Equipment Specifications: φ2.4*24.2m 

This rotary cooler project, designed by Zhengzhou Mining Machinery for a client in Henan Province, is a significant application case in the field of special ceramic materials. As a core component of the 30,000 t/a fine ceramic alumina powder production line, its design process fully reflects Zhengzhou Mining Machinery's core technological advantages and engineering experience in rotary cooling equipment.

I. Scheme Design The client company mainly produces high-end ceramic raw materials such as magnesium aluminum spinel and α-alumina, requiring extremely high stability, cooling efficiency, and material quality control from the cooling equipment. The Zhengzhou Mining Machinery technical team first conducted on-site inspections and technical exchanges, establishing a design goal of "high efficiency and low energy consumption" based on the characteristics of alumina powder and the client's production capacity needs. Considering the special requirements of the alumina powder cooling process, a φ2.4×24.2m single-cylinder cooler was ultimately selected.

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II. Core Optimizations

1. Heat Exchange System: Employs a unique petal-shaped heat exchanger design. The outer jacket uses circulating water to control the cylinder temperature, while the inner layer optimizes the angle and structure of the lifting plates to create a specific airflow field, meeting material cooling requirements.

2. Optimized Infeed and Discharge Structure: The feed hood uses a sloping scoop method, with the chute inserted entirely into the cooler's feed end. Temperature and pressure measuring ports are located at the feed end, and a 1m screen opening is present in the cylinder at the discharge end. Both infeed and discharge seals utilize a three-layer flexible sealing structure (stainless steel fish scales + carbon silicon aluminum fiber composite plate + stainless steel fish scales) plus a labyrinth seal. Friction rings are present at the scale friction points of the cylinder.

3. Intelligent Control: Integrates a temperature sensor and a variable frequency speed control system, automatically adjusting the cylinder speed according to material flow to ensure uniform cooling.

Furthermore, during the equipment manufacturing stage, Zhengzhou Mining Machinery made a breakthrough by using a large vertical lathe for integrated cylinder machining and laser cutting technology to create irregularly shaped lifting plates. The equipment was installed in March 2025 and is currently in the commissioning and verification phase. The successful implementation of this project not only demonstrates Zhengzhou Mining Machinery's innovative capabilities in the field of special cooling equipment, but also provides an efficient and reliable process solution for the large-scale production of alumina ceramics.