JPH0545073A - Method and apparatus for processing steel residue - Google Patents

Abstract

PURPOSE:To effectually separate metal and slug in processing steel residue containing the metal and slug produced in a process where molten metal is scoured. CONSTITUTION:Steel residue in various residue discharge containers conveyed to a separation discharge field B is discharged onto a vibrating shoot (a) and slug and metal in a molten state and a semi-molten state in slug and metal in a molten state, a semi-molten state, and a solidified state in the steel residue are thrown in a coupling type metal container mold conveyor (b) processing a predetermined exfoliation property. Greater steel residue and hereby the inside of the converter steel residue is thrown into a cooling pit (f) by a deposited residue discharge installation 3 provided on a crane or by the vibration and inclination of the shoot.

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 The slag generated in the refining process of molten metal is a slag containing metal, and the properties of slag and metal in the slag are three states: molten, semi-molten and solidified. There are also various shapes. For this reason, it is difficult to separate the slag and the ingot at the time of slag.In the conventional method, these are not separated at the time of slag, and the slag is spread and discharged on the stalk, and separated and roughly divided after warming and cooling. ..

[0003] In the conventional method for treating steel slag containing metal and slag (hereinafter abbreviated as steel slag) generated in the process of refining molten metal, the work route becomes long and the solidified and hardened steel slag on the slag is generated. It greatly digs into the ground, and its developed thickness is not uniform, so that the peeling work after cooling and solidification is difficult. The peeling and removing work requires many types of heavy equipment 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, 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 processing method, the molten slag in the molten state discharged in the refining step generally contains about 10% of molten metal, and the molten metal is also discharged in a spread state at the same time. It Therefore, if the forced cooling method is adopted by introducing the cooling water pit after water sprinkling, there is a risk of carrying out solidified bullion in a deployed state and steam explosion in the pit, so the molten bullion with a large specific gravity is left in the slag pan, It is necessary to take a different treatment form after cooling and solidification, and in reality, many problems remain on the work side.

[0006]

The problem to be solved by the present invention is to solve the above problems and to separate the metal in the slag and the slag before the slag is discharged from the slag, that is, in the early stage of the treatment, and before the rough cutting. The molten slag containing the molten metal is completely discharