17/04/2026
Application and Technical Specifications of Metallurgical Grade Foundry Coke in Foundry Industry
1. Application Scope of Metallurgical Grade Foundry Coke in Foundry Industry
Metallurgical grade foundry coke is the core fuel and reducing agent in foundry production, mainly applied to cupola melting process. As an indispensable raw material for ferrous and non-ferrous foundry industry, it is widely used in the melting and production of various castings.
In cast iron production, it provides stable high-temperature heat source for the melting of gray cast iron, ductile iron, malleable iron and other castings, maintains the thermal balance in the furnace, and acts as a carbon additive to accurately adjust the carbon content of molten iron, optimize its metallurgical properties, and ensure the mechanical properties and molding quality of castings. In the field of non-ferrous casting, it is mostly used for melting and heating of copper, aluminum and other non-ferrous metal castings. With stable combustion characteristics, it ensures uniform metal melting and improves the density of castings.
In addition, metallurgical grade foundry coke is suitable for large-scale production of various industrial and civil castings, such as engineering machinery castings, auto parts, machine tool castings, pipeline fittings, and precision machinery castings. It is compatible with large, medium and small cupolas, meeting the melting production needs of castings with different specifications and precision, and is a key material to ensure efficient and stable operation of foundry production.
2. Core Technical Indicators of Metallurgical Grade Foundry Coke (in accordance with GB/T 8729-2017)
The technical indicators of metallurgical grade foundry coke directly determine the melting effect and casting quality, which shall strictly comply with national standards. The core indicators are divided into superior grade, first grade and second grade, with specific parameters as follows:
1. Particle Size: 60-80mm, 80-120mm (suitable for conventional foundry melting with good air permeability)
2. Fixed Carbon: Superior grade ≥88%, first grade ≥86%, second grade ≥84%. Higher fixed carbon content brings higher calorific value and more stable heating efficiency
3. Ash Content: Superior grade ≤8.00%, first grade ≤10.00%, second grade ≤12.00%. Low ash content reduces impurities and avoids affecting casting purity
4. Sulfur Content: Superior grade ≤0.60%, first grade ≤0.80%, second grade ≤0.80%. Low sulfur prevents hot brittleness of castings and ensures mechanical properties
5. Volatile Matter: ≤1.5%. Low volatile matter ensures stable combustion and reduces smoke and furnace fluctuation
6. Crushing Strength (M40): Superior grade ≥87.0%, first grade ≥83.0%, second grade ≥80.0%, ensuring the stability of material column in the furnace and not easy to break
7. Drop Strength: Superior grade ≥93.0%, first grade ≥89.0%, second grade ≥85.0%
8. Moisture: ≤5.0%, controllable moisture avoids sudden drop of furnace temperature and ensures melting efficiency
9. Coke Fines
