Zhengzhou Kewei Refractory Materials Co., Ltd. (Abbreviation: Zhengzhou Kewei Refractories), as a professional manufacturer of premium-grade high-alumina bricks located in Xinmi City, Zhengzhou, Henan Province, Zhengzhou Kewei Refractories has been deeply engaged in the refractory materials industry for over 40 years, boasting robust production and customization capabilities.

I. Corporate Strength

- Establishment and Scale: Founded in 1984, the company has a registered capital of 80 million yuan and is located in Xinmi City, known as the “Capital of Refractories in China”.

- Production Equipment: It is equipped with a 160-meter high-temperature tunnel kiln, 26 (315-1200 tons) fully automatic presses, and 6 calcination shaft kilns, with an annual production capacity of 100,000 tons of shaped refractories.

- Corporate Qualifications: It is a high-tech enterprise, a specialized and innovative enterprise, and a green factory, and has the secondary general contracting qualification for metallurgical engineering construction.

- Technological Advantages: With a standardized laboratory, it can produce high-grade high-alumina products such as LZ-75, LZ-80, and LZ-85.

II. Product Parameters of Premium-Grade High-Alumina Bricks

The premium-grade high-alumina bricks (extra-grade 1 high-alumina bricks) produced by Zhengzhou Kewei Refractories mainly refer to high-end products with an Al₂O₃ content of ≥75%-85%:

- Main Grades: LZ-75, LZ-80, LZ-85.

- Al₂O₃ Content: 75%-85%.

- Refractoriness: ≥1790°C.

- Softening Temperature Under Load: ≥1520°C-1550°C.

- Bulk Density: ≥2.50-2.70 g/cm³.

- Cold Crushing Strength: ≥55 MPa.

- Performance Characteristics: High softening temperature under load, good thermal shock stability, creep resistance, acid-alkali corrosion resistance, and high strength at high temperatures.

III. Application Fields

They are mainly used in the key parts of high-temperature industrial kilns:

- Metallurgical Industry: Blast furnace shaft, hot blast stove, electric furnace cover, ladle lining.

- Building Materials Industry: Cement kiln, glass kiln, lime kiln.

- Chemical/Power Industry: Petrochemical heating furnace, waste incinerator, coal gasification furnace.

IV. Customization Services

- Standard Bricks: Provide general national standard sizes such as T-3.

- Custom-Made Special-Shaped Bricks: Can produce various special-shaped bricks, springer bricks, anchor bricks, checker bricks, etc. according to drawings.