JP2572323B2 - Steel slag treatment method and steel slag treatment equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Steel slag containing metal and slag generated in the process of refining a conventional molten metal (hereinafter abbreviated as steel slag).
In the treatment method, the slag and slag of steel slag, which have a variety of shapes and their properties are also molten, semi-molten, and solidified, are not separated when draining, It was developed and released, separated after heating and cooling, and roughly divided for processing. However, in the above-mentioned conventional processing method, the work route becomes long, and the steel slag solidified in the field grows into the ground greatly. Further, the developed thickness is not uniform, and it is difficult to remove and remove after cooling and solidification. Was. The separation and removal operation requires a variety 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 lot of dust was generated during the operation, causing pollution problems. Japanese Patent Application Laid-Open Nos. 50-154104 and 52-1368 disclose methods of treating steel slag.
There is a processing method disclosed in Japanese Patent Publication No. 98-98. This treatment method is a method in which a molten slag discharged from a refining process is discharged in a spread state over a whole area on a pallet and then subjected to forced cooling by spraying water.

[0003]

However, in the above-mentioned treatment system, the molten slag discharged in the refining step usually contains about 10% of molten metal, and the molten metal is also developed at the same time. Is discharged. Therefore, if the forced cooling method by introducing the cooling water pit after watering is used, there is a problem that there is a risk of unloading of the solidified metal in an expanded state and a steam explosion in the pit, and to avoid such danger, There are many problems in the processing work surface that the molten metal having a large specific gravity is left in the waste pan, and a large amount of labor is required to take another processing form after cooling and solidification. The present invention has been made in view of such circumstances, and in the initial stage of the treatment of steel slag, performs pre-treatment of the metal in the steel slag, separation of slag, and rough cracking, and melts the metal in the waste pan. Steel that discharges all of the molten slag including the molten metal without being subjected to a separate process and can be processed continuously in a lump, and can be performed safely and quickly without pollution by a small number of workers. It is an object of the present invention to provide a slag treatment method and a steel slag treatment facility.

[0004]

According to the present invention, there is provided a semiconductor device comprising:
The method for treating steel slag described in the above is a method of discharging steel slag including slag and slag generated in the process of refining molten metal from a pot, putting it into various waste containers, and carrying it out to a separate slag disposal site for processing. A slag in a molten state, a semi-molten state, and a base metal in a converter slag of a steel slag in the waste container, wherein the slag and the base metal have a required peeling property due to vibration and inclination of a vibration type chute. A tilling device and slag mixed with ingots that are put into a furnace slag solidification plant, developed in pits or yards in the converter slag solidification plant, and inverted or stirred and mixed with solidified, semi-molten and molten slag mixed with slag. A high temperature steel slag is 300 to 500 mm using a mobile steel slag processing apparatus having a log device for grasping a large slag or large metal which sometimes occurs during solidification and a cutting device for cutting the large slag and the large metal. Crushed below, The slag in the pit or yard is cooled to 800 ° C by stirring and cooling while transporting the crushed steel slag together with the crushing, and then air-water cooled with mist spray water for several minutes via dustproof cooling equipment And 8
After the temperature is reduced to 00 ° C. or lower, the conveyed material is transferred to a secondary cooling device through an inverted grizzly, and the large residue adhered to the waste container in the converter slag is discharged using an adhered residue discharge mechanism provided on a gantry or By being thrown into the inverted grizzly by the vibration and tilt of the vibration type chute, it is crushed by the massive crushing mechanism, and the ground metal in the steel slag remains on the inverted grizzly,
The reversing operation of the reversing grizzly was carried out by a large metal transporting facility capable of transporting a trailer, and the lump of 300 mm or less that passed through the reversing grizzly was partially transferred to a litter charging facility.
Others are conveyed to the secondary cooling device, solidified and cooled in molten steel slag or molten iron pretreatment slag in a waste container containing steel slag, and turned over on a conveyor to reduce the temperature to 800 ° C or less. In the process, it is thrown into the inverted grizzly with or without the dust-proof cooling equipment, and the thrown steel slag is crushed by the massive crushing mechanism, and the ground metal in the steel slag is turned into the inverted grizzly. 300m passed over the reversing grizzly and passed through the reversible grizzly by the reversing operation of the reversing grizzly
Some of the slag less than m is conveyed to the slag charging facility, and the other is conveyed to the secondary cooling device.

