JPH05117736A - Method and equipment for treating steel slag - Google Patents

Abstract

PURPOSE:To provide a method and equipment for treating steel slag which continuously treats the steel slag in a lump and can safely and quickly execute with a small number of operations without any pollution. CONSTITUTION:In the method for treating the steel slag, a part of the converter slag is carried to the prescribed converter slag solidifying yard 16 and crushed, cut and cooled by a shifting type steel slag treating device 17, dust collect cooling device 19, etc., and the converter slag stuck to a removed slag vessel 28 is charged into a turn-over grizzly 21 by using a stuck removed slag discharging mechanism 12, and thereafter, collapsed and treated by a large lump collapsing mechanism 22. The molten steel slag and the molten iron pre-treated slag are charged into the turn-over grizzly 21 after passing through the dust collecting/cooling device 19 or not through this device, and the same treatment as the above is executed. The equipment for treating the steel slag has a vibrating type chute 14, the stuck slag discharging device 12, shifting type steel slag treating device 17, turn-over grizzly 21, large lump collapsing mechanism 22, dust collect cooling device 19, a conveyor 61 for carrying, etc., for executing the above treatment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating a steel slag containing a metal and slag generated in the process of refining molten metal, and a facility for treating the steel slag.

[0002]

2. Description of the Related Art A steel slag containing ingots and slag generated in the conventional refining process of molten metal (hereinafter abbreviated as steel slag).
In the processing method of, the slag component of the steel slag, which has a wide variety of shapes, and its properties are also in a molten, semi-molten, or solidified state, and the metal component are not separated when the slag is removed, and the slag component and It was developed and discharged, and after being warmed and cooled it was separated and roughly crushed for processing. However, in the above-mentioned conventional treatment method, the work route becomes long, the steel slag solidified on the slag bites deeply into the ground, and the spread thickness is not uniform, which makes removal and removal work after cooling and solidification difficult. It was The peeling and removing work requires many types of heavy machinery and a large number of personnel, and it is inevitable to secure a work route for the discharge and deployment process. In addition, a large amount of dust was generated during the work, which caused pollution problems. Further, as a method proposed for treating the steel slag, Japanese Patent Application Laid-Open No. 50-154104 or Japanese Patent Application Laid-Open No. 52-1368.
There is a processing method disclosed in Japanese Patent Publication No. 98. The treatment method is a method in which the molten slag in a molten state discharged from the refining process is discharged on a pallet over the entire area in a spread state and then forcedly cooled by sprinkling water.

[0003]

However, in the above processing method, the molten slag discharged in the refining step in the molten state usually contains about 10% of molten metal, and the molten metal is also spread at the same time. Is discharged to. Therefore, if the forced cooling method is adopted by introducing the cooling water pit after water sprinkling, there is a problem that there is a risk of carrying out the solidified ingot in a deployed state, a steam explosion in the pit, etc. There are many problems in the processing work that a large amount of labor is required to leave the molten metal with a large specific gravity in the slag pan and to take a separate processing form after cooling and solidifying. The present invention has been made in view of such circumstances, and in the early stage of processing the steel slag, the metal in the steel slag and the slag are separated and rough pre-treatment is performed, and the molten metal in the slag ladle is removed. It is possible to discharge all the molten slag containing molten metal and to process it continuously in a batch without leaving it for another process, and it can be processed safely with few workers and quickly without pollution. An object is to provide a slag treatment method and a steel slag treatment facility.

[0004]

A method according to the above-mentioned object.
The processing method of the steel slag described is that the steel slag containing the metal and slag generated in the process of refining the molten metal is discharged from the pan, put into various slag containers, and carried out to the sorting slag field for processing. Of the steel slag in the slag container, the molten or semi-molten slag, and the bare metal have the required peelability due to the vibration and inclination of the vibrating chute. A cultivating device and a slag mixed with a metal, which is put into a furnace slag solidification field, and which is spread in a pit or a yard in the converter slag solidification field to invert or stir-mix the solidified, semi-molten and molten slag mixed with the metal. Using a moving steel slag treatment device having a log device for grasping large slag or large metal sometimes generated during solidification and a cutting device for cutting the large slag and large metal, a high temperature steel slag can be removed from approximately 300 to About 50
The steel slag in the pit or yard is cooled to about 800 ° C. by crushing to 0 mm or less, and stirring and cooling while transporting the crushed steel slag together with the above crushing, and then for several minutes via a dust-proof cooling facility. Air-water cooling is performed with mist-like spray water to 800 ° C. or less, and then the product is conveyed to a secondary cooling device through an inverted grizzly,

