JPH0410207Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a continuous blast furnace slag processing apparatus for recovering granular pig iron in the slag discharged from a blast furnace.

(Prior Art) Conventionally, as this type of continuous blast furnace slag processing equipment, a slag separation vessel having an appropriate step in the middle of a slag flow path and a molten metal discharge port at the bottom is used. It is known to be arranged so as to be tiltable in a direction perpendicular to the direction of the slag flow path.

(The problem that the idea attempts to solve) However, the above method has the following problems.

(a) When changing the gutter in the slag flow path, everything from installing and clearing the partition iron plate to maintenance is done manually in a high temperature and adverse environment, so it is necessary to eliminate this. (b) In addition, when replacing or repairing the pig slag separation container, the slag gutter located above the pig slag separation container interferes with the work, making the work extremely difficult. It was necessary to move it to a new location.

(Means for Solving the Problems) The present invention was made to solve the above-mentioned drawbacks. A slag separation vessel having a plurality of slag drainage channels formed in the upper side in the direction of the slag flow path is arranged with appropriate steps in the middle of the slag flow path. This continuous processing apparatus for blast furnace slag is characterized in that the pig slag separation container is configured to tilt or travel in a direction intersecting the direction of the slag flow path.

(Function) The present invention has an effect that the slag discharge path can be automatically switched alternately when the slag separator is tilted or moved during slag processing.

(Example) Hereinafter, an example of this invention will be described based on the drawings.

Fig. 1 is a schematic plan view of the device according to the present invention installed, Fig. 2 is a plan view of the device, Fig. 3 is a cross-sectional view taken along line A-A of the device in Fig. 2, and Fig. 4 is a schematic plan view of the device according to the present invention. FIG. 2 shows a cross-sectional view taken along line B-B of the apparatus and the slag gutter in FIGS. 1 and 2.

First, in FIG. 1, a skimmer 10 is provided downstream of a large gutter 9 connected to a furnace body 18, and a slag gutter 1 is provided on the furnace body side with the skinmer 10 in between.
A hot metal trough 6 is arranged on the reactor side.

Further, at the downstream end of the slag trough 1, a slag separation container 2 is arranged with an appropriate level difference, and a fixed position slag discharge passage 2a is provided at the upper part of the slag separation container 2. A sludge drainage channel 2b is provided, and a tilting trough 3 and a trough for the water frame or dry pit (hereinafter referred to as water frame trough 4) are branched with an appropriate step below the sludge channel 2b. It forms a flow path for slag.

Further, the slag separation vessel 2 is provided with a hot metal return gutter 5 that intersects with the slag flow path direction, and the return gutter 5 merges into the hot metal gutter 6.

Next, the present device will be explained in more detail based on FIGS. 3 and 4.

The slag separation container 2 has an inner wall made of, for example, a steel plate lined with a refractory material 19, and has two slag drainage channels, a fixed position slag drainage channel 2a and a slag discharge channel 2b, on the downstream side wall of the slag. have.

In addition, the elevation forming part 2 is provided with an appropriate angle on the tilting side.
d, and has an iron exhaust port 2c and an iron exhaust trough 2e at the lower end of the elevation forming part 2d.

The slag separation container 2 has a tilting frame 11 on an arc.
is placed on top.

The tilting frame 11 includes a plurality of tilting wheels 11a.
is attached and rotatably placed on the arc-shaped tilting rail 14a on the upper part of the traveling carriage 14.

Further, a gear 12 connected to a tilting drive device 13 is engaged with a pin gear 11b attached to the lower end of the tilting frame 11.

Next, the traveling truck 14 has a plurality of traveling wheels 14b.
with floating frame 15 or fixed frame 15
It is placed on the running rail 15c above a.

A suitable number of running wheels 14b are connected to a sprocket wheel 14c which is engaged by a roller chain 14d to a sprocket wheel 14e connected to a running drive 14f.

Further, the floating frame is placed on the load cell 16 so as to be freely movable in the horizontal and vertical directions by an appropriate amount, and is connected to the fixed frame 15a by a link type connecting fitting 15b.

