JPH0593216A - Method and device for changing flowing direction of molten slag - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To provide a method and a device for repeatedly dividing or switching the blast furnace slag flow at an arbitrary ratio. [Structure] A branch part having a high discharge level is provided in a part of the molten slag girder 2, a weir 5 projecting from both wall surfaces is provided at a downstream position close to the branch part, and a stopper 4 that moves up and down on the upstream side of the weir 5. The level of the molten slag is raised by this stopper 4 and the flow is divided. Further, the flow of the blast furnace molten metal flow is changed by a device including an elevating mechanism for moving the stopper 4 up and down along the guide channel and a swivel mechanism for swiveling the elevating part to retract from the gutter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for changing the flow of slag flow. In the following, the change of the flow of the blast furnace molten slag is not limited to branching, branching, switching, etc. as long as it changes the flow of the molten slag, and includes all.

[0002]

2. Description of the Related Art Generally, when the flow of blast furnace slag is changed on a gutter, an ON-OFF system is used, that is, a system in which the entire amount is supplied to one and nothing is supplied to the other. The method used at this time is, for example, JP-A-56-3.
As shown in Japanese Patent No. 2353, a method of installing a stopper on a weir for switching a flow path provided at either one or both of a branch gutter starting end, or a molten slag as shown in Japanese Utility Model Publication No. 57-15249. A method of using a stopper that moves in the vertical direction is known.

Further, as a flow rate adjusting method, an actual method is used.
As disclosed in Japanese Laid-Open Patent Publication No. 26001, a method has been proposed in which an opening portion is provided in an amorphous refractory material and a fixed amount is cut out.

[0004]

However, it is difficult to repeatedly adjust the flow rate by the required amount by the ON-OFF type switching method of the slag and the fixed-quantity cut-out type flow rate adjusting method shown in these conventional examples. In addition, there is a problem that quantitative cutting cannot be performed by the method of providing the opening portion in the amorphous refractory material.

It is an object of the present invention to solve the above problems and propose a technique capable of repeatedly switching the molten slag to a required flow rate ratio.

[0006]

Means for Solving the Problems That is, according to the present invention, when changing the flow of molten slag in the middle of the blast furnace molten slag, the downstream of the slag flow switching gutter arrangement part in which the gutter bottom is higher than that of the smelt gutter,
The stopper for swirling the molten slag is swung down to stop the molten slag, and the level difference between the gutter bottom of the switching gutter and the surface of the slag is adjusted to make it overflow to the switching gutter side. When changing the flow of molten slag in the middle of the slag, a weir provided in a part of the gutter width direction and a weir in front of this weir are provided downstream of the slag flow switching gutter arrangement part where the gutter bottom is higher than that of the smelt gutter. With a stopper having a molten slag flow channel width or more and a gutter width or less, the level difference between the switching gutter bottom and the molten slag surface is adjusted by the operation of an elevating device equipped with the stopper to change the flow of the molten slag,
Also, in the middle of the blast furnace molten metal gutter, in a stopper lifting device that changes the flow of molten metal flow, a lifting mechanism that moves up and down along the guide channel of this lifting device and the lifting part of this lifting mechanism are swung to move the molten grate up. It is characterized by comprising a stopper elevating device composed of a swivel mechanism for retracting from.

The structure of the present invention will be described in more detail below. The slag switching gutter (newly branched slag gutter) side is made higher than the normal gutter to raise the slag level and switch the slag. As a means for increasing the surface level of the molten slag at the switching portion, a stopper is provided at a part of the rear end of the switching portion in the gutter width direction, or a weir is provided at the stopper. The shape of the weir is a rectangle that enhances the stopper effect. The width of the stopper is not less than the channel width narrowed by the weir and not more than the gutter width. The difference in level between the switching section gutter bottom and the molten slag surface is caused by the operation of a stopper elevating device that has a stopper and an elevating mechanism and a swivel mechanism that swivels the elevating part of the elevating mechanism to retract from the top of the molten grate. It can be adjusted to achieve changes in the slag flow.

[0008]

As described above, according to the present invention, a gutter bottom level for switching the slag surface level by providing a stopper or a stopper and a weir downstream of the gutter side where the slag is flowing in the slag switching part is provided. Since the level difference between and can be controlled at any distance at all times, it is repeated by lowering the lifting device equipped with a stopper when changing the molten slag and by raising the stopper lifting device when stopping the switching. Can be operated.

To further explain the effect of the stopper of the present invention, the stopper is brought into contact with the molten slag only during the switching in order to lower the stopper and raise the molten slag level to flow to the switching side only when switching. Only by doing so, there is little wear, and sufficient time for repairs can be taken. Since the weir is provided at the rear of the stopper, the stopper is pressed by the weight of the molten slag to be stored and the sealing effect is exhibited. Since it is used only when switching, it is easy to separate it when restoring to the original. Since the level of the molten slag is increased by lowering the stopper and the molten slag can be supplied to another passage while the level of the slag is sufficiently stored, it is possible to reduce adhesion and solidification slag when the stopper is raised. When the stopper is lifted, it will flow out to the original passage, but a large amount of slag will flow at once, so the cleaning effect on the weir surface etc. can be expected and maintenance can be reduced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic plan view showing a state in which the downstream side is closed by using a stopper having a width corresponding to the gutter width of the molten sluice and the level is adjusted to overflow the molten slag to the switching gutter side. 2 is a schematic plan view of one embodiment of the present invention, FIG. 3 is a perspective view of FIG. 2, and FIG. 4 is a side view of an apparatus for changing the flow of molten slag. Reference numeral 1 is a slag, 2 is a slag gutter, 3 is a switching gutter, 4 is a stopper, 5 is a weir, 6 is a support, 7
Is a turning beam, 8 is a guide channel, and 9 is a lifting / lowering mode.
, 10 is a turning motor, 11 is a chain, 12, 13, 1
Reference numerals 4 and 15 are sprockets, 16 is an elevator, 17 and 18 are guide rolls, 19 is a base, 20 is a fixing agent, 21 is a heat insulating plate, 22 is a bolt, and 23 is a cotter.

