A gas burner is a device that produces a controlled by mixing a such as , , or with an oxidizer such as the ambient or supplied , and allowing for and .
The flame is generally used for the heat, infrared radiation, or visible light it produces. Some burners, such as , dispose of unwanted or uncontainable flammable gases. Some burners are operated to produce .
The gas burner has many applications such as , , and , the latter using instead of air for producing a hotter flame, which is required for melting . Chemistry laboratories use natural-gas fueled . For melting metals with melting points of up to 1100 °C (such as , , and ), a propane burner with a natural drag of air can be used. For higher temperatures, acetylene is commonly used in combination with oxygen.