[0005] In the converter slag, large slag adhering to the inside of the slag container is removed by using an adhering slag discharging mechanism provided on a stand or by throwing it into an inversion grizzly by vibrating and tilting a vibrating chute. Crushed by the lump crushing mechanism, the large metal in the steel slag remains on the reversing grizzly, and by the reversing operation of the reversing grizzly, it can be carried out by the large metal carrying facility that can be transported by a trailer, and the size of about 300 mm or less that has passed through the reversing grizzly Part of the slag was transported to the slag input facility and the other was transferred to the secondary cooling device, and for molten steel slag or hot metal pretreatment slag, solidified in the slag container containing the steel slag,
Cooling is performed, and in order to keep the temperature below 800 ° C, it is conveyed to a tumbling device by a conveyor, and in the process, it is put into a reversing grizzly with or without passing through a dustproof cooling facility, and the put steel slag is , The large metal in the steel slag that was crushed by the large crushing mechanism remains on the reversing grizzly, and the reversing operation of the reversing grizzly allows it to be carried out by the large metal transporting device that can be transported by a trailer.
Part of the slag below is transferred to the slag input facility, and the other is transferred to the secondary cooling device.

The steel slag treating equipment according to claim 2 is a steel slag treating equipment for discharging and transporting a steel slag containing a metal and slag generated in a process of refining a molten metal from a slag container. Regarding the processing of the converter slag, a vibrating chute having an inclination to receive the steel slag of the slag container, a slag discharge mechanism provided on a frame for discharging the large slag adhering in the slag container, and the vibration A cultivating device that conveys steel slag that has passed through a mold chute and inverts or stirs and mixes slag mixed with solidification, semi-molten and molten metal, and large slag or large metal that sometimes occurs during solidification of slag mixed with metal. A mobile steel slag processing device having a cutting device for cutting a log device for grasping the large slag and the large metal,
An inverted grizzly that stores the steel slag attached to the slag container,
Large block crushing mechanism for pressure crushing steel slag in the inversion grizzly, large metal transportation facility for carrying out crushed metal in the inversion grizzly, and deposit slag discharge for discharging deposit slag in the slag container Mechanism and air with controlled steel slag in the cooling pit,
Equipped with a dust-proof cooling facility that cools and solidifies with steam, for the treatment of molten steel slag and hot metal pretreatment slag, a reversal grizzly that receives the steel slag in the slag container and a pressure crushing of the steel slag in the reversal grizzly Large lump crushing mechanism, large metal unloading equipment to carry out crushed metal in the inversion grizzly, deposit slag discharging mechanism to discharge deposits in slag container, and slag container at required transport speed A conveyor to convey,
It is configured to have a dustproof cooling facility for cooling and solidifying the steel slag in the slag container with controlled air and steam.

[0007]

In the method for treating steel slag according to claim 1, the various slag containers containing the steel slag are conveyed to the sorting waste slag site, and the converter slag is in a molten state in the converter slag. The slag and metal in a semi-molten state are put into an inclined vibrating chute, and the vibration and tilt of the vibrating chute are put into a converter slag solidification field having a required peeling property. In the converter slag coagulation field, the converter slag is spread or solidified by expanding in a pit or yard, and the converter slag is inverted or agitated by using a plowing device of a moving steel slag processor. Mix and cool to approximately 800 ° C. Also, with the work such as inversion of the converter slag, for large slag or large metal that sometimes occurs at the time of solidification of slag mixed with metal, grasp or drop it using the log device of the mobile steel slag treatment device. The converter slag is crushed or cut into about 300 mm to about 500 mm or less by using the cutting device of the moving steel slag treatment device. Then, the cut and crushed slag and the metal are transported to the dust-proof cooling equipment while being stirred and cooled by the movable steel slag treatment device. The slag and metal introduced into the dustproof cooling equipment are steam-cooled with mist-like spray water for several minutes, cooled to 800 ° C. or less without fail, and transported to the secondary cooling device through the inverted grizzly. On the other hand, in the converter slag, large slag adhering to the inside of the slag container is discharged by the slag discharging mechanism provided on the gantry, and is thrown into the reversing grizzly by the vibration and inclination of the vibrating chute. The residue thrown into the inverted grizzly is crushed by the large block crushing mechanism, and the large metal in the steel slag remains on the inverted grizzly. Then, by the reversing operation of the reversing grizzly, it is thrown into the bullion carrier, and the bullion is carried out by the trailer. The slag having a size of about 300 mm or less that has passed through the inverted grizzly is partly transferred to the slag input facility and the other is transferred to a secondary cooling device and cooled to about 200 ° C. or less. Molten steel slag or hot metal pretreatment slag is solidified and cooled in a slag container containing steel slag, and transported to a tumbling device by a conveyor to keep the temperature below 800 ° C, and dust-proof cooling is performed in the process. It is thrown into the reversing grizzly through the equipment or not, and the thrown steel slag is crushed by the large block crushing mechanism, the metal in the slag remains on the reversing grizzly, and the reversing of the reversing grizzly By operation, it is carried out by a trailer at the bullion carrier facility. Further, a part of the slag having a size of 300 mm or less that has passed through the inverted grizzly is transferred to the slag charging equipment, and the other is transferred to the secondary cooling device, cooled to about 200 ° C., and then transferred to the processing plant.