[0005] Further, a steel slag treatment facility according to claim 2 is characterized in that:
In a steel slag treatment facility that discharges and transports steel slag containing slag and slag generated in the process of refining molten metal from a waste container, for converter slag processing, the sludge that receives the steel slag in the waste container A vibrating chute having a slag, a slag discharging mechanism provided on a gantry for discharging large residues adhering in the slag container, and solidification, semi-melting and melting for conveying the steel slag dropped and passed through the vibrating chute A tillage device that inverts or agitates and mixes slag mixed with ingots in a state, a log device that grasps large slag or large slag that sometimes occurs when slag solidified with slag is used, and a cutting device that cuts the large slag and large slag A mobile steel slag processing apparatus having a reversible grizzly for accommodating steel slag adhering to a waste container, a massive crushing mechanism for pressurizing and crushing the steel slag in the reversible grizzly, Large bullion transport equipment for unloading crushed bullion, slag discharge mechanism for discharging slag in the slag container, dust-proof cooling for cooling and solidifying steel slag in the cooling pit with controlled air and steam Equipment, the processing of the molten steel slag and the hot metal pretreatment slag, the inverted grizzly receiving the steel slag of the waste container, a massive crushing mechanism for pressure crushing the steel slag in the inverted grizzly, Large bullion unloading equipment for unloading crushed bullion in the grizzly,
A slag discharge mechanism for discharging the slag in the slag container, a conveyor for conveying the slag container at a required conveying speed, and a dust proof for cooling and solidifying the steel slag in the slag container with controlled air and steam. A steel slag treatment facility comprising a cooling facility.

[0006]

In the method for treating steel slag according to the first aspect, the various slag containers containing the steel slag are conveyed to a separation slag site, and the converter slag is melted in the converter slag. The semi-molten slag and slag are put into a tilted vibrating chute, and are put into a converter slag solidification plant having a required peeling property by vibrating and tilting the vibrating chute. In the converter slag solidification site, the slag mixed with ingot in the pit or yard is solidified, semi-molten, and melted, and the converter slag is inverted or stirred using a tillage device of a mobile steel slag processing device. Mix and cool to 800 ° C. In addition, with the operation such as the reversal of the converter slag, large slag or large slag that sometimes occurs at the time of solidification of slag mixed with ingots is grasped or dropped using the log device of the movable steel slag processing device. Then, the converter slag is crushed or cut to 300 to 500 mm or less using a cutting device of a mobile steel slag treatment device. Then, the cut and crushed slag and slag are transported to the dustproof cooling equipment while being stirred and cooled by the mobile steel slag processing apparatus. The slag and slab carried into the dustproof cooling equipment are subjected to steam-water cooling by mist-like spray water for several minutes, are cooled to 800 ° C. or lower, and are conveyed to the secondary cooling device via the inverted grizzly.

On the other hand, the large residue adhered to the waste container in the converter slag is discharged by a discharged residue discharging mechanism provided on a gantry, and is thrown into the inverted grizzly by the vibration and inclination of the vibration type chute. The residue thrown into the inverted grizzly is crushed by the massive crushing mechanism, and the ground metal in the steel slag remains on the inverted grizzly. The inverted grizzly is fed into the bullion transporting equipment by the reversing operation, and the bullion is carried out by a trailer. In addition, the lump of 300 mm or less that has passed through the inverted grizzly is partially transported to a litter charging facility and the other is transported to a secondary cooling device and cooled to 200 ° C. or less. The molten steel slag or hot metal pre-treated slag is solidified and cooled in a waste container containing steel slag, transported to a fall-over device on a transport conveyor to reduce the temperature to 800 ° C or less, and dustproof cooled in the process. The steel slag is put into the inverted grizzly with or without the equipment, and the charged steel slag is crushed by the massive crushing mechanism, and the ground metal in the steel slag remains on the inverted grizzly, and the inverted grizzly is inverted. By operation, it is carried out by a trailer in a bullion transport facility. In addition, a part of the lump of 300 mm or less that has passed through the inverted grizzly is transported to a slag charging facility and the other is transported to a secondary cooling device, cooled to 200 ° C., and then transported to a processing plant.

