Alumina lithium battery powder conveying industrial ceramic Wear-resistant pipes are high-performance pipes designed for conveying powder materials during lithium battery production. They offer numerous advantages, detailed below:

Performance Features

· High Wear Resistance: Lined with high-purity Alumina ceramic, achieving a hardness exceeding HRA90, this pipe offers far superior wear resistance to ordinary steel pipes. It effectively withstands the high-speed impact of lithium battery powders, reducing pipe replacement frequency by 90% and significantly extending its service life.

· Strong Corrosion Resistance: The ceramic layer is chemically stable and exhibits excellent corrosion resistance to most acids, alkalis, and halogen gases, with the exception of hydrofluoric acid. This prevents metal ion leaching and contamination of raw materials, ensuring the purity of battery materials and contributing to improved battery consistency and safety.

· Smooth Inner Wall: The pipe's smooth inner wall with low surface roughness reduces material adhesion and clogging, ensuring smooth conveying. It also facilitates cleaning and effectively prevents material residue and cross-contamination. · Excellent thermal shock resistance: Alumina ceramics have a low thermal expansion coefficient, such as (6-8) × 10⁻⁶/°C, enabling stable operation over a wide temperature range and withstanding the temperature fluctuations experienced during lithium battery production.

· Lightweight design: Utilizing a composite structure, they are approximately 30% lighter than traditional Ceramic Tubes while maintaining high strength, facilitating on-site installation and layout optimization, meeting the efficiency requirements of lithium battery production lines.

Application scenarios

They are primarily used in the conveying of powder materials, such as positive and negative electrode materials, during the lithium battery production process, encompassing all steps from raw material delivery, loading, batching, mixing, sintering, to final packaging. They effectively ensure material purity and stable conveying, while reducing pipeline maintenance and replacement costs. Storage Conditions: Core Guarantees: "Clean, Dry, and Damage-Proof"

Lithium battery Powder conveying pipelines require extremely high cleanliness levels (avoiding metal dust, oil, and impurities). Furthermore, the Ceramic Lining is highly brittle, requiring focused control of the storage environment, stacking methods, and protective measures:

2. Stacking Specifications

· Classified Stacking: Pipes are stacked separately by specification (diameter, length) and type (straight pipe, elbow, tee) to prevent squeezing of pipes of different specifications. Label "Positive Electrode Only" and "Negative Electrode Only" to prevent cross-contamination (lithium battery positive and negative electrode powders must be strictly separated).

· Substrate Paving: First, lay 100mm thick wooden pallets on the ground (pallets spaced ≤1.5m apart to ensure levelness). Place 5mm thick food-grade rubber mats (odorless and dust-resistant) on the pallets to prevent direct contact between the pipes and the ground. · Stacking Height:

i. Straight pipes: Stacking height ≤ 2 layers (3 layers if a single pipe weighs ≤ 50kg). 10mm thick elastic rubber spacers must be placed between layers (this must be placed at the corresponding position on each pipe to prevent the upper pipe from crushing the ceramic lining of the lower layer).

ii. Elbows, tees, and other special-shaped pipes: Place them individually flat, using wooden blocks to secure the ends (rubber pads should be applied where the wooden blocks meet the pipe). Stacking or vertical placement is prohibited.

3. Protection and Regular Inspection

· Port Protection: Pipe flanges/ends must be fitted with thick, clean plastic protective caps (≥5mm thick, dust-free on the inner wall). Use clean tape to seal the caps and flanges to prevent dust from entering the pipe. · Regular Inspection: During storage, inspect once every 15 days, focusing on:

i. The integrity of the plastic protective cap, including any damage or detachment;

ii. The presence of rust on the outer metal pipe and cracks in the ceramic lining (this can be determined by tapping the pipe and listening for a crisp sound: a crisp sound is normal, while a dull sound indicates hollowing or cracking);

iii. Check the warehouse humidity and temperature for any excess humidity. If humidity is >60%, activate a dehumidifier.

· Storage Period: The recommended storage period for unmounted pipes is ≤6 months. After this period, retest the ceramic lining for bond strength (tensile shear strength ≥15 MPa) and cleanliness (wipe the interior with a dust-free cloth to ensure there is no visible dust). 2. Installation steps: The core principle is to follow "clean installation, ceramic protection, zero pollution" The installation of Lithium battery powder conveying pipelines must be carried out in a clean environment (such as the clean area of the lithium battery workshop, Class 10000 or above) to avoid the introduction of impurities and protect the ceramic lining from damage: 1. Preliminary preparation: cleanliness and material verification (1) Environment and tool preparation The installation area must be cleaned in advance, and a clean dustproof cloth must be laid on the floor. The concentration of suspended particles in the air must meet the workshop cleanliness standards (≥ Class 10000); Tools must be clean and oil-free: torque wrench, level, lifting belt (food-grade nylon material, dust-free), compressed air gun (connected to clean compressed air, filtration accuracy ≤0.1μm), dust-free cloth (no fiber drop), acetone (analytical grade, used to clean the flange surface). (2) Pipeline inspection and pretreatment