In the steel slag treatment facility according to the second aspect of the present invention, regarding the steel slag and the converter slag that are conveyed to the sorting and slag site, the molten slag, the semi-molten slag, and the metal are , Tumble the waste container and drop it on the vibrating chute,
It is discharged to the converter slag solidification field due to its inclination and vibration, spreads in the pit or yard, and the converter slag is inverted or stirred and mixed up to about 800 ° C by using the tiller of the mobile steel slag treatment device. Cooling. Further, along with the work such as inversion of the converter slag, for large slag or large metal that sometimes occurs at the time of solidification of slag mixed with metal, grab it using the log device of the mobile steel slag processing device and drop it. Crushing and using a cutting device, about 300 mm to about 50
Crush or cut to 0 mm or less. And the cutting,
The crushed slag and metal are sent to the dust-proof cooling equipment by the moving steel slag treatment device. In the dust-proof cooling equipment, the slag and the metal are cooled with steam by mist-like spray water for several minutes, and are surely cooled to 800 ° C. or lower and solidified.
Then, if necessary, further treatment or forced cooling is performed. On the other hand, the large slag adhering to the slag waste container of the converter slag is discharged by the slag discharge mechanism attached to the gantry, or it is thrown into the reversing grizzly by the vibration and inclination of the vibration type chute to cause the lump crushing mechanism. The ground metal in the steel slag that was crushed at remains on the inverted grizzly. Then, by the reversing operation of the reversing grizzly, the reversing grizzly is thrown into the large metal carrier. Then, the bullion is carried out by a trailer. On the other hand, about 300m passing through the inverted grizzly
If necessary, the slag of m or less is subjected to desired treatment and cooling. Molten steel slag or hot metal pretreatment slag is solidified and cooled in a slag container that contains steel slag, and 80
The temperature is kept at 0 ° C. or lower and the mixture is put into an inverted grizzly. The charged steel slag is crushed by the lump crushing mechanism, the large metal in the steel slag remains on the reversing grizzly, and the reversing operation of the reversing grizzly puts it in a large metal transportation facility that can be transported by a trailer and carries it out. 30 Passing the inverted grizzly
If necessary, the slag having a size of 0 mm or less is subjected to desired treatment and cooling.

[0009]

Embodiments of the present invention will now be described with reference to the accompanying drawings to provide an understanding of the present invention. Here, FIG. 1 is a perspective view of a steel slag processing plant using a steel slag processing facility according to an embodiment of the present invention, FIG. 2 is a side view showing a vibrating chute, FIG. 3 is a front view thereof, and FIG. Is a side view showing a moving steel slag treatment device in a converter slag cooling pit, FIG. 5 is a plan view of the same, FIG. 6 is a perspective view showing a molten steel slag discharge facility, and FIG. 7 is a molten metal pretreatment slag discharge facility. Perspective view, FIG.
Is a sectional view of the dustproof cooling equipment, FIG. 9 is the same sectional view, and FIG. 10 is an explanatory view showing a cooling pattern. The steel slag treatment equipment 10 according to the embodiment of the present invention includes a converter slag discharge equipment 11 and a molten steel slag discharge equipment 12 as shown in FIG.
And a facility 13 for discharging hot metal pretreatment slag. These will be described in detail below. As shown in FIG. 1, all the slag that is carried into the steel slag processing plant is carried to the respective processing equipments 11, 12 and 13 by the required transport vehicles. First, the converter slag discharge equipment 11 is
Vibrating chute 14 and the first vibrating chute 1
The second vibrating chute 15 having the same configuration as that of No. 4 is arranged in parallel.

