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Metallurgical coal

Metallurgical coal is used in steel production is the focus of our coal trading operations.

It is used to make metallurgical coke which is used as a reducing agent in a blast furnace to temper iron ore into steel products.



Technical Specification for Hard Coking Coal

 

 

Technical Parameters

Desired Specification

Tolerance Limits

1.

Total Moisture

(on ‘As received’ basis)

8.0% Max

12.0% Max

2.

Sulphur

(BS 1016-1973)

0.6% Max

1.0% Max

3.

Crucible Swelling Number

(CSN) (ISO/501-1974)

5 Minimum

5 Minimum

4.

Proximate Analysis

(On “Air dried basis”)

(BS 1016-1973 Part-3)

 

 

Volatile Matter

btw 20% – 32%

btw 20% – 32%

Ash

8.0% Max

10.0% Min

5.

i. Mean Max Reflectance of Vitrinite

(ISO/7404)

1.15 – 1.35

1.15 – 1.40

ii. Vitrinite Percentafge

(ISO/7404)

55% Min.

50% Min.

iii. Vitrinite Distribution

(ISO/7404)

80% Min.

75% Min.

6.

Gieseler Plastometer Test

(ASTM-D2639)

Maximum Fluidity (ddpm)

300 Min.

300 Min.

 

 

 

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