The overall lead time for a full natural graphite spheroidization production line (raw material feeding → fine grinding → spheroidization → air classification → closed-loop recycling → dust collection) ranges from 6 to 18 months from contract confirmation to formal mass production. The exact cycle mainly depends on production capacity, process configuration, customization degree, and supporting auxiliary systems.
Lead Time by Production Capacity & Line Configuration
Two common configurations are classified: basic spheroidization line (core grinding + shaping + classification) and full-process anode-grade line (add high-purity purification, surface coating, inert gas protection and automatic control).
| Production Capacity | Basic Spheroidization Line | Full-Process Anode-Grade Line |
|---|---|---|
| Pilot scale (100–500 kg/h) | 6–9 months | 8–12 months |
| Small scale (500 kg/h–1 t/h) | 7–10 months | 9–14 months |
| Medium scale (1–3 t/h) | 8–12 months | 10–16 months |
| Large scale (3–5 t/h) | 10–14 months | 12–18 months |
Detailed Phase Breakdown of the Whole Project
1. Process Design & Engineering Confirmation (1–2 months)
Includes process flow design, parameter customization, workshop layout drawing, utility matching design, technical negotiation and contract finalization. Custom requirements for particle size distribution, sphericity and tap density will extend this phase slightly.
2. Equipment Manufacturing & Factory Pre-Acceptance (3–6 months)
Covers core spheroidization host, multi-stage air classifiers, ultrafine grinding units, wear-resistant lining components, dust removal systems and electrical control cabinets. The manufacturing cycle is longer for non-standard customized structures and high wear-resistant alloy parts. After production, offline no-load testing and performance inspection are completed at the factory.
3. Logistics, On-site Delivery & Installation (1–2 months)
Includes domestic transportation or international shipping, site foundation alignment, equipment positioning, pipeline connection, electrical wiring and auxiliary system assembly. Delays often occur if the factory site, power supply, water supply and dust emission infrastructure are not ready in advance.
4. Commissioning, Tuning & Product Qualification (1–2 months)
Cold commissioning (no-load mechanical operation) → hot commissioning (trial running with raw materials) → process parameter optimization. Adjust shaping cycle, airflow pressure, classifier speed to meet EV anode standards: qualified sphericity, narrow particle size distribution and stable yield.
5. Capacity Ramp-Up & Formal Acceptance (2–4 weeks)
Stabilize continuous operation, eliminate abnormal wear and material agglomeration, and finally reach full design capacity and stable batch quality.
Key Factors That Extend Lead Time
- High customization requirements: Strict limits on ultra-fine particle size, sphericity above 0.90, low oxygen content and ultra-low metal impurities.
- Extended process scope: Equipped with high-temperature purification, acid-base leaching, pitch coating and nitrogen protection atmosphere systems.
- High automation configuration: Integrated online particle size monitoring, automatic batching, SCADA data management and closed-loop intelligent control.
- Site and environmental constraints: Remote factory location, complex foundation construction, strict environmental protection and dust emission approval procedures.
- Supply chain cycle: Shortage of high-end wear-resistant materials, frequency conversion drive components and high-temperature refractory parts.
Fast-Track Solutions to Shorten Lead Time
- Adopt standard modular line design instead of full non-standard customization, which saves design and manufacturing cycle.
- Carry out site infrastructure construction and equipment manufacturing in parallel to compress overall schedule.
- Implement phased construction: put the core spheroidization and classification line into operation first, and add purification and coating modules in the later stage.
- Select standardized general-purpose components and mature process schemes to reduce repeated debugging time.
For most industrial medium-scale graphite spheroidization projects, reserve 12 months as a safe overall lead time; if requiring full-process high-purity anode-grade production, reserve 14–16 months in advance. Adequate pre-site preparation and reducing excessive non-standard customization are the most effective ways to avoid delivery delays.
