I. Product Quality Assurance System

End-to-End Quality Control

Zhengzhou Kewe has established an end-to-end quality control mechanism covering the entire process from raw materials to finished products, specifically including:

Raw Material Control:

Each batch of raw materials entering the plant must undergo three types of sampling inspections (visual inspection, physical and chemical property testing, and test firing of sample blocks). Only after passing these inspections may the batch be procured.

After raw materials are received, stacked, and allowed to homogenize, those intended for sintering are sorted and screened before being fed into the kiln. Following sintering, they are graded and sorted according to technical specifications to produce aggregate and fine powder.

Materials that do not require sintering are screened, graded, and sorted according to technical specifications to produce aggregate and fine powder after being received, stacked, and allowed to homogenize.

Production Process Control:

Mixing Stage: Ingredients are blended strictly in accordance with the process ratios established by the Technical Department.

Semi-finished Product Inspection: Mass production may only commence after the first product has passed inspection. Semi-finished products are labeled with model number, unit weight, and production date. Quality inspectors check dimensions and visual defects in accordance with the technical requirements specified in the drawings and production process cards.

Drying and Sintering: A stepwise drying process is employed, and the sintering process strictly follows the sintering curve established by the Technical Department, with temperature differentials controlled within the specified range.

Finished Product Inspection: A 100% inspection system is implemented, covering appearance, dimensional accuracy, physical and chemical properties, and layer cracking. Inspection standards must meet both the company’s specifications and the technical requirements specified in customer contracts.

Technical and Equipment Support

Advanced Production Equipment: Equipment such as bauxite sintering kilns, Type 1620 Raymond mills, Type 2PGY1000*800 double-roll mills, 1,200-metric-ton fully automatic presses, and 160-meter high-temperature tunnel kilns enables fully automated control of batching, forming, and firing, with an annual production capacity of 80,000 metric tons.

R&D and Innovation: Through collaboration with numerous research institutes and other organizations, the company holds patented technologies such as the “Raw Material Screening and Iron Shavings Removal Device for Refractory Materials.” By 2025, new automated production lines will be added, and the intelligent control system will be upgraded.

Quality System Certifications: The company has obtained ISO 9001 Quality Management System, ISO 14001 Environmental Management System, and ISO 45001 Occupational Health and Safety Management System certifications. It implements a Chief Quality Officer system and has established a five-tier quality management capability enhancement pathway: “Experience Level – Inspection Level – Assurance Level -Prevention Level-Excellence Level” five-tier quality management capability enhancement pathway.

II. Measures to Enhance Customer Satisfaction

Customized Service Capabilities

Response to Needs: We provide three major categories of services—scenario customization, dimensional customization, and functional customization. Technical personnel develop solutions following on-site surveys and support expedited order processing.

One-Stop Solutions: We provide full-cycle services covering everything from refractory material selection, kiln design, construction, and installation to kiln drying and commissioning. Notable projects include the Dongfang Hope 4×60-meter active lime production line and the Shanxi Jincheng Fusheng Steel sleeve kiln, both of which were turnkey projects.

After-Sales Service System

Rapid Response Mechanism: 24/7 online customer service is available, with engineers directly handling after-sales issues and a commitment to “resolve customers’ frontline problems in a timely manner.”

Full Lifecycle Management: We establish comprehensive customer records and provide installation guidance, operational training, regular follow-up visits, product storage recommendations, and testing support for products past their warranty period.

Complaint Handling Process: We accept complaints through multiple channels, including phone, email, and online customer service, and follow a standardized “Registration–Assessment–Investigation–Solution–Verification–Archiving” process to ensure closed-loop management of customer feedback.

Customer Case Studies and Reputation

Industry Coverage: We have served over 1,300 enterprises across industries such as steel, cement, chemicals, and power, including major companies in the steel and glass sectors.

Customer Feedback: Our products are characterized by the “Three Resistances, Three Lows, and Two Excellences” (resistance to high temperatures, corrosion, and pressure; low porosity, low re-firing shrinkage, and tight dimensional tolerances; good external appearance, and good cross-section) as core metrics. They have established industry-leading solutions for technical challenges such as addressing hollow voids in refractory bricks and preventing cracking in castables.

III. Continuous Improvement Mechanism

Quality Improvement: A system of decadal and monthly performance reviews for department heads, coupled with quality cost control assessments, reinforces the accountability system. Combined with automated controls, this reduces human error and enhances product consistency.

Technical Upgrades: We have introduced a performance management model and implemented quality diagnostics and improvements, proposing 470 corrective measures for 16 enterprises.

Customer Feedback-Driven Approach: We regularly collect customer usage data to optimize product formulations and construction processes. For example, we introduced a specialized solution to address hollow spots in refractory bricks, thereby improving the masonry pass rate.

Ⅳ.Summary

Through end-to-end quality control, technological innovation, customized services, and a rapid-response after-sales system, Zhengzhou Kewe Refractories has established a three-pronged management model centered on “Quality Assurance—Customer Service—Continuous Improvement.” Its core competitiveness lies in combining strict production standards with flexible customer needs. Drawing on over 40 years of industry experience and practical insights from more than 1,300 clients, the company has developed comprehensive quality assurance capabilities across the entire value chain—from raw materials to services.