JPH0545072A - Method and apparatus for processing steel residue - Google Patents

Abstract

PURPOSE:To effectually process steel residue in a solidified state from a molten state where slug and metal are mixed. CONSTITUTION:Semi-molten steel residue discharged from a converter furnace steel residue pan 11 or a steel residue box is received by a converter furnace steel residue pan receiving device 2-1 including a rotary/reversal mechanism 2-14 rotated and reversed around a shaft 2-11, and is cooled to 800 deg.C only in the first place with air. Then, the steel residue is cooled to 800 deg.C or lower through air cooling, and thereafter the converter furnace steel residue pan receiving device 2-1 including the rotary/reversal mechanism 2-14 is moved and the steel residue is reversed and dropped on a large-sized reversal grizzly 10-2, 300-1000mm or greater large-sized metal is separated and recovered, and thereafter 300-1000mm or smaller steel residue is forcedly cooled with water pouring.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Steel slag generated in the refining process of molten metal is
It is a steel slag containing metal, and the properties of the slag and metal in the steel slag are in three states: molten, semi-molten, and solidified, and there are various shapes. For this reason, it is difficult to separate the slag and the ingot at the time of slag, so in the conventional method, they are not separated at the time of slag, but they are spread and discharged on the stalks, and a means for separating and rough splitting after warming and cooling is taken. There is.

In the conventional method for treating a steel slag containing metal and slag (hereinafter abbreviated as steel slag) generated in the process of refining molten metal, the work route becomes longer and the steel slag solidified and hardened on the slag is However, it does not cut into the ground greatly, and the thickness of its deployment is not uniform, so it is difficult to perform the peeling work after cooling and solidification. Therefore, various heavy machinery and a large number of personnel are required, and it is inevitable to secure a work route for the discharge deployment process. Moreover, a large amount of dust was generated during the work, which caused a pollution problem.

Further, in the processing method disclosed in Japanese Patent Laid-Open No. 50-154104 or Japanese Patent Laid-Open No. 52-136898, the molten slag in a molten state discharged from the refining process is spread on the pallet over the entire area. This is a method of performing forced cooling by sprinkling water after discharge. However, in this method, the molten slag in the molten state discharged in the refining process has 1
Generally, it contains about 0% of molten metal, and the molten metal is also discharged in a spread state at the same time.

Therefore, if the forced cooling method is adopted by introducing the cooling water pit after sprinkling water, there is a risk of carrying out the solidified bullion in a deployed state and steam explosion in the pit, and the molten bullion having a large specific gravity is stored in the slag pan. It is necessary to take a different treatment form after the cooling and solidification that was left in step 2, and in fact, many problems remain in the work side.

[0006]

The problem to be solved by the present invention is to solve the above problems, and to separate the ingots and slag in the steel slag and pre-process the rough cracking at the initial stage of the treatment of the slag. , Leaving the molten metal in the slag pan without performing another process,
It is intended to provide a method and a device which can discharge all molten slag containing molten metal and continuously process it all at once, and can perform it safely with a small number of workers and quickly without pollution.

[0007]

Means for Solving the Problems The gist of the present invention, which has solved the above problems, is as follows: 1) A steel slag containing metal and slag generated in the process of refining molten metal, which is discharged from a slag container and conveyed. In the treatment method of No. 3, the semi-molten steel slag discharged from the steel slag pan or the slag BOX is received by a slag device equipped with a rotation reversing mechanism around a shaft, and the steel slag stored in the slag device is first air-cooled. It is cooled to 800 ° C only by itself, then steam-cooled with mist-like spray water to 800 ° C or below, and then the slag device equipped with a rotation reversing mechanism is moved to invert the steel slag on a large grizzly. A method for treating a steel slag, which is characterized by dropping and then collecting and collecting a large ingot of 300 to 1000 mm or more, and then forcibly cooling a steel slag of 300 to 1000 mm or less by sprinkling 2) generated in the process of refining molten metal Bullion and slur A steel slag treating device that discharges and conveys steel slag containing slag from a slag container, equipped with a converter steel slag ladle receiving device, a slag removing and rough crushing device with a pot, and a vibrating chute. Converter steel slag ladle slag equipment and other steel slag processing B
BOX slag tipping and discharging equipment equipped with OX tipping device and large-scale reversing grizzly, primary cooling equipment for cooling large slag diameter steel slag to 800 ° C or less, and lump crushing inverting discharge for crushing to 300 to 1000 m / m or less Steel slag treatment device, which is equipped with a slag facility and a secondary cooling system composed of a forced water cooling device. 3) A slender steel slag container is rotated and inverted in a slender trolley with a partially opened bottom surface. The slag device is characterized in that it is rotatably supported by a mechanism.