A converter slag solidification field 16 is installed below the first vibrating chute 14, and in the converter slag solidification field 16, a movable steel slag treatment device 1 movably arranged.
7 and a cooling pit 18 are provided, a dust-proof cooling facility 19 is provided at the center of the converter slag solidification field 16, and a slag discharge device in the converter slag pit is provided at the end of the converter slag solidification field 16. 20 are provided. A reversing grizzly 21 is provided below the slag discharging device 20, and a slag transfer facility 24a is provided below the slag discharging device 20. Adhesion slag discharging mechanism and large lump crushing mechanism are provided adjacent to the inverting shaving mechanism 21. The crushing and discharging device 22 and the large metal transportation equipment 23 are provided, and the secondary cooling device 24 is provided behind the crushing and discharging device 22. A reversing grizzly 21 is provided below the second vibrating chute 15, and a slag conveying facility 24a and a large metal transporting facility 23 are provided adjacent to the reversing grizzly 21 and are arranged in parallel to be crushed and discharged. A device 22 is provided. At the lower part of the reversal grizzly 21, one end of a slag conveying equipment 25 is provided, and the other end of the slag conveying equipment 25 is provided above the slag feeding equipment 26. In addition, 27 is a skin puncture machine, 28 is a converter steel slag pan. Regarding the processing process of the converter slag in the converter slag discharge facility 11 configured as described above, the inside of the converter slag adheres to the slag in the semi-molten state and the molten state, the case of the metal and the slag container. The processing steps of each case will be described with reference to FIGS. 1 to 10.

First, slag in a semi-molten state and a molten state,
As shown in FIG. 1, the converter slag of the metal is filled in the converter steel slag pan 28, which is one of the slag containers, and carried into the converter slag discharge facility 11. Then, using the skin crushing machine 27 provided above the converter steel slag pan 28, holes are made in the surface of the steel slag that is solidified or in the process of solidification, and a semi-molten state inside the
Molten slag and metal are made ready to flow out. Then, the converter steel slag pan 28 is turned over and the steel slag is discharged onto the first vibrating chute 14 shown in FIGS. 2 and 3. The first vibrating chute 14 is attached to the rail mount 29.
A tilt angle variable vibration mount 30 provided on the rail mount 29; a vibrator 31 provided on the tilt angle variable vibration mount 30; and a protection plate standing upright on the side of the tilt angle variable vibration mount 30. 32 is provided, and the slag in a semi-molten or molten state, which falls on the first vibrating chute 14,
The metal is prevented from adhering due to the vibration of the vibrator 31, and the metal is tumbled and put into a converter slag solidification field 16 in which a steel plate is attached to the ground having a required peeling property. It should be noted that the vibration frequency and the inclination angle of the first vibrating chute 14 are selected as required values according to the properties of the steel slag. The steel slag that has passed through the first vibrating chute 14 is processed by the movable steel slag processing device 17.

Here, the movable steel slag treating device 18 will be described. As shown in FIGS. 4 and 5, the left and right tilling device 33 for reversing or stirring and mixing the steel slag can be freely moved.
And a vertically movable log device 34 for gripping the steel slag, a vertically movable cutting device 35 for cutting the steel slag, and the tiller 3
3, a log device 34, and a cutting device 35 are rotatably mounted on the traveling device 36. The tiller 33 is
It is provided in the traveling device 36 and inverts or stirs and mixes solidified, semi-molten and molten slag of bare metal, and a tilling arm 37 and a tilling link 38 attached to the tip of the tilling arm 37. A first cylinder 39 for tilting the tilling link 38, and the tilling link 3
8 has a tilling plate 40 rotatably attached to the tip, a skid-like pawl attached to the tip, a space provided with the rear blade main body, and an angling by the first cylinder 39. Further, the cultivating plate 40 is tilted by the second cylinder 41, and the cultivating arm 37 is lifted by the third cylinder 42. The log device 34 is a large slag that is sometimes generated when the slag is solidified with a metal, and is for grasping a large metal, and a log arm 44 that is tiltably attached to the traveling device 36 by the first cylinder 43, A second cylinder 45 connected to the log arm 44, a lower log 46 attached to the tip of the log arm 44 so as to be tiltable by the second cylinder 45, and an upper log rotatably attached to the lower log 46. It has a log 47 and a third cylinder 48 attached to a lower log 46 that drives the upper log 47. The cutting device 35 cuts the solidified metal in the slag,
It is for crushing and has a lower scissors 49 attached to the log arm 44, an upper scissors 50 rotatably attached to the lower scissors 49, and a cylinder 51 for driving the upper scissors 50.