[0008] In the steel slag treatment facility according to the second aspect, among the steel slag conveyed to the separation and disposal site, the converter slag includes molten slag and semi-molten slag and metal. , Falling over the waste container and dropping it on the vibrating chute,
It is discharged into the converter slag solidification field due to its inclination and vibration, and is developed in a pit or yard, and the converter slag is inverted or stirred and mixed to cool to 800 ° C. using a cultivator of a mobile steel slag processing apparatus. I do. In addition, with the operation such as the reversal of the converter slag, the large slag or large slag which is sometimes generated at the time of solidification of the slag mixed with the ingot is grasped by using the log device of the movable steel slag processing apparatus, and dropped. It is crushed and crushed or cut to 300 to 500 mm or less using a cutting device. Then, the cut and crushed slag and slag are sent to dustproof cooling equipment by a mobile steel slag processing device. In the dustproof cooling equipment, slag and metal are
Air-water cooling is performed by the mist spray water for several minutes, and it is cooled to 800 ° C. or less and solidified. Thereafter, if necessary, further processing or forced cooling is performed. On the other hand, the large residue adhering to the waste container of the converter slag is discharged by a discharged residue discharge mechanism attached to the gantry, or thrown into a reversing grizzly by vibrating and tilting of a vibrating chute to cause a large lump crushing mechanism. The ground metal in the steel slag remains on the inverted grizzly. And it is thrown into the ground metal transport equipment by the reversing operation of the reversing grizzly. Then, the bullion is carried out by a trailer. On the other hand, the slag of 300 mm or less that has passed through the inverted grizzly is subjected to desired processing and cooling as needed. The molten steel slag or molten iron pre-treatment slag is solidified and cooled in a waste container containing steel slag, and is brought to 800 ° C or less with or without dust-proof cooling equipment in the process of transport, and is subjected to inverted grizzlying. To The introduced steel slag is crushed by the massive crushing mechanism, and the ground metal in the steel slag remains on the inverted grizzly. At the same time, the slag of 300 mm or less that has passed through the inverted grizzly is subjected to a desired treatment or cooling as necessary as described above.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying 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 the steel slag processing equipment according to one embodiment of the present invention, FIG. 2 is a side view showing a vibration type chute, FIG. Is a side view showing a movable steel slag treatment device of 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 shows a molten iron pretreatment slag discharge facility. Perspective view, FIG.
9 is a sectional view of the dustproof cooling equipment, FIG. 9 is a sectional view of the same, and FIG. 10 is an explanatory view showing a cooling pattern. As shown in FIG. 1, the steel slag treatment facility 10 according to the embodiment of the present invention includes a converter slag discharge facility 11, a molten steel slag discharge facility 12,
And a hot metal pretreatment slag discharge facility 13. Hereinafter, these will be described in detail. As shown in FIG. 1, all slag carried into the steel slag processing plant is transported to respective discharge facilities 11, 12, and 13 by a required transport vehicle. First, the converter slag discharge equipment 11 is
Vibration type chute 14 and the first vibration type chute 1
A second vibration type chute 15 having the same configuration as that of No. 4 is arranged in parallel.

Below the first vibrating chute 14, a converter slag solidification field 16 is installed, and in the converter slag solidification field 16, a mobile steel slag processing apparatus 1 which is movably disposed.
7 and a cooling pit 18, a dustproof 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 lump conveying device 24a is provided below the reversing grizzly 21. An adhering sludge discharging mechanism and a large lump crushing mechanism are provided adjacent to the reversing grizzly 21. A crushing / discharging device 22 provided with a metal bullion transporting equipment 23 is provided, and a secondary cooling device 24 is provided behind the crushing / discharging device 22. A reversing grizzly 21 is provided below the second vibrating chute 15, and a slag transporting facility 24 a and a ground metal transporting facility 23 are provided adjacent to the reversing grizzly 21. An apparatus 22 is provided. One end of a slag transport facility 25 is provided below the inverted grizzly 21, and the other end of the slag transport facility 25 is provided above a slag loading facility 26. In addition, 27 is a skin piercing machine, and 28 is a converter steel slag pot. Regarding the process of converting the converter slag in the converter slag discharge equipment 11 configured as described above, the converter slag, the semi-molten and molten slag, the slag in the case of the ingot, and adhered to the waste container. The processing steps for each of the residues will be described with reference to FIGS.

