JPS6347840Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a ladle that is tilted to convey high-temperature melt such as molten slag, and to receive and pour out the melt.

[Prior Art] Slag, which is produced in large quantities in the blast furnaces of steel mills, has excellent heat insulation and fire resistance properties, so it is processed into mineral fiber materials such as rock wool and used in various construction materials.

Conventionally, the method used to produce this rock wool is to first cool and solidify molten blast furnace slag discharged from a blast furnace and turn it into crushed slag, then melt it again in a cupola etc. and turn it into fibers in a cotton mill. has been done. The reason why the molten slag is once cooled and solidified in this way is that the solidified slag is easier to handle, transport, etc. than the molten slag.

However, in this method of cooling the molten slag and then remelting it,
This has the disadvantage that a large amount of energy is required for remelting, which in turn increases the manufacturing cost of rock wool. Therefore, recently, a manufacturing method is being adopted that reduces energy consumption by directly injecting molten slag discharged from a blast furnace into a heating and holding furnace of an electric furnace (Japanese Patent Application Laid-Open No. 189284/1984,
(Refer to Japanese Patent Application Laid-open No. 1983-71891).

[The problem that the idea attempts to solve]

A technical problem when producing rock wool from this molten slag is how to transport the molten slag and inject it into a heating furnace such as an electric furnace. The molten slag discharged from the blast furnace is
It is usually transported in large pots with a capacity of 30 to 60 tons. When molten slag is directly injected into the heating furnace from this large pot, a larger volume of molten slag than necessary is transported, which increases handling costs. In addition, since the capacity of the cotton mill that produces rock wool is usually around 5 tons/hour,
In order to process as much as 60 tons of molten slag, the processing process takes a long time.
As a result, there is a problem in that the temperature of the molten slag decreases during treatment, and in some cases it may solidify.

Therefore, it may be possible to use a special pot. but,
This dedicated ladle is tilted when pouring molten slag into a heating furnace such as an electric furnace, and also when discharging stuck slag in the ladle after injection. During these handling operations, the dedicated ladle is heated to a high temperature due to the heat held by the molten slag contained therein, and the cast steel material that constitutes the special ladle is subjected to large thermal stress. When a special pot in such a state is tilted on the same fulcrum, the weight of the pot itself and the molten slag will be applied to a specific location, making that location prone to cracking, destruction, deformation, etc.

Furthermore, the occurrence of such defects is not a problem limited to when handling molten slag, but also occurs when high-temperature melts such as molten metals are transported using an intermediate ladle.

Therefore, the present invention was devised to prevent the occurrence of defects in this type of transport pan, and by changing the support point of the pan in each handling process, the force applied to the transport pan is distributed. The present invention aims to provide a transport pot that can be used for a long period of time by preventing local deformation.

[Means to solve the problem]

In order to achieve this purpose, the present invention is a melt transport ladle that is used by being separated from a pan transport trolley and transported to a stand installed at a pouring location, which engages hooks of an overhead crane at both ends. A trunnion is provided, and a total of four first brackets are provided on both sides of each trunnion for use when tilting the conveying pot at a small angle on the stand, and the conveying pan is tilted at a large angle on the pot conveying trolley. The present invention is characterized in that a total of four second brackets, which are sometimes used, are provided on the opposite side of the first support section from the trunnion.

〔Example〕

Hereinafter, features of the present invention will be specifically explained with reference to embodiments shown in the drawings.

FIG. 1 is a partially cutaway side view of the transport pan in this embodiment, and FIG. 2 is a top view of half of the transport pan.

This transport pot 1 is provided with a pair of trunnions 2 at symmetrical positions on the outer periphery, and two sets of removable brackets 3a, 3b and 4a, 4b are provided so as to sandwich each trunnion 2. And these brackets 3a, 3b and 4a,
4b are used in separate steps as described below.

The mode of use of the transport pot 1 will be explained by taking as an example the transport of molten slag during the production of rock wool. FIG. 3 is a diagram showing a handling system in which the transport ladle 1 is used to transport molten slag discharged from a blast furnace to a heating furnace for producing rock wool.