Then, in the converter slag coagulation field 16, the cultivating device 33 is driven, and the slag mixed with the solidified, semi-molten and molten metal in the cooling pit 18 is placed on the cultivating plate 40 and cultivated. The arm 37 is tilted or the first cylinder 39 is driven to rotate the tilling plate 27 in the left and right rotation directions to invert or stir and mix the steel slag to cool it. Next, the third cylinder 48 of the log device 34
Is driven to rotate the upper log 47 to grab a large lump slag or large metal that sometimes occurs at the time of solidification of slag mixed with metal, and operate the cylinder 51 of the cutting device 35 to rotate the upper scissors 50. The large slag and the base metal are cut together with the lower scissors 49 to remove the high temperature steel slag from about 300 to about 500.
Crush to less than mm. Then, as shown in FIG. 1, the crushed steel slag is inverted, stirred and mixed in the same manner as described above by using the tilling device 33 to cool the steel slag in the cooling pit 18, and thereafter, the mobile steel slag treatment device 17 is used. The traveling device 36 is driven to continuously convey the dust to the dust-proof cooling equipment 19 to further cool the steel slag. Here, as shown in FIGS. 8 and 9, the dustproof cooling equipment 19 includes a dustproof hood 52 which covers a part of the cooling pit 18, a dust collecting duct 53 provided above the dustproof hood 52, and It has a nozzle tip 54 provided below the dust collecting duct 53. The steel slag carried into the dustproof cooling equipment 19 having the above-described structure is inverted, agitated and mixed by the movable steel slag treatment device 17 to be cooled, and at the same time from the nozzle tip 54 by cooling or blower. Cooling with the air 55 for about 20 minutes, about 80
It is cooled to about 0 ° C. to solidify the surface of the steel slag. Next, a steel slag (not shown) in the cooling pit 18 is sprayed 56 from the nozzle tip 54, and a mist-like spray is bathed for about 5 minutes to perform steam cooling. As a result, the temperature of the steel slag is certainly 8
The temperature will be below 00 ° C, and the risk of steam explosion will definitely disappear.

The cooled steel slag is stored in a slag discharge device 20 as shown in FIG.
Be thrown into. Then, it is crushed by the large lump crushing mechanism of the crushing discharge device 22 of the inverted grizzly 21 and is conveyed to the secondary cooling device 24 via the slag conveying equipment 24a installed in the lower part. In the secondary cooling device 24, the crushed steel slag is cooled to about 200 ° C. by water spraying and air cooling. Further, the ingot remaining on the inverted grizzly 21 and compressed is stored in the large metal transport facility 23 by the inversion operation of the inverted grizzly 21 and then transported to the large metal storage facility 57. Here, the cooling process of the steel slag will be described with reference to the explanatory view showing the cooling pattern of FIG.
The core temperature of the steel slag in about 0 minutes is about 1300 ℃ to about 800 ℃
It is cooled rapidly to 800 ° C or less by the next 5 minutes of the steam-cooling process using mist-like spray water, and the next step is about 95% of the forced water-cooling process using sprinkling water.
The temperature is cooled to about 300 ° C. per minute, and then to about 300 ° C. to 200 ° C. for 20 minutes in the subsequent air cooling step.

Next, the treatment of large semi-molten and solidified massive slag in the slag container of the converter steel slag pan 28 or the residue having large metal bars will be described. The attached residue is a crushing and discharging device 22 provided on the frame.
The adhering debris discharging mechanism removes the debris on the second vibrating chute 15. The steel slag that is the residue on the second vibrating chute 15 is thrown into the reversing grizzly 21 due to its vibration and inclination, as in the case of the first vibrating chute 14. The semi-molten and solidified massive slag in the steel slag charged into the inverted grizzly 21 was crushed by the massive crush mechanism of the crushing discharge device 22 of the inverted grizzly 21 and passed through the inverted grizzly 21 to about 300 mm. A part of the following steel slag is discharged into the slag input equipment 26 via the slag transfer equipment 25 installed at the lower part of the inversion grizzly 21, and the other is transferred to the secondary cooling device 24 by the slag transfer equipment 24a. Be transported. In addition, the semi-molten and solidified large metal in the steel slag remaining on the inverted grizzly 21 is crushed and discharged by the crushing and discharging device 22.
The compressed bullion is compressed by the large crushing mechanism of No. 2 and is transported to the bullion storage facility 57 by the bullion transport facility 23 capable of trailer transportation by the reversing operation of the reversing grizzly 21. The bullion carried into the large bullion storage facility 57 is compressed again and directly transported to the iron source utilization destination.