First, slag in a semi-molten state and a molten state,
As shown in FIG. 1, the converter slag of metal is filled in a converter steel slag pot 28 which is one of the waste containers, and is carried into the converter slag discharge facility 11. Then, using a skin piercing machine 27 provided above the converter steel slag pot 28, holes are made in the surface of the steel slag that is solidifying or in the process of solidifying, and the slag and slag in the semi-molten state, the molten state, and the inside are removed. It is made available for outflow. After that, the steel slag pot 28 is turned over and the steel slag is discharged onto the first vibrating chute 14 shown in FIGS. 2 and 3. The first vibration type chute 14 is mounted on the rail mount 29.
A variable tilt angle vibration gantry 30 provided above the rail mount 29; a vibrator 31 provided on the variable tilt angle gantry 30; and a protection plate erected on the side of the variable tilt angle gantry 30. 32, which is a semi-molten, molten slag that falls on the first vibrating chute 14,
The slab is rolled down while being prevented from sticking by the vibration of the vibrator 31, and is poured into the converter slag solidification plant 16 having a steel plate attached to the ground having a required peeling property. The vibration frequency and the inclination angle of the first vibration type chute 14 are set to required values in accordance with the properties of the steel slag. The steel slag that has fallen and passed through the first vibrating chute 14 is processed by a mobile steel slag processing device 17.

Here, the movable steel slag treatment apparatus 17 will be described. As shown in FIGS. 4 and 5, a tilling apparatus 33 that can move left and right and up and down freely to reverse or stir and mix steel slag.
A vertically movable log device 34 for gripping steel slag, a vertically movable cutting device 35 for cutting steel slag, and a traveling device that rotatably mounts the tilling device 33, the log device 34, and the cutting device 35 for traveling. 36. The tilling device 33 is provided in the traveling device 36, for solidifying, semi-molten, and inversion or agitating and mixing the slag of the metal ingot in a molten state,
A tilling arm 37, a tilling link 38 attached to the tip of the tilling arm 37, a first cylinder 39 for tilting the tilling link 38, and a tip mounted on the tip of the tilling link 38 so as to be rotatable. And a tilling plate 40 which is provided with a space from the blade main body at the rear and which is angled by the first cylinder 39. The tilling plate 40 is tilted by a second cylinder 41, and the tilling arm 37 is lifted by a third cylinder 42. The log device 34 is for grasping large slag or large slag which is sometimes generated at the time of solidification of slag mixed with metal.
A log arm 44 tiltably attached to the traveling device 36 by a motor, a second cylinder 45 connected to the log arm 44, and a lower log tiltably attached to the tip of the log arm 44 by the second cylinder 45. 4
6 and an upper log 4 rotatably attached to the lower log 46.
7 and a third cylinder 48 for driving the lower log 46 for driving the upper log 47. The cutting device 35 includes:
It cuts and crushes the solidified metal in the slag,
A lower scissors 49 attached to the log arm 44 and an upper scissors 50 rotatably attached to the lower scissors 49.
And a cylinder 51 for driving the upper scissors 50.

