JP4632518B2 - Slag crushing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a slag air crushing apparatus that crushes and collects slag discharged from an electric furnace.
[0002]
[Prior art]
Conventionally, a general method for treating slag (steel) discharged during the refining period of an electric furnace is as follows.
First, the slag taken from the electric furnace to the slag ladle is poured into the water tank from the slag ladle for cooling (steeling out) and cooled. The slag lump that has been solidified by cooling into large lump is taken out from the water tank and stored as it is, or is crushed and divided into small blocks by bulldozer etc. It is crushed in a crusher. The crushed slag blob is handed over to the secondary processor for processing.
[0003]
[Problems to be solved by the invention]
The slag treatment method as described above has the following problems.
(1) The operation of the slag ladle and the treatment of the slag when the slag is poured into the water tank and cooling it is very troublesome, and since such work is repeated for each charge, the labor and cost consumed are tremendous. It was a thing.
(2) The water vapor generated during water cooling and the water used for water cooling are contaminated. If this is done, the environment inside and outside the smelter will be contaminated, and purification will be required. It was something.
Because of these problems, there has been a demand to avoid the processing work of pouring slag into a water tank and cooling it.
[0004]
(3) When the slag lump cooled and solidified by the above operation is disposed as industrial waste as it is, the slag lump will be stored in a predetermined collection place in the smelter. This required a site, which hindered effective use of the smelter site.
(4) At the pulverization site where the slag lump is pulverized by using a bulldozer or a stone crusher, a large amount of dust and loud noise are generated during the pulverization operation, and the working environment is not good. For this reason, there is a problem that it is desired to avoid such pulverization work in the smelter.
(5) Furthermore, although a method of remelting and crushing the slag lump that has been cooled once can be adopted, wasteful energy is consumed when remelting the cooled slag lump, which increases efficiency. It was also not preferable from the viewpoint.
Because of these problems, there has been a demand for realizing a slag lump processing operation by a simpler method.
[0005]
In order to solve the above problems, an object of the present invention is to provide a slag air crushing device that can solve environmental pollution problems, improve the working environment, and reduce the volume of slag that becomes industrial waste. .
It is another object of the present invention to provide a slag crushing device that reduces the volume per piece of slag and facilitates the input to the secondary treatment.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the invention of claim 1
A duct into which molten slag is injected,
First air blowing means for blowing air to the molten slag in the duct to subdivide the slag;
Second air blowing means for blowing air to the subdivided slag to cool it;
Forming means for forming the cooled slag in the duct;
It is provided with.
[0007]
The invention of claim 2
A duct into which molten slag is injected,
First air blowing means for blowing air to the molten slag in the duct to subdivide the slag;
Second air spraying means for spraying air on the subdivided slag to cool and solidify;
Crushing means for crushing the cooled and solidified slag in the duct;
It is provided with.
[0008]
The invention of claim 3
The slag crushing apparatus according to claim 2,
The crushing means comprises a plurality of blocking bars passed into the duct,
At least one blocking bar rotates and intersects with another blocking bar to divide the slag.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, the first embodiment will be described.
FIG. 1 is an explanatory diagram showing the operating state of the first embodiment of the present invention. 1st Embodiment concerns on Claim 1 of this invention.
In FIG. 1, when the tap door 2 of the electric furnace 1 is opened, the molten slag S flows out from the inside and is injected into the duct 3 from the upper end opening 4 of the duct 3. The upper end opening 4 is formed with a narrowed portion 5 having a reduced cross-sectional area, and is adjusted so that a substantially constant amount of slag S passes therethrough. A first stage blower 6 is installed on the side surface of the duct 3 below the upper end opening 4 to blow air onto the slag S.
[0012]
The amount and pressure of the air to be blown are adjusted by the damper 7. The wind direction is preferably changed in small increments. The slag S is blown into air to form droplets, and is sent to the right as viewed from the front of FIG. Next, air is further blown into the slag S by the second stage blower 8 installed on the right side of the duct 3. By this air, the slag S is cooled and solidified, and falls downward.
[0013]
A molding or grinding roller 9 is installed in the duct 3 in the middle of dropping, and the falling slag S is molded into a predetermined shape or finely pulverized.
The example of the roller 9 shown in FIG. 1 has shown the case where the slag S is shape | molded. By adjusting the slag S to a temperature at which the slag S can be easily deformed by the rollers 9, the slag S is formed into a fixed shape by the mold formed on the rollers 9, and the slag S is collected in the lower slag ladle 11. The slag ladle 11 is mounted on a carriage 12 and can move freely. When the slag S is pulverized by the roller 9, the slag S is sufficiently cooled by the second stage blower 8 and is completely solidified.
[0014]
In the first embodiment shown in FIG. 1, the first stage blower 6 is the first air blowing means and the second stage blower 8 is the second air blowing means of the configuration according to the first aspect of the present invention. The rollers 9 correspond to the forming means. Instead of the blower, high-pressure air can be branched from a high-pressure air pipe installed in the factory. In this case, dry air is preferable.
[0015]