As described above, the large ingots recovered from the steel slag are carried out to the outside of the treatment plant by the conventional method and divided there to be used as an iron source. The compressed metal remaining in the reversing grizzly 21 of No. 1 is carried out by the reversing operation of the reversing grizzly 21 in the trailer transportable metal bullion transport facility 23, and again compressed in the bullion transport facility 23. It does not require the division of large bullion outside such a treatment plant and enables direct transportation to the iron source user. The molten steel slag treatment will be described below with reference to FIGS. 1 and 6. First,
As shown in FIGS. 1 and 6, the facility 12 for discharging molten steel slag has an inverted grizzly 21 at the lower side of the cooling pit 18.
And a slag discharging mechanism and a large block crushing mechanism of a crushing discharging device 22 provided adjacent to the inversion grizzly 21, a bullion carrier facility 23 and a slag transport facility 24a, and molten steel rotating above the inversion grizzly 21. Slag storage container overturning device 58
And a slag transfer equipment 59 having one end provided at the lower part of the reversing grizzly 21 and a slag throwing equipment provided at the upper part of the cooling pit 18 with the other end of the slag transfer equipment 59 provided at the top. 60 is provided. Further, a conveyor 61 for transportation is arranged in the center of the cooling pit 18, and a dustproof cooling facility 19 covering the conveyor 61 for transportation is provided. Further, a plurality of molten steel slag accommodating containers 62, which are one of the slag containers, are arranged at a predetermined portion on the cooling pit 18.

The treatment of molten steel slag in the molten steel slag discharge facility 12 configured as described above will be described.
First, a molten steel slag storage container 62 containing molten steel slag
Is transported to the molten steel slag discharge facility 12 and is transported to the dustproof cooling facility 19 by the transport conveyor 61. Then, the molten steel slag in the molten steel slag storage container 62 carried into the dust-proof cooling facility 19 is stored in the molten steel slag storage container 62 in the same manner as in the case of the converter slag (see FIGS. 8 and 9). After being solidified and cooled by cooling, the molten steel slag storage container is then conveyed to the overturning device 58. Molten steel slag storage container 6 provided in the molten steel slag storage container overturning device 58
The molten steel slag 2 is inverted by the molten steel slag storage container overturning device 58, and the molten steel slag inside is poured into the inverted grizzly 21. Then, the charged molten steel slag is pressure-crushed by the adhering slag discharge mechanism and the large block crushing mechanism of the crushing discharge device 22 as in the case of the converter slag. A part of the crushed slag and the metal is sent to the slag throwing equipment 6 via the slag feeding equipment 59.
0 is discharged to the secondary cooling device 24 as the slag having a size of 300 mm or less. Further, the ingot remaining on the inverted grizzly 21 and compressed is stored in the large ingot transportation facility 23 by the inversion operation and transported to the large ingot storage facility 57. In the bullion storage facility 57, the bullion can be compressed again as in the case of the converter slag, so that it is not necessary to divide the bullion outside the treatment plant, and it can be directly transported to the iron source user destination. It is a thing.

The treatment of the hot metal preliminary slag will be described below with reference to FIGS. 1 and 7. First, as shown in FIG. 1 and FIG. 7, the facility 13 for discharging hot metal pretreatment slag has a cooling pit 1
In the lower part of the cooling pit 18, a reversing grizzly 21, a crushing discharging device 22 arranged at a predetermined distance from the reversing grizzly 21, and a hot metal pretreatment slag accommodating container provided adjacently An overturning device 63 and a slag transportation facility 24a leading to the secondary cooling device 24 are provided. Further, a conveyor 61 for transportation is arranged in the center of the cooling pit 18, and a dustproof cooling facility 19 for covering the conveyor 61 for transportation and a part of the cooling pit 18 is provided. Furthermore, cooling pit 1
A plurality of hot metal pretreatment slag storage containers 64, which is one of the slag containers, are arranged at a predetermined portion on the upper part 8. The treatment of the hot metal pretreatment slag in the hot metal pretreatment slag discharge facility 13 configured as described above will be described. First, the hot metal pretreatment slag storage container 64 in which the hot metal pretreatment slag is stored is carried into the hot metal pretreatment slag discharge facility 13 and is transported to the dustproof cooling facility 19 by the transport conveyor 61. Then, the hot metal pretreatment slag in the hot metal pretreatment slag storage container 64 carried into the dustproof cooling facility 19 is stored in the hot metal pretreatment slag storage container 64 in the same manner as in the case of the converter slag (see FIG. 8 and (Refer to FIG. 9), it is solidified and cooled by steam cooling, and then conveyed to the hot metal pretreatment slag storage container inverting device 63. The hot metal pretreatment slag storage container 64 installed in the hot metal pretreatment slag storage container inverting device 63 is charged with the internal hot metal pretreatment slag into the reversing grizzly 21 by reversing the hot metal pretreatment slag storage container inverting device 63. Then, the charged hot metal pretreatment slag is pressure-crushed by the adhering slag discharge mechanism and the large block crushing mechanism of the crushing discharge device 22 as in the case of the converter slag.

