Low ash metallurgical coke is largely manufactured from imported low ash coking coal with ash < 9%. Low ash metallurgical coke is used as a fuel in the iron and steel industry. In foundries, coke is used in Cupola and in the iron and steel industry, it is used in blast furnace and ferro alloy plants. Coke breeze (0-6mm) is used in sinter and cement plants.

Low ash metallurgical coke is defined by its sizes as under

+70-100 mm / +100-150 mm - Foundry Coke

+20-60mm / +20-80 mm - Blast Furnace coke

+6-15mm / +10-25 mm - Nut Coke

0-6 mm - Coke breeze

Typical specifications of Foundry coke is as below :

Foundry Coke Specification Properties Size (+70-100 mm / +100mm) Moisture 5% Ash 12% - 13% V.M 2/3% Sulphur 0.60% Phos 0.05% F.C 86/85% Gross Calorific Value 6500

Remarks

+/- 1% in the above specifications permitted. Size –Undersize: 5% max, Oversize: 5% max.