Blast furnace gas flame colour

vary depending on the specific conditions of the furnace and the composition of the gas. However, typically, the flame color of blast furnace gas is blue. This is because blast furnace gas is primarily composed of methane, which burns with a blue flame. If there are impurities in the gas, such as sulfur or carbon, the flame color may change to yellow or orange. In some cases, the flame may also appear to have a greenish tint, which can be an indication of the presence of certain metals or metal compounds in the gas