Means for injecting gas into a molten metal

摘要

A gas delivery tube including tubular body portion of refractory material having a recess adjacent one end in which recess is housed a porous element for emitting small bubbles containing the gas. The body portion is provided with an internal gas inlet pipe, one end of which opens into an internal chamber in communication with said recess while at its other end the pipe terminates in means enabling it to be connected to a supply of gas. The delivery tube is especially useful for degasifying aluminium, copper, and their alloys.