Title:
CONTINUOUS CASTING METHOD FOR SQUARE CAST BILLET OF STEEL AND CONTINUOUS CASTING EQUIPMENT
Document Type and Number:
Japanese Patent JP3038308
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a continuous casting method for a square cast billet of steel free from deformation and destruction even if high-speed casting of small- sized blooms and billets is executed and continuous casting equipment.
SOLUTION: The square cast billet formed in a casting mold 1 is forcibly cooled by injecting high-pressure water at ≥10kg/cm2 in a region 3A from the outlet of the casting mold 1 to a distance of 1/2 the cast billet drawing out distance in one minute at the max. casting speed. To this purpose, a high- pressure spraying device 5 for spraying the high-pressure water of ≥10kg/cm2 to the outer peripheral surface of the cast billet is disposed right under the outlet of the casting mold 1. The nozzle back pressure of this device is set higher than that of atm. pressure spraying devices 6, 7, by which the collision pressure of the spraying liquid drops is increased to make vapor films thinner and to destroy the films. The cast bloom surfaces are thereby directly cooled with the water and the formation of a solidified shell is accelerated. The permissible stress of the solidified shell is increased by self-supporting, by which the high-speed casting is made possible.
Inventors:
Toru Shima
Application Number:
JP28780995A
Publication Date:
May 08, 2000
Filing Date:
October 09, 1995
Export Citation:
Assignee:
Sumitomo Heavy Industries Ltd.
International Classes:
B22D11/00; B22D11/124; B22D11/16; B22D11/22; (IPC1-7): B22D11/124; B22D11/16; B22D11/22
Attorney, Agent or Firm:
Yasunobu Yamauchi