Molten metal conveying means and method of conveying molten metal from one place to another in a metal-melting furnace using intermittent or pulsating insert gas feed

An improved method for the conveyance of molten metal from one place to another in a molten metal pool or mass in a metal-melting furnace or out of said molten metal pool, comprising the steps of:

• providing an elongated conveying conduit having a lower end and an upper end, at least a portion of said conduit being inclined upwardly from the horizontal,
• providing a gas feed means having a gas inlet port and a gas exit port,
• positioning the exit port of said gas feed means with respect to the lower end of said conveying conduit so as to enable release of gas from said exit port into said conveying conduit at or adjacent its lower end,
• submerging the exit port of said gas feed means and the lower end of said conveying conduit in a molten metal mass or pool,
• intermittently introducing inert gas into said gas feed means through the gas inlet port thereof and causing said gas to emerge from the exit port thereof into said conveying conduit at or adjacent its lower end and to rise up the incline therein, and
• inducing concomitant flow of molten metal in said conveying conduit by means of said gas exiting from the exit port of said gas feed means and into said conveying conduit at or adjacent its lower end and rising up the incline therein.