Arrangement for the delivery of measured quantities of the molten contents of a storage vessel

Claim 2

An arrangement for the delivery of predetermined amounts of the molten contents of a sealed and heated storage vessel having an overflow pipe wherein delivery is controlled by pressurized gas, said arrangement comprising: a storage vessel having an overflow pipe and a cleseable opening to insert a molten charge; an intermediate vessel, said vessel being sealed and into which said overflow pipe opens, said intermediate vessel being provided with a rising delivery pipe; means included in said intermediate vessel for measuring the molten charge contained in the intermediate vessel; first gas pressure lines, said lines having pressure release means, for providing pressurized gas to said storage vessel, said first gas pressure line being individually controllable; and second gas pressure lines, said second gas pressure lines having pressure release means, for providing pressurized gas to said intermediate vessel, said second lines being individually controllable, said second gas pressure lines having preset control means for providing a high initial gas pressure followed by a lower gas pressure so that said second lines, when opened, cause a high initial flow of metal from said intermediate vessel followed by a smaller, substantially constant flow thereafter.

Claim 3

The arrangement of claim 1 wherein said preset control means includes a constant-pressure gas source, a closed, pressurized gas storage chamber, a throttle connected between said source and said chamber, the throttle output and output of said storage chamber being combined and coupled by the gas-pressure line and a valve to the intermediate vessel.

Claim 4

An arrangement for the delivery of predetermined amounts of the molten contents of a storage vessel, said arrangement comprising: a storage vessel having an overflow pipe and a closeable opening to insert a molten charge, said vessel being sealed when said opening is closed; an intermediate vessel, said vessel being sealed and into which said overflow pipes opens, the end of said overflow pipe within said intermediate vessel being at a higher level than the end within the storage vessel, said intermediate vessel being provided with a rising delivery pipe; measuring means, provided in said intermediate vessel, for providing an electrical parameter which corresponds to the molten charge within said intermediate vessel; first gas-pressure lines, said lines having pressure release means, for providing pressurized gas to said storage vessel, said pressurized gas for forcing molten metal from said storage vessel through said overflow pipe into said intermediate vessel, said first gas-pressure lines being individually controllable; and second gas-pressure lines, said second lines having pressure release means, said pessurized gas for forcing molten metal from said intermediate vessel through said delivery pipe, said second gas lines being individually controllable, said second gas-pressure lines including means for controlling the slope of the amount of metal delivered by said delivery pipe versus time, said means including a closed, pressurized gas storage chamber and a constant-pressure adjustable gas source, said storage chamber and adjustable gas source being combined in a single gas line to provide a high initial gas pressure followed by a lower gas pressure when said single gas line is opened.

Claim 5

An arrangement for the delivery of predetermined amounts of the molten contents of a storage vessel, said arrangement comprising: a storage vessel having an overflow pipe and a closeable opening to insert a molten charge, said vessel being sealed when said opening is closed; an intermediate vessel, said vessel being sealed and into which said overflow pipes opens, the end of said overflow pipe within said intermediate vessel being at a higher level than the end within the storage vessel, said intermediate vessel being provided with a rising delivery pipe; measuring means, provided in said intermediate vessel, for providing an electrical parameter which corresponds to the molten charge within said intermediate vessel; first gas-pressure lines, said lines having pressure release means, for providing pressurized gas to said storage vessel, said pressurized gas for forcing molten metal from said storage vessel through said overflow pipe into said intermediate vessel, said first gas-pressure lines being individually controllable; and second gas-pressure lines, said second lines having pressure release means, said pessurized gas for forcing molten metal from said intermediate vessel through said delivery pipe, said second gas lines being individually controllable, said second gas-pressure lines including means for controlling the slope of the amount of metal delivered by said delivery pipe versus time, said means including a closed, pressurized gas storage chamber and a constant-pressure adjustable gas source, said storage chamber and adjustable gas source being combined in a single gas line to provide a high initial gas pressure followed by a lower gas pressure when said single gas line is opened.