JPH06344078A - Production of steel ingot with hanger - Google Patents

Abstract

PURPOSE:To enable the fitting of a hanger to a steel ingot, to prevent the surface oxidation and to produce the steel ingot having high quality by floating up a fire-resistant board arranging the metallic hanger on the molten steel surface in a mold. CONSTITUTION:Casting is executed while floating up the board 1 arranging the hanger 2 on the molten steel surface. At the time of solidifying the molten steel, as the hanger 2 at the lower part of the board 1 is inserted into the steel ingot, the steel ingot with hanger is produced. As the fire-resistant board 1 is smaller in specific gravity than the molten steel 5, this board is floated up on the molten steel surface during casting and risen up. After casting the necessary wt., the molten steel 5 is solidified and at this time, as a part of the hanger 2 at the lower part of the board is inserted as cast is, the hanger is integrated with the steel ingot after solidifying. By this method, the hanger 2 can easily be fitted to the steel ingot and as the board 1 is floated up, the preventing effect of the surface oxidation during casting is enhanced and the steel ingot having high quality can be produced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a steel ingot, and more particularly to a method for casting a steel ingot with a hanging handle, which has excellent workability such as transportation of the solidified steel ingot.

[0002]

2. Description of the Related Art It is useful to attach a handle to a steel ingot in a sub-casting ingot method in view of the convenience of handling the solidified steel ingot. As a means for attaching the hanging hand, a means for inserting the hanging hand into the molten metal surface before the molten steel solidifies has been used.

[0003]

In the above prior art, for example, when the distance between the upper end of the mold and the molten metal surface is large, it is difficult to insert the hanging hand. In particular, when casting a long cylindrical steel ingot, it was often impossible to attach a hanging hand depending on the size of the steel ingot.

An object of the present invention is to make it possible to cast a steel ingot with a handle by a simpler method.

[0005]

The above-mentioned object can be achieved by carrying out submersion casting while floating a refractory board provided with a hanging hand on the surface of the molten metal. In FIG. 1, 1 is a refractory board, and 2 is a hanging hand.

[0006]

[Function] Since the refractory board has a lower specific gravity than molten steel,
During casting, it floats on the surface of the molten metal and rises. After the required weight is cast, the molten steel solidifies, but at this time, a part of the handle of the lower part of the board is cast around, so that it becomes integral with the steel ingot after solidification.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory view of a bottom pouring ingot method for carrying out the method of the present invention. It is characterized in that casting is performed while floating the board 1 provided with the hanging hand 2 on the surface of the molten metal, and the hanging hand at the bottom of the board 1 is hung because it is surrounded by a steel ingot during solidification. A hand ingot is produced.

[0009]

EFFECTS OF THE INVENTION According to the present invention, (1) it is possible to manufacture a steel ingot with a hanging handle, which is highly workable for transportation and the like, by a simple method. In particular, in the prior art, even when it is difficult to attach a sling, it is possible to easily attach the sling.

(2) By floating the board, the effect of preventing surface oxidation during casting is improved, and a high quality steel ingot can be manufactured.

[Brief description of drawings]

FIG. 1 is an explanatory view of a bottom casting method according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Refractory material board, 2 ... Hanger, 3 ... Mold, 4 ... Injection pipe, 5 ... Molten steel, 6 ... Runner, 7 ... Surface plate.

Front page continuation (72) Inventor Takashi Kimura 2 832 Horiguchi, Katsuta City, Ibaraki Prefecture Hitachi Ltd.

Claims (1)

[Claims] 1. A method for producing a steel ingot with a hanging handle, comprising: a refractory board provided with a metal hanging handle is floated on a molten steel surface in a mold in the sub-casting ingot method.