JPS633738Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a drying device for ladles lined with refractory material.

[Conventional technology]

Ladles and the like used for transporting molten steel have refractories attached to their insides. Newly manufactured ladles and ladles with refractories repaired must be dried before filling with molten steel to remove moisture from the refractories. This is done to prevent residual moisture from causing a steam explosion when it comes into contact with molten steel, causing serious accidents to personnel and equipment. The conventional refractories used were bricks with low moisture content.
Monolithic refractories such as mortar were used to bond the bricks together, and moisture was mainly absorbed from the mortar.

However, in recent years, bricks have not been used and the entire ladle has been lined with monolithic refractories, which has brought in a lot of moisture and requires a long time to dry. In addition, some ladles have steam vent holes in the steel shell to facilitate the removal of moisture during drying, but ladles are not equipped with steam vent holes when performing vacuum treatment of molten steel. These ladles require a long time to dry.

The conventional ladle drying method will be explained with reference to FIG. Although the inside of the ladle 1 is heated with flame from a burner 2 to evaporate the water in the refractory 3, the heat is radiated from the iron skin 4, and the heat of the flame does not sufficiently contribute to the evaporation of the water. In order to solve such problems,
A drying device shown in No. 98472 has been proposed.
In this device, a wall material lined with a heat insulating material is installed with a gap outside a ladle, and hot air inside the ladle is passed through a conduit into the gap between the ladle and the wall material.

[Problem that the invention seeks to solve]

However, this device has the disadvantage that the entire device is large-scale and that the area around the ladle can only be dried under the same conditions. That is, some ladles may be constructed by artificially changing the thickness of the refractory material in the circumferential direction. When drying such a ladle, if the area around the ladle is dried under the same conditions, the time required to complete drying differs between thick and thin refractory areas, making it impossible to dry the entire ladle uniformly.

[Means for solving problems]

The present invention was designed to solve the above-mentioned problems, and consists of a plurality of pieces of insulation material divided in the circumferential direction of the ladle, and the upper part of the insulation material can be opened and closed using the lower end of each insulation material as a fulcrum. This drying device is characterized by: The present invention will be explained below using figures.

1 and 2 are explanatory diagrams of the configuration of the present invention, where FIG. 1 is a sectional view taken along the line AA in FIG. 2, and FIG. 2 is a front view. In FIGS. 1 and 2, a heat insulating material 5 is provided around the ladle 1. At this time, the heat insulating material 5 is divided in the circumferential direction of the ladle into divided heat insulating materials 5-1 to 5-4. The lower ends of the divided heat insulating materials 5-1 to 5-4 are respectively rotatable about the fulcrum 6. The cylinders 7, 7 are used as the driving source for rotation. One ends of the cylinders 7, 7 are rotatably attached to brackets 8, 8 provided near the upper portions of the divided heat insulators 5-1 to 5-4, and the other ends are rotatably provided on the ground. Although the heat insulating materials 5-1 to 5-4 are divided into four parts in the figure, the present invention is not limited to this, and the more divided into two or more, the easier it is to achieve the purpose of the present invention. The reason why the upper part of the heat insulating material 5 can be opened and closed is to facilitate storage and removal of the ladle.

[Effect]

Since the present invention is constructed in this way, when the inside of the ladle 1 is heated by the flame of the burner 2 to evaporate the moisture in the refractory 3, as shown in the cross section in FIG. Heat dissipation can be prevented by the heat insulating material 5 and flame heat can be used effectively.

In addition, if the thickness of the refractory material 3 differs in the circumferential direction of the ladle as shown in Fig. 5, only the upper and lower parts in Fig. ) allows the ladle to be dried uniformly in approximately the same amount of time in the circumferential direction by performing the drying operation with the divided insulation material open.

That is, as shown in FIG. 6, which shows the relationship between the thickness of the refractory and the time required for drying, the drying time differs depending on the presence or absence of a heat insulating material. For example, when drying a 700mm refractory without insulation and when drying a 950mm refractory with insulation, the drying time is the same for both, about 80 hours.
In addition, FIG. 5b is a BB cross section of FIG. 5a, and FIG. 5c is a CC cross section of FIG. 5a.

[Effect of idea]

As described above, according to the present invention, it is possible to shorten the drying time with a simple structure of the insulating material, and when drying a ladle with different refractory thicknesses in the circumferential direction, it is possible to dry the ladle uniformly around the entire circumference and in the same amount of time. Can be dried.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the device of the present invention, Fig. 2 is an overall front view, Fig. 3 is an explanatory diagram of drying work using the inventive device, Fig. 4 is an explanatory diagram of the conventional drying method, and Fig. 5 is an explanatory diagram of the conventional drying method. Figure a is an explanatory diagram of a ladle with different thicknesses in the circumferential direction, Figure 5 b is a sectional view taken along line B-B in Figure 5 a, Figure 5 c is a sectional view taken along line C-C in Figure 5 a, and Figure 6 is a graph showing the difference in drying time depending on the presence or absence of insulation material. 1: ladle, 2: burner, 3: refractory, 4: iron skin, 5: insulation material, 5-1 to 5-4: split insulation material,
6: fulcrum, 7: cylinder, 8: bracket.

Claims (1)

[Scope of utility model registration request] A drying device for ladles, characterized in that a plurality of insulating materials are divided in the circumferential direction of the ladle, and the upper part of the insulating material can be opened and closed using the lower end of each insulating material as a fulcrum.