Blast Furnace Met Coke

Property

Typical Range/Requirement

Significance

Fixed Carbon Content

≥85%

Directly impacts heating value and reduction efficiency; higher is better.

Ash Content

≤12.5%

Excessive ash increases slag formation and reduces furnace productivity.

Sulfur Content

≤0.7%

Sulfur is a harmful impurity; low levels prevent sulfur contamination in iron.

Volatile Matter

≤1.5%

High volatile matter indicates incomplete carbonization, risking poor coke quality.

Granularity

25–100 mm (sized by furnace scale)

Larger furnaces require larger, uniform pieces to maintain gas permeability.

Mechanical Strength

- M40 (crushing strength): ≥85% (large furnaces)
- M10 (abrasion resistance): ≤7%

M40 measures resistance to impact; M10 measures wear resistance (lower M10 is better).

Reactivity (CRI)

≤30%

Resistance to reaction with CO₂; lower values mean better durability in the furnace.

Post-Reaction Strength (CSR)

≥55%

Maintains structural integrity after chemical reactions; higher is preferred.