Mold for continuous casting

Abstract

A mold is provided for the continuous casting of a liquid metal. The mold includes at least one wall ( 21 ) that defines at least part of a casting cavity ( 22 ) in which to cast the liquid metal. Cooling devices ( 23 ) are configured to cool the wall ( 21 ) with a cooling liquid by delivering at least a jet (G) of the cooling liquid in a delivery direction incident against at least one portions of an interface surface of the wall ( 21 ).

1 - 16 . (canceled) 
     
     
         17 . A mold for continuous casting of a liquid metal, the mold comprising at least one wall ( 21 ) defining at least part of a casting cavity ( 22 ) in which to cast the liquid metal, and cooling devices ( 23 ) configured to cool the wall ( 21 ) by a flow of cooling liquid on at least one interface surface of the wall ( 21 ), the at least one interface surface being associated at least in part with an interspace ( 26 ), comprised between the wall ( 21 ) and a containing body ( 25 ) outside the wall ( 21 ), or with at least one cooling channel ( 50 ) made in the wall ( 21 ), the cooling devices ( 23 ) comprising introduction members ( 27 ) and discharge members ( 28 ) configured to generate a controlled flow of the cooling liquid between an entrance end and an exit end of the interspace ( 26 ) or-the at least one cooling channel ( 50 ), wherein the controlled flow has a pressure higher than ambient pressure and the cooling devices ( 23 ) comprise a feed chamber ( 38 ) associated with at least one delivery member ( 31 ) configured to deliver, in the interspace ( 26 ) or in the at least one cooling channel ( 50 ), at least one jet (G) of cooling liquid in a delivery direction incident with respect to the controlled flow and against at least one portion of the interface surface of the wall ( 21 ), the jet (G) interacting with the controlled flow of cooling liquid in order to generate therein a perturbation inside the interspace ( 26 ) or the at least one cooling channel ( 50 ), and wherein feed members ( 39 ) are connected to the feed chamber ( 38 ), the feed members ( 39 ) being independent with respect to the introduction members ( 27 ) and configured to introduce the cooling liquid into the feed chamber ( 38 ). 
     
     
         18 . The mold according to  claim 17 , wherein the cooling liquid is located in the feed chamber ( 38 ) at a pressure between 6 bar and 40 bar. 
     
     
         19 . The mold according to  claim 17 , wherein the jet (G) exits from the at least one delivery member ( 31 ) at a speed at least twice as high as a transit speed of the controlled flow of cooling liquid in the interspace ( 26 ) or in the at least one cooling channel ( 50 ). 
     
     
         20 . The mold according to  claim 17 , wherein the pressure of the cooling liquid in flow conditions in the interspace ( 26 ) or in the at least one cooling channel ( 50 ) is at least 1.5 bar. 
     
     
         21 . The mold according to  claim 17 , wherein the at least one delivery member ( 31 ) comprises at least one delivery channel ( 32 ) facing toward the at least one portion of the interface surface of the wall ( 21 ) and with an axis of delivery incident against the at least one portion of the interface surface. 
     
     
         22 . The mold according to  claim 21 , comprising a plurality of the delivery channels ( 32 ) disposed distanced from each other to cover a height (H) of the interface surface between 50 mm and 200 mm. 
     
     
         23 . The mold according to  claim 22 , wherein the plurality of delivery channels ( 32 ) are disposed distanced from each other to cover a height (H) of the interface surface between 80 mm and 150 mm. 
     
     
         24 . The mold according to  claim 21 , wherein the at least one delivery channel ( 32 ) has a discharge portion ( 34 ) of the cooling liquid having a diameter, or equivalent diameter, of the passage section between 1 mm and 8 mm. 
     
     
         25 . The mold according to  claim 24 , wherein the discharge portion ( 34 ) has a diameter, or equivalent diameter, of the passage section between 1.5 mm and 4 mm. 
     
     
         26 . The mold according to  claim 21 , wherein a first one of the delivery channel ( 32 ) is located at a distance (L) from an end edge ( 35 ) of the wall ( 21 ) between 60 mm and 100 mm. 
     
     
         27 . The mold according to  claim 26 , wherein the distance (L) of the first delivery channel from the end edge ( 35 ) of the wall ( 21 ) is between 70 mm and 90 mm. 
     
     
         28 . The mold according to  claim 21 , wherein at least some of the delivery channels ( 32 ) have their delivery axes inclined in a direction of discharge of the cooling liquid. 
     
     
         29 . The mold according to  claim 21 , wherein the at least one delivery channel ( 32 ) has a shape of a cross section configured as a fissure, through which the cooling liquid passes. 
     
     
         30 . The mold according to  claim 21 , wherein the at least one delivery member ( 31 ) is connected to a positioning member ( 40 ) configured to selectively position the at least one delivery channel ( 32 ) at pre-set distance with respect to the interface surface. 
     
     
         31 . The mold according to  claim 17 , further comprising a plate ( 59 ) defining the wall ( 21 ) and a counter-plate ( 60 ) attached to an external surface ( 24 ) of the plate ( 59 ), wherein the plate ( 59 ) is provided with grooves ( 65 ) open toward the external surface ( 24 ) of the plate ( 59 ) and closed by the counter-plate ( 60 ) or by closing elements ( 66 ) to define the at least one cooling channel ( 50 ), the at least one delivery member ( 31 ) being associated with the plate ( 59 ) to deliver the jet (G) into the at least one cooling channel ( 50 ). 
     
     
         32 . A method for continuous casting of a liquid metal in a casting cavity ( 22 ) defined by at least one wall ( 21 ), the method comprising a step of cooling the wall ( 21 ), the cooling step providing respectively introduction and discharge of a cooling liquid in at least one interspace ( 26 ) or in at least one cooling channel ( 50 ) associated with the wall ( 21 ) in order to generate a controlled flow of the cooling liquid between an entrance end and an exit end of the interspace ( 26 ) or the at least one cooling channel ( 50 ), wherein the controlled flow of the cooling liquid has a pressure higher than ambient pressure, wherein the cooling step comprises delivery, with at least one delivery member ( 31 ), of at least one jet (G) of the cooling liquid in the interspace ( 26 ) or in the at least one cooling channel ( 50 ), in a delivery direction incident with respect to the controlled flow and against at least one portion of the interface surface of the wall ( 21 ), the jet (G) interacting with the controlled flow of the cooling liquid in order to generate a perturbation inside the interspace ( 26 ) or in the at least one cooling channel ( 50 ), and wherein the cooling liquid is introduced into a feed chamber ( 38 ) by feed members ( 39 ), the feed members ( 39 ) being independent with respect to introduction members ( 27 ), and the feed chamber ( 38 ) providing the cooling liquid to the at least one delivery member ( 31 ). 
     
     
         33 . The method according to  claim 32 , wherein the cooling liquid is located in the feed chamber ( 38 ) at a pressure between 6 bar and 40 bar for subsequent delivery through the at least one delivery member ( 31 ). 
     
     
         34 . The method according to  claim 32 , wherein the controlled flow in the interspace ( 26 ) or in the at least one cooling channel ( 50 ) is at a pressure of at least 1.5 bar. 
     
     
         35 . The method according to  claim 32 , wherein the jet (G) exits from the at least one delivery member ( 31 ) at a speed at least twice as high as a transit speed of the controlled flow of cooling liquid in the interspace ( 26 ) or in the at least one cooling channel ( 50 ).