The coking process takes place in a coke oven that consists of heating coal to around 1000-1100 °C in the absence of oxygen to remove the volatile compounds. Once pushed out of the vessel the hot coke is then quenched with either water or air to cool it before storage or is transferred directly to the blast furnace for use in iron making. The volatile matter and moisture that are driven off during the coking process are collected, dried and cleaned. The resulting coke oven gas is recovered or transported for downstream use.