Next, a case will be described in which the apparatus configured as described above is used to separate pig iron slag. Hot metal discharged from the furnace body 1 is separated into hot metal and molten slag by a skimmer 10 provided in a large gutter 9. The slag separated by this skimmer 10 is sent through an upstream slag gutter 1,
After flowing into the slag separation vessel 2 and settling the granulated pig iron in the slag to the lower part of the slag separation vessel 6, it passes through the fixed position slag drainage path 2a or the slag drainage path 2b during iron removal, and then flows into the tilting trough. The slag is sent to the slag 3 or the slag 4. At this time,
The granular pig iron that has settled at the bottom of the pig iron slag separation vessel 2 is accumulated and becomes hot metal, and when this hot metal reaches a suitable amount, the pin gear 11b and gear 12 attached to the lower part of the tilting frame 11 are operated via the tilting drive device. As a result, the pig iron slag separation container 2 is tilted toward the elevation forming part 2d as shown in FIGS. to recover. At the time of pig iron removal, the slag flows to the downstream side slag trough through the slag discharge path 2b during pig iron removal.

After tilting the pig iron slag separation container 2 and discharging the accumulated hot metal, it is reversed and the pig iron slag separation container 2 is returned to its normal position.

Next, we will discuss the gutter switching mechanism used to transport slag. The traveling truck 14 is driven by a driving device 14f, sprockets 14c and 14e, and a roller chain 14.
d. By running and moving via the running wheels 14b, the outlet of the discharge channel 2a or 2b of the pig iron slag separation container 2 is moved to the downstream side of the tilting slag slag 3 and the granulated slag slag 4.
Gutter switching is performed by selectively adjusting to the

Next, with reference to FIGS. 5 to 8, the operation of the slag separation vessel 6 and the connection between the upper and lower slag troughs and the slag return trough 5 will be explained. Figure 5 shows a state in which molten slag is being flowed to the slag gutter 4 in a fixed position, and Figure 6 shows a state in which molten slag is being flowed to a tilting trough and slag trough 3 in a fixed position. . Figure 7 shows the flow of molten slag to the water crushing slag trough 4 during pig iron removal, and Figure 8 shows the state in which the molten slag is transferred to the tilting slag trough 4.
Indicates the state of being transported to. Here, the positions of the outlets of the slag exhaust flow path 2a at the regular position and the outlet of the slag exhaust flow path 2b during pig iron removal substantially coincide.

That is, in Fig. 5, the upstream slag gutter 1 and the slag discharge port 2
a, and in Fig. 7, the upstream slag gutter 1 and the slag discharge port 2b
The centers of each droplet almost coincide.

Moreover, the distances ○ and C in FIG. 6 and FIG. 8 are approximately the same.

This means that the position of the slag flowing down to the downstream slag trough is almost the same whether it is in a fixed position or during pig removal.

As shown in FIG. 2, the upstream side of the slag discharge channel 2b is bent in the tilting direction. This is because the slag does not flow out from the slag discharge channel 2b at the fixed position.

In FIG. 5, there is a correlation between the angle ○a formed by the bottom surface of the pig iron slag separation container 2 and the gutter switching travel distance ○b. In other words, the larger ○B is, the larger ○B can be taken. It depends on the terms of arrangement with the surrounding equipment, but
In actual equipment, ○A is approximately 25 to 35 degrees, and ○B is 700 to 800 mm.
That's about it.

Note that, as shown in FIG. 3, the plurality of load cells support a load greater than that of the floating frame. This is to detect an increase in the amount of hot metal in the pig iron slag separation vessel 2 using the load cell and to accurately determine the time to discharge the pig iron.

As described above, whether the slag separation container 2 is in the fixed position or when the pig iron is being discharged, and whether the slag is in the tilting trough or the water crushing trough, the slag is transferred from the upstream slag trough 1 to the slag separation container 2. After the slag flows into the slag and settles the granulated pig iron in the slag, it passes through the slag discharge channel 2a or 2b to the downstream slag trough 3.
Alternatively, the molten slag can be continuously processed because it can be sent to 4.

