Coke is made of bituminous coal by high-temperature coking process, which is mainly used for blast furnace ironmaking and smelting of non-ferrous metals such as copper, lead and zinc, and plays the role of reducing agent, heating agent and material column skeleton.
Charcoal is a dark brown or black porous solid fuel left by incomplete combustion of wood or wood raw materials or pyrolysis under the condition of air isolation. Its hygroscopicity is used to observe climate change. Fuel is a reducing agent for electric furnace smelting, and it is used as a covering agent to prevent metal oxidation when refining metal. It is often used as raw material of carbon disulfide and activated carbon in chemical industry. It is also used as fuel for biscuit factories and smelters, as well as for water filtration, liquid decoloration and preparation of black powder. It's still grinding.