GPC Recarburizer For Foundries

Graphitized Petroleum Coke(GPC) is a high-purity carbon material produced at a temperature of 2500-3500°C. It has the characteristics of high fixed carbon content, low sulfur, low ash and low porosity. It is black in color, porous, in the form of accumulated granules, and cannot be melted.

Graphite Petroleum Coke has many excellent physical and chemical properties, such as high temperature stability, electrical conductivity, thermal conductivity and chemical stability. It is widely used in metallurgy, chemical and other industries as electrodes or raw materials for the production of chemical products.

Morceaux de coke de pétrole

De forme irrégulière, il est principalement utilisé dans les électrodes, la fusion des métaux et le combustible des centrales électriques. Il se caractérise par une densité élevée, une dureté élevée et de bonnes performances de combustion.

Particules de coke de pétrole

La forme est mince en forme d'aiguille. Il est principalement utilisé pour fabriquer des blocs de carbone anodiques et est utilisé dans l'aluminium, l'acier et d'autres industries. Il se caractérise par une structure dense, une conductivité thermique élevée et une bonne conductivité électrique.

Poudre de coke de pétrole

La forme est une poudre fine. Principalement utilisée pour fabriquer des produits chimiques tels que le noir de carbone et le charbon actif. Elle se caractérise par une grande surface spécifique et une forte réactivité.

Taille:1 à 15 mm ou sur mesure.
Autre nom :Recarburant/Granules de graphite/Graphite artificiel/Graphite synthétique
Emballer:Sacs de 25 kg en petits sacs d'une tonne ou sacs d'une tonne
Propriétés:Graphitisation, faible teneur en soufre et en azote, taux d'absorption jusqu'à 98%
Application:Fonte grise, fonte ductile ; en particulier fonte ductile haut de gamme, comme les vilebrequins, les arbres à cames, etc.

Graphite structure

After graphitization treatment, the lattice structure of graphite petroleum coke changes to form graphite material with graphite crystal structure. This gives it good layered structure and lattice stability.

Stabilité à haute température

Graphite petroleum coke can maintain structural stability in high temperature environments. It can withstand high-temperature thermal cycling and thermal shock and is not prone to melting or deformation, making it versatile in high-temperature applications.

Conductivity

Graphite petroleum coke is an excellent conductive material. Due to its layered structure and high degree of crystallinity, it has excellent electrical conductivity and can be used to manufacture electrodes, conductive materials, batteries, etc.

Thermal conductivity

Graphite petroleum coke has high thermal conductivity and can conduct heat quickly. This makes it widely used as a heat dissipation material or thermal conductive material in high temperature applications.

Chemical stability

Graphite petroleum coke has high chemical stability and can resist chemical corrosion and oxidation. This makes it widely used in corrosion resistance, refractory materials and chemical industries.

Low volatility

After graphitization treatment, most of the volatile components of graphite petroleum coke have been removed, so it has low volatility and low ash content.

Strength and hardness

Graphite petroleum coke has high strength and hardness, making it important in the fields of friction materials, abrasives and wear-resistant materials.

Manufacturing of graphite electrodes:

Graphite petroleum coke is the main raw material for manufacturing graphite electrodes. Graphite electrodes are widely used in electric arc furnaces for the production of steel, iron, silicon and other metals and alloys.

Graphite petroleum coke has high purity and high carbon content, which ensures the conductive properties and thermal stability of the electrode. Secondly, it has appropriate particle size and pore structure, which is beneficial to the shaping and graphitization process of the electrode. In addition, graphite petroleum coke also has lower ash content and good mechanical strength, which helps extend the service life of the electrode and reduce the impurity content during the smelting process.

For the electrolysis of aluminum:

Graphite petroleum coke has important applications as anode materials in the aluminum electrolysis industry. During the aluminum electrolysis process, the electrolyte solution in the electrolytic cell is activated by electric current, converting aluminum oxide into pure aluminum metal through an electrochemical reaction between the anode and cathode.

The use of graphite petroleum coke as anode material brings many advantages in the aluminum electrolysis industry. First, it can improve electrolysis efficiency and energy utilization and reduce production costs. Secondly, the stability and corrosion resistance of graphite petroleum coke anodes can extend the service life of the anode, reduce maintenance downtime, and improve production continuity and reliability. In addition, graphite petroleum coke anodes are environmentally friendly as they do not produce harmful gases or waste.

For Metallurgical Industry:

Graphite petroleum coke is the main raw material for graphite electrodes in the electric arc furnace smelting process. An electric arc furnace is a commonly used smelting equipment used for steelmaking, ironmaking and the production of other metals and alloys.

Graphite electrodes convert electrical energy into heat energy by conducting high current density, allowing the metal materials in the furnace to reach the required high temperature. As a key component of graphite electrodes, graphite petroleum coke can provide high electrical conductivity, high thermal stability and chemical stability, ensuring high efficiency of the smelting process and the output of high-quality products.

Customer Profile: A leading manufacturer of heavy-section, high-alloy steel castings for the mining, cement, and power generation industries (grades like CA-15, CA-6NM, Duplex Stainless).

Initial Challenge & Operational Pain Points:
They faced severe process control and safety issues:

Violent Slag Reactions: Their former fine, high-volatile-matter carbon raiser caused explosive slag foaming, posing a safety hazard to workers and damaging equipment.

Carbon "Kickbacks": Unpredictable dissolution led to frequent over-shooting of carbon targets, forcing costly re-melts or downgrading of high-value alloys.

Nitrogen Pick-up: Some carbon additives introduced high nitrogen levels, risking embrittlement in certain grades.

Our Technical Engagement & Solution:
We diagnosed the issue as a fundamental mismatch between material properties and process needs.

Product Recommendation: We supplied our Ultra-Low-Ash, Low-Nitrogen, Calcined Carbon Raiser. Its low volatile matter (<0.5%) eliminated the violent foaming. The low nitrogen (<100 ppm) was critical for their alloy grades.

Precision Particle Sizing: We provided material in a tightly screened 5-15 mm "nut" size. This ensured perfect sinkability through the AOD/Ladle slag, minimizing slag interaction while allowing controlled dissolution in the metal bath.

Technical Training: We held on-site workshops for their melt-shop crews on the importance of controlled addition rates and temperature management with our product.

Measurable Results & Long-Term Partnership:

Safety & Control: Slag foaming incidents were virtually eliminated (over 95% reduction), creating a safer work environment.

Yield & Quality Improvement: Carbon predictability improved dramatically. The incidence of heats outside the carbon specification range dropped by 75%, drastically reducing re-melts. Casting rejection rates due to nitrogen-related defects fell to zero for sensitive grades.

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