JP3270520B2 - Slag flow switching device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slag flow switching device which branches a smelt gutter provided in a slag treatment facility such as a blast furnace, and switches the flow of the slag alternately from one side to the other. Things.

[0002]

2. Description of the Related Art A slag flow switching device used for branching a smelt gutter provided in a slag treatment facility such as a blast furnace in the middle and switching the flow of the slag alternately from one side to the other. Among them, the one that can withstand use even if switching the flow path is repeated,
At present, it is not an exaggeration to say that only the slag gutter is used. As shown in FIG. 4, the tilt gutter 30 is configured to tilt left and right with the shaft 33 as a fulcrum, and when the slag flows into the upstream slag gutter 31, the tilt gutter 30 is moved in either the left or right direction. It is tilting.

When the inclined gutter 30 is tilted to the left as shown by the broken line, the slag flowing through the upstream molten gutter 31 flows into the inclined gutter 30 and then flows to the downstream side arranged on the left side. Flows into the slag gutter 32, and the slag flowing through the slag gutter 32 is poured into the slag pot 33. Conversely, when the inclined gutter 30 is tilted to the right,
Slag pot waiting on the right side via the right-hand downstream melting gutter 32
33 will be injected.

Japanese Patent Application Laid-Open No. 56-32353 discloses two branch gutters 32a and 32b branched from a slag gutter 31a as shown in FIG.
A weir 34 is provided at the start end of each. As shown in FIG. 6, a wire is attached to the weir 34 from a base 35 that straddles the branch gutters 32a and 32b.
36 makes the cast iron or refractory stopper 37 the branch gutter 32
a and 32b are suspended so that they can be closed. Wires 36 are wound around pulleys 38 a and 38 b provided at both ends of the gantry 35, and the ends of the wires 36 are attached to a lifting / lowering cylinder 39.

Since the weir 34 as described above is provided at the start end of the branch gutter 32a, 32b, for example, the weir of the branch gutter 32a is provided.
While the stopper 34 is closed by the stopper 37, the weir of the branch gutter 32b
When the opening 34 is kept open, the entire amount of the slag flowing down the slag gutter 31a can be flown to the branch gutter 32b. In FIG. 6, the outer peripheral surface of the stopper 37 for closing the branch gutter 32a and the branch gutter 32a
An amorphous refractory or sand is used as a filler for filling a gap formed with the inner peripheral surface of the refractory.

[0006]

As described above, the method of repeatedly switching the flow path of the slag is only the sloping gutter at present, but when installing the sloping gutter, a large head (3.5 in FIG. 4) is required. m) and space is required. In addition, when the slag falls, it may be used in the final stage (pot basin) due to the large amount of residue attached to the head, but it is not suitable for use in the middle of a gutter. There are few use cases.

[0007] For switching in the middle of the gutter, a step is formed at the bottom of the main stream side and the bottom of the branch stream, and a lower gutter is provided with a weir made of easily breakable sand. In addition, there is a method of switching the smelt flow to the lower side of the gutter bottom level by breaking the weir as necessary, but is limited to one-time switching. In addition, the weir described in JP-A-56-323
As disclosed in Japanese Patent Publication No. 53-53, it is often used in combination with a gate type stopper. However, this method has many drawbacks, such that it is difficult to use it continuously many times, and the repair cost is high.

[0008] The present invention solves the problems of the prior art,
It is an object of the present invention to provide a slag flow switching device capable of repeatedly switching a slag flow path without requiring a large head and a space even when installed in the middle of a gutter.

[0009]

According to the present invention, there is provided a slag treatment facility comprising: a slag gutter provided in a slag treatment facility; In a slag flow switching device that alternately switches a slag flow from one side to the other, a gutter bottom is provided with a gutter bottom level of one of a main gutter gutter and a gutter bottom gutter so that the other becomes lower and the other becomes lower. A weir is provided at the upstream end of the slag gutter on the lower level side, a circular flow hole is drilled at the bottom level of the weir, and a slag switching stopper that is removably inserted into this flow hole and opened and closed is a support rod. A slag switching device characterized in that it is fixed to a tip portion of the smelt so as to be able to advance and retreat.