[0008]

According to the present invention, a steel slag ladle or a steel slag B is used in a method for treating a steel slag containing a metal slag generated in a process of refining molten metal and discharging and transporting the slag from a slag container.
The semi-molten steel slag discharged from the OX is received by a slag device equipped with a rotation reversing mechanism around a shaft, and first, the steel slag contained in the slag device is cooled to 800 ° C only with air, and then It is cooled to 800 ° C or less by steam cooling with mist-like spray water, and then the slag device equipped with a rotation reversing mechanism is moved and the steel slag is inverted and dropped on a large grizzly, 300 to 1000 mm.
It is a method for treating a steel slag, which comprises forcibly cooling a steel slag of 300 to 1000 mm or less by sprinkling water after separating and collecting the above large metal.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention will be described with reference to the attached drawings. In the figure, FIG. 1 is a plan view showing the apparatus of this embodiment, FIG. 2 is a perspective view showing a converter steel slag ladle slag facility, FIG. 3 is a perspective view showing a large block crushing and slag facility, and FIG. 4 is a BOX. FIG. 5 is a perspective view showing the slag tipping and discharging equipment, FIG. 5 is an explanatory view showing the inside of the primary cooling equipment, and FIG. 6 is a steel slag in each process of air cooling / steam cooling with mist-like spray water and forced water cooling / air cooling with sprinkling. It is explanatory drawing which shows the time passage of the central temperature of. FIG. 7 is a perspective view showing the primary cooling equipment, and FIG. 8 is a sectional view showing the inside of the primary cooling equipment.

Each facility / apparatus will be described below. Reference numeral 1 is a skin puncturing device, which is a device for crushing the solidified skin of the converter slag contained in the converter steel slag pan 15 by remote or automatic operation. As a crushing mechanism, it is preferable that the tip has a hard one made of iron or the like, and an arbitrary place is selected to operate up and down to crush.

Reference numeral 2 is a converter steel slag ladle slag removal equipment, which comprises a converter steel slag ladle receiving device 2-1 and a pot slag removing and rough crushing device 2-
2 and a vibration chute 2-3. Further, the pot adhering slag removing and crushing device 2-2 removes and crushes the converter slag adhering to the inside of the pot even if the converter steel slag pot 15 is tilted and is not discharged to the outside of the pot. Is. And, an arm 2 that allows the inside of the converter steel slag pan 15 to be arbitrarily moved by remote control.
21 and a crushing tool 2-22 for removing and crushing the converter slag attached to the pot. The crushing tool 2-22 is made of a hard material such as iron, and is equipped with a mechanism that vibrates back and forth when contacting in order to improve the peeling property of the attached slag together with the 360 ° turning of the tip, and the inside of the converter steel slag pan receiving device 2-1. It also serves as a mechanism for crushing large blocks.

The vibrating chute 2-3 receives the slag, metal, etc. discharged from the converter steel slag pan 15 by the converter steel slag pan receiving device 2-.
1, and as shown in FIG. 2, it is arranged to be inclined between the converter steel slag pan 15 and the converter steel slag pan slag device 2-1. In addition, the converter steel slag is a vibrating chute 2-
3 has a mechanism that vibrates vertically with respect to the inclination of the vibrating chute 2-3 so that it does not stay inside. The converter steel slag pan slag device 2-1 corresponds to the slag device of the present invention, and is provided with a semi-cylindrical steel slag container 2-17, in which the converter steel slag pan 1 is placed.
The steel slag and the metal in 5 are received via the vibration chute 2-3.