First, as shown in FIG. 1, FIG. 2 and FIG. 3, the molten slag 1 discharged from the blast furnace and separated in the large gutter is usually passed through a slag gutter 2 or a switching gutter 3 to form a water granulation facility and a slow cooling pit. , Sent to different equipment such as slag pan.

According to the present invention, since the weir 5 and the stopper 4 are provided at a part in the gutter width direction downstream of the gutter side where the molten metal of the molten metal flow switching part is newly flowing at the time of switching, the switching part is always provided. It became possible to control the slag level of the slag to an arbitrary level difference from the bottom level of the switching trough 3, and it was possible to switch the slag flow at an arbitrary flow rate ratio at any time. When it is desired to flow to the switching gutter 3 side, the stopper 4 is lowered, and when it is desired to flow to the slag gutter 2 side, the stopper 4 may be raised. The lifting device for the stopper 4 is shown in FIG.
It is preferable to use a system in which the stopper 4 is moved in the vertical direction of the guide channel 8 by the drive of the elevating motor 9 by the turning beam 7 provided in the.

A stopper elevating device for changing the flow of molten slag shown in FIG. 3 will be described.

That is, in FIG. 2, the sprocket 12 is provided at the base end of the turning beam 7 supported by the column 6, and the column 6
The sprocket 13 of the turning motor 10 provided on the side is connected via the chain 11 so that the turning is possible. Further, a guide channel 8 is provided on the tip side of the turning beam 7, and the sprocket 14, 1 is provided in this guide channel.
There is provided a chain connecting the 5 and the elevating / lowering motor 9, and this chain and the elevating table 16 are connected to each other so as to be movable in the vertical direction in the figure. Here, the lift table 16 is moved up and down, that is, as a guide when moving up and down, the guide roll 1
7, 18 are attached. A fixing agent 20 for the stopper 4 is attached to the lift table, and fine adjustment in the left-right direction in the drawing is possible by the width-direction adjusting bolt 22.
Further, 21 is a heat insulating plate, which is designed to block the radiant heat from the slag here, and the fixing agent 20 and the stopper 4 are fixed by a cotter 23 or the like.

With the above-described structure, the slag level can be controlled by swirling the slag to reach the top of the slag at the time of use, and then lowering the slag to stop the slag outflow at that portion. . When not in use, it may be returned to the standby position by performing a reverse operation and prepared for the next use, and the stopper 4 may be repaired and maintained at the standby position.

[0017]

As described above in detail, according to the present invention, when the flow of the molten slag is changed in the middle of the blast furnace molten slag.
Operation of the flow changer equipped with a stopper and a weir at a part in the gutter width direction downstream of the gutter side where the slag flow switching part is flowing, and the level difference between the switching part gutter bottom and the slag surface The flow changing device is characterized by comprising an elevating mechanism for moving up and down along the guide channel and a swiveling mechanism for swiveling the elevating part of the elevating mechanism to retract it from above the molten sluice. .

In the present invention, a stopper and a weir are provided in a part in the gutter width direction downstream of the gutter side of the slag switching part where the slag is flowing, and the vertical and swiveling operations of this stopper are combined to form a slag surface. Arbitrarily control the level
It is possible to change the flow of the slag flow at an arbitrary rate repeatedly.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing a state in which the downstream side is closed by using a stopper having a width corresponding to the gutter width of the molten sluice and the level is adjusted to overflow the molten slag to the switching gutter side. is there.

FIG. 2 is a schematic plan view of one embodiment of the present invention.

FIG. 3 is a perspective view of FIG.

FIG. 4 is a side view of an apparatus for changing the flow of molten slag.

[Explanation of symbols]

 1 Slag 2 Slag 3 Switching gutter 4 Stopper 5 Weir 6 Strut 7 Swing beam 8 Guide channel 9 Lifting motor 10 Swiveling motor 11 Chain 12 Sprocket 13 Sprocket 14 Sprocket 15 Sprocket 16 Lift stand 17 Guide roll 18 Guide Roll 19 Base 20 Adhesive 21 Heat Insulation Plate 22 Bolt 23 Cotta

Claims (3)

[Claims] 1. When changing the flow of molten slag in the middle of the blast furnace molten slag, a stopper for blocking the molten slag is swung down to a position downstream of the molten slag flow switching gutter where the gutter bottom is higher than that of the molten slag. A method for changing the flow of molten slag, characterized in that the molten slag is dammed up with a slag and the level difference between the gutter bottom of the switching gutter and the surface of the slag is adjusted to cause overflow to the switching gutter side. 2. A weir provided in a part of the gutter width direction downstream of the molten gas flow switching gutter arrangement part in which the gutter bottom is higher than the gutter when changing the flow of the grit in the middle of the blast furnace gutter. The level difference between the switching gutter bottom and the slag surface is adjusted by the operation of the lifting device equipped with the stopper to adjust the flow of the slag flow by the stopper provided just before this weir and having the width of the slag channel and the width of the gutter. A method for changing the flow of molten slag, characterized by changing the flow. 3. A stopper elevating device for changing the flow of slag flow in the middle of a blast furnace molten slag, and an elevating mechanism that moves up and down along a guide channel of the elevating device, and an elevating part of the elevating mechanism is rotated. A device for changing the flow of molten slag, comprising a stopper elevating device including a swivel mechanism for retracting the molten slag from above.