Coke making is done in a coke oven (beehive) battery of ovens sandwiched between heating walls. They are carbonized at a temperature around 1000-1100 deg C up to a certain degree of devolatization to produce metallurgical coke of desired mechanical and thermo-chemical properties.
A beehive oven is a simple firebrick chamber built with an arched roof so that the shape inside is that of an old-fashioned beehive. Beehive ovens were built in a long row, one oven beside another with a retaining wall between. Such a row of ovens is termed a “battery". Railroad tracks for handling the coal to the ovens run along the top; and other tracks for handling the coke cars run beside the ovens.