Low Sulfur 0.5-5mm 98.5% GPC

Low sulfur 0.5-5mm GPC is graphitized petroleum coke (GPC) supplied with 98.5% min fixed carbon and 0.05% max sulfur in a 0.5-5mm particle range. You can use it as a recarburizer when your process needs a high-carbon, low-sulfur carbon source and a graded size range that includes smaller particles.

0.5-5mm is a specific size grade. It is not the same as 1-5mm or 0-5mm material, so confirm the size range, the fines limit and the sulfur limit before you order.

Graphitized petroleum coke is made by heating petroleum coke to about 3000°C in a graphitizing furnace, generally an Acheson furnace. At this temperature the disordered carbon layers in the coke rearrange into ordered hexagonal graphite layers. This process is called graphitization, and it gives the material high fixed carbon and low impurities.

Min means the lowest accepted value and Max the highest accepted value. These are specification limits; the measured result for each batch is shown on the batch COA.

The three grades share a similar chemistry, so the size range and how you feed the material are the main differences. Use the table to narrow your choice, then confirm it by trial.

Fine particles dissolve faster but are easier to lose as dust or oxidation, especially on top of a hot bath. Larger particles dissolve more slowly and may not suit a late carbon adjustment. For a deeper comparison between graphitized and calcined materials, see GPC vs CPC: which fits your furnace.

For this grade, low sulfur means a sulfur limit of 0.05% max. Compare the number, not the wording, when you look at offers. You can estimate the sulfur this material adds as: addition mass × sulfur % ÷ melt mass. Illustrative arithmetic only: 3.6 kg of GPC at the 0.05% maximum added to 1,000 kg of metal adds at most 0.0018 kg of sulfur, about 0.0002% of the melt. Add this to the sulfur from your other charge materials and compare the total with your steel or iron grade limit.

For a graded size such as 0.5-5mm, agree before order how much of the batch must fall inside the range, and how much undersize (below 0.5mm) and oversize (above 5mm) is allowed. To check a delivery, take a representative sample, screen it, weigh each fraction and compare it with your order.

The batch COA reports chemical results such as fixed carbon, sulfur, ash, volatile matter and moisture. Particle size is checked by a separate screening result. Tell us which reports you need, such as the chemical COA, a screening record or third-party inspection, and we will confirm what can be provided before loading. For how to read these parameters, see how to evaluate graphitized petroleum coke quality.

Send Us Your GPC Size and Sulfur Requirement

Q: What is the difference between 0.5-5mm and 1-5mm GPC?

A: 0.5-5mm includes smaller 0.5-1mm particles, while 1-5mm has less fine material. The smaller particles contact the metal faster but are easier to lose as dust, so choose by your feeding method and confirm by trial.

Q: What sulfur limit does this GPC have?

A: 0.05% max. The measured sulfur of each batch is shown on the batch COA.

Q: Does 98.5% fixed carbon mean 98.5% carbon recovery?

A: No. Fixed carbon is a property of the material, while recovery is the share of added carbon that dissolves in the metal. Recovery depends on your furnace, addition method and particle size, so measure it on your own heats.

Q: Can you control the fines and oversize in 0.5-5mm GPC?

A: Agree the in-range share and the maximum undersize and oversize in your order, and confirm them by screening the batch.

Q: Which documents can you provide?

A: COA, MSDS, invoice, packing list and shipping documents. Tell us if you also need a screening record or third-party inspection, and we will confirm before loading.

Q: Can we visit the factory?

A: Yes. We welcome you to visit our factory; contact us to arrange a time.

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