JPH0730666Y2 - Molten metal container furnace structure - Google Patents

Description

TECHNICAL FIELD The present invention relates to a furnace port structure for a molten metal container such as a tow truck.

2. Description of the Related Art A molten metal container is formed so as to withstand a molten metal at a temperature of several thousand and several hundred degrees by lining a steel shell having a required outer shape with a refractory brick or an irregular shaped refractory material.

However, for example, in a mixed pig iron car that receives hot metal from a blast furnace for hot metal processing, conveys it to a converter, and flows out, the furnace mouth where molten metal flows in and out is exposed to a high-temperature atmosphere, causing distortion of the iron shell and anchors. It was generated or burned, the refractory at the furnace mouth was melted by the molten metal, and local peeling was likely to occur, and the life was short.

Therefore, in the past, castable materials and plastic materials were pasted on the refractory bricks at the furnace mouth of a mixed pig car to protect them, but the effect is low, and repairs are made in a short period of time. Had to be repeated.

Means for Solving the Problems The present invention has been made in view of the above points, and in order to solve the above problems, in order to solve the above problems, a molten metal inflow port and an outflow port of a molten metal container such as a hot metal tank A refractory furnace mouth fitting that allows molten metal to flow into and out of the inner circumference of the furnace is replaceably fitted, and an iron plate cooling box is installed on the furnace mouth joint surface side of the furnace mouth fitting. The inner peripheral surface of the furnace mouth portion is formed in a close contact with the inner peripheral surface of the mouth portion by the cooling medium so that the inner peripheral surface of the furnace mouth portion can be cooled and the refractory material is provided on the operating surface side of the furnace mouth fitting body. Another object of the present invention is to provide a furnace opening structure for a molten metal container, characterized in that the molten metal is formed so that the molten metal can flow in and out freely.

According to the present invention, even if the furnace opening of the molten metal container is repeatedly exposed to a high temperature atmosphere or the molten metal flows in and out to locally damage the refractory furnace fitting, By exchanging the body, the durability of the furnace opening can be improved. Also,
Even if the molten metal flows into and out of the furnace mouth fitting through the furnace mouth fitting, and the furnace mouth fitting is heated to a high temperature, the refractory on the side of the operating surface can be cooled by the internal cooling box. As a result, melting loss of this refractory can be reduced.

Embodiment Hereinafter, the present invention will be described based on an embodiment.

FIG. 1 and FIG. 2 show an embodiment of the present invention, which is applied to a molten metal container of a towed piggy car. Molten metal container 1
Is mounted on a vehicle body that is formed into a rugby ball shape and can travel freely. A furnace port 2 is provided in the center of the body to receive hot metal in a blast furnace and discharge hot metal in a converter. .
The molten metal container 1 is formed by coating the outer peripheral surface with a steel shell 3 having a predetermined thickness and lining a refractory brick 4 on the inner surface side. Then, as shown in FIGS. 1 and 2, in the furnace opening portion 2, a hanging metal fitting 5A is attached to a fire resistant furnace opening fitting body 5, and the furnace opening fitting body 5 is attached to the furnace opening portion 2. It is possible to move up and down,
The furnace mouth fitting 5 is formed so that it can be appropriately replaced and can be cooled to a predetermined temperature with a cooling medium.

The furnace mouth fitting 5 has a stepped cylindrical shape and is airtightly joined to the furnace mouth portion 2 as shown in FIG. 1, so that the joint surface side of the furnace mouth can be charged with a cooling medium. A cylindrical cooling box body 6 made of an iron plate is provided, and a fixed-form refractory material 7 is appropriately provided on the operating surface side of the peripheral surface thereof to cover the irregular-shaped refractory material 8. As the material of the refractory material, for example, one or more refractory raw materials such as magnesia, magcro, lime, spinel, alumina, mullite, sillimanite group mineral, silica, zirconia, and zircon can be mixed and used. . The amorphous refractory 8 is shown in FIGS.
As shown in the figure, the cooling medium 6 is covered with an anchor 9 made of a metal material or a refractory material so as to protrude as much as possible so as not to peel off. Further, as shown in FIGS. 1 and 2, the cooling medium inflow pipe 1 for inflowing and outflowing the cooling medium into the cooling medium 6 is shown.
0 and cooling medium outflow pipes 11 are mounted respectively, and these are connected to a cooling device (not shown) so that refractory in the peripheral portion can be cooled. As the cooling medium, water or other high boiling point liquid or air, nitrogen or other gas can be used, and it is preferable to use an inert gas from the viewpoint of safety. The flow rate of the cooling medium can be appropriately determined according to the cooling capacity.

