JPH08296982A - Slag carrier pallet - Google Patents

Abstract

PURPOSE: To prevent deformation, run-out and crack or the like generated by thermal effects by consisting of slag resistant bricks and insulating bricks with two layers on a steel-made bottom board as a level block. CONSTITUTION: A level block 2 is installed on the upper part of a pallet while a slag case 3 is loaded on the level block 2. A molten slag is injected from a molten steel ladle 4 into the slag case 3, which is made of cast iron, for example. In this case, the level block 2 is made of bricks and the upper part consists of slag resistant bricks 10 while the lower part consists of insulating bricks 11 and both bricks are installed on a steel-made bottom board 12. Therefore, this construction makes it possible to solve various problems about deformations and cracks of a pallet main body generated from thermal effects and provide a high durability brick-made level board by installing high slag resistant bricks on the upper part and solve run-out problems of the level board and extend service life as well.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slag transportation pallet.

[0002]

2. Description of the Related Art A slag transportation pallet is a pedestal used for improving the efficiency of a physical distribution system, and a steel surface plate is installed on the upper surface. As a slag distribution system, molten slag is poured into a slag case placed on a surface plate, allowed to cool for a predetermined time to solidify the slag, and then the slag case is taken out and transported with a pallet by a transport vehicle.

For example, the molten slag at 1600 ° C. is directly received by the steel surface plate on the upper surface of the pallet, so that the deformation and deformation of the surface plate causes the leakage of water and the heat conduction to the lower part of the surface plate causes the deformation and cracks of the pallet body. There was a problem that occurs.

A steel surface plate is shown in FIG. An example of this thermal analysis is shown below. (Conditions) · Surface plate material: SM400 · Thermal conductivity: 39.7kcal / mh ° C at 800 ° C · Surface plate surface temperature: 1600 ° C (1873K) · Ambient temperature: 30 ° C (303K) · Heat transfer coefficient: 43kcal / m ² h ℃ (Result) In the analysis result assuming the temperature of the upper surface of the surface plate to be 1600 ℃, the rib tip (the part that contacts the lower frame)
The maximum temperature was about 1250K (977 ° C).

Looking at the deformed state, the deformed state is curved as shown in FIG. 4, and the following problems can be expected. A gap is generated at the contact portion between the slag case and the surface plate, causing leakage of hot water. Due to the curved deformation of the surface plate, the load distribution (slag, slag case, surface plate) on the lower pallet is not evenly distributed, and the load is concentrated on the local beam to increase the deformation of the pallet.

[0006]

DISCLOSURE OF THE INVENTION The present invention is intended to solve problems such as deformation, molten metal leakage, cracks, etc., which have been caused by thermal effects due to structural changes of a steel surface plate that is directly subjected to molten high temperature slag. Is.

[0007]

[Means for Solving the Problems] By using a brick material having a low thermal conductivity and an excellent heat insulating property for a surface plate structure, a conventional problem caused by thermal influence can be solved. The brick structure has a two-layer structure, and the upper layer is made of a material that has excellent durability such as erosion considering the slag component, and the lower layer is made of a material that has excellent heat insulation properties. be able to. That is, the present invention is characterized in that, in a slag transportation pallet provided with a slag case detachably provided, a slag resistant brick and a heat insulating brick are formed in two layers on a steel floor plate as a surface plate of the pallet upper surface. It is a slag transportation pallet.

[0008]

Since the surface plate of the present invention has a two-layer structure of a brick made of a steel floor plate and a heat-insulating brick, and a slag-resistant brick, for example, a carbon-based brick, which is laminated on the steel slab, the temperature is, for example, 1600 ° C.
Even if the molten metal slag is injected, the temperature of the lower frame member of the surface plate is about 40 ° C. only by heat conduction analysis, and the heat effect of the surface plate is extremely low compared to the conventional type.

[0009]

EXAMPLE FIG. 1 is a schematic diagram of a slag distribution system, FIG.
Is a sectional view of the surface plate structure of the present invention, and the present invention will be described below with reference to the drawings. First, an overview of the slag distribution system. A surface plate 2 is installed above the pallet 1, a slag case 3 is placed on the surface plate 2, and a molten slag pan 4 is transferred to, for example, a cast iron slag case 3. Inject molten slag.

The slag case 3 is mounted on the surface plate 2 in an airtight manner so that it can be machined, but since the molten slag is viscous, no leakage of molten metal occurs. In the unlikely event of hot water leaks, insert a clay-like thing into the bottom of the slag case or engrave a groove for the slag case. After pouring, the slag is hardened by cooling for a predetermined time, the slag case 3 is extracted, the pallet 1 and the solidified slag 6 are carried by the carrier 5, and only the solidified slag is discharged by the dump function of the carrier 5 at a predetermined place. . The pallet and the carrier are pin-connected.

Next, regarding the surface plate structure which directly receives the molten slag, the planar shape is about 4 m × 7 m, and the sectional structure is shown in FIG. The conventional type is made of steel and has a total height of about 200 mm and a thickness of about 40.
Ribs with a height of mm × 120 mm are arranged at a pitch of about 900 mm.

The invention example is made of brick and has a total height of about 248 mm,
The upper part is made of slag-resistant bricks 10 and the lower part is made of heat-insulating bricks 11 each having a height of about 114 mm, and both bricks are arranged on a steel floor plate 12 of about 20 mm. The height of the surface plate is about 4 compared to the conventional type
Although it is 6 mm higher, the weight of the invention can be reduced by about 4 tons by about 15 tons in comparison with the conventional type by about 19 tons.

In this embodiment, the brick material is selected for the molten high-temperature slag, but it is also applicable to the distribution system of high-temperature materials other than slag because the effect of heat insulation can be obtained by considering the selection of the brick material. be able to.

[0014]

According to the present invention, the thermal conductivity ratio of heat insulating bricks to steel is about 1/250, and it is possible to solve the problems such as the deformation and cracks of the pallet body caused by the heat effect, and By installing the slag brick on the upper part, it is possible to make a surface plate having a brick structure with high durability, and it is possible to solve the problems of deformation of the surface plate and molten metal leakage and to improve the service life. As a result, the cost of repairing the pallet body is reduced and the life of the platen is improved to reduce the cost of consumable parts and contribute to the cost reduction and stable operation of the slag distribution system.

[Brief description of drawings]

1A and 1B are schematic views of a slag distribution system according to the present invention.

FIG. 2 is a sectional view of a surface plate structure according to the present invention.

3A and 3B are explanatory views of a conventional example.

FIG. 4 is a perspective view of a modification of the conventional example.

[Explanation of symbols]

 1 Pallet 2 Surface plate 3 Slag case 4 Pan 5 Carrier 6 Solidified slag 7 Conventional surface plate 8 Invention surface plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Osamu Izumi 12 Nakamachi, Muroran-shi, Hokkaido Nittetsu Muroran Engineering Co., Ltd.

Claims (1)

[Claims] 1. A slag transportation pallet provided with a slag case detachably provided, wherein a slag resistant brick and a heat insulating brick are formed in two layers on a steel floor plate as a surface plate of the pallet upper surface. Transport pallet.