Next, the second embodiment will be described. FIG. 2 is an explanatory diagram showing a partial configuration of the second embodiment of the present invention. The second embodiment relates to claims 2 and 3 of the present invention. In the second embodiment, the roller 9 of the first embodiment (portion in the dashed line in FIG. 1) is replaced with crushing means (portion in the dashed line in FIG. 2) having another configuration. Air crusher.
In FIG. 2, a swivel 15 is provided in the middle of ducts 13 and 14, and the top and bottom of the swivel 15 are supported so as to be rotatable about an axis. Further, shielding bars 16 and 17 are provided near the swivel 15 of the ducts 13 and 14.
[0016]
When the ducts 13 and 14 are rotated in opposite directions by a motor or the like (not shown), if the falling slag S is longer than the interval between the shielding bars 16 and 17, the external force of twisting is caused by the shielding bars 16 and 17. In addition to the slag S, the slag S will be broken.
That is, when the slag S is formed in a rod shape and falls, the long slag S is folded to be aligned within a certain length. Moreover, this crushing means can be installed in the middle of the duct without impairing the effective sectional area inside the duct.
[0017]
In the present embodiment, the shielding rods 16 and 17 have been described as rotating in opposite directions. However, it is needless to say that the shielding rods 16 and 17 are fixed and rotated. Instead, the lower blocking bar 17 may rotate with the duct 14. Of course, the lower side may be fixed and the upper side may be rotated.
Further, although the blocking bars 16 and 17 rotate in the same direction, a predetermined effect can be exhibited even if the rotation speeds are different.
Further, in the present embodiment, the description has been given assuming that the blocking bars are a pair of upper and lower sides. However, the number of blocking bars is not limited to a pair of upper and lower sides, and may be one or three or more, for example.
These blocking bars are appropriately designed and selected, and any structure can serve as a crushing means.
[0018]
Subsequently, a reference embodiment of the present invention will be described. FIG. 3 is an explanatory diagram showing the operating state of the reference embodiment of the present invention .
In FIG. 3, when the tap door 2 of the electric furnace 1 is opened, the molten slag S flows out from the inside and flows down onto the conveyor 21. The conveyor 21 is disposed so that the front side has a downward slope, and the driving wheels of the conveyor 21 are driven to rotate in the clockwise direction when viewed from the front in FIG. 4 to convey the molten slag on the conveyor 21 downward. A cooling blower 22 is installed above the front end of the conveyor 21, and air is blown to the slag S on the conveyor 21 to be cooled and solidified.
[0019]
When the slag S cooled and solidified on the conveyor 21 is conveyed by the conveyor 21 and reaches the end of the conveyor 21, the slag S is peeled off from the conveyor 21 and broken into small pieces by the rotating hammer 23. The rotary hammer 23 corresponds to the crushing means of the present invention. The crushed slag S is collected in the lower slag ladle 11. The slag ladle 11 is mounted on a carriage 12 and can move freely.
In FIG. 3, the cooling blower 22 constitutes the air blowing means. However, instead of the blower, high-pressure air can be branched from a high-pressure air pipe installed in the factory. Again, dry air is preferred.
[0020]
Figure 4 is a diagram illustrating removed elements of the conveyor 21 of this preferred embodiment. Protrusions 25 are provided on the upper surface of the element 24 at regular intervals, and the slag S flows into the recesses 26 formed between the two protrusions 25, so that the slag S is formed as a small block without being continuous. Is done. In this case, an uneven surface is formed by the protrusion 25 and the recess 26.
Note that the uneven surface of the element 24 is not limited to the form of the protrusions 25 and the recessed portions 26 as shown in FIG. 4, and may be any shape that can be easily handled when the molten slag is cooled and solidified. Designed and selected as appropriate.
[0021]
【The invention's effect】
As described above, according to the first to third aspects of the present invention, the molten slag injected into the duct is blown into air to be subdivided, further blown into air to be cooled and solidified, and then by a roller. , Molded or crushed into small pieces. As a result, the slag can be air-crushed without cooling and solidifying and pulverizing the slag in the duct and contaminating the environment .
[Brief description of the drawings]
FIG. 1 is an explanatory view showing an operating state of the invention of claim 1;
FIG. 2 is an explanatory view showing a configuration of the invention of claim 2;
FIG. 3 is an explanatory diagram showing an operating state of a reference embodiment of the present invention .
FIG. 4 is an explanatory diagram showing a configuration of a reference embodiment of the present invention .
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Electric furnace 2 Outlet door 3 Duct 4 Upper end opening 5 Restriction part 6 1st stage blower 7 Damper 8 2nd stage blower 9 Roller 11 Ladle 12 Carriage 13, 14 Duct 15 Swivel 16, 17 Shading bar 21 Conveyor 22 Cooling blower 23 Rotating hammer 24 Element 25 Protrusion 26 Recess S Slag

Claims (3)

A duct into which molten slag is injected,
First air blowing means for blowing air to the molten slag in the duct to subdivide the slag;
Second air blowing means for blowing air to the subdivided slag to cool it;
Forming means for forming the cooled slag in the duct;
A slag air crushing device characterized by comprising: A duct into which molten slag is injected,
First air blowing means for blowing air to the molten slag in the duct to subdivide the slag;
Second air spraying means for spraying air on the subdivided slag to cool and solidify;
Crushing means for crushing the cooled and solidified slag in the duct;
A slag air crushing device characterized by comprising: The slag crushing apparatus according to claim 2,
The crushing means comprises a plurality of blocking bars passed into the duct,
A slag air crusher characterized in that at least one blocking bar rotates and intersects with another blocking bar to sever the slag.

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