Therefore, if the cooling medium inflow pipe and the cooling medium outflow pipe are connected to a cooling device and cooled, the furnace mouth fitting can be cooled, and the peripheral portion of the furnace mouth fitting exposed to high temperature by the hot metal and the hot metal pretreatment. It is possible to suppress the temperature rise of the refractory and prevent the amount of melting of the refractory, and also to prevent deformation and burning of the anchor for fixing the refractory and the cooling box of the iron plate.

Further, the inner peripheral surface side of the furnace opening portion fitted into the furnace opening fitting body is also cooled by the cooling box body at the same time, so that the durability can be improved.

Also, when the hot metal and the hot metal pretreatment expose the furnace port fitting to high temperature and damage it, the furnace port fitting that can be moved up and down to the furnace port is appropriately moved, or replaced to replace the molten metal container It can be used continuously without stopping its use, and the molten metal container can be made durable.

Other Embodiments FIG. 3 shows another embodiment of the present invention.

In this embodiment, the furnace mouth fitting 5 which is cooled as described above is detachably attached to the furnace mouth 2 without moving up and down.

In this embodiment, the furnace opening fitting mounted on the furnace opening can be removed and replaced according to the degree of damage to the furnace opening, so that the durability of the molten metal container can be improved.

In the above, the mixed piggy car was explained, but it is also applicable to converters, degassing tanks, and other molten metal containers, and is not limited to the furnace inlet of the upper inlet, but to the furnace outlet of the outlet. Is also applicable.

As described above, according to the present invention, the inner peripheral surface of the furnace opening portion of the molten metal container, which is repeatedly exposed to a high temperature atmosphere and is severely damaged by the inflow and outflow of molten metal, is fitted with the furnace mouth fitting body. Can be protected
Even if the furnace mouth fitting is locally damaged due to inflow and outflow of the molten metal, the furnace mouth fitting can be removed from the furnace mouth and replaced, so that the molten metal container can be continuously used.

Then, the inner peripheral surface side of the furnace opening can be cooled by a tightly closed cooling box body, which can prevent melting damage of the refractory on the inner peripheral surface of the furnace opening that is easily damaged, distortion of the iron shell, etc. The durability of the molten metal container can be improved and the life of the molten metal container can be extended. Further, even if the molten metal flows in and out through the furnace mouth fitting body fitted in the furnace mouth portion and the furnace mouth fitting body is heated to a high temperature, the refractory on the side of the operating surface is also cooled by the cooling box body. The refractory can be cooled and the melting loss of the refractory can be reduced, and when the local portion is damaged, the furnace port fitting can be replaced as described above.

[Brief description of drawings]

1 and 2 are a side sectional view and a perspective view of a furnace opening of an embodiment of the present invention, and FIG. 3 is a side sectional view of a furnace opening of another embodiment of the present invention. 1 ... Molten metal container, 2 ... Furnace mouth part, 3 ... Iron shell, 5 ...
… Furnace mouth fitting, 6… Cooling box, 8… Irregular shaped refractory,
10 …… Cooling medium inflow pipe, 11 …… Cooling medium outflow pipe.

Claims (1)

[Scope of utility model registration request] 1. A refractory furnace fitting can be replaced so that the molten metal can flow into and out of the inner peripheral surface of the furnace opening at the molten metal inflow or outflow portion of a molten metal container such as a hot metal car. The cooling box body made of an iron plate is closely attached to the inner peripheral surface of the furnace mouth portion on the furnace mouth joint surface side of the furnace mouth fitting body, and the furnace mouth portion is cooled by the cooling medium through the cooling medium. The inner wall of the molten metal container is formed so as to be freely cooled, and the working surface side of the furnace port fitting is coated with a refractory so that molten metal can flow in and out freely. Construction.