发明名称 |
PRODUCTION OF STEEL INGOT |
摘要 |
PURPOSE:To improve the quality of a steel ingot by moving horizontally a casting mold with respect to a gas nozzle for spraying a molten steel and blowing a prescribed flow rate of an inert gas to the molten metal surface of the casting mold disposed at a specific distance or below. CONSTITUTION:Mold side walls 1 each consisting of a heat insulating material and having a flat rectangular shape are fixed on a flat ingot mold stool 2 to form the casting mold 3. A molten steel discharging pipe 4 is provided above the mold 3 and the gas nozzle 6 for spraying is disposed near the aperture end thereof. The moten steel flow 5 flowing downward from a discharge pipe is atomized by an inert gas such as Ar gas ejecting from a nozzle 6. The mold 3 is moved at >=2mm/sec relative horizontal speed with respect to the nozzle 6 and the inert gas is ejected at 20-700Nm<3> for each one ton of the steel plate from the nozzle 6. The distance between the molten metal surface 8 and the nozzle 6 is maintained at <=3m. Blowholes and the segregation in the head part of the ingot are prevented and the quality of the ingot is improved by the above-mentioned method. |
申请公布号 |
JPS61123446(A) |
申请公布日期 |
1986.06.11 |
申请号 |
JP19840244837 |
申请日期 |
1984.11.20 |
申请人 |
KAWASAKI STEEL CORP |
发明人 |
HAIDA OSAMU;KAKIO YASUHIRO |
分类号 |
B22D7/00;B22D23/00;B22F3/115 |
主分类号 |
B22D7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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