In the converter slag solidification field 16, the tilling apparatus 33 is driven to put the solidified, semi-molten and molten metal-mixed slag developed in the cooling pit 18 on the tilling plate 40, and the tilling is performed. The arm 37 is tilted or the first cylinder 39 is driven to rotate the tillage plate 40 in the left and right rotation directions, thereby inverting or mixing the steel slag and cooling it. Next, the third cylinder 48 of the log device 34 is driven to rotate the upper log 47, and the large slag or large ingot which sometimes occurs when the slag solidified with the ingot is grasped,
The cylinder 51 of the cutting device 35 is operated to rotate the upper scissors 50 to cut the large slag and the ground metal together with the lower scissors 49 to crush the high-temperature steel slag to 300 to 500 mm or less. Then, as shown in FIG. 1, the crushed steel slag is inverted and stirred and mixed in the same manner as described above 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 be continuously conveyed into the dustproof cooling equipment 19 to further promote the cooling of the steel slag. Here, as shown in FIGS. 8 and 9, the dustproof cooling equipment 19 includes a dustproof hood 52 covering a part of the cooling pit 18, and a dust collecting duct 5 provided above the dustproof hood 52.
3 and a nozzle tip 5 provided below the dust collection duct 53.
4 Dustproof cooling equipment 1 having the above configuration
The slag carried into the slag 9 is transferred to the mobile slag treatment device 17.
The mixture is cooled by being inverted, agitated, mixed, and cooled by air.
Is used for about 20 minutes, and is cooled to about 800 ° C. to solidify the surface of the steel slag. Next, a mist spray 56 in which steel slag (not shown) in the cooling pit 18 is sprayed from the nozzle tip 54 is bathed for about 5 minutes to perform air-water cooling. As a result, the temperature of the steel slag will surely be 800 ° C. or less, and the danger of steam explosion will surely be eliminated.

The cooled steel slag is stored in a slag discharger 20 as shown in FIG.
It is thrown into. Then, it is crushed by the large crushing mechanism of the crushing and discharging device 22 of the inverted grizzly 21, and is transferred to the secondary cooling device 24 via the slag transfer equipment 24 a installed at the lower part. In the secondary cooling device 24, the crushed steel slag is cooled to 200 ° C. by watering and air cooling. The compressed metal remaining on the inverted grizzly 21 is stored in the large metal transporting equipment 23 by the inverting operation of the inverted grizzly 21, and then transported to the large metal storage equipment 57.
Here, the cooling process of the steel slag will be described with reference to the explanatory diagram showing the cooling pattern of FIG. 10. The central temperature of the steel slag is rapidly cooled from about 1300 ° C. to about 800 ° C. in 20 minutes of the stirring and tilling cooling step. In the next 5 minutes of the air-water cooling step using the mist spray 56, the water is surely cooled to 800 ° C. or less, and about 95% of the next step of the forced water cooling step by water spraying.
It is cooled to about 300 ° C. per minute, and then cooled from about 300 ° C. to 200 ° C. for 20 minutes in the subsequent air cooling step.

Next, the treatment of large semi-molten and solidified large slag or large metal slag adhering to the waste container of the converter steel slag pot 28 will be described.
The adhering residue in 8 is discharged on the second vibrating chute 15 by the adhering residue discharging mechanism of the crushing and discharging device 22 provided on the gantry. The steel slag which is a residue on the second vibration type chute 15 is thrown into the reversing grizzly 21 due to its vibration and inclination as in the case of the first vibration type chute 14. The semi-molten and solidified large slag in the steel slag charged into the inverted grizzly 21 is turned into the inverted grizzly 2
A part of the steel slag of 300 mm or less that has been crushed by the large lump crushing mechanism of the crushing and discharging device 22 and passed through the inverted grizzly 21 is laid through the slag transfer equipment 25 installed below the inverted grizzly 21. The others are discharged into the slag charging facility 26, and the others are transported to the secondary cooling device 24 by the slag transport facility 24a. In addition, the semi-molten, solidified ground metal in the steel slag remaining on the inverted grizzly 21 is compressed by the massive crushing mechanism of the crushing and discharging device 22, and the compressed metal is inverted by the inverting operation of the inverted grizzly 21. The bullion is transported to the bullion storage facility 57 by the bullion transport facility 23 capable of trailer transportation. The bullion carried into the large bullion storage facility 57 is compressed again and transported directly to the iron source destination.