The motor 2-15 is operated when almost all the steel slag and metal in the converter steel slag pan 15 are received, and the gear 2-16 is operated.
, The rotation reversing mechanism 2-14 is actuated to tilt the steel slag container 2-17 by 180 ° via the shaft 2-11, and the steel slag in the converter steel slag pan receiving device 2-1 is moved. Metals and the like are remotely and automatically discharged through the bottom opening 2-12 of the truck. A trolley 2-13 is attached for moving from the slag position to the discharge position, and has a remote and automatic operation mechanism. The converter steel slag pan receiving device 2 with the molten / semi-molten or solidified steel slag / metal in the steel slag container 2-17 of the converter steel slag lapping device 2-1. It moves along the rail 3 for slag conveyance with the trolley 2-13 attached to -1.

Converter steel slag pan receiver 2-1 and trolley 2-1
3 is a track changing device 4-1 such as a turntable system
To the primary cooling equipment 5 via. Primary cooling equipment 5
Is composed of a primary cooling device 5-2 having pipes capable of cooling with a plurality of cooling media in the primary cooling building 5-1. The molten / semi-molten or solidified steel slag / metal in the converter steel slag pan slag device 2-1 is melted / semi-molten steel slag by the cooling medium ejected from the primary cooling device 5-2. It has a mechanism to control and cool the metal to a solidified state. The molten or semi-molten steel slag / metal is generally cooled by gas or water until it solidifies.

After the primary cooling, the converter steel slag ladle receiving device 2-1 and the trolley 2-13 are moved to the large block crushing reverse slag facility 6 via the rail changing device 4-1. Large crushing inversion slag equipment 6
Is composed of a large block crushing device 6-1, a large grizzly 6-2, a metal carrier truck 6-3, and a slag carrier truck 6-4. The large crushing device 6-1 is for crushing a large lump of solidified steel slag, steel mixed with metal in the converter steel slag pan slag device 2-1 by remote control. -11. Crushing tool 6-12. The arm 6-11 and the crushing tool 6-12 have the same mechanism as the arm 2-21 and the crushing tool 2-22.

Converter steel slag pan receiving device 2-1 steel slag container 2-
Numeral 17 rotates 180 ° via a shaft 2-11 to discharge the solidified steel slag / metal slag / metal mixed with the metal crushed by the large crusher 6-1. Converter steel slag pan receiving device 2-
The solidified steel slag / metal mixed steel slag / metal discharged from No. 1 is separated from the large mass through the large grizzly 6-2 having a mesh of 300 to 1000 mm. The more the metal is mixed,
Generally, large meshes tend to become large lumps, but 700-800 mm mesh is more efficient and practical in terms of workability, metal collection, slag product size, etc. as the mesh of the large grizzly 6-2. ..

Large slag steel slag / metal that does not pass through the large grizzly 6-2 enters the bullion carrier 6-3, and small slag steel slag / metal that passes through the large grizzly 6-2 downward is a lump. Enter the slag carrier 6-6. Large slag and slag that do not pass through the large-scale grizzly 6-2 enter the bullion carrier 6-3, and move to the bullion sorting and discharging device 8 along the installed slag transport rail 3. The massive steel slag, metal, etc. in the metal carrier truck 6-3 that has moved to the metal selection / transportation device 8 are tilted and discharged, and then loaded onto a large pallet vehicle by a magnet or tongs method and then outside the system. It is processed.

The small slag steel slag / metal that has passed downward through the large-scale grizzly 6-2 enters the slag transport carriage 6-4 and moves to the secondary cooling facility 7. The secondary cooling equipment 7 includes a secondary cooling dome 7-1 having a three-dimensional structure with the slag transport rail 3 and a secondary cooling device 7-2 having a plurality of cooling water pipes in the secondary cooling dome 7-1. Become. The solidified small slag steel slag / metal in the slag transport carriage 6-4 is moved into the secondary cooling dome 7-1 along the slag transport rail 3 and ejected from the secondary cooling device 7-2. It is forcibly cooled by a cooling medium. In addition, it has a mechanism that can control the ejection amount and ejection time of the cooling medium according to the loading amount, temperature, type, etc. of the steel slag. Cooling in the solidified steel slag is generally water cooling, and is performed in a sprayed or water-filled state.

