Graphitized petroleum coke (GPC) carbon raiser
Jiushun GPC recarburizer / carbon raiser is produced from petroleum coke by high-temperature graphitization (~2,800 °C). Standard grades ZW01–ZW04 list fixed carbon from ≥98.0% to ≥99.0%, sulfur (sulphur) ≤0.05%, and nitrogen 100–300 ppm. Particle sizes include 0–2 mm, 1–5 mm (most requested), 3–5 mm and 5–8 mm; other sizes on request.
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.
High-quality petroleum coke processed by high-temperature graphitization at approximately 2,800 °C into GPC (also called graphite petroleum coke, synthetic graphite recarburizer, carbon raiser or carburizer).
High fixed carbon, low sulfur / low sulphur (≤0.05% on ZW sheet grades), controlled nitrogen, designed for high absorption in molten iron.
Added in steelmaking and foundry practice to raise carbon in ductile iron, grey iron and cast iron; also usable as a chemical reducing agent.
Standard grades
ZW01
Highest fixed-carbon grade in the ZW series: F.C. ≥99.0%, S ≤0.05%, N 100 ppm.
ZW02
F.C. ≥98.5%, S ≤0.05%, N 200 ppm — mid-high carbon GPC grade.
ZW03
F.C. ≥98.5%, S ≤0.05%, ash ≤0.7%, N 200 ppm.
ZW04
F.C. ≥98.0%, S ≤0.05%, N 300 ppm — entry grade in the ZW series.
| 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.