Method and Device for Continuous Casting of Metals
The invention relates to a method for close-to-final-dimension casting of billets made of metal, particularly rectangular billets, wherein molten metal ( 2 ) is cast onto a circulating transport belt ( 3 ), followed by in-line rolling and cooling of said transport belt ( 3 ). The invention also relates to a device for carrying out the inventive method.
1 . A method for the near-net-shape casting of metal strands, especially rectangular strands, where liquid metal ( 2 ) is cast on a revolving conveyor belt ( 3 ) with subsequent in-line rolling, wherein the conveyor belt ( 3 ) is cooled, the cooling is effected by spraying coolant or cooling water by nozzles ( 11 ) onto the underside ( 10 ) of the carrying run ( 8 ) of the conveyor belt ( 3 ), the nozzles ( 11 ) are combined to form nozzle segments ( 12 - 20 ), and a separate, pressure-controlled water supply is assigned to each nozzle segment ( 12 - 20 ).
2 . A method in accordance with claim 1 , wherein the coolant pressure of the nozzles ( 11 ) is different in each nozzle segment ( 12 - 15 ).
3 . A method in accordance with claim 1 , wherein the coolant pressure of the nozzles ( 11 ) is the same in each nozzle segment ( 16 - 20 ).
4 . A method in accordance with claim 1 , wherein the volume flow rate of the coolant or cooling water in the individual nozzle segments ( 12 - 20 ) is varied.
5 . A method in accordance with claim 1 , wherein the volume flow rate of the coolant or cooling water in the individual nozzle segments ( 12 - 20 ) is set at a constant level.
6 . A method in accordance with claim 1 , wherein the mass flow rate m of the liquid metal is held constant.
7 . A method in accordance with claim 1 , wherein the conveyance speed v Tr is held constant.
8 . A method in accordance with claim 1 , wherein the metal feed is increased or decreased.
9 . A method in accordance with claim 1 , wherein the conveyance speed v Tr is increased or decreased.
10 . A device for the near-net-shape casting of metal strands, especially rectangular strands, where liquid metal ( 2 ) is cast on a revolving conveyor belt ( 3 ), which runs around two rollers ( 4 , 5 ), has a carrying run ( 8 ) with an upper side ( 7 ) and an underside ( 10 ), and is followed by a rolling installation, wherein nozzles ( 11 ) are arranged in nozzle segments ( 12 - 20 ) below the underside ( 10 ), and each nozzle segment ( 12 - 20 ) has a separate, pressure-controlled coolant or cooling water supply.
11 . A device in accordance with claim 10 , wherein the nozzles ( 11 ) in the individual nozzle segments ( 12 - 20 ) have different volume flow rates.
12 . A device in accordance with claim 10 , wherein the nozzles ( 11 ) in the individual nozzle segments ( 12 - 20 ) have identical volume flow rates.
13 . A device in accordance with claim 10 , wherein the nozzle segments ( 16 - 20 ) are interchangeably arranged.