Use case · GPC
GPC carbon raiser for foundry and cast iron
Jiushun supplies low-sulfur graphitized petroleum coke (GPC) as a foundry recarburizer / carbon raiser / carbon additive. Sheet grades ZW01–ZW04 list sulfur ≤0.05% and nitrogen 100–300 ppm; particle sizes include 1–5 mm and other ranges on request.
Common particle size in overseas enquiries: 1–5 mm. Other listed sizes remain available on the order.
| Grade | F.C. min | S max | Ash max | V.M. max | Moisture max | N |
|---|---|---|---|---|---|---|
| ZW01 | ≥99.0% | ≤0.05% | ≤0.5% | ≤0.5% | ≤0.50% | 100 ppm |
| ZW02 | ≥98.5% | ≤0.05% | ≤0.6% | ≤0.9% | ≤0.50% | 200 ppm |
| ZW03 | ≥98.5% | ≤0.05% | ≤0.7% | ≤0.8% | ≤0.50% | 200 ppm |
| ZW04 | ≥98.0% | ≤0.05% | ≤1.0% | ≤1.0% | ≤0.50% | 300 ppm |
Source: factory specification sheet. Indicators and particle sizes can be customised to the purchase order.
Procurement questions
- Is GPC the same as carbon raiser for foundries?
- Buyers search the same product as graphitized petroleum coke, graphite petroleum coke, GPC, recarburizer, recarburiser, carbon raiser, carbon additive or carburizer. Jiushun’s published fully graphitized grades are ZW01–ZW04; semi-graphitized grades are ZWS01–ZWS03.
- What sulfur level is listed for foundry grades?
- All four Jiushun ZW grades list sulfur at ≤0.05% (low sulfur / low sulphur) on the factory specification sheet. Confirm the contractual maximum on the purchase order and COA.
- Which size should cast iron shops start with?
- 1–5 mm is the size most often requested in overseas titles and enquiries. Confirm against your addition method; 0–2 mm, 3–5 mm and 5–8 mm are also listed.