As described above, the large ingot recovered from the steel slag is carried out of the treatment plant according to the conventional method, and is divided there and used as an iron source. The compressed sliver remaining in the inverted grizzly 21 is transported out by the inverted sliver grizzly 21 at the large bullion transporting equipment 23 capable of transporting a trailer, and is compressed again at the large bullion transporting equipment 23. It is possible to transport the bullion directly to the destination where the iron source is used without the need to separate the bullion outside the treatment plant. Hereinafter, the molten steel slag treatment will be described with reference to FIGS. 1 and 6. First,
As shown in FIGS. 1 and 6, the molten steel slag discharge facility 12 has an inverted grizzly 21 below the cooling pit 18.
And a slag discharge mechanism and a massive lump crushing mechanism of a crushing and discharging device 22 provided adjacent to the inverted grizzly 21, a bullion transporting equipment 23 and a slag transporting equipment 24 a, and molten steel rotating above the inverted grizzly 21. Slag storage container tipping device 58
A slag transporting facility 59 having one end provided at the lower portion of the inverted grizzly 21; and a slag loading facility provided with the other end of the slag transporting facility 59 provided at the upper portion and arranged above the cooling pit 18. 60 are provided. In addition, a conveyor 61 is provided at the center of the cooling pit 18, and a dustproof cooling device 19 covering the conveyor 61 is provided. Further, a plurality of molten steel slag storage containers 62 which are one of the waste containers are arranged at a predetermined portion on the cooling pit 18.

The processing of molten steel slag in the molten steel slag discharge facility 12 configured as described above will be described.
First, the molten steel slag storage container 62 in which the molten steel slag is stored.
Is carried into the molten steel slag discharge facility 12 and 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 dustproof cooling equipment 19 is subjected to steam and water 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 cooled and solidified, it is conveyed to the molten steel slag storage container overturning device 58. The molten steel slag storage container 6 provided in the molten steel slag storage container overturning device 58
2 is inverted by the molten steel slag storage container overturning device 58, and the molten steel slag inside is introduced into the inverted grizzly 21. Then, the charged molten steel slag is crushed under pressure by the slag discharge mechanism and the large crushing mechanism of the crushing and discharging device 22 as in the case of the converter slag. The crushed slag and a part of the slag are transferred to the slag charging facility 6 via the slag transport facility 59.
The waste is discharged to 0, and the others are conveyed to the secondary cooling device 24 by the slag conveying equipment 24a as slag of 300 mm or less. The compressed metal remaining on the reversing grizzly 21 is stored in the large bullion transporting equipment 23 by the reversing operation and transported to the large bullion storage equipment 57. In the bullion storage equipment 57, the bullion is compressed again as in the case of the converter slag, so that it is not necessary to cut the bullion outside the treatment plant, and it is possible to directly transport the bullion to the iron source destination. Things.

Hereinafter, the processing of the hot metal preliminary slag will be described with reference to FIGS. First, the hot metal pretreatment slag discharge facility 13 is provided with a cooling pit 1 as shown in FIGS.
8, a reversing grizzly 21, a crushing discharge device 22 disposed at a predetermined distance from the reversing grizzly 21, and a hot metal pretreatment slag storage container provided adjacent to the cooling pit 18. The apparatus is provided with a tipping device 63 and a slag transfer facility 24 a communicating with the secondary cooling device 24. A transport conveyor 61 is provided at the center of the cooling pit 18, and is provided with dustproof cooling equipment 19 covering a part of the transport conveyor 61 and the cooling pit 18. Furthermore, cooling pit 1
A plurality of hot metal pre-treatment slag storage containers 64, which are one of the waste containers, are arranged in a predetermined portion on the top 8. The processing 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 equipment 19 is the same as the case of the converter slag in the hot metal pretreatment slag storage container 64 (FIG. 8 and FIG. 9), solidifies and cools by steam cooling, and is then conveyed to the hot metal pretreatment slag storage container overturning device 63. In the hot metal pretreatment slag storage container 64 installed in the hot metal pretreatment slag storage container overturning device 63, the internal hot metal pretreatment slag inside the hot metal pretreatment slag storage container overturning device 63 is charged into the inverted grizzly 21. Then, the charged molten iron pre-treatment slag is pressure-crushed by the slag discharge mechanism and the massive crushing mechanism of the crushing and discharging device 22 in the same manner as the converter slag.

