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What is Metcoke?

Coke is made by destructive distillation of a blend of selected Bituminous coals (called Coking coal or Metallurgical coal) in special high temperature ovens in the absence of oxygen until a greater part of the volatile matter is driven off. The resulting product, COKE, consists principally of Carbon.

Traditionally, chemistry, size & strength (both cold as well as hot) have been considered the most important properties for use in the blast furnace. The quality of the constituent coals determines the characteristics of the resultant coke.

Coke is primarily used to smelt iron ore and other bearing materials in blast furnaces, acting both as a source of heat and as a chemical reducing agent to produce pig iron or hot metal. Coke, iron-ore and limestone are fed into blast furnace, which runs continuously. Hot air blown into the furnace burns the coke, which serves as source of heat and as an oxygen reducing agent to produce metallic iron. Limestone acts as a flux and also combines with impurities to form slag. Coke also serves as a structural material to support the deep bed of coke/iron oxide/limestone that makes up much of the furnace volume. It is in this last role that its properties are crucial. It is important that it does not degrade (e.g. break up into small particles) during its descent through the oxidizing hot gases passing through the stock region of the furnace.

To produce high quality blast furnace coke, high quality coal must be used. High quality coals are those coals that when coked together produce the highest stability and CSR (Coke Strength after Reactivity) to support the blast furnace burden and allow maximum production.

Low Ash Metallurgical Coke is required for metallurgical and chemical industries and is used as the primary fuel where high temperature and uniform heating is required. The industrial consumers of LAMC include integrated steel plants, industry/foundries producing Ferro Alloys, Pig Iron, Engineering Goods, Chemicals, Soda Ash and Zinc units etc.

At GNCL, we manufacture LAMC of various specifications and sizes, customized to meet the requirements of the clients with whom we maintain long term relationships. With the economy looking very buoyant the demand outlook for superior quality (low ash content) coke is positive and the company strives to bridge the demand supply gap by adding fresh capacity and manufacture high quality coke.

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