· Material verification: Confirm that the pipe specifications (diameter, length, flange standard) are consistent with the design drawings, and the marking "positive/negative pole only" matches the installation area. Mixing is prohibited;

· Appearance inspection: Remove the plastic protective cap and blow the inner wall of the pipe with clean compressed air (pressure 0.4-0.6MPa), then wipe the inner wall and flange sealing surface with a dust-free cloth dipped in acetone, and check:

i. The ceramic lining has no cracks, peeling, or hollowing, and the inner wall is free of dust and oil;

ii. The flange sealing surface is flat and free of scratches (roughness Ra≤3.2μm), and the bolt hole is not deformed;

· Pretreatment: If there are slight scratches on the flange sealing surface, gently polish it with clean sandpaper (400 mesh, dust-free), and then wipe it clean with acetone. 2. Hoisting and Docking: Avoid Ceramic Damage Due to Stress

· Hoisting Method: Use the "two-point hoisting method." Wrap the lifting strap (load-bearing capacity ≥ 1.5 times the pipe weight) around the outer metal pipe (1/3 of the length from each end). Avoid contact with the ceramic lining or flange sealing surfaces.

· Docking Accuracy:

i. Hoist the pipe onto a clean temporary support (with a clean rubber pad placed on the top of the support). Use a spirit level to align the pipe axis, with a deviation of ≤1mm/m (lithium battery transportation requires higher precision to avoid eddy currents during powder transportation and localized wear).

ii. When docking flanges, ensure flange hole alignment deviation ≤0.5mm and flange surface parallelism error ≤0.3mm. Do not force bolts through the flanges to avoid extrusion and cracking of the ceramic lining. 3. Connection and sealing: clean sealing, anti-leakage

(1) Flange connection (mainstream method, suitable for the disassembly and cleaning needs of lithium battery workshops)

1. Sealing gasket selection: Use polytetrafluoroethylene (PTFE) clean gaskets (no additives, no metal impurities, compliant with RoHS standards), the gasket specifications match the flange sealing groove, thickness 3-5mm;

2. Flange cleaning: Use a dust-free cloth dipped in acetone to wipe the flange sealing surface and gasket to ensure that there is no oil or dust;

3. Bolt installation:

· Bolts are made of 316L stainless steel (non-magnetic, no metal ion precipitation), and wipe the bolt surface with acetone before installation;

· Use the "diagonal step-by-step tightening method" to tighten to the design torque (e.g. DN100 pipe torque 150-200N·m) in 3 steps, and the torque of each step is the design value 1/3, after the last tightening, mark the bolt position with a marker (to facilitate later inspection to see if it is loose);

· Do not use lubricating oil to apply to the bolts (to avoid oil pollution). If the bolts are difficult to tighten, you can dip a small amount of analytical pure alcohol for lubrication.

· Welding connection (only for fixing pipes, such as long straight pipes)

· Use the "argon arc welding primer + manual arc welding cover" process, and use 316L stainless steel (food grade standard) as the welding rod. Clean the welding area with acetone before welding;

· During welding, clean argon gas (purity ≥99.999%) must be passed through the inside of the pipe to prevent oxidation of the welding area to produce metal dust; at the same time, wrap the ceramic lining side of the pipe with a clean wet cloth and keep the ceramic temperature ≤200℃ (to avoid the failure of the adhesive);

· After welding, use an angle grinder (with a clean grinding wheel) to grind the weld, and then wipe the weld and the surrounding area with acetone to ensure that there is no welding slag or oxide scale. 4. Acceptance and Cleanliness Inspection

· Visual Inspection: Check that the ceramic lining is free of cracks or peeling, that flange connections are not loose, and that welds are smooth and free of defects.

· Pressure Test: Introduce clean compressed air (1.25 times the operating pressure) and maintain pressure for 30 minutes. The pressure drop should be ≤ 0.05 MPa. The flanges and welds should be smeared with soapy water to ensure there are no bubbles or leaks.

· Cleanliness Inspection:

i. Wipe the inner wall of the pipeline with a dust-free cloth to ensure there is no visible dust (check under white light).

ii. Take a sample from the inner wall and send it to a laboratory for testing of metal ion content (Na⁺, Fe³⁺, Cu²⁺, etc., ≤ 1 ppm). This content must meet lithium battery raw material transportation standards.

· Labeling: Post "Positive Electrode Powder Transportation" and "Negative Electrode Powder Transportation" labels on the outer wall of the pipeline, indicating the installation date and responsible person.