Next, replacement of the pig iron slag separation container 2 will be explained based on FIG. 3.

When replacing the pig iron slag separation container 2, first, tilt the container 2 so that it does not interfere with the upstream slag gutter 1 when moving, and bring it into the same state as when discharging pig iron. . Thereafter, the traveling truck 14 is placed in the 2' position, the hanging tool 17 is attached to the pig iron slag separation container 2, and the container 2 is lifted up to the 2'' position using a casting bed crane.
In the 2', 2'' state, the pig slag separation container 2 does not interfere with the upstream slag gutter 1, so it can be easily lifted.When setting the pig slag separation container 2 on the tilting frame 11, the above removal Perform the opposite operation.

(Effects of the invention) As described above, the present invention processes the slag continuously, so that the granular pig iron in the slag can be efficiently separated by sedimentation and recovered. It is less affected by. Furthermore, since the stored hot metal can be tapped during continuous slag processing, the capacity of the slag separation vessel can be determined only from the sedimentation separation effect of the granular pig iron, and is not affected by the number of taps or the like. Further, it is possible to greatly reduce the work required in the above-mentioned high heat and adverse environment.

In addition, since the slag flow path is switched by traveling through the slag separation vessel, the input work for switching the slag sluice is omitted, and the movement when replacing the slag separation vessel is also mechanized, so there is no need for casting during tapping. It has extremely excellent effects, such as greatly contributing to labor savings in floor work.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view of the device according to the present invention installed, Fig. 2 is a plan view of the device, Fig. 3 is a cross-sectional view taken along line A-A in Fig. 2, and Fig. 4 is a schematic plan view of the device according to the present invention. Figure 2 is a cross-sectional view taken along line B-B in Figure 2, and Figures 5 to 8 are drawings showing the operation of the pig iron slag separator of this device and the connection relationship between the upper and lower slag gutter and the hot metal return gutter. The figure shows the molten slag flowing to the fracking side in a fixed position, Figure 6 shows the molten slag flowing to the tilting trough side in a fixed position, and Figure 7 shows the molten slag flowing to the fracking side during iron removal. Figure 8 shows the molten slag flowing to the side of the tilting trough during iron removal. 1... Upstream slag gutter, 2... Pig slag separation container, 2
a...Fixed position slag drainage path, 2b...Slag removal path during iron removal, 2
c...Pigtail outlet, 2d...Elevation formation part, 2e...Pigtail discharge trough, 2f...Slag level, 3...Tilt slag trough, 4...Water slag trough, 5-turn molten pig iron return Gutter, 6...
Hot metal trough, 7...Tilting trough, 8...Water granulation manufacturing equipment, 9
...Gutter, 10...Skinmer, 11...Tilt frame, 11a...Tilt wheel, 11b...Pin gear, 12...Gear, 13...Tilt drive device,
14...Traveling trolley, 14a...Tilt rail, 1
4b... Traveling wheel, 14c and 14e... Sprocket wheel, 14d... Roller chain, 14
f... Traveling drive device, 15... Floating frame, 1
5a...Fixed frame, 15b...Connection fittings, 1
5c...Running rail, 16...Load cell, 1
7... Pig slag separation container hanging tool, 18... Furnace body, 19
...Refractories, 2'...Pigtail slag separation container in replacement position, 2''...Pigtail slag separation container in lifted state.

Claims (1)

[Scope of Claim for Utility Model Registration] In a continuous treatment device for blast furnace slag that collects granular pig iron in slag discharged from a blast furnace, an exhaust port is bored in the lower part and the slag flows in the direction of the upper part. A slag separation container, which previously formed a plurality of slag drainage channels, is placed in the middle of the slag flow path with an appropriate step difference, and the slag separation container is tilted in a direction perpendicular to the direction of the slag flow path. Alternatively, a continuous processing device for blast furnace slag is characterized in that it is configured to run.