Coking coal, also known as metallurgical coal, is used to create coke, one of the key inputs for the production of steel.
There are many varieties of coal in the world, ranging from brown coal or lignite to anthracite. The property that really sets coking coals apart from other coals is caking ability, which is the specific property required in order to make coke suitable for making steel.
Coke is produced by heating coking coals in a coke oven in a reducing atmosphere. As the temperature of the coal increases, it becomes plastic, fusing together before resolidifying into coke particles. This is known as the caking process. The quality of the resultant coke is determined by the qualities of the coking coals used, as well as the coke plant operating conditions.
Coke quality is largely influenced by coal rank, composition, mineral content and the ability to soften when heated, become plastic, and resolidify into a coherent mass. Bituminous class coals of high, medium, and low volatile rank that possess these properties are called “coking” coals.
High quality coking coals are in great demand by steel producers, who need these coals to make high quality coke to maximise the productivity of their blast furnace operations.
Aspire’s Ovoot coking coal is a mid-volatile bituminous B with superior fluidity, plastic and caking properties.