Artificial graphite is a high-purity carbon material widely used in lithium-ion battery anodes, refractories, conductive fillers, lubricants, and additive manufacturing. Because graphite particles are light, abrasive, and fragile, traditional mechanical conveyors often cause dust leakage, material degradation, and equipment wear. Pneumatic conveying provides a sealed, dust-free, and flexible transport method. It moves artificial graphite safely from storage to process equipment, supports automatic control, and is an ideal solution for modern graphite plants.

Custom artificial graphite pneumatic conveying systems include reverse-jet bag filters, rotary feeders, pipelines, diverter valves, mixing hoppers, level sensors, pressure transmitters, and PLC controls. Systems can be dilute-phase (high speed, low pressure) or dense-phase (low speed, high pressure). Dense phase is preferred for fragile graphite because it reduces particle collision, wear, and breakage. Air sources include Roots blowers, screw compressors, or nitrogen cylinders, selected by distance, capacity, and explosion protection needs.

Every solution is designed after testing the graphite sample. Artificial graphite bulk density is usually 0.4 to 1.0 g/cm3, with particle sizes from several microns to millimeters. We measure flowability, air permeability, attrition index, and angle of repose. Fine graphite powder requires low conveying velocity and pressure-resistant piping to avoid friction heat and static electricity. Granular graphite can be conveyed by vacuum to prevent dust leakage and then transferred under pressure to multiple receiving hoppers.

Equipment layout minimizes pipe length, bends, and height differences. Long-radius or ceramic-lined elbows reduce wear and material accumulation. Pipeline surfaces are smooth and wear-resistant. Receiving hoppers have vent filters and vacuum relief valves; discharge valves are double flap or rotary airlock types to prevent air leakage. The PLC automatically adjusts feeding frequency, conveying time, and pressure set points. It also records operation reports, alarm logs, and maintenance reminders.

Graphite dust can form explosive mixtures in air, so safety is critical. Our system includes explosion venting, static grounding, nitrogen inerting, and interlocking protection. All hoppers and pipelines are grounded. The dust collector uses anti-static filter media and monitors differential pressure. If pressure or dust concentration reaches a warning value, the system stops feeding and opens the safety valve. For high-risk areas, closed-loop nitrogen conveying with oxygen monitoring is recommended. The equipment meets GB, ISO, and CE standards.

Applications include raw material unloading, silo-to-silo transfer, batch weighing, mill feeding, classifier feeding, reactor feeding, and packing machine feeding. In lithium-ion battery anode production, the system transports artificial graphite from calcining furnace to crusher, crusher to classifier, and classifier to mixing silo, preventing metal contamination and maintaining stable quality. In refractory and carbon plants, it conveys artificial graphite aggregate and powder with binders under automatic batching. Conveying capacity ranges from 1 t/h to 50 t/h, with distances up to 500 meters.

Compared with bucket elevators and screw conveyors, our system has fewer moving parts, lower maintenance, less floor space, and better sealing. The enclosed process prevents moisture absorption and oxidation while reducing manual work. Our engineers provide site survey, process calculation, P&ID design, 3D layout, manufacturing, installation guidance, commissioning, and training. We supply spare parts such as filter elements, rotary feeder rotors, ceramic bends, sensors, and PLC modules. This ensures reliable production, low energy consumption, and long life.