Further, the crushed slag of the hot metal pretreatment slag that has been crushed under pressure and having a thickness of approximately 300 mm or less is transported to the secondary cooling device 24 by the slag transport facility 24a, and the compression remaining on the inverted grizzly 21 that is approximately 300 mm or more. The ingots thus removed are carried out by the reversing operation of the reversing grizzly 21 by the same large metal carrier equipment 23 as that used for the molten steel slag shown in FIG. The slag of 300 mm or less conveyed to the secondary cooling device 24 is approximately 90 to
Forced cooling is performed by sprinkling water for about 100 minutes. At this stage, since the cooling rate of the slag has a great influence on the product quality, cooling is performed within a range where good quality can be secured. Further, the higher the cooling rate, the more economically advantageous the facility is, but there is a quality problem, and cooling is performed within a range in consideration of economical efficiency. Furthermore, after the forced water cooling, the steel slag is crushed to a final component with the solidified steel slag from the molten state, and before the sieving, 20
Air-cool and dry for about 1 minute. Then, at this stage, the slag temperature is cooled to 200 ° C., and fine crushing and sieving are performed in a post process. Finally, the steel slags of the converter slag, the molten steel slag, and the hot metal pretreatment slag that have passed through the secondary cooling device 24 are put into the grizzly 65 as shown in FIG. And the others are primary magnetic separation devices 67
Be transported to. In the primary magnetic separation device 67, the metal as a magnetic substance is selected from the steel slag and is conveyed to the large metal storage facility 57. Further, the remaining steel slag from which the metal has been sorted by the primary magnetic separation device 67 is conveyed to the primary coarse crushing device 68 and crushed. Further, the crushed steel slag is grizzly 65
And the above steps are repeated.

[0020]

In the steel slag treating method and the steel slag treating equipment according to claims 1 and 2, at the stage of discharging the slag,
It is possible to separate the bullion and slag and to pre-process the rough cutting continuously, and the work efficiency is better than that of the conventional method, and it is possible to perform centralized control without the need for multiple heavy equipment and multiple personnel. Therefore, it is possible to save a lot of labor and also to make the work route compact. In addition, since the heavy slag processing of steel slag is simplified, dust is extremely reduced, pollution is not generated, and the working environment is safe and favorable. Further, since all the steel slag including the molten metal can be treated, it is possible to perform the separation treatment.

[Brief description of drawings]

FIG. 1 is a perspective view of a steel slag processing plant using a steel slag processing facility according to an embodiment of the present invention.

FIG. 2 is a side view showing a vibrating chute.

FIG. 3 is a front view of the same.

FIG. 4 is a side view showing a movable steel slag treatment device in a converter slag cooling pit.

FIG. 5 is a plan view of the same.

FIG. 6 is a perspective view showing a facility for discharging molten steel slag.

FIG. 7 is a perspective view showing a facility for discharging hot metal pretreatment slag.

FIG. 8 is a sectional view of the dustproof cooling equipment.

FIG. 9 is a sectional view of the same.

FIG. 10 is an explanatory diagram showing a cooling pattern.

[Explanation of symbols]

 10 Steel slag treatment equipment 11 Converter slag discharge equipment 12 Molten steel slag discharge equipment 13 Hot metal pretreatment slag discharge equipment 14 First vibrating chute 15 Second vibrating chute 16 Converter slag solidification field 17 Mobile Steel slag treatment equipment 18 Cooling pit 19 Dust-proof cooling equipment 20 Slag discharge equipment 21 Inverted grizzly 22 Crush discharge equipment 23 Large metal transportation equipment 24 Secondary cooling equipment 24a Slag transportation equipment 25 Slag transportation equipment 26 Slag loading equipment 27 Skin breaking Drilling machine 28 Converter steel slag pan 29 Rail mount 30 Tilt angle variable vibration mount 31 Vibrator 32 Protective plate 33 Cultivator 34 Log device 35 Cutting device 36 Traveling device 37 Cultivating arm 38 Cultivating link 39 First cylinder 40 Cultivating plate 41 1st 2nd cylinder 42 3rd cylinder 43 1st cylinder 44 Arm 45 Second cylinder 46 Lower log 47 Upper log 48 Third cylinder 49 Lower scissors 50 Upper scissors 51 Cylinder 52 Dustproof hood 53 Dust collection duct 54 Nozzle tip 55 Air 56 Spray 57 Large metal storage facility 58 Molten steel slag storage container Overturned Equipment 59 Slag transfer equipment 60 Slag input equipment 61 Conveyor conveyor 62 Molten steel slag storage container 63 Hot metal pretreatment slag storage container overturning device 64 Hot metal pretreatment slag storage container 65 Grizzly 66 Loading equipment 67 Primary magnetic separation device 68 Primary rough Crusher