Further, the slag of 300 mm or less in the hot metal pre-processed slag crushed under pressure is transported to the secondary cooling device 24 by the slag transport equipment 24a, and is compressed on the inverted grizzly 21 of 300 mm or more. The bullion is carried out by the reversing operation of the reversing grizzly 21 and is carried out by the bullion carrying equipment 23 similar to that used for the molten steel slag shown in FIG. The secondary cooling device 2
The lump of 300 mm or less conveyed to 4 is subjected to forced cooling by sprinkling water for about 90 to 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 in which good quality can be ensured. The higher the cooling rate is, the more economically advantageous the equipment is, but there is also a quality problem, and the cooling is performed in a range in which economic efficiency is considered. Further, after the forced water cooling, air cooling and drying are performed for about 20 minutes using a blower or the like as a step before fine crushing and sieving for making the steel slag solidified from a molten state as a final component. Then, at this stage, the slag temperature is cooled to 200 ° C., and fine crushing and sieving are performed in a subsequent step. Finally, the converter slag passed through the secondary cooling device 24,
As shown in FIG. 1, the steel slag of the molten steel slag and the molten iron pretreatment slag are put into a grizzly bowl 65, a part of the slag is carried to a stowage shipping facility 66, and the other is carried to a primary magnetic separation device 67. In the primary magnetic separation device 67, metal as magnetically-coated material is sorted out of the steel slag and transferred to the large metal storage facility 57. Further, the remaining steel slag from which the metal is sorted in the primary magnetic separation device 67 is transported to the primary coarse crushing device 68 and crushed. Further, the crushed steel slag is transported to the grizzly 65, and the above steps are repeated.

[0020]

According to the method for treating steel slag and the equipment for processing steel slag according to the first and second aspects of the present invention, in the step of discharging the steel slag,
It is possible to continuously separate and separate pre-processing of ingots and slag, and to perform pre-treatment of rough cracking. It has higher work efficiency than conventional methods, and enables centralized control that does not require multiple types of heavy machinery and a large number of personnel. There is a great deal of labor saving and a compact work path. In addition, since the heavy equipment treatment of the steel slag is simplified, dust is reduced to a minimum and no pollution occurs, and the working environment is safe and favorable. Furthermore, since all the steel slag including the molten metal can be processed, the separation processing can be performed.

[Brief description of the drawings]

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

FIG. 2 is a side view showing a vibration type chute.

FIG. 3 is a front view of the same.

FIG. 4 is a side view showing a movable steel slag treatment apparatus for 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 discharge facility for 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]

Reference Signs List 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 vibratory chute 15 second vibratory chute 16 converter slag solidification plant 17 mobile Steel slag treatment equipment 18 Cooling pit 19 Dustproof cooling equipment 20 Slag discharge equipment 21 Inverted grizzly 22 Crush discharge equipment 23 Large bullion transport equipment 24 Secondary cooling equipment 24a Lump slag transport equipment 25 Slag transport equipment 26 Litter loading equipment 27 Drilling machine 28 Converter steel slag pan 29 Rail mount 30 Variable tilt angle vibration base 31 Vibrator 32 Protection plate 33 Tilling device 34 Log device 35 Cutting device 36 Traveling device 37 Tilling arm 38 Tilling link 39 First cylinder 40 Tilling plate 41 No. 2nd cylinder 42 3rd cylinder 43 1st cylinder 44 b Arm 45 Second cylinder 46 Lower log 47 Upper log 48 Third cylinder 49 Lower scissors 50 Upper scissors 51 Cylinder 52 Dust-proof hood 53 Dust collection duct 54 Nozzle tip 55 Air 56 Mist spray 57 Large metal storage facility 58 Molten steel slag storage Container overturning device 59 Litter transfer equipment 60 Litter charging equipment 61 Conveyor conveyor 62 Liquid steel slag storage container 63 Hot metal pretreatment slag storage container overturning device 64 Hot metal pretreatment slag storage container 65 Grizzly 66 Stowage shipping equipment 67 Primary magnetic separation device 68 Primary coarse crusher