According to the present invention, a tiltable guide channel suspended swingably is provided near the upper part of the weir, and a drifter running along the guide channel is attached. It is preferable that the rear end of the support rod to which the slag switching stopper is fixed is detachably attached. In addition, instead of attaching a slag switching stopper to the socket provided at the tip of the drifter, the rear end of the support rod to which an excavation drill that removes the cooling slag that has solidified in the circulation hole is detachably attached. Can also.

[0011]

Since the present invention has the above-described structure, the smelt switching stopper is inserted into a circular flow hole formed in the weir provided at the upstream end of the slag gutter on the lower level side of the gutter bottom to close the flow hole. The level of the slag upstream of the weir rises or falls depending on whether the slag is blocked or the stopper is removed from the flow hole and opened to allow the slag to pass through the flow hole. Thus, when the level of the slag upstream of the weir rises, the entire amount of the slag flows into the slag gutter on the higher side of the gutter bottom level, and the flow hole is opened to increase the level of the slag upstream of the weir. When the slag falls, the entire amount of the slag flows only to the slag gutter on the lower side of the gutter bottom level.

In the present invention, the slag can be easily switched between the main stream side smelt gutter and the branch side smelt gutter simply by attaching / detaching the stopper inserted into the circular flow hole provided in the weir. Since the smelt passes through the circular flow hole formed in the weir without stagnation, it hardly solidifies and clogs, and the slag flow path can be repeatedly switched. In the unlikely event that the flow hole is clogged with the solidified slag, the hole can be easily opened using a drill.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of an apparatus according to an embodiment of the present invention. As shown in FIG. It branches to the gutter 1b. In this embodiment, the gutter bottom level of the main stream side slag gutter 1a is low, and the gutter bottom level of the main stream side slag gutter 1a is high.
The relationship can be reversed if necessary.

At the bottom level of the weir 2, a circular flow hole 2a is formed.
The stopper 2 (made of cast iron or refractory) fixed to the tip of the support rod 4a is inserted into or removed from the communication hole 2a to close and open the communication hole 2a. Is performed. Next, a driving device of the stopper 4 will be described. The guide channel 10 suspended by the swing arm 9 is supported by a pin 12 at the rear and a wire 12 at the front, and the wire 12 can be tilted through a sheave 15 by an actuator 14 mounted on a bracket 13 of the swing arm 9. Has become. At the time of tilting, the hacker 16 attached to the tip of the guide channel 10 becomes the hacker receiver 17 attached to the slag gutter 1.
Is positioned and fixed.

The drifter 8 is fixed to a carriage 18 and suspended via wheels 19, and the carriage 18 is connected to a chain feed motor 20 by chains 22 via sprockets 21a and 21b provided at both ends of the guide channel 10. The drive of the chain feed motor 20 causes the drifter 8 to move forward and backward. A stopper 4 for slag switching is connected to a socket 6 provided on the drifter 8 via a support rod 4a, and a support rod 4a for supporting the stopper 4 for slag switching.
Of the guide channel 10
Supported by 23.

Next, the operation of the apparatus of the present invention will be described.
As shown in FIG. 1, when the slag 5 flows from the slag gutter 1 to the main slag gutter 1a, the guide channel 10 is retracted to the position shown by the chain line, and the stopper 4 is also at the retracted position. Therefore, the slag 5 flowing down the slag gutter 1 passes through the circular flow hole 2a formed in the weir 2 and flows through the main slag gutter 1a to reach the next step.

When the slag 5 flowing down the slag gutter 1 is switched from the main slag gutter 1a to the branch slag gutter 1b, first, the actuator 14 is actuated and the wire 12 is fed out to the pin 11.
The tip of the guide channel 10 is lowered from the position indicated by the dashed line to the position indicated by the solid line, that is, the position facing the flow hole 2a. Next, the chain feed motor 20 is driven to advance the drifter 8 by the chain 22 via the sprockets 21a and 21b, and the support rod 4 set in the socket 6 is moved.
The stopper 4 having a stopper shape fixed to the distal end portion a is inserted into the circular communication hole 2 as shown by a chain line and closed. As shown in FIG. 2, when the flow of the slag 5 to the mainstream smelt gutter is prevented by the stopper 4 inserted into the weir 2, the slag 5 is pooled on the upstream side of the weir 4 and the smelt gutter 1 b of the diversion-side slag The level of the slag 5 becomes higher than the gutter bottom level, and the entire amount of the slag 5 flowing down in the slag gutter 1 flows into the shunt gutter 1b, and the switching of the flow path is completed.