The solidified and cooled solidified slag / metal in the slag carrier 6-4 is moved to the primary magnetic separation facility 12 along the slag transportation track 3 and is separated by the magnet to be the primary metal. It is roughly crushed by the coarse crusher 13-1 and moved to the plant processing facility 14. Reference numeral 10 is a BOX slag overturning discharge facility, which is a facility for remotely sloping and discharging the molten / semi-molten steel slag / metals, etc. received in the BOX type container and separating it from the large block when passing through the sieve mesh. Is. Generally, hydraulic pressure is utilized as the tilt discharge mechanism of the BOX, and grizzly is used for large mass separation.

The BOX tumbling device 10-1 is composed of a BOX mounting base 10-21 and a driving device 10-22 which tilts together with a steel slag receiving slag BOX 10-23. The BOX mounting base 10-21 has a mechanism that prevents the BOX from dropping when tilted by a plurality of trunnion shafts attached to the steel slag receiving slag BOX 10-23.

The large-scale inverted grizzly 10-2 also has a function of coarsely crushing the solidified steel slag / metal, etc., which is tilted and discharged from the steel slag receiving slag BOX 10-23, by utilizing the impact by dropping, and the converter The passing amount into the steel slag ladle receiving device 2-1 is increased. Larger sizes than the mesh of the large inverted grizzly 10-2 will slide down to the large metal carrier 6-5, but the grizzly rotating shaft 10-2 will be removed in order to remove the lumps clogged between the meshes.
4 has a reversing discharge mechanism. The rotational force is generally hydraulic or electric motor. Also, large inverted grizzly 10-2
Is installed between the BOX tumbling device 10-1 and the large metal carrier 6-5, and is installed so as to be inclined to increase the moving force of the steel slag. The large metal carrier truck 6-5 is moved to the large block crushing / reversing discharge facility 6 along the slag transportation rail, and is transferred to the bullion carrier truck 6-3 by tilting discharge. The function is similar to the converter steel slag pan receiver 2-1.

Next, the step of cooling the steel slag will be described.
In the cooling process of the steel slag, the steel slag in the container is air-cooled for about 20 minutes with air by cooling or a blower to 800 ° C.
Cool to about C. This solidifies the surface of the steel slag. Next, the mist-like spray is bathed in the steel slag in the slag device for about 5 minutes. This ensures that the steel slag is kept at 800 ° C or below and the risk of steam explosion is eliminated.

After that, forced water cooling is performed 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 where good quality can be secured. Further, the higher the cooling rate, the more economically advantageous for the equipment, but there is a quality problem, and it is necessary to perform cooling within a range that is considered economical.
For example, the layer thickness of the melt is determined by the size and shape of the slag device, and it is necessary to use water cooling equipment that has the most cooling effect based on the size, layer thickness, water cooling amount, and moving speed of the slag device. There is.

Further, after the forced water cooling, it is a stage before fine crushing / sieving so that the steel slag solidified from the molten state becomes the final component. 20 at this stage with a blower
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 carried out in a later step.

In the figure, 4 is a slag transportation route changing facility,
Reference numeral 9 is a slag charging equipment for converter steel slag ladle, 10 is a BOX slag tumbling discharging equipment, 11 is a dump slag discharging equipment, 13 is a primary coarse crushing equipment, 1-1 is a remote automatic piercing device, and 9-1 is a laying equipment. A slag conveying device, 9-2 is a slag slicing and throwing device, 11-1 is a dump slag discharging road, and 12-1 is a primary magnetic separator.

[0026]

As is clear from the above description, the method and apparatus for treating steel slag according to the present invention performs the pretreatment of the separation of the metal and slag and the rough cracking at the stage of the slag slag removal. Since it can be performed continuously, work efficiency is better than the conventional method, and it is possible to perform centralized centralized control that does not require multiple types of heavy equipment and multiple personnel.
A great deal of labor can be saved and the work route can be made compact. Also, since heavy equipment processing of steel slag is eliminated,
The dust is extremely reduced and the working environment is improved. Further, since all the steel slag including the molten metal can be processed, continuous processing is possible.

[Brief description of drawings]

FIG. 1 is a plan view showing an entire apparatus according to an embodiment.

FIG. 2 is a perspective view showing a converter steel slag ladle slag facility.

