In modern iron and steel industry, refractory is one of the key factors to ensure the smooth production process. As an important refractory, Shi Ying Shuikou brick is widely used in continuous casting process, and its performance and quality have a vital impact on the efficiency and quality of steel production. This paper will introduce the characteristics, advantages, application and quality control of Shi Ying Shuikou brick in detail to help readers fully understand this key material.

I. Characteristics of Shi Ying Shuikou Brick

Shi Ying Shuikou brick is mainly made of high-purity silicon dioxide (SiO₂), and its purity is usually not less than 99.2%. This high-purity composition endows Shi Ying Shuikou brick with a series of excellent physical and chemical properties.

(1) High fire resistance

Shi Ying Shuikou brick has a very high fire resistance temperature, which can keep stable in extremely high temperature environment. This feature enables it to bear the direct impact of high-temperature molten steel in the process of steel continuous casting without melting or deformation, thus ensuring the continuity and stability of the continuous casting process.

(2) Good corrosion resistance and corrosion resistance.

In the process of iron and steel production, molten steel and slag contain a variety of chemical components, which will have a strong erosion and corrosion effect on refractories. Shi Ying Shuikou brick, with its high-purity silica composition, has excellent corrosion resistance and corrosion resistance, which can effectively resist the chemical corrosion of molten steel and slag and prolong its service life.

(3) High mechanical strength

The cold compressive strength and bending strength of Shi Ying Shuikou brick are not less than 45 MPa and 25 MPa, respectively, which makes it still maintain high mechanical strength in high temperature environment. Even under the impact of molten steel and mechanical vibration, it will not be easily broken or damaged, thus ensuring the smooth continuous casting process.

(4) Low thermal conductivity and coefficient of thermal expansion

The thermal conductivity of Shi Ying Shuikou brick is relatively low, with the maximum not exceeding 0.6 W/m k. This means that it can effectively reduce heat transfer and heat loss in high temperature environment, and also help to maintain temperature uniformity. In addition, the thermal expansion coefficient of Shi Ying Shuikou brick is low, which enables it to maintain dimensional stability when the temperature changes and reduce stress and deformation caused by thermal expansion.

II. Application of Shi Ying Shuikou Brick

Shi Ying Shuikou brick is mainly used in the continuous casting process of iron and steel industry. In the process of continuous casting, molten steel flows into the crystallizer through the nozzle to form a billet. As the key channel of molten steel flow, the performance of Shi Ying nozzle brick is directly related to the quality of molten steel and the efficiency of continuous casting. The characteristics of Shi Ying Shuikou brick, such as high fire resistance, corrosion resistance and low thermal conductivity, enable it to effectively control the flow velocity and temperature distribution of molten steel, thus ensuring the quality and dimensional accuracy of the slab.

Besides steel industry, Shi Ying Shuikou brick is also widely used in metallurgy, glass, chemical industry, national defense, science and technology and other fields. In these fields, the excellent performance of Shi Ying Shuikou brick enables it to meet various requirements of high temperature, corrosion and mechanical strength, which provides a reliable guarantee for the production and development of related industries.

III. Quality Control and Testing

The quality of Shi Ying Shuikou brick is directly related to its performance and service life in practical application. Therefore, strict quality control and testing are the key links to ensure product quality.

(1) Chemical analysis

The main component of Shi Ying Shuikou brick is silica, and its purity is one of the important indexes to measure the product quality. Through chemical analysis, the content of silica in Shi Ying Shuikou brick can be accurately determined to ensure that it is not less than 99.2%. In addition, chemical analysis can also detect the content of other impurities, such as alumina and iron oxide. The lower the content of these impurities, the better the performance of Shi Ying Shuikou brick.

(2) Physical performance testing

The physical performance test includes the measurement of the bulk density, apparent porosity, cold compressive strength and bending strength of Shi Ying Shuikou brick. The bulk density and apparent porosity reflect the density and pore structure of Shi Ying Shuikou brick, while the cold pressing strength and bending strength are directly related to its mechanical strength in high temperature environment. Through these physical performance tests, the quality and performance of Shi Ying Shuikou brick can be comprehensively evaluated.

(3) Appearance inspection

Appearance inspection is one of the important links in quality control of Shuikou brick in Shi Ying. Through visual inspection, we can find some problems such as size deviation, deformation, cracks, corner defects, melting holes and abnormal color of Shi Ying Shuikou brick. These problems may affect the service performance and service life of Shi Ying Shuikou brick, so they must be strictly controlled.

IV. Packaging and Transportation

The packaging and transportation of Shi Ying Shuikou brick is also an important link to ensure product quality. In the packaging process, pallets are usually used for packaging, and they are fixed with PET tape, and the outer layer is covered with plastic film to prevent the Shi Ying Shuikou brick from being damaged during transportation. The size of standard export pallets is 1000×1000 mm, and the loading weight of each pallet is 1.5-2.0 tons. In the process of transportation, 20-foot or 40-foot containers are usually used for transportation. The maximum load of 20-foot containers is 24 tons, and the maximum load of 40-foot containers is 28 tons.

V. Summary

As a high-performance refractory, Shi Ying Shuikou brick plays an important role in the continuous casting process of iron and steel industry with its high-purity silica composition and excellent physical and chemical properties. Strict quality control and inspection measures ensure the high quality and long service life of Shi Ying Shuikou brick. With its rich production experience and advanced production equipment, Zibo Zhuoyue Refractory Co., Ltd. provides high-quality Shi Ying Shuikou brick products and all-round after-sales service to customers all over the world, which provides strong support for the development of iron and steel industry.