Calcined Petroleum Coke

Anode & recarburiser grade by real density and S

Calcined petroleum coke is green coke that has been through a rotary kiln or hearth at 1,200–1,350°C, and calcination changes what you are buying entirely. Volatiles are driven off to ≤ 0.5% VCM, moisture to ≤ 0.5%, fixed carbon rises to ≥ 98.5%, and — the number that actually matters — real density lifts to 2.04–2.08 g/cm³. Real density is the anode industry's master specification because it predicts baked-anode density, electrical resistivity and carbon consumption in the pot. Alongside it sit sulphur (1–3.5% for anode grade, ≤ 1% for premium recarburiser and TiO₂ work), ash (≤ 0.4%), and the trace metals that a smelter treats as gating: vanadium, nickel, sodium, calcium and silicon, because vanadium catalyses airburn on the anode and sodium drives carboxy reactivity. Nobody who buys CPC buys it on calorific value.

The fuel-grade versus calcined decision is not a grade choice within one market — they are two different trades. Fuel-grade green coke is a thermal fuel bought for kcal per dollar and burned. CPC is a carbon raw material bought for structure and purity: roughly 0.4 tonnes of it goes into every tonne of primary aluminium as prebaked anode, and the rest of the market is steel and foundry recarburising, titanium dioxide chloride-route reduction, carbon and graphite products and silicon carbide. That is why CPC prices at a multiple of fuel grade — you are paying for the calcination energy, the yield loss and the sulphur and metals selection of the green feed, not for heat. CBIL brokers calcined coke from US, Saudi and Chinese calciners against SGS certification of real density, fixed carbon, sulphur, ash, VCM, moisture and the full trace-metals panel, in bulk Handysize and Supramax parcels on FOB and CFR terms. Send your real-density floor, sulphur ceiling and vanadium and sodium limits, and we will work supply against them rather than against a generic anode-grade sheet.