A Case Study of Cement Clinker Dense Phase Pneumatic Conveying Project for a Building Materials Enterprise in Xiangyang, Hubei

Shandong Headpowder Engineering Co., Ltd. (brand name: headpowder) recently completed a highly efficient cement clinker dense phase pneumatic conveying system for a well-known building materials manufacturer located in Xiangyang, Hubei Province. This project serves as a benchmark example of how advanced dense phase conveying technology can reliably handle abrasive, high-temperature bulk materials while minimizing energy consumption and equipment wear. The client, a major producer of cement and building materials, required a robust solution to transport hot cement clinker from the kiln discharge point to the storage silos over a distance exceeding 200 meters, with a vertical lift of 15 meters. Traditional mechanical conveying methods such as belt conveyors or bucket elevators posed significant maintenance challenges due to the clinker's high temperature (up to 150°C), sharp particle edges, and dust generation. After evaluating multiple options, the client selected the dense phase pneumatic conveying system from headpowder, which has proven to be the most reliable and cost-effective approach for such demanding applications.

Project Overview and Core Requirements

The Xiangyang building materials enterprise operates a 5,000 tons per day cement production line, generating approximately 3,500 tons of cement clinker daily. The plant needed to convey the clinker from the cooler outlet to four concrete silos located 180 meters away, with a capacity of 15,000 tons each. The key challenges included: (1) high material temperature ranging from 80°C to 150°C; (2) abrasive nature of clinker, which quickly wears out conventional conveying equipment; (3) strict environmental regulations requiring zero dust leakage; (4) need for continuous operation 24/7 with minimal downtime. The headpowder engineering team conducted a thorough site survey and designed a customized dense phase pneumatic conveying system that uses compressed air at moderate pressure (2.5-4 bar) to push the material through a pipeline in a non-suspension mode. This method significantly reduces air velocity compared to dilute phase systems, thereby lowering pipe erosion and particle degradation. The system was designed to handle a conveying capacity of 80 tons per hour, with a line diameter of DN200 and a total pipeline length of 230 meters including bends.

Headpowder's Dense Phase Pneumatic Conveying Technology for Cement Clinker

Headpowder's dense phase pneumatic conveying system is specifically engineered for bulk materials like cement clinker, silica sand, fly ash, and other granular building materials. In this project, the cement clinker dense phase conveying technology was applied with a patented pressure vessel (blow tank) that features a bottom discharge and a specially designed air injection nozzle. The system operates in a batch mode: the blow tank is filled with clinker from a hopper, then pressurized with compressed air. Once the pressure reaches the set point, the discharge valve opens and the material is pushed into the pipeline in a plug flow pattern. This dense phase conveying method ensures that the material moves at low velocity (typically 4-8 m/s) while maintaining a high solids-to-air ratio (up to 30:1 by weight). Compared to dilute phase systems, the energy consumption per ton of material is reduced by 40-50%, and pipeline wear is dramatically decreased. The clinker dense phase conveying system from headpowder also incorporates an automatic pressure control loop that adjusts the air injection rate based on real-time material properties, ensuring consistent flow even when the clinker temperature or moisture content varies.

Key Advantages of the Installed System

The dense phase pneumatic conveying solution delivered to the Hubei site has demonstrated outstanding performance over the past six months of continuous operation. First, the system achieved zero dust emission at all transfer points, meeting the strictest environmental standards. Second, the pipeline wear rate was measured at less than 0.5 mm per year, significantly extending the service life of the conveying line. Third, the energy cost per ton of conveyed clinker was reduced by 35% compared to the previous mechanical conveyor system. Fourth, the system's PLC-based control allows remote monitoring and automatic start/stop sequencing, reducing the need for manual intervention. The client's maintenance team reported that the dense phase pneumatic conveying system requires only routine inspection of the blow tank seals and air filters, with no major breakdowns during the evaluation period. This case study clearly demonstrates that headpowder's dense phase pneumatic conveying technology is an ideal choice for conveying cement clinker and other building materials in harsh industrial environments.

Technical Specifications and Equipment Details

The complete system installed at the Xiangyang cement plant includes the following major components: a 3.5 m³ blow tank made of high-strength alloy steel with wear-resistant lining, a screw compressor with a capacity of 30 m³/min at 4 bar, a pipeline system of DN200 schedule 80 carbon steel pipe with ceramic-lined bends at critical wear points, a diverter valve to switch between four silos, and a PLC control panel with HMI touch screen. The system also includes a bag filter at each silo top to receive the transported material and separate the conveying air. The total installed power is 220 kW, and the system operates at a noise level below 75 dB(A). The design conveying distance is 230 meters, with a maximum vertical lift of 15 meters. The system can handle material temperatures up to 200°C with a special heat-resistant seal package. For the cement clinker dense phase conveying application, the material bulk density is approximately 1.2-1.5 tons/m³, and the particle size ranges from 0.5 mm to 30 mm, which is typical for clinker produced in modern rotary kilns.

Project Implementation and Results

The project was executed in three phases: design and engineering (4 weeks), equipment fabrication (8 weeks), and site installation and commissioning (6 weeks). The headpowder engineering team provided on-site supervision during installation and trained the client's operators on system operation and maintenance. During the commissioning phase, the system was tested at full capacity of 80 tons per hour, achieving a conveying ratio of 28:1. The client's project manager commented that the dense phase pneumatic conveying system from headpowder not only met but exceeded the performance expectations, especially in terms of material handling stability and dust control. The system has been running 24 hours a day, 7 days a week, with an availability rate of 99.5%. Based on this successful case, the client has already placed an order for a second identical system to expand the storage capacity. This cement clinker dense phase conveying project case study serves as a powerful reference for other building materials enterprises looking to upgrade their material handling systems.

Contact Information for headpowder

For more information about dense phase pneumatic conveying systems for cement clinker, building materials granules, or other bulk solids, please contact the experienced team at Shandong Headpowder Engineering Co., Ltd. The company's professional engineer, Mr. Zhang (Manager Zhang), is available to discuss your specific project requirements. You can reach him via WeChat at 15662777102. headpowder is headquartered in Shandong, China, and has successfully completed numerous dense phase pneumatic conveying projects across the cement, building materials, chemical, and metallurgical industries worldwide. Whether you need to transport cement clinker, limestone, sand, or any other granular material, headpowder provides customized solutions with proven reliability.