I. Product Definition
Isostatic pressure graphite box, also known as graphite crucible, graphite material box, or graphite square box, is made by CNC processing of high-purity isotropic isostatic pressure graphite. It is specifically used for the high-temperature graphitization, carbonization, and baking processes of lithium battery negative electrode materials such as artificial graphite, natural graphite, and silicon-carbon negative electrodes. It is the core load-bearing consumable of the negative electrode graphitization furnace.
II. Core Features (Special for Anode Graphitization)
1. High-quality material, isotropic stability
It uses cold isostatic pressure graphite, with uniform internal structure and no directional nature;
High density, fine grains, does not warp, deform, or collapse at high temperatures;
Extremely low thermal expansion coefficient: 2.0–3.5×10⁻⁶/℃, highly resistant to thermal shock, and does not crack after repeated heating and cooling.
2. Resistant to ultra-high temperatures, suitable for graphite chemical conditions
It can work continuously at 2600–2800℃;
Does not soften, melt, or creep at high temperatures, fully meeting the requirements of ultra-high temperature graphitization processes for negative electrodes.
3. High purity, low ash content, no contamination of negative electrode materials
High-purity graphite material, with extremely low ash content and few metal impurities;
High temperature without volatilization, no powder shedding, no element precipitation, and will not affect the first efficiency, capacity, and cycle life of the negative electrode;
Suitable for high-purity production requirements of high-end power, energy storage, silicon-carbon negative electrodes, etc.
4. Uniform heat conduction, good consistency of material graphitization
Excellent graphite thermal conductivity, uniform temperature field distribution inside the box;
The degree of graphiteization of materials inside the box is consistent, batch stability is high, and the yield rate is improved.
5. Dense structure, no material leakage, no powder seepage
High closed-cell rate, dense structure;
Negative electrode fine powder does not penetrate, does not run out, does not stick to the wall, discharging is clean, raw material loss is low, and cleaning is convenient.
6. High compressive strength, can be stacked multiple layers
High mechanical strength at high temperature, strong load-bearing capacity;
Can be stacked multiple layers in the furnace, without cracking or deformation, significantly improving the utilization rate of the furnace space and increasing the single-furnace production capacity.
7. Can be treated for oxidation resistance, longer service life
Can be treated with special oxidation impregnation / coating;
Effectively reduces high-temperature oxidation and burning loss, significantly increases the number of cycle uses, and reduces the cost per ton of negative electrode consumables.
8. Size can be customized, structure is flexible
Can be customized as square, rectangular, with compartments, with cover plates, integrated / assembled;
High dimensional accuracy, small stack fitting gap, suitable for various furnace types such as pusher continuous carbonization furnaces, box furnaces, and internal string furnaces for graphiteization.
9. Long service life, low comprehensive cost
Far superior to ordinary molded graphite boxes and carbon material boxes;
More cycle uses, low breakage rate, reducing downtime for changing molds, reducing labor costs, and lower long-term comprehensive usage cost.
III. Applicable Industries & Application Scenarios
1. Lithium battery negative electrode material industry (core)
Artificial graphite negative electrode, natural graphite negative electrode
Silicon-carbon negative electrode, composite negative electrode, hard carbon / soft carbon anode materials
Application processes: pre-carbonization, high-temperature baking, 2600–2800℃ graphitization
2. New energy materials industry
Energy storage battery negative electrode materials
Power battery, consumer battery high-end anode raw material sintering and graphitization
3. Carbon new materials industry
Carbon nanomaterials, high-purity carbon, conductive carbon materials high-temperature heat treatment
Special carbon, functional carbon materials baking bearing
4. High-temperature metallurgy and new materials
High-purity powder material high-temperature sintering
Rare metal powder, carbide powder vacuum / atmosphere high-temperature treatment
5. Supporting furnaces
Negative electrode internal string graphitization furnace
Pusher continuous carbonization furnace
Box-type high-temperature graphitization furnace
Atmosphere sintering furnace, vacuum high-temperature furnace
IV. Summary in one sentence
The isostatic pressure graphite box, with high purity, high-temperature resistance, low thermal shock and deformation, uniform heat conduction, no contamination of negative electrode materials, multi-layer stacking advantages, long service life, is currently an indispensable core load-bearing consumable for lithium battery anode graphitization production, widely used in the lithium battery industry chain, including power batteries, energy storage, silicon-carbon negative electrodes, etc.
Our Core Advantages
1. Raw Material Advantage: Source Control
We select high-purity / ultra-high-purity isostatic pressed graphite raw materials from the original factory, with a fixed long-term supply chain. The density is stable, with low ash content, few impurities, and uniform grains. This ensures that the products have high temperature resistance, heat shock resistance, long lifespan, and do not contaminate materials from the raw material source.
2. Process and Precision Processing Advantage
We have a complete set of CNC precision numerical control processing lines, including turning, milling, drilling, grinding, and integrated forming. The processing accuracy is high, the size tolerance is small, and the surface fit is good. We can precisely customize non-standard parts, large components, and high-difficulty structures, and customers do not need to make secondary modifications.
3. Product Performance and Quality Advantage
The products have inherent characteristics such as low thermal expansion, high mechanical strength, no deformation at high temperatures, and no cracking under sudden cooling and heating. They can be treated with special oxidation resistance, high-purity purification, and surface impregnation. The service life is 30% - 50% higher than that of ordinary manufacturers' similar products. They do not lose powder, do not leak materials, and do not have impurity precipitation at high temperatures.
4. Professional Customization and Scheme Design Advantage
We have a professional technical team. Based on different working conditions such as vacuum furnaces, graphiteizing furnaces, sintering furnaces, metal melting, 3D glass hot bending, etc., we provide free selection matching, thermal field design, structural optimization, and drawing customization. Non-standard non-standard shapes, special sizes, and special power can be one-on-one customized with solutions.
5. Full Category One-stop Supply Advantage
Main products cover:
Graphite heaters, graphite insulation boards / insulation tubes, graphite crucibles, graphite boxes / crucible cases, 3D glass hot bending graphite molds, complete graphite thermal field accessories for high-temperature furnaces.
One-stop procurement is provided, eliminating the need for multiple price comparisons and multiple connections, saving time and effort.
6. Adequate Capacity and Stable Delivery Time
We have a large-scale production base and have a large stock of graphite raw materials. Standard specifications are available for immediate dispatch, and custom parts have a mature production schedule and controllable cycle. We support urgent orders and do not delay the equipment commissioning and mass production progress of customers.
7. High Cost Performance and Factory Direct Supply
The original factory self-produces and sells, without middlemen's price hikes. Under the same material, the same process, and the same precision, the price is more advantageous. The products have a long service life, low wear, and low replacement frequency, helping customers significantly reduce long-term consumables and production costs.
8. Deep Industry Experience and High Customer Recognition
We have been deeply involved in the high-temperature industrial graphite products industry for many years, focusing on serving lithium battery negative electrodes, photovoltaic semiconductors, vacuum heat treatment, metallurgical melting, 3D glass, and new materials research and development fields. We have long-term stable cooperation with many equipment manufacturers and material manufacturers. The quality has been verified through large-scale mass production.
9. Complete Technical After-sales Service
Free selection suggestions, compatibility assessment, installation guidance, and usage maintenance plans are provided. In case of usage problems, we respond quickly and provide maintenance, repair, replacement, and optimization solutions. We provide full technical support and have a guaranteed after-sales service.