The diverging side slag gutter 1b is again moved from the mainstream side slag gutter 1
When the flow path is switched to “a”, the switching can be easily performed by extracting the stopper 4 from the flow hole 2 a by the retreat operation of the drifter 8. In this case, the circulation holes 2
In the case where the solidified slag 5a is formed and the slag 5 does not flow into the flow hole 2a, the supporting rod 4a fixing the stopper 4 is removed from the socket 6 as shown in FIG. After attaching the support rod 7a with the fixed 7 to the socket 6, the circular flow hole 2a is opened by advancing and rotating the drifter 8, so that the flow path of the slag 5 can be easily secured.

In some cases, the flow rate can be adjusted by adjusting the stroke for inserting the stopper into the circular flow hole 2a formed in the weir to make the flow hole 2a half open. Furthermore, the main stream side slag gutter 1a and the branch side slag gutter 1b
It is also possible to adopt a split flow system in which the slag 5 is simultaneously poured into both of them.

[0020]

As described above, according to the present invention, the following effects can be obtained. (1) Since there is no need for an installation space and a head unlike a slag-injection gutter, there is little dregs, so that the gutter can be installed in the middle of the gutter without hindrance. (2) Even if the flow path is repeatedly switched, there are few troubles and the maintenance is easy.

(3) The flow rate can be adjusted by adjusting the stroke of the switching stopper (diversion method).

[Brief description of the drawings]

FIG. 1 is a side view showing a device when a stopper is retracted according to an embodiment of the present invention.

FIG. 2 is a side view showing the device when the stopper is inserted according to the embodiment of the present invention.

FIG. 3 is a side view showing the apparatus when the drill for opening according to the embodiment of the present invention is used.

FIG. 4 is a side view showing a conventional slag casting gutter.

FIG. 5 is a schematic plan view showing another conventional example.

FIG. 6 is a schematic front view showing a weir portion structure of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 slag gutter 1a main slag gutter 1b shunt slag gutter 2 weir 2a circular circulation hole 4 stopper 5 slag 6 socket 7 drill for drilling 8 drill lifter 9 turning arm 10 guide channel 11 pin 12 wire 13 bracket 14 Actuator 15 Sheave 16 Hacker 17 Hacker receiver 18 Cart 19 Wheel 20 Chain feed motor 21a Sprocket 21b Sprocket 22 Chain 23 Rod holder

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) C21B 7/14 F27D 3/14 F27D 3/15

Claims (3)

(57) [Claims] 1. A slag flow switching device that branches a slag gutter provided in a slag processing facility into a mainstream slag gutter and a branch slag gutter on the way, and alternately switches a slag flow from one to the other. At
Gutter bottom level of the main stream side smelting gutter and branch side smelting gutter is provided with a step so that one is higher and the other is lower, and a weir is provided at the upstream end of the lower level side of the slag gutter, A circular flow hole is drilled at the gutter bottom level of the weir, and a smelt switching stopper that is removably inserted into the flow hole to open and close is fixed to the tip of the support rod so as to be able to advance and retreat. Slag flow switching device. 2. A tiltable guide channel suspended in a swingable manner is provided near the upper part of the weir, and a drifter running along the guide channel is attached. The slag flow switching device according to claim 1, wherein a rear end of the support rod to which the switching stopper is fixed is detachably attached. 3. A rear end portion of a support rod to which an excavation drill for removing cooling slag solidified in a flow hole is fixed instead of attaching a slag switching stopper to a socket provided at a tip portion of a drifter. The slag flow switching device according to claim 2, wherein