Ensuring the quality and performance of nozzle brick is the key factor to ensure the smooth continuous casting of steel. The following methods are based on the latest information summary to ensure the quality and performance of nozzle bricks:

I. Strictly control the quality of raw materials

The main raw materials of Shuikou brick include bauxite clinker, semi-soft clay, zirconium dioxide, clay clinker and so on. The quality of these raw materials directly affects the performance of nozzle brick. Therefore, raw materials must undergo strict physical and chemical inspection after entering the factory to ensure that their composition and properties meet the requirements.

II. Optimize the production process

Blending and mixing: accurately weigh all kinds of powder and granular materials according to the formula requirements, and add binder for full mixing.

Forming and drying: forming with a press to ensure that the forming pressure and the number of hammers meet the technological requirements. The formed green bricks need to be dehumidified in a low-temperature dryer to solidify the binder.

Sintering and post-treatment: adopt flame-proof protection process for sintering to avoid direct contact with flame and reduce oxidation. After firing, vacuum oil immersion and carbonization are carried out to further improve the oxidation resistance and thermal shock resistance of Shuikou brick.

III. Strengthening quality inspection

Appearance and size inspection: check whether the appearance of the nozzle brick is complete and whether the size meets the design requirements.

Physical and chemical properties testing: including fire resistance, thermal shock resistance, wear resistance, corrosion resistance, etc. Chemical analysis and physical performance testing are carried out through professional testing equipment and laboratories.

Practical use test: test the performance of nozzle brick under simulated working conditions, such as thermal shock resistance test by rapid cooling and rapid heating cycle experiment.

IV. Adoption of advanced materials and technologies

Material innovation: develop new inorganic non-metallic materials, such as silicon carbide-based composite materials, to improve the high-temperature mechanical properties and chemical erosion resistance of nozzle bricks.

Process improvement: Nanotechnology is adopted to optimize the microstructure of nozzle brick to further improve its thermal shock resistance and slag resistance.

V. Establish a sound quality management system

Standardized production: production management is carried out in strict accordance with international standards (such as ISO 9001).

Whole process monitoring: from raw material procurement to finished product warehousing, strict quality monitoring is carried out in every link.

Continuous improvement: continuously optimize the production process and product performance according to customer feedback and actual use.

Through the above measures, the quality and performance of nozzle brick can be effectively ensured and the high requirements in steel continuous casting production can be met.