FIG. 3 is a perspective view showing a large block crushing reversal slag facility.

FIG. 4 is a perspective view showing a BOX slag overturning discharge facility.

FIG. 5 is an explanatory diagram showing the inside of the primary cooling equipment.

FIG. 6 is an explanatory diagram showing a temperature change in a cooling process.

FIG. 7 is a perspective view showing a primary cooling facility.

FIG. 8 is a cross-sectional view showing the inside of the primary cooling equipment.

[Explanation of symbols]

 1 Skin blasting equipment 2 Converter steel slag ladle slag equipment 3 Rails for slag transportation 4 Equipment for changing slag transportation route 5 Primary cooling equipment 6 Large block shredding inversion waste equipment 7 Secondary cooling equipment 8 Metal bullion sorting and unloading equipment 9 Transfer Slag slag charging equipment for furnace steel slag 10 BOX slag tumbling discharge equipment 11 dump slag discharge equipment 12 primary magnetic separation equipment 13 primary coarse crushing equipment 14 plant processing equipment 15 converter furnace steel slag pan 1-1 remote automatic piercing device 2-1 tumbling Furnace steel slag ladle receiving device 2-2 Ladle slag removing and coarse crushing device 2-3 Vibration chute 2-11 Shaft 2-12 Bottom opening 2-13 Cart 2-14 Rotation reversing mechanism 2-15 Motor 2-16 Gear 2-17 Steel slag container 2-21 Arm 2-22 Crushing tool 4-1 Track changing device 5-1 Primary cooling building 5-2 Primary cooling device 6-1 Large block crushing device 6-2 Large grizzly 6-3 Ingot Transport trolley 6-4 Slag carrier 6-5 Large metal carrier 6-11 Arm 6-12 Crushing tool 7-1 Secondary cooling dome 7-2 Secondary cooling device 9-1 Slag carrier device 9-2 Slag cutting and feeding device 10 -1 BOX overturning device 10-2 Large size reversing grizzly 10-21 BOX mounting stand 10-22 Drive device 10-23 Steel slag receiving box BOX 10-24 Grizzly rotating shaft 11-1 Dump slag discharging climbing road 12-1 Primary magnetic selection Machine 13-1 Primary coarse crusher

Front Page Continuation (72) Inventor Michio Shigeki, 370 Sakata, Kimitsu, Chiba, Chiba Prefecture, within Kimitsu Branch, Hamada Heavy Industries Ltd. (72) Inventor, Kenzo Ando, 370, Sakata, Kimitsu, Chiba Prefecture, within Kimitsu Branch, Hamada Heavy Industries

Claims (3)

[Claims] 1. A method for treating a steel slag containing a metal slag generated in a process of refining a molten metal, the metal slag being discharged from a slag container and conveyed, and a half of the slag discharged from a steel slag pan or a steel slag BOX. The molten steel slag is received by a slag device equipped with a rotation reversal mechanism around a shaft, first the steel slag contained in the slag device is cooled to 800 ° C only with air, and then with mist-like spray water. 800 ° with steam cooling
C or less, then move the slag device equipped with a rotation reversing mechanism to reverse and drop the steel slag on a large grizzly,
After collecting and collecting large metal of 0 to 1000 mm or more, 300
A method for treating a steel slag, which comprises forcibly cooling a steel slag having a size of 1000 mm or less by sprinkling water. 2. A steel slag treating apparatus for discharging and transporting a steel slag containing a metal and slag generated in a process of refining molten metal from a slag container, and a converter steel slag ladle for processing the converter steel slag. Converter furnace steel slag ladle slag equipment equipped with slag equipment, slag removal and rough crushing equipment with a pan, and vibrating chute, and BOX tumbling equipment for handling other steel slag and BOX slag tumbling equipment equipped with large-scale reversing grizzly Primary cooling equipment for cooling large slag diameter steel slag to 800 ° C or below,
An apparatus for treating steel slag, comprising a large block crushing reversal slag facility for crushing to 300 to 1000 m / m or less, and a secondary cooling facility composed of a forced water cooling device. 3. A slag receiving device, characterized in that an elongated steel slag container is rotatably supported by a rotation inverting mechanism in an elongated trolley having a partially opened bottom surface.