Tongli Grate cooler Introduction

Tongli grate cooler is a type of industrial equipment used in our cement production plant to cool down and solidify hot clinker from the kiln. Clinker is a nodular material produced during the cement production process by sintering limestone and other materials at high temperatures in a rotary kiln. The kiln produces clinker at extremely high temperatures, and this clinker needs to be cooled rapidly and efficiently to prevent it from agglomerating or forming lumps, which could lead to difficulties in downstream processing and storage. This is where the grate cooler comes into play.

Tongli Grate cooler structure

Grate Bed: The main component of the grate cooler is the grate bed. This is a moving, perforated surface made of steel plates or castings. The hot clinker from the rotary kiln is spread evenly on this grate bed. The clinker moves along the bed by gravity, and as it travels, it's exposed to cooler air that comes from below.

Cooling Air Supply: A system of fans or blowers supplies ambient air into the cooler from below the grate bed. This cooling air flows upward through the clinker bed, removing the heat from the clinker and lowering its temperature.

Fans or Blowers: To ensure proper airflow, one or more fans or blowers are strategically placed in the cooler system. These fans create the necessary air circulation to efficiently cool the clinker. Sometimes, additional cooling air is blown directly onto the clinker as it moves along the grate bed.

Cooling Chambers: The grate cooler is typically divided into multiple cooling chambers or stages. Each stage consists of a portion of the grate bed where the clinker is exposed to cooling air. The clinker moves from one stage to another, with each stage having progressively cooler air flowing through it.

Water Spray System: In some modern grate coolers, a water spray system may be incorporated to enhance the cooling process. Water is sprayed onto the clinker in controlled amounts, promoting rapid cooling. The evaporative cooling effect of the water can significantly lower the clinker temperature.

Clinker Transport Mechanism: As the clinker progresses through the cooling stages, it's moved along the grate bed by a mechanical transport mechanism. This mechanism can consist of chains, rollers, and other components that ensure even and controlled movement of the clinker.

Clinker Discharge: Once the clinker has passed through all the cooling stages and reached an acceptable temperature, it is discharged from the grate cooler. The cooled clinker is then transported to storage or further processing.

Tongli Grate cooler design principle

Efficiency: The optimized grate bed partitions the air supply, precisely controls the air volume of each cooling area, and finally achieves high-efficiency cooling, high heat recovery efficiency, and remarkable energy-saving effect;

Sealing:High-efficiency new grate plate structure, with very little material leakage, reduces wear and tear of the grate plate and prolongs service life. The zipper machine runs intermittently to reduce failure rate and power consumption;The new structure of the sealing valve reduces air leakage. Simple structure and convenient maintenance;

Control: Perfect monitoring and control technology ensures more reliable grate cooler operation and stable kiln operation.

Compact structure: less space occupied, modular design, reduced installation cost, simple installation;

Specifications of tongli Grate cooler

Note: * Capacity is based on estimation of cement clinker.

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Zhejiang Tongli Heavy Machinery Manufacturing Co., Ltd (Formerly known as Tongxiang Coal&Mining Machinery Factory) established in year 1958 is a member of the Chinese National Building Material Machinery Association. Tongli is on the vendor list of designated production enterprise of the Ministry of Coal Industry. ISO9001、ISO14001、ISO45001 certified, accredited as High-tech & new technology enterprise of Zhejiang Province. With 65+ years of experience, Tongli has earned first class R&D and manufacturing capabilities, dedicated to provide satisfactory manufacturing equipments for global customers.   

Industry Knowledge extension

What is the application of grate cooler?

Grate coolers are designed to achieve uniform cooling of the clinker, the clinker is made by the process called calcination, after the clinker is cooled down, the clinker also needs to be ground using ball mill or vertical roller mill or high-pressure grinding roller or a combination of these to obtain the final product.

What is cement grinding plant?

A cement grinding plant is a facility that processes raw materials such as clinker, gypsum, and other additives to produce cement. Cement is a crucial building material used in various construction projects, and its production involves several stages, with grinding being one of the important processes.

The main components of cement are clinker and gypsum. Clinker is a nodular material produced by heating a mixture of limestone, clay, and other raw materials at high temperatures in a kiln. After the clinker is cooled, it is finely ground together with gypsum and other additives to produce the final cement product.

The cement grinding plant specifically focuses on the grinding of clinker into a fine powder. This process involves using various types of grinding mills, such as ball mills, vertical roller mills, or other specialized machinery. The purpose of grinding is to increase the surface area of the clinker particles, allowing for better hydration and development of cementitious properties when mixed with water. The addition of gypsum helps to regulate the setting time of the cement.

The ground cement is then transported and stored in silos, ready for distribution and use in construction projects. Cement grinding plants are often strategically located near cement markets to minimize transportation costs.