 ──────────────────────────────────────────────────の Continuing on the front page (72) Yoshimi Watanabe, 370 Sakata, Kimita-shi, Chiba Pref. Inside the branch (72) Inventor Hirogo Murakami 370 Sakata, Kimitsu-shi, Chiba Prefecture Inside the Kimitsu branch of Hamada Heavy Industries, Ltd. (56) References JP-A-3-202406 (JP, A) JP-A-53-149893 (JP, A) JP-A-5-45072 (JP, A) JP-A-51-54168 (JP, A) JP-A-51-82422 (JP, A)

Claims (2)

(57) [Claims] 1. A method for treating steel slag in which steel slag including slag and slag generated in the process of refining molten metal is discharged from a pot, placed in various waste containers, and carried out to a separate waste disposal site for treatment. In the converter slag of the steel slag in the slag container, a slag and a slag in a molten state, a semi-molten state, and a base metal are provided with a converter slag solidification field having a required peeling property due to the vibration and inclination of the vibration type chute. At the time of slag solidification with tilling equipment that inverts or stirs and mixes slag mixed with metal in the pits or yards in the converter slag solidification field to be solidified, semi-molten and molten. High-temperature steel slag is crushed to 300 to 500 mm or less using a log device that grasps the generated massive slag or bullion and a mobile steel slag processing device that has a cutting device that cuts the large slag and bullion. Together with the crushing The slag in the pit or yard is cooled down to 800 ° C by stirring and cooling while transporting the crushed steel slag, and then steam-water cooled with mist spray water for several minutes via dustproof cooling equipment. , 800 ° C. or less, and then conveyed to a secondary cooling device through an inverted grizzly, and in the converter slag, large residues adhered to the waste container are attached to a pedestal using an adhered residue discharge mechanism or The vibrating chute is crushed by the large lump crushing mechanism by being thrown into the reversing grizzly due to the vibration and inclination of the vibrating chute, the ground metal in the steel slag remains on the reversing grizzly, and the ground that can be transported by a trailer by the reversing operation of the reversing grizzly. The slag of 300 mm or less that has been carried out by the gold transport facility and passed through the inverted grizzly is partially transported to the slag charging facility and the other is transported to the secondary cooling device. Bei processing slag solidification C. in Haikasu vessel containing steel slags for, carried cooled and transported to tipping apparatus by the transport conveyor in order to 800 ° C. or less,
In the process, it is thrown into the inverted grizzly with or without dust-proof cooling equipment, and the thrown steel slag is crushed by the massive crushing mechanism, and the ground metal in the steel slag remains on the inverted grizzly, By the reversing operation of the reversing grizzly, it is carried out by a large metal transporting facility capable of transporting a trailer, and a part of the lump of 300 mm or less passing through the reversing grizzly is transported to a litter charging facility and the other is transported to a secondary cooling device. A method for treating steel slag, comprising: 2. A steel slag treatment facility for discharging steel slag including slag and slag generated in the process of refining molten metal from a waste container, and transporting the steel slag. A vibrating chute having a slope for receiving the steel slag, an attached slag discharging mechanism provided on a gantry for discharging large residues adhered to the waste container, and a solidification for conveying the slag dropped and passed through the vibrating chute. , A tillage device for inverting or stirring and mixing slag mixed with ingots in semi-molten and molten state, a log device for grasping large slag or large slag which sometimes occurs when slag solidified with slag, and the large slag and large slag A mobile slag treatment device having a cutting device for cutting steel slag, an inverted grizzly for accommodating the steel slag adhered to the waste container, a massive crushing mechanism for pressure-crushing the steel slag in the inverted grizzly, Large bullion transport equipment for unloading crushed metal in the grizzly, slag discharging mechanism for discharging slag in the slag container, and cooling and solidifying steel slag in the cooling pit with controlled air and steam A dust proof cooling system for the slag, and for processing the molten steel slag and the hot metal pre-treatment slag, an inverted grizzly receiving the steel slag of the waste container, and a massive crushing mechanism for pressurizing and crushing the steel slag in the inverted grizzly. A large bullion unloading facility for unloading crushed bullion in the inverted grizzly, an adhesive slag discharging mechanism for discharging the adhesive slag in the waste container, and a conveyor for transporting the waste container at a required transport speed, Dust-proof cooling equipment for cooling and solidifying steel slag in a waste container with controlled air and steam.