Front page continued (72) Inventor Yoshimi Watanabe, 370 Sakata, Kimitsu, Chiba Prefecture, Kimata Branch, Hamada Heavy Industries Ltd. (72) Inventor, Michio Shigeki, 370, Sakata, Kimitsu City, Chiba, Ltd. Inventor Hirotaka Murakami 370 Sakata, Kimitsu-shi, Chiba Hamada Heavy Industries Ltd. Kimitsu Branch

Claims (2)

[Claims] 1. A method for treating steel slag, wherein steel slag containing ingots and slag generated in the process of refining molten metal is discharged from a pan, put into various slag containers, and carried out to a sorting slag field for processing. There, in the converter slag of the steel slag in the slag container, the molten state, the slag in the semi-molten state, the metal is a converter slag solidification field with the required peelability due to the vibration and inclination of the vibration type chute. In the slag solidification field of the converter, it is expanded in a pit or a yard to solidify, invert or stir mix the slag mixed with the metal in the semi-molten and molten state, and sometimes at the time of solidification of the slag mixed with the metal. Using a moving steel slag processing device having a log device for gripping the generated large slag or large metal and a cutting device for cutting the large slag and large metal, the high temperature steel slag is reduced to approximately 300 to approximately 500 mm or less. Crush and crush the By stirring cooled while conveying the steel slag after crushing with approximately 800 ° C. The steel slags in a pit or yard
To 800 ° C. or less, and then conveyed to a secondary cooling device via a reversing grizzly to cool the converter slag. Medium, the large slag adhering to the inside of the slag container is crushed by the mass crushing mechanism by using the slag discharging mechanism provided on the frame or by throwing it into the reversing grizzly by the vibration and inclination of the vibrating chute, The large metal in the steel slag remains on the reversing grizzly, and the reversing operation of the reversing grizzly allows it to be carried out by a large metal carrying facility that can be transported by a trailer.
Part of the following slag is transferred to the slag throwing equipment, and the other is transferred to the secondary cooling device, and the molten steel slag or the hot metal pretreatment slag is solidified and cooled in the slag container containing the steel slag. , 800 ° C
In order to be the following, it is conveyed to the tumbling device by the conveyor, and in the process it is put into the reversing grizzly with or without passing through the dustproof cooling equipment, and the charged steel slag is crushed by the large block crushing mechanism. The ground metal in the steel slag that has been crushed remains on the reversing grizzly, and the reversing operation of the reversing grizzly allows it to be carried out by a large metal carrying facility that can be transported by a trailer. Also, a part of the slag less than 300 mm that has passed through the reversing grizzly is A method for treating steel slag, characterized in that the slag is transferred to a slag throwing facility and the other is transferred to a secondary cooling device. 2. A steel slag treatment facility that discharges and conveys steel slag containing ingots and slag generated in the process of refining molten metal from a slag container, and regarding the processing of converter slag, the slag container A vibrating chute having an inclination to receive a steel slag, an adhering slag discharging mechanism provided on a frame for discharging a large slag adhering in the slag container, and a solidification for conveying a slag that has passed through the vibrating chute. A cultivating device for reversing or stirring and mixing slag mixed with semi-molten and molten metal and a lump slag that sometimes occurs during solidification of slag mixed with metal or a log device for grasping the metal and the large slag and large metal A movable steel slag processing device having a cutting device for cutting the slag, an inversion grizzly containing the steel slag adhering to the waste slag container, a large block crushing mechanism for pressure crushing the steel slag in the inversion grizzly, and And the earth gold transport facilities for unloading the bullion that have been crushed in the inverted Grizzly,
Equipped with a deposit slag discharge mechanism that discharges the deposits in the slag container, and a dust-proof cooling facility that cools and solidifies the steel slag in the cooling pit with controlled air and steam to treat molten steel slag and hot metal pretreatment slag. For, regarding the reversal grizzly that receives the steel slag of the slag container, the large crushing mechanism that pressurizes and crushes the steel slag in the reversal grizzly, and the large bullion unloading that carries out the crushed metal in the reversal grizzly Equipment, slag discharge mechanism that discharges slag inside the slag container, conveyor that conveys the slag container at the required transport speed, and cool steel slag in the slag container with controlled air and steam. A facility for treating steel slag, which is equipped with a dustproof cooling facility for solidifying.