Zhengzhou Kewei Refractory Materials Co., Ltd., a long-established enterprise (founded in 1984) in Xinmi, Henan—known as the “Refractory Capital of China”—is an integrated refractory materials company specializing in refractory bricks for kiln maintenance and construction. We focus on hot and cold repairs for kilns in the cement, lime, metallurgy, and hazardous waste incineration industries, offering in-house material production, self-operated construction, and worry-free after-sales service.

Maintenance Advantages

With 40 years of deep expertise in refractory materials, we hold comprehensive repair certifications, have a registered capital of 80 million yuan, and are certified as a Grade II General Contractor for Metallurgical Engineering. We are recognized as a High-Tech Enterprise and a Green Factory. Equipped with 6 calcining kilns and 3 tunnel kilns, we ensure ample production capacity and consistent quality for kiln repair bricks. 

Specialized Refractory Bricks for Repairs (Full Product Range):

High-alumina bricks (LZ55/65/75/80): Kiln mouth, kiln tail, and preheater; resistant to spalling; high-temperature resistance: 1,580–1,770°C.

Silica-mullite bricks: High-temperature zone of rotary kilns; low creep, wear-resistant, and resistant to thermal shock.

Phosphate bricks: Lime kilns, vertical kilns; alkali-resistant, strong bonding, and excellent thermal stability.

Corundum-mullite bricks: Mineral electric furnaces, incinerators; erosion-resistant and long-lasting.

Anchor bricks, arch foot bricks: Kiln roof and arch sections; provide stability and prevent detachment.

Integrated Maintenance and Construction (In-House Team): Under the Yunao Kiln Technology division, our specialized hot and cold repair teams offer a 30-minute response time and 24-hour on-site engineer support. We specialize in the removal of old bricks and the laying of new bricks in rotary kilns, lime kilns, hot blast stoves, and incinerators, as well as hot repairs and kiln drying guidance.

Extensive Project Experience and Excellent Reputation:Serving WISCO, Nangang Steel, Conch Cement, Dongfang Hope, and others; representative projects include: complete lining replacement for a Ø5m × 70m lime rotary kiln, major overhaul of a double-chamber kiln, and hot repair of a cement kiln mouth—all backed by a 12-month warranty and extended service life. Customization + Rapid Delivery: In-house raw materials + automated production line switching; we can customize special-shaped bricks, precast components, and castables; standard bricks delivered in 3 days; emergency repair materials shipped the same day.

Supporting Unshaped Refractory Materials for Repairs (Rapid Repair):Steel-fiber castables, corundum castables, plastic refractories, spray coatings, refractory mortars, and insulation wool—the top choice for emergency hot repairs.

Why Choose Zhengzhou Kewei Refractories?

Professional, Reliable, and Hassle-Free—In-house raw material production reduces costs; in-house construction ensures quality; and rapid after-sales response provides a one-stop solution for kiln repairs. By eliminating middlemen, we offer high cost-effectiveness, short project timelines, and controllable quality.