Application of Dual-Tube Spiral Weighing Feeder in Fly Ash Conveying and Metering

Fly ash is widely used in the building materials industry. It can be used as an admixture for cement, mortar, and concrete, becoming a component of cement and concrete. Fly ash can also serve as a raw material to replace clay in the production of cement, manufacturing sintered bricks, hollow bricks, and other sintered products, as well as for road paving. During the application of fly ash, it is essential to convey, meter, and control it quantitatively to complete the proportioning of cement, concrete, and other materials. Moreover, the material characteristics of fly ash need to be maintained in the production process.

Fly ash particles are extremely small and fine, capable of flowing in the air and being collected by specialized equipment. However, the conveying process faces various issues, including sealing and fluidity. To ensure accurate proportioning, it is crucial to maintain the material characteristics of fly ash during conveying.

Considering the characteristics of fly ash, open-type quantitative feeders are not suitable for conveying due to the exposure of fly ash to air. Sealed conveying equipment should be utilized instead. Open-type conveying methods for fly ash mainly present the following problems: (1) Fly ash exposed to air may absorb moisture, altering its characteristics; (2) Small fly ash particles can enter the air, affecting the on-site working environment, polluting the air, and endangering the health of on-site personnel; (3) Both fluidity and airborne particles can result in material loss.

Apart from the issues during conveying, metering during the process also poses challenges, primarily due to the fluidity of fly ash. When fly ash falls from the discharge port, it rapidly passes through the weighing area, increasing metering errors.

Therefore, in the production process using fly ash as a raw material, equipment with good sealing performance, stable flow control, and high metering accuracy is required for conveying, metering, and proportioning. Based on rich experience in production proportioning and dynamic weighing, as well as advanced technology, GuoNuo Technology has designed and manufactured the Dual-Tube Spiral Weighing Feeder. This feeder meets the requirements for conveying, metering, and proportioning of fly ash and is suitable for conveying powdered and granular materials like fly ash.

The Dual-Tube Spiral Weighing Feeder uses a sealed spiral tube to convey fly ash. With precision manufacturing, it effectively seals the material from external contact, ensuring unchanged material characteristics and preventing it from entering the air. This optimizes the production environment and avoids issues such as fly ash spillage, addressing the problems faced in open-type conveying.

Structurally, the GuoNuo Dual-Tube Spiral Weighing Feeder adopts a double-layer design. Fly ash falling from the discharge port enters the upper spiral tube for flow stabilization before entering the lower spiral tube stably, uniformly, and continuously. The lower spiral tube is responsible for material conveying and dynamic weighing. The upper and lower spiral tubes are synchronized for speed adjustment, preventing material rush and ensuring accurate metering without the influence of fly ash fluidity.

Additionally, the Dual-Tube Spiral Weighing Feeder employs advanced dynamic weighing technology with direct digital weighing sensors for stable and accurate signal output, resulting in higher metering accuracy. The feeder uses a frequency conversion speed regulator for precise feed control and adopts a DCS control mode for decentralized control and centralized management, facilitating convenient operation and management.

In summary, the Dual-Tube Spiral Weighing Feeder is suitable for fly ash conveying and proportioning in terms of design, manufacturing, and technology. It improves the on-site environment and enhances the efficiency of fly ash proportioning.