Case Study of Dense Phase Pneumatic Conveying of Silicon Carbide for a Ceramic Enterprise in Xianyang, Shaanxi

This case study highlights a highly specialized engineering project undertaken by Shandong Headpowder Engineering Co., Ltd. for a leading ceramic manufacturing facility located in Xianyang, Shaanxi Province. The core objective of this project was to design, supply, and commission a complete dense phase pneumatic conveying system tailored specifically for the transportation of corundum (also known as fused alumina or emery) abrasives, which are extremely hard, sharp, and highly abrasive materials. The client required a reliable, low-wear, and energy-efficient solution to move these abrasive particles from storage silos to multiple processing points without degradation of the material or excessive damage to the conveying pipeline. Given the high hardness and angular shape of corundum particles, conventional dilute phase conveying was not feasible due to rapid pipe erosion and high energy consumption. Therefore, Shandong Headpowder Engineering Co., Ltd. proposed a custom-engineered dense phase system that operates at low velocity and high pressure, significantly reducing wear and tear while maintaining high throughput.

Core Products and Technologies: Dense Phase Conveying for Corundum and Ceramic Abrasives

The primary products involved in this project are the dense phase pneumatic conveying system for corundum, the ceramic abrasive conveying system, and the overall engineering solution for high-abrasive material transportation. The dense phase conveying technology utilized by Shandong Headpowder Engineering Co., Ltd. is specifically designed to handle bulk solids with high density, irregular particle shapes, and extreme abrasiveness. Unlike lean phase conveying, where particles are suspended in a high-velocity air stream, dense phase conveying moves materials as a compact plug or slug at low velocities (typically 2–8 m/s), which dramatically reduces pipe wear, particle degradation, and system maintenance costs. The system incorporates a specialized pressure vessel, advanced control valves, and a precisely metered air supply to ensure consistent material flow. For the ceramic abrasive application, the conveying line is lined with wear-resistant ceramic tiles or hardened steel to withstand the aggressive scouring action of the corundum particles. Additionally, the system includes a high-efficiency filtration unit to capture dust and maintain a clean working environment. This project demonstrates the company's expertise in designing custom solutions for high-abrasive material conveying, which is critical for industries such as ceramics, refractories, grinding wheels, and surface finishing.

Engineering Challenges and Custom Solutions for High-Abrasive Material Handling

Handling corundum and other high-abrasive materials presents unique engineering challenges. The particles have a Mohs hardness of 9, second only to diamond, and their sharp edges can quickly erode standard steel pipes, valves, and fittings. The ceramic enterprise in Xianyang required a system that could operate continuously for at least 12 months without major maintenance, with minimal material degradation and dust generation. Shandong Headpowder Engineering Co., Ltd. conducted a comprehensive material analysis, including particle size distribution, bulk density, angle of repose, and abrasiveness index. Based on these data, the engineering team designed a dense phase conveying system with a unique venturi-style feeder and a stepped pipe diameter configuration to maintain optimal pressure and velocity gradients. The system also includes a proprietary air injection mechanism that prevents material bridging and ensures uniform plug formation. The entire pipeline is constructed from heavy-duty schedule 40 or 80 steel pipes with internal ceramic lining applied via plasma spraying. Critical components such as diverters, bends, and discharge hoppers are fabricated using wear-resistant cast basalt or alumina ceramic inserts. The control system employs a PLC with HMI interface, allowing operators to adjust conveying parameters in real time based on material moisture content and production demands. This project successfully achieved a conveying capacity of 8–12 tons per hour over a distance of 150 meters, with a power consumption reduction of 35% compared to traditional dilute phase systems.

Advantages of Dense Phase Pneumatic Conveying for Ceramic Abrasive Transportation

The dense phase pneumatic conveying system implemented at this ceramic enterprise offers several distinct advantages over alternative methods. First, the low conveying velocity minimizes particle breakage, preserving the quality and size distribution of the corundum abrasives, which is critical for downstream ceramic tile polishing and grinding applications. Second, the reduced pipe wear extends the service life of the conveying system to over 3–5 years, compared to only 6–12 months for dilute phase systems dealing with similar materials. Third, the system operates at a higher solids-to-air ratio, resulting in lower compressed air consumption and reduced energy costs. Fourth, the enclosed design prevents dust emissions, improving workplace safety and compliance with environmental regulations. Fifth, the system can be easily integrated with existing storage silos, bag filters, and production machinery through a modular design. The client also benefited from the compact footprint of the dense phase system, which saved valuable floor space in the existing plant layout. Shandong Headpowder Engineering Co., Ltd. provided comprehensive after-sales support, including on-site installation supervision, operator training, and a one-year warranty on all wear parts. The project was completed within the scheduled 6-month timeline, and the system has been operating reliably for over 18 months as of the reporting date.

Application Scope and Industry Relevance of the High-Abrasive Material Conveying Engineering

This project serves as a benchmark for the transportation of high-abrasive bulk solids in the ceramics, refractories, and abrasives industries. The technologies developed and refined during this project are directly applicable to the transfer of silicon carbide, white corundum, brown corundum, zirconia, glass powder, and other abrasive granules. The dense phase conveying system is particularly suitable for applications where material integrity matters, such as in the production of high-end ceramic tiles, grinding wheels, sandpaper, and precision polishing compounds. Furthermore, the engineering methodology used here can be scaled up or down to meet the needs of both small workshops and large-scale industrial plants. Shandong Headpowder Engineering Co., Ltd. has since applied similar solutions to flour, cement, fly ash, and chemical powder handling, but the corundum project remains a flagship case due to its demanding material properties. The company continues to invest in R&D to improve wear resistance, automation, and energy efficiency of dense phase systems. For any enterprise facing challenges with abrasive material conveying, this project demonstrates that a custom-engineered dense phase solution is not only feasible but also cost-effective in the long term.

Company Profile and Contact Information

Shandong Headpowder Engineering Co., Ltd. (abbreviated as Headpowder) is a professional engineering firm headquartered in Shandong Province, China, specializing in the design, manufacture, and installation of pneumatic conveying systems, dust collection systems, and bulk solids handling solutions. With over 15 years of industry experience, the company has completed more than 500 projects worldwide, covering industries such as ceramics, chemicals, food, pharmaceuticals, and building materials. The company's engineering team includes experienced mechanical engineers, process engineers, and automation specialists who work closely with clients to develop customized solutions. The successful completion of the corundum dense phase conveying project in Xianyang, Shaanxi Province, further solidifies Headpowder's reputation as a reliable partner for high-abrasive material handling. For inquiries regarding dense phase conveying for corundum, ceramic abrasives, or any other high-abrasive materials, please contact the project manager, Mr. Zhang (Manager Zhang), via WeChat: 15662777102. Mr. Zhang can provide detailed technical specifications, case studies, and a preliminary system design based on your specific material and production requirements. Shandong Headpowder Engineering Co., Ltd. looks forward to collaborating with your organization to solve your toughest conveying challenges. Note: This article does not include any website links or other contact methods beyond the designated WeChat number. All project details are shared for informational purposes only.