99.5% Carbon Raiser GPC

Graphitized Petroleum Coke (GPC) is a carbon raiser produced by high-temperature graphitization of petroleum coke-based feedstock. In steelmaking and foundry operations, GPC supplies carbon to adjust the carbon content of molten steel or iron. Buyers should evaluate the material by its fixed carbon content, sulfur level, nitrogen content, ash, volatile matter, moisture and particle-size distribution.

The product is listed as 99.5% Carbon Raiser GPC, with a particle size of 1–5 mm in the original specification table. The appropriate grade depends on the target carbon content, furnace conditions, charging method and impurity limits of the finished metal. Before ordering, confirm the guaranteed chemical composition and particle-size distribution against the current product specification and batch-specific Certificate of Analysis (COA).

For steelmaking and foundry procurement, the purchase price per tonne is only one consideration. Carbon recovery, material losses, impurity contribution and the amount of carbon absorbed by the melt also affect the effective cost of carbon addition.

To understand how graphitized and calcined carbon additives differ, see our guide to GPC vs CPC for Different Furnace Requirements.

The following table retains the technical values provided in the original product listing. Confirm the fixed carbon value against the current COA before publication because the product title states 99.5%, while the original specification table states 98.5%. The nitrogen value and the status of the moisture and volatile-matter figures should also be verified against the actual product specification.

For foundry buyers, our guide on how to evaluate GPC quality explains which chemical and physical properties should be checked when assessing a carbon raiser.

When evaluating a carbon raiser supplier, buyers should confirm the actual product grade, chemical acceptance limits, particle-size requirements and inspection arrangements before placing an order. Product documentation should correspond to the grade and batch being supplied.

For supplier qualification, buyers can discuss product specifications, batch documentation, packaging and inspection requirements before confirming an order.

Graphitized Petroleum Coke can be considered for carbon adjustment in steelmaking and foundry melting. The correct grade depends on the required carbon increase, the charging method and the chemical limits of the final metal.

Steelmaking

For electric arc furnace steelmaking and other suitable steelmaking processes, buyers should specify the target carbon content and the maximum acceptable sulfur and nitrogen contributions. Particle size should match the charging method and available time for carbon dissolution.

Foundry Melting

For gray iron and ductile iron production, GPC may be used as a recarburizer during melting. Foundries should assess carbon recovery, sulfur input and the influence of the complete charge composition on the finished iron. A recarburizer should not automatically be treated as a substitute for a dedicated inoculant.

Particle-Size Selection

The listed 1–5 mm grade should be evaluated against the furnace charging method, particle-size distribution and acceptable fines content. Smaller particles and larger granules can behave differently during charging and melting, so the nominal size range alone does not establish carbon recovery.

Confirm the required packaging, bag weight and moisture-protection measures when requesting a quotation. Packaging options should be agreed before shipment according to the order requirements and transport conditions.

Q: What is the fixed carbon content of this GPC product?

A: The product title identifies it as 99.5% Carbon Raiser GPC, while the original specification table lists 98.5% carbon. Confirm the actual guaranteed fixed carbon value against the current product specification and batch COA before ordering.

Q: What sulfur content is specified for this GPC?

A: The original product table lists sulfur below 0.05%. Buyers should confirm that this limit is supported by the current product specification and COA before treating it as a guaranteed maximum.

Q: Why should nitrogen content be checked before purchasing?

A: Nitrogen requirements depend on the intended steel or iron grade and the process. The original listing reports nitrogen above 300 ppm, so the intended limit and test result should be confirmed before the value is used as a purchasing specification.

Q: How do I choose the correct particle size?

A: This listing specifies 1–5 mm. Confirm the sieve distribution and fines content, then evaluate whether the grade is suitable for your charging method, furnace conditions and carbon-adjustment requirements.

Q: Can I request a batch-specific COA?

A: Include your required chemical limits and inspection requirements in the quotation request. Confirm the availability of a COA that corresponds to the grade and batch being supplied.

Q: What information is needed for a GPC quotation?

A: Provide the required fixed carbon content, sulfur and nitrogen limits, particle size, quantity, packaging, destination port and intended application. This helps align the quotation with your purchasing requirements.

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