High-temperature molten slag discharged from a blast furnace (not shown) is poured into a large ladle 10 and transported to a trolley 11.
The slag is transported to a slag treatment plant. During this transport, the required amount of molten slag is transferred from the large ladle 10 to the transport ladle 1. On the other hand, the remaining molten slag is transported to a slag processing plant by a large pot 10, cooled and crushed, and used as a material for ballast and the like.

The transport pot 1 is loaded on a transport trolley 12 equipped with a tilting device. The conveyance pan 1 is conveyed by this conveyance trolley 12 into a factory building (not shown) in which a heating furnace and a cotton mill are arranged. Then, the transportation trolley 12 and the transportation pot 1 are placed at a predetermined place in the factory building.
The hook 33 of the fixing device (see Fig. 5) is released, the trunnion 2 of the transfer pot 1 is engaged with the hook of the overhead crane 13, and the transfer pot 1 is transferred to the stand 14 provided at the pouring place. I'll ride it.

This stand 14 has a tilting mechanism 1 for tilting the transfer pot 1 as shown by the dashed line in FIG.
5. The conveying pot 1 placed on the stand 14 is set on the stand 14 by a support section to be described later. Next, by tilting the transfer ladle 1 with the tilting mechanism 15, the molten slag in the transfer ladle 1 is injected into the heating furnace 17 via the molten slag receiving gutter 16. The heating furnace 17 used here is an electric furnace.

After the molten slag injection work is completed, the fixation between the stand 14 and the transport ladle 1 is released, and the transport ladle 1 is placed on the transport trolley 12 by the overhead crane 13. Then, the transport pot 1 is fixed on the transport trolley 12 and moved to a slag treatment plant. At the slag treatment plant, the slag that has adhered to and solidified on the transport pan 1 is removed from the transport pan 1 by tilting the transport pan 1. At this time, since it is necessary to tilt the transport pan 1 at a large angle, for example, 100 degrees or more in order to discharge the stuck slag, it is required to ensure the engagement of the transport pan 1 with the transport trolley 12. .

Thereafter, the conveyance ladle 1 is stood upright and conveyed again to a place where the molten slag is received from the large ladle 10.

In this way, the transport pot 1 is tilted while being placed on the stand 14 in front of the heating furnace 17, and is also tilted while being placed on the transport trolley 12 in the slag processing plant. Since this tilting in front of the heating furnace 17 is for injecting molten slag into the heating furnace 17, a tilting angle of about 60 degrees may be sufficient. On the other hand, the tilting in the slag treatment plant needs to be performed at a large tilting angle as described above. Therefore, in this example, separate tilting means are employed depending on the magnitude of the tilting angle.

FIG. 4 explains the tilting means in the stand 14. The stand 14 has a rectangular parallelepiped lattice frame 18 as shown in FIG.
A space 19 for placing the transport pot 1 is formed in the center. A support portion 20 for receiving the brackets 3a, 3b of the transfer pot 1 is provided at a predetermined location of the framework 18. A hydraulic cylinder 21 is disposed on at least one side of this framework 18, and by extending this hydraulic cylinder 21, the bracket 3a or 3b of the transfer pot 1 is engaged with the support portion 20. After the transfer pot 1 is set on the stand 14 in this manner, the tilting mechanism 15 such as a jack shown in FIG. 1B is driven. This results in
The framework 18 rotates around the fulcrum 22 and lifts the transport pot 1 to the state shown by the dashed line in FIG. 3.

Figure c shows the bracket 3a or 3b at this time.
The engagement relationship between and the support portion 20 is shown. The support portion 20 has a groove portion 23 into which the bracket 3a or 3b fits.
is formed. A hole is provided in the support portion 20 and the brackets 3a, 3b through which the rod 24 of the hydraulic cylinder 21 passes when the bracket 3a or 3b is dropped into the groove portion 23. In this way, the brackets 3a and 3b are attached to the support part 2.
0, the brackets 3a and 3b will not come off from the support portion 20 even in an emergency such as an earthquake.

Here, by providing the brackets 3a and 3b near the trunnion axis, they are separated from the flow of molten slag due to tilting. Therefore, the brackets 3a,
3b is less susceptible to rapid thermal changes.

On the other hand, in the slag treatment plant, the transport pan 1 is tilted while being placed on the transport trolley 12. FIG. 5 is a diagram showing the transport trolley 12 in detail. An annular support arm 25 for supporting the transport pan 1 is provided at the center of the transport trolley 12. The opposing portion of the support arm 25 is connected to a rotational drive mechanism 27 via a shaft 26. Furthermore, support portions 28 are provided at four locations on the support arm 25 to engage with the brackets 4a and 4b. The support portion 28 is provided with a hook 33 that swings by a cylinder 29, as shown in a cross-sectional view, a top side view, and a partial side view in FIGS. That is, the expansion and contraction movement of the cylinder 29 is converted into the rotational movement of the shaft 30, and the support arm 2 is moved through the link 31.
The hook 33 provided at 5 is swung. By raising this hook 33, its tip 3
3a to press the protruding parts of the brackets 4a and 4b. As a result, the transport pan 1 is reliably supported by the support portion 28, so even if the transport pan 1 is tilted at a large angle and a blow is applied to discharge all the slag stuck to the transport pan, the transport trolley The transport pot 1 will not fall off from the container 12. In addition, cylinder 29
The brackets 4a, 4b and the hook 33 can be engaged and disengaged by remote control.

In this example, when the tilting angle is large, the carrier pot 1 is supported at four points arranged at equal intervals around the carrier pot 1. That is, since a large force is applied to the transport pan 1 during such tilting, the entire wall of the transport pan 1 receives as much of the force as possible. On the other hand, when the tilting angle is small, the conveying pan 1 is supported at locations closer to the trunnion 2 than those four points. In this way, by changing the support location of the transport pan 1 according to the tilting state, it is possible to prevent force from being concentrated on a specific location of the transport pan 1.

Furthermore, the brackets 3a, 3b, 4a, 4b are
Since it is not integrated with the transfer pot 1 and is provided in a replaceable manner, the transfer pot 1 may become thermally deformed after being used for a long period of time, and the stand 14 installed at the pouring location may
Alternatively, if the connection between the pot transporting trolley 12 and the support arm becomes malfunctioning, the brackets 3a, 3 should be adjusted so that the connection becomes normal according to the deformation of the transport pot.
Only b, 4a, and 4b can be used by replacing them. Therefore, the usable period of the transport pan 1 can be extended.

[Effect of idea]

As explained above, in the conveying pan of the present invention, the conveying pan is supported at a location that matches the tilting conditions, so that force is not concentrated on a specific location of the conveying pan. In particular, since the conveying ladle of the present invention accommodates and conveys a high-temperature molten material, the body of the ladle is subject to thermal stress.
Prevent cracks, damage, deformation, etc. In addition, even if the transport pot becomes deformed after long-term use, the bracket can be replaced at will, so by replacing it with a bracket with dimensions that correspond to the amount of deformation, the transport pan can be used in a stable shape for a long period of time. It is extremely effective.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway sectional view of a conveying pan according to an embodiment of the present invention, and FIG. 2 is a top view of half of the conveying pan. In addition, Fig. 3 shows a handling system for molten slag using this transfer ladle, Fig. 4 explains the tilting of the transfer ladle on the stand, and Fig. 5 shows the state in which it is placed on a conveyance trolley. This explains the tilting of the conveyor pan.

Claims (1)

[Scope of Claim for Utility Model Registration] A molten material transporting pot that is used by being separated from a pot transporting trolley and transported to a stand installed at a pouring location, which is provided with trunnions at both ends that engage with the hooks of an overhead crane, A total of four first brackets are provided on both sides of each trunnion to be used when tilting the conveying pot at a small angle on the stand, and are used when tilting the conveying pan at a large angle on the pot conveying trolley. A melt conveying ladle characterized in that a total of four second brackets are provided on a side further opposite to the trunnion from the first support part.