Abstract: The device and method of the present invention employs a column having a gas inlet in its lower part and a gas outlet in its upper part. Carbon particles are introduced into the column through a supply pipe. The supply pipe is movable so that by manipulating the height of the supply pipe in conjunction with discharging particulate matter through the column, the height of the bed of particulate matter in the column can be adjusted so that the retention time of the off gas in the particulate bed is constant. By maintaining a constant retention time of the off gas in the bed, complete conversion of the off gas is achieved.

Abstract: The invention relates to a method and a device for the continuous degassing of molten metals and subsequent casting of the degassed metal, according to which the molten metal is guided into a vacuum for the purpose of degasification and after degasification is transferred into a casting chamber. To make it possible to carry out these operations continuously and to prevent the degassed metal from coming into contact with untreated metal, the invention provides for the molten metal to be transferred from a first chamber via an ascension pipe having an inlet opening located below the level of the metal bath into a vacuum chamber serving as degasification chamber by utilizing only the lift force resulting from the pressure differential between the vacuum chamber and the first chamber and no other means of transport. From the vacuum chamber the molten meal by gravity flows into the downpipe whose outlet opening is below the level of the molten metal bath in the casting chamber and enters the casting chamber.

Abstract: Disclosed is a method and apparatus of treating molten metal for reducing the amount of gaseous or volatile material contained therein. The method comprises providing a body of molten metal and contacting the molten metal with a porous member having a porous surface resistant to penetration with the molten metal. The porous member is subjected to reduced pressure to impose a reduced pressure zone on the molten metal contacting the porous surface thereby removing the gaseous material from the molten metal through the porous member.