Continuous casting and rolling apparatus and continuous casting and rolling method

Abstract

A continuous casting and rolling apparatus includes: a continuous casting device; a cutting device that is disposed at the output side of the continuous casting device and cuts an inner slab produced from the continuous casting device; a rolling device pressing down on the slab and disposed downstream of the continuous casting device in the moving direction of the inner slab; a tunnel furnace which is disposed between the cutting device and the rolling device and heats the slab disposed on the main path of the inner slab that is transferred from the continuous casting device to the rolling device; and a loading adjustment unit which is disposed adjacent to the tunnel furnace and unloads the slab from the main path from the outlet side of the tunnel furnace and loads the slab onto the main path from the inlet side of the tunnel furnace.

1 . A continuous casting and rolling apparatus, comprising:
 a continuous casting device;   a cutting device disposed on an outlet side of the continuous casting device and cutting an inner slab produced in the continuous casting device;   a rolling device pressing a slab down and disposed downstream of the continuous casting device in a moving direction of the inner slab;   a tunnel furnace provided between the cutting device and the rolling device and heating a slab located on a main path of the inner slab transferred from the continuous casting device to the rolling device; and   a loading adjustment unit provided adjacent to the tunnel furnace, separating the slab on the main path from the tunnel furnace and introducing the slab onto the main path from an inlet side of the tunnel furnace.   
     
     
         2 . The continuous casting and rolling apparatus of  claim 1 , wherein the loading adjustment unit comprises:
 a drawing device provided adjacent to an outlet side of the tunnel furnace and separating the slab from the main path to be introduced onto a supplementary path; and   an introducing device provided adjacent to the inlet side of the tunnel furnace and receiving the slab through the supplementary path to be introduced onto the main path.   
     
     
         3 . The continuous casting and rolling apparatus of  claim 2 , wherein the loading adjustment unit is configured to introduce the inner slab, separated from the main path of the outlet side of the tunnel furnace by the drawing device, onto a main path of the inlet side of the tunnel furnace by the introducing device. 
     
     
         4 . The continuous casting and rolling apparatus of  claim 2 , wherein the apparatus comprises a reheating device on the supplementary path between the introducing device and the drawing device and heating the slab on the supplementary path. 
     
     
         5 . The continuous casting and rolling apparatus of  claim 2 , wherein the apparatus comprises a scarfing device provided on the supplementary path between the introducing device and the drawing device and heating the slab on the supplementary path. 
     
     
         6 . The continuous casting and rolling apparatus of  claim 2 , wherein the introducing device is configured to receive at least one of an inner slab produced in the continuous casting device and an outer slab transferred from the outside and introduce the same onto the main path. 
     
     
         7 . A continuous casting and rolling method, comprising:
 a process of supplying an inner slab, involving cutting an inner slab produced in a continuous casting device and supplying the same to a tunnel furnace;   a rolling process involving pressing down the slab received from a main path of the slab moving through the tunnel furnace; and   a subworking process performed between the inner slab supply process and the rolling process and involving separating the slab on the main path from an outlet side of the tunnel furnace when the rolling process stops and introducing the slab onto the main path from an inlet side of the tunnel furnace when the rolling process resumes.   
     
     
         8 . The continuous casting and rolling method of  claim 7 , wherein the subworking comprises:
 a drawing process involving separating the slab on the main path from the outlet side of the tunnel furnace when the rolling process stops; and   an introducing process involving receiving the slab separated from the main path of the outlet side of the tunnel furnace and introducing the same onto the main path of the inlet side of the tunnel furnace when the rolling process resumes.   
     
     
         9 . The continuous casting and rolling method of  claim 8 , wherein the subworking process involves the introducing process subsequent to the drawing process so as to exclude intervention of another step therebetween, when the slab introduced onto the main path maintains a temperature for rolling. 
     
     
         10 . The continuous casting and rolling method of  claim 8 , wherein the subworking process further comprises reheating performed before the introducing process and involving heating the slab introduced onto the main path during the subworking on the supplementary path when the slab has a temperature below the temperature for rolling. 
     
     
         11 . The continuous casting and rolling method of  claim 8 , wherein the subworking process further comprises a scarfing process performed before the introducing process and involving scarfing the slab separated from the main path of the outlet side of the tunnel furnace on the supplementary path through which the slab is delivered to be introduced onto the main path of the inlet side of the tunnel furnace. 
     
     
         12 . The continuous casting and rolling method of  claim 8 , wherein the subworking process further comprises a process of supplying an outer slab, performed before the introducing process and involving introducing the outer slab produced outside onto the supplementary path through which the slab separated from the main path of the outlet side of the tunnel furnace is delivered to be introduced onto the main path of the inlet side of the tunnel furnace. 
     
     
         13 . The continuous casting and rolling method of  claim 12 , wherein the process of supplying an outer slab is performed when capacity of the slab performing pressing down during the rolling process is larger than a supply amount of the inner slab.