Mineral powder pneumatic conveying

Mineral powder pneumatic conveying technology is a process method that uses air as the conveying medium and utilizes the energy of airflow in a closed pipeline network to achieve continuous transportation of mineral powder. Its essence is to convert the kinetic energy or static pressure energy of air into the kinetic energy of materials, so that mineral powder particles and air form a mixed flow state, complete long-distance migration in the pipeline, and ultimately achieve the separation of gas-solid phases. Compared to traditional mechanical conveying, the core advantage of this technology is that the entire pipeline is sealed, fundamentally solving the problem of dust pollution caused by fine particle size of mineral powder, while also avoiding material loss during the conveying process. The operation logic of the entire system can be divided into three core stages, forming a complete material conveying loop: the first stage: the feeding and mixed mineral powder are usually stored in the silo or hopper and cannot directly enter the conveying pipeline. The system uses a specialized feeding device to control and evenly feed the mineral powder in the warehouse into the airflow of the pipeline. The feeding device needs to break the agglomeration force between mineral powder particles, so that they can be effectively carried or pushed by the airflow. For fine particulate materials such as mineral powder, this stage determines whether the subsequent transportation is smooth and is the first hurdle to prevent pipe blockage. Phase 2: Transport and migration inside the pipeline, with the mineral powder moving along with the airflow. According to the different airflow velocity and pressure, mineral powder exhibits different motion states such as suspension, sliding, or clogging in the pipeline. The entire transportation process is carried out in a completely sealed pipeline, which not only protects the surrounding environment from dust pollution, but also protects the mineral powder material itself from external impurities, ensuring the purity of the material. Phase Three: Separation and Dust Removal After the gas mixture reaches its destination, the mineral powder must be separated from the air. This process is usually completed in a separator, where mineral powder settles from the airflow under the action of gravity or centrifugal force and falls into the storage equipment; The exhaust gas carrying a small amount of dust will enter the dust removal equipment for purification treatment, and the final clean air that meets the standards will be discharged into the atmosphere. In order to adapt to different mining powder conveying conditions, pneumatic conveying systems are mainly divided into the following three mainstream technical solutions, and the core difference in their working principles lies in the direction of the power source and the airflow state: Solution 1: Negative pressure pneumatic conveying Working principle: The power source of the system is installed at the conveying endpoint. By extracting air from the pipeline, a negative pressure environment below the external atmospheric pressure is formed inside the entire conveying pipeline. Under the action of atmospheric pressure, the external air carries mineral powder and is "sucked" into the pipeline, flowing towards the endpoint. Core feature: Due to the negative pressure inside the system, even if there is a small leak in the pipeline, external air will flow in without any mineral powder spraying out. Therefore, this scheme performs the best in dust control and is particularly suitable for scenarios involving multi-point material collection and single point unloading. Option 2: Working principle of positive pressure pneumatic conveying: Roots blower or air compressor is installed at the starting point of the conveying. The fan presses air with a certain pressure into the pipeline, and uses the thrust of positive pressure airflow to "push" the mineral powder from the starting point to the ending point. Core feature: Positive pressure system can provide greater conveying power, so the conveying distance and amount are usually better than negative pressure system. It is very suitable for a layout of single point feeding and multi-point unloading, that is, distributing mineral powder from one silo to multiple locations

• Multi point collection and transportation of electric dust and ash in ISP process of metallurgical plant
• Single point feeding of mineral powder processing line to multiple equipment
• Cross line transportation from limestone powder workshop to railway loading point
• Mineral powder processing, recycling, and transportation