Process and apparatus for controlling a continuous casting plant
AssigneeMetacon AG
InventorsBernhard Tinnes, Heinz Kreuzberg
Life of this patent
Estimating the term…
Abstract
For preventing break-out in a continuous casting plant in which the quantity of molten material being supplied to a mold is controlled to a predetermined level, changes in the quantity of molten material being supplied to the mold is constantly monitored. The time behavior of quantity increases of molten material being supplied to the mold is determined and a break-out signal is produced when the quantity of molten material increases at more than a predetermined rate. The break-out signal may be produced only when the rate of change of molten material in the mold and the rate of change of the speed of a casting leaving the mold are less than predetermined values.
Claims22
A process for detecting break-out in a continuous casting plant having a mold wherein the quantity of molten material being supplied to said mold is controlled to a predetermined level, comprising the steps of:
- monitoring the change in the flow rate of molten material being supplied, said monitoring being carried out prior to the molten metal reaching the mold;
- determining the time behavior of flow rate increases detected in said monitoring step;
- and
- producing a break-out signal when the flow rate of said molten material increases at more than a predetermined rate.
Apparatus for detecting break-out in a continuous casting plant including a source of molten material, a governor slide valve for controlling the flow of molten material from said source, a mold for receiving molten material from said valve and control means for controlling said valve to maintain the level of molten material in said mold constant, said apparatus comprising:
- means for producing a position signal related to the position of said valve;
- means for time-based differentiating said position signal;
- and
- evaluation means for producing a break-out signal when said differentiated position signal exceeds a predetermined value.
Apparatus for continuously molding molten material comprising:
- a source of molten material;
- a governor slide valve for controlling the flow of molten material from said source;
- a mold for receiving said molten material from said valve;
- means for producing a position signal related to the position of said valve;
- means for producing a level signal related to the level of molten material in said mold;
- means for producing a speed signal related to the speed a casting leaves said mold;
- means, responsive to said level signal and said speed signal, for controlling said valve to maintain the level of molten material in said mold constant;
- means for time-based differentiating said position signal to produce a differentiated position signal;
- means for time-based differentiating said level signal to produce a differentiated level signal;
- means for time-based differentiating said speed signal to produce a differentiated speed signal;
- and
- evaluation means, responsive to said differentiated position signal, said differentiated level signal and said differentiated speed signal, for producing a break-out signal when said differentiated position signal, said differentiated level signal and said differentiated speed signal have a predetermined relationship.
A process for detecting break-out in a continuous casting plant wherein the quantity of molten material being supplied is controlled to a predetermined level, comprising the steps of:
- monitoring for changes in the position of a governor slide through which said molten material passes to an ingot mold;
- determining the time behavior of changes in the opening past said governor slide detected in said monitoring step;
- and
- producing a break-out signal when the opening through said governor slide increases at more than a predetermined rate.
A process for detecting break-out in a continuous casting plant wherein the quantity of molten material being supplied is controlled to a predetermined level, comprising the steps of:
- monitoring for changes in the position of a governor slide through which said molten material passes to an ingot mold;
- determining the time behavior of changes in the opening past said governor slide detected in said monitoring step;
- monitoring the removal speed of a casting;
- monitoring the level of molten material in an ingot mold;
- and
- producing a break-out signal when the removal speed and ingot mold level have a predetermined relationship with a rate at which the opening through said governor slide increases.
A process for detecting break-out in a continuous casting plant wherein the quantity of molten metal being supplied is controlled to a predetermined level, comprising the steps of:
- monitoring the level of molten metal in an ingot mold;
- monitoring the removal speed of a casting from said ingot mold;
- monitoring the changes in the flow rate of molten material being supplied to said mold;
- determining the time behavior of flow rate increases detected in said flow rate monitoring step;
- and
- producing a break-out signal when the removal speed and ingot mold level have a predetermined relationship with the rate of increase of said molten metal flow rate.
A process for detecting break-out in a continuous casting plant wherein the quantity of molten material being supplied is controlled to a predetermined level, comprising the steps of:
- monitoring the level of molten material in an ingot mold;
- monitoring the changes in the flow rate of molten metal being supplied to said mold;
- determining the time behavior of flow rate increases detected in said flow rate monitoring step;
- and
- producing a break-out signal only when the ingot mold level has a predetermined relationship with the rate of increase of said molten metal flow rate.
Dependencies are inferred from the claim text.