Graphite Petroleum Coke For Ductile Iron

Graphite Petroleum Coke serves as premium carbon raiser specially for ductile iron production. Raw petroleum coke undergoes graphitization treatment at over 3000℃. Carbon atoms rearrange and form well-ordered layered graphite crystal structure. Compared with ordinary carbon additives, it features developed graphite structure and excellent wettability in molten iron, acting as an essential raw material for high-quality ductile iron manufacturing.

                                                                                                                                      1-5mmGPC

• High Purity & Low Impurity Fixed carbon ≥98.5%. Strict control on sulfur, nitrogen, ash and volatile matter. Extremely low harmful impurities prevent blowholes and inclusions inside castings.
• High Carbon Absorption Rate Fast dissolution speed, stable carbon absorption rate above 90%. Carbon precipitates into ideal graphite shape and minimizes carbon fluctuation during melting.
• Optimized Metallographic Structure Boost ferrite formation, improve the shape, size and distribution of graphite nodules, enhance elongation and toughness, and stabilize mechanical properties of ductile iron.

1. Stable Carbon Addition & Consistent Quality Dissolve rapidly in molten iron, narrow carbon fluctuation range, reduce defective rate and guarantee consistent quality in mass production.
2. Improved Mechanical Performance Tensile strength of castings increases by 30%~50% compared with common gray iron. Elongation and yield strength are greatly improved for heavy-duty components.
3. Lower Comprehensive Smelting Cost Reduce consumption of pig iron and scrap steel to optimize furnace burden. Gentle reaction slows lining corrosion and extends furnace service life.
4. Low Sulfur & Low Nitrogen, Eco-friendly Sulfur: 0.03%-0.05%, Nitrogen: 50-300ppm. Less harmful emissions during melting, compliant with environmental protection standards.

• Automotive Industry: High-strength wear-resistant ductile iron parts including crankshaft, camshaft, brake disc and chassis components
• Machinery Manufacturing: Cylinder liners, gears, hydraulic valves and other precision castings
• Infrastructure: Ductile iron pipes, anti-corrosion valves and pipe fittings
• Emerging Industries: Raw material for lithium ion battery anode and graphene production

Packing Details:

25kg small bags into one jumbo bag or 1mt jumbo bag or according to customers' requirements

Port: Tianjin Port, Qingdao Port

Leading Time: Shipped in 15-30 days after payment

Payment

Preferred payment terms: T/T, L/C, D/P. Western Union and PayPal are negotiable.

Shipping

International Express (DHL/UPS/FedEx): Door to door, 5-7 days, suitable for samples & small trial orders

Air Freight: 3-4 days transit time for urgent small shipments

Sea Freight: 15-30 days, cost-effective for bulk regular orders

Process Reference It is recommended to add graphitized petroleum coke into the furnace together with scrap steel and pig iron at the early melting stage with sufficient stirring. Particle size can be adjusted according to furnace capacity. Multiple small additions help stabilize carbon absorption rate and avoid graphite floating and carbon segregation.

Sample Service Small trial samples are available for customers' melting tests to verify performance in advance. Freight cost for samples can be negotiated. Sample charge can be deducted from formal bulk orders upon confirmation.

Q1: What are the core advantages of graphitized petroleum coke versus ordinary calcined petroleum coke?

A: Raw material is graphitized above 3000℃ to form ordered graphite crystal structure. It dissolves faster in molten iron with stable absorption rate over 90%. It optimizes graphite nodule formation and reduces casting defects such as blowholes and inclusions, which is ideal for high-grade ductile iron. Ordinary calcined coke has low graphitization degree and poor carbon absorption, which may harm casting metallographic structure.

Q2: What defects will high sulfur and nitrogen content bring to ductile iron castings?

A: Excessive sulfur consumes nodulizer and deforms graphite nodules. Excessive nitrogen easily causes blowholes. Our low-sulfur & low-nitrogen characteristic effectively avoids these common production troubles.

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