Sub-Product

Coke is solid carbonaceous material obtained from the destructive distillation of low ash, low sulphur bituminous coal (coking coal, metallurgical coke). Coke is formed when the coal is heated in the absence of air. The residue obtained from the carbonization of a non-coking coal such as sub-bituminous coal, lignite (brown coal) or anthracite is normally called char.

Coke contains carbon as its principal constituent, together with mineral matter and residual volatile matter. Coke is used as a fuel and reducing agent in smelting Iron ore in a blast furnace. Since it is one of the basic raw materials used to produce pig iron, which in turn is used to manufacture steel. This is the prime reason behind the integral steel plants having their own Low Ash Metallurgical (LAM) coke manufacturing plant on premises.

The different varieties of metallurgical coke include:

• Blast Furnace Grade
• Foundry Grade
• Ferro Alloy Coke
• Other Chemical Industries Grade

Source: 2.imimg.com, Low ash metallurgical coke