brick received by customers meets high quality standards.

IV. Packaging and Transportation of Plug Bricks

Packaging and transportation of plug bricks are also important links to ensure product quality. Refractory bricks are usually packed in pallets, fixed with PET packing tape and covered with plastic film to prevent them from being damaged during transportation. The size of standard export pallets is 1000×1000 mm, and the load capacity of each pallet is 1.5-2.0 tons. In transportation, a 20-foot container can carry 24 tons, and a 40-foot container can carry 28 tons. This efficient packaging and transportation mode not only ensures the safe transportation of products, but also improves the logistics efficiency and reduces the transportation cost.

V. Importance of plug bricks in steelmaking process

Plug bricks play an indispensable role in steelmaking process. In the non-pouring state, the plug brick can tightly block the nozzle, prevent the leakage of molten steel and ensure the tightness in the steelmaking furnace. In the pouring process, by lifting the stopper rod, a gap is formed between the stopper brick and the nozzle brick, and molten steel flows out from the nozzle brick, thus realizing accurate molten steel control. The performance of plug bricks is directly related to the quality of molten steel and the efficiency of steelmaking. If the quality of plug bricks is poor, it may lead to leakage, pollution or poor flow of molten steel, thus affecting the whole steelmaking process. Therefore, it is very important for steel-making enterprises to choose high-quality plug bricks.

VI. Frequently Asked Questions and Answers of Plug Bricks

In the process of purchasing and using plug bricks, customers may encounter some common problems For example, how to get an accurate price? This requires customers to provide detailed product information, such as specifications, technical data, dimensions, drawings, quantities, application fields and unloading ports. Based on this information, the enterprise will quote the best price for customers. Another common problem is the service life of plug bricks. The service life of different types of plug bricks is different, which also depends on the use conditions and methods. If the product has quality problems, the enterprise will negotiate with the customer and make compensation according to the evidence.

VII. Conclusion

As an important refractory, plug brick plays a key role in steelmaking process. It not only has many excellent characteristics, but also ensures the high quality and safety of products through strict quality control and efficient packaging and transportation. Choosing high quality plug bricks is of great significance for improving steelmaking efficiency, ensuring molten steel quality and reducing production cost. With the continuous development of steelmaking technology, plug bricks are constantly being innovated and improved to meet the increasingly strict production requirements and provide strong support for the development of steelmaking industry.