Zhengzhou Kewei Refractory Co., Ltd. (hereinafter referred to as "Zhengzhou Kewei Refractory") is a professional enterprise specializing in the construction of shaft furnaces (including lime shaft furnaces, annular sleeve kilns, Maerz twin-chamber shaft kilns, etc.). Leveraging its subsidiary, Yunai Kiln Technology, the company provides integrated turnkey services encompassing "design - refractory materials - construction - kiln drying - maintenance." 

I. Corporate Strength

Established in 1984 with a registered capital of RMB 80 million, holding Grade II General Contracting Qualification for Metallurgical Engineering Construction and recognzed as a National High-Tech Enterprise + Green Factory.  

Full industrial chain: In-house production of refractory materials (e.g., high-alumina bricks, castables) + self-operated construction + maintenance, with no outsourcing of core processes.  

II. Scope of Shaft Furnace Construction Services  

Furnace Types Covered: Lime shaft furnaces, annular sleeve kilns, Maerz twin-chamber kilns, pelletizing shaft furnaces, industrial shaft furnaces, etc.  

Service Offerings:  

- New Construction Turnkey Projects:Comprehensive design, refractory material supply, masonry/casting, kiln drying, commissioning, and handover.  

- Overhaul Services:Removal of old linings, installation of new linings, hot repair, and lining replacement.  

- Technical Services:Furnace type optimization, refractory material selection, and kiln drying plan formulation.  

III. Representative Shaft Furnace Projects

- Turnkey construction of an annular sleeve kiln (lime kiln).  

- Construction of a 600 TPD gas-fired lime suspension cylinder Maerz shaft kiln.  

- New construction and overhaul of multiple 500–800-ton lime shaft furnaces.  

IV. Competitive Advantages

- Quality Control: In-house refractory production and self-operated construction ensure end-to-end quality management with a 12-month warranty.  

- Short Project Timelines: Integrated services reduce intermediate links, enabling rapid response (e.g., 30-minute repair reporting, 24-hour on-site service).  

- Cost Efficiency: Self-supplied materials lower costs, while customized solutions cater to varying budgets.  

V. Service Coverage  

Based in Xinmi, Zhengzhou, the company serves clients across all provinces and municipalities in China, catering to industries such as metallurgy, buildingmaterials, and chemicals.