Coke coal is a type of solid fuel. Obtained by dry distillation of coal at a high temperature of approximately 1000 ℃. The main component is fixed carbon, followed by ash, which contains very little volatile matter and sulfur. Silver gray in color, with a metallic luster. Hard and porous in texture.

Its calorific value is mostly between 26380 and 31400 kJ/kg (6300 and 7500 kcal/kg). According to different purposes, there are three main types of coke: metallurgical coke, casting coke, and chemical coke. According to size, there are different types of coke, such as block coke, crushed coke, and coke chips. Mainly used for smelting steel or other metals, it can also be used as a raw material for manufacturing water, gas, gasification, and chemical industries.

On October 27, 2017, the International Agency for Research on Cancer of the World Health Organization released a list of carcinogens, in which substances produced during Coke coal production were classified as Group 1 carcinogens.