JPS6121860B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pig iron mixer car that is devised so that hot metal inside the mixer car can be quickly removed in the event of an accident.

[Conventional technology]

Today, most of the processes in which hot metal from blast furnaces is turned into steel at steel plants use a system in which the pig iron is stored in a mixer truck and transported to the steel plant. The pig iron mixer used in this process has the structure shown in Figure 1, and the steel shell is an integral structure that cannot be divided. In addition, the only opening provided in the iron skin is the pigtail hole located in the center of the main body (some types have desulfurization ports on both sides of the pigtail hole).

[Problem that the invention attempts to solve]

For pig iron mixers with such a structure, if the hot metal solidifies inside the mixer car due to various troubles during transportation and operation, or problems with ingot making equipment including converters, other smelting furnaces, and tundishes in the subsequent process, It is impossible to dismantle. Furthermore, even if it were possible to dismantle the car, the iron mixer car itself would have to be scrapped due to the dismantling of the shell.

The present invention was devised in view of the problems with conventional pig iron mixers, and when the above-mentioned troubles occur, the pig iron mixer cars can be quickly dismantled, and as a result, the pig iron mixer cars can be dismantled quickly. To easily discharge solidified hot metal inside a car and to enable reuse of a pig iron mixing car without damaging the shell.

[Means for solving problems]

In order to achieve the object of the present invention, the pig iron mixer car body is divided into an upper radius portion and a lower radius portion along the horizontal axis, and the inner lining portion is connected with a jig at the joint of each divided body. It is separably and hermetically joined to a fixed receiving metal part by fire-resistant mortar, and a connecting flange is provided at the joint part of the outer shell, and a hook latch for lifting is attached to the upper radius shell. do. Note that in this configuration, the shell is understood as an integral body of the iron skin or the iron skin and the lining.

〔Example〕

Next, the features of the present invention will be specifically explained with reference to the embodiments shown in FIGS. 1 to 3.

The pig iron mixer body 1 has a lower radius portion 2 which is an integrally molded product.
and Ciel divided into multiple parts 3-1, 3-2, 3-
It is constituted by an upper radius part 3 consisting of 3. Each shell 3-1, 3-2, 3-3 and the lower radius part 2 and between each shell 3-1, 3-2, 3-3 are made of metal fittings reinforced with flanges and ribs, which will be described later, and fire-resistant mortar. They are connected by a close bonding structure 4 using, etc. In the figure, 5 is a running trolley on which the pig iron mixer body 1 is rotatably mounted by a rotation mechanism (not shown);
6 is a wheel of the pig iron mixer, 7 is a slag adhesion prevention plate that prevents slag etc. from adhering to the close joint structure 4 when pouring hot metal into the pig iron mixer body 1, and 8 is a shell 3-
This is a hook latch that engages with the hook of an overhead crane or the like (not shown) used in the separation/connection work of 1, 3-2, and 3-3.

Details of the close contact structure 4 are shown in FIG. The mechanism is configured to satisfy the following conditions.

The shell can be easily separated from the flange surface (this allows separation to be performed without applying a strong impact).

The steel shell and inner lining must be able to be separated as a single unit, and in particular, the inner lining made of refractory material must maintain its strength as a structure, and the refractory material (brick, etc.) on the joint surface will not be destroyed.

Steel shells can be easily joined and restored without damaging the lining refractories.

The structure must be such that it can fully achieve its purpose as a pig iron mixing vehicle without being penetrated by slag, hot metal, etc. from the joint surfaces during operation.

In order to satisfy the above conditions, the steel shell has the following flange connection. That is, the iron skin of shells 3-1, 3-2, 3-3 and the lower radius part 2
is connected to the steel shell by tightening the flanges 9 and 9' with bolts 10. At this time, the bolt holes provided in the flanges 9 and 9' are
The holes are long in consideration of the distortion of the steel shell, which improves the workability of tightening work. Furthermore, in order to prevent deformation of the steel shell joint, shells 3-1, 3-
The back surfaces of 2 and 3-3 are reinforced by ribs 11 and 11'.

Next, the structure of the inner lining at the joint will be described. Separated shell 3-1,3-
2, 3-3 and the lining of the lower radius portion 2 are separably joined via brick receiving metal fittings 12, 12'. These brick receiving hardware 12, 12' are
It is reinforced with ribs 11 and 11' and is made of a material that can maintain sufficient strength and thermal durability. In addition, the receiving metal parts 12, 12' are placed around the lining to prevent the inner lining from falling off.
Preferably, the length is 1/2 or more. Furthermore,
The shape of the joint surface of the wear lining is such that convex dowels 13 and 13' are fitted together as shown in FIG. 4, and the structure is such that the hot metal can prevent the penetration of slag. The joints are connected with refractory mortar to prevent penetration of hot metal and to facilitate attachment and detachment of the shell. Further, it is desirable that the wear lining of this joint be made of a material that is excellent in corrosion resistance and spall resistance.

Next, repair work for a pig iron mixer truck according to an embodiment will be explained.

When the hot metal solidifies in the pig iron mixer body 1, the bolts 10 are loosened to release the flange connection, and the hook of an overhead crane or hoist device (not shown) installed in the repair shop is engaged with the hook latch 8. , the shells 3-1, 3-2, and 3-3 are lifted up and separated from the lower radius part 2, and the upper part of the lower radius part 2 is completely opened. After opening, the main body 1 is rotated by a drive device (not shown) of the pig iron mixer main body 1, and is tilted so that the opening thereof faces downward. By this tilting operation, most of the metal solidified in the furnace is discharged from the inside of the pig iron mixer body 1 to the outside of the furnace due to its own weight. The metal that cannot be discharged due to its own weight is peeled off from the inner wall of the pig iron mixer car by applying a mechanical impact, and then falls and is discharged from inside the pig iron mixer body 1.

FIG. 5 shows another embodiment of the pig iron mixing vehicle of the present invention. Since the shells of this pig iron mixer car can be separated and joined, the entire lining of the pig iron mixer car is made of monolithic refractory material, which saves labor and costs in disassembly and construction.

In this embodiment, the lower radius portion 2 and the shell 3-
1, 3-2, and 3-3, castable refractories can be poured or troweled using a formwork (not shown). Anchor bricks 14 and metal fittings 15 are used to reinforce the castable refractory lining provided on the removable shell. In addition, in order to prevent hot metal from directly invading the joint, the inner wall of the joint is closed at the joint 16 when or after closing the upper shell.
As a result, spray material is sprayed from inside the furnace. Alternatively, when closing the upper shell, the plastic
Place the castable refractory in the area larger than the dimensions,
The joint joint 16 can be filled by sandwiching and compressing the plastic, castable refractory, etc. arranged between the upper shell and the main body, or by applying plastic, castable refractory, etc. to the joint from the inside after closing. can be formed.

〔Effect of the invention〕

As explained above, the pig iron mixer of the present invention has the following effects.

By simply separating the shell that makes up the upper radius and tilting the mixer body, the solidified metal inside the mixer car can now be easily discharged from the furnace without damaging the shell. It also becomes possible to restore the shell after discharge and reuse the pig iron mixer itself.

The ability to separate and join the shells allows for interchangeable shell designs and pre-installation of refractory linings in the furnace, especially castable refractories. Therefore, it is possible to save labor in constructing the furnace.

By making the shell separable,
Repair work can be performed by removing only the split shells that actually require repair from the main body.
Therefore, repair work can be made more convenient and efficient.

[Brief explanation of the drawing]

Fig. 1 is an overall front view of a conventional pig iron mixer car, Fig. 2 is an overall front view of the present invention pig iron mixer car, and Fig. 3 is a general front view of a conventional pig iron mixer car.
4 is an enlarged explanatory view of the tight joint structure in FIG. 3, and FIG. 5 is a sectional view taken along the line in FIG. 2 of the pig iron mixer of the present invention constructed with poured refractories. DESCRIPTION OF SYMBOLS 1...Pig mix car body, 2...Lower radius part, 3...Upper radius part, 3-1, 3-2, 3-3...Divided shell, 4...Tight joint structure, 5...Traveling bogie, 6...
...Wheel, 7...Slag adhesion prevention plate, 8...Hook latch, 9,9'...Flange.

Claims (1)

[Claims] 1 The pig iron mixer body is divided into an approximately upper radius portion and a lower radius portion along the horizontal axis, and the joint portion of each divided body is separated by a receiving metal fitting fixed with a jig and fireproof mortar at the inner lining portion. A pig iron mixer vehicle having a shell that can be freely attached and detached, characterized in that the outer shell joint part is provided with a coupling flange, and the upper radius shell is provided with a lifting hook latch.