Semi-graphitized petroleum coke ZWS01–ZWS03
Jiushun publishes semi-graphitized petroleum coke carbon additive grades ZWS01–ZWS03 on the factory sheet: fixed carbon ≥98.0%–≥98.5%, sulfur ≤0.20%–≤0.30%, nitrogen 300–500 ppm by grade, processed at approximately 1,700–2,700 °C. Particle sizes include 0–2 mm, 0–5 mm, 1–3 mm, 1–5 mm, 2–8 mm and 5–8 mm; other sizes on request. Sulfur is higher than fully graphitized ZW01–ZW04 (≤0.05%).
Semi-graphitized petroleum coke is produced in a calcining / graphitization temperature range of approximately 1,700–2,700 °C (factory sheet).
High fixed carbon, moderate sulfur versus fully graphitized ZW grades, designed for cast-iron carbon addition with a cost-performance focus.
Widely used as a cast-iron recarburizer / carbon additive where published ZWS sheet grades meet the melt shop target.
| Grade | F.C. min | S max | Ash max | V.M. max | Moisture max | N |
|---|---|---|---|---|---|---|
| ZWS01 | ≥98.5% | ≤0.20% | ≤0.8% | ≤0.7% | ≤0.50% | 300 ppm |
| ZWS02 | ≥98.5% | ≤0.24% | ≤0.7% | ≤0.8% | ≤0.50% | 300 ppm |
| ZWS03 | ≥98.0% | ≤0.30% | ≤1.0% | ≤1.0% | ≤0.50% | 500 ppm |
Source: factory semi-graphitized specification sheet. Sulfur on ZWS grades is higher than on fully graphitized ZW01–ZW04 (≤0.05%). Confirm contractual limits on the purchase order.
For fully graphitized low-sulfur grades, seeZW01–ZW04. Indicators and sizes outside the ZWS table are quoted against the buyer’s written targets.
Indicators and particle sizes can be adjusted to the buyer’s written specification. Listed sizes: 0–2 mm, 0–5 mm, 1–3 mm, 1–5 mm, 2–8 mm, 5–8 mm; other sizes (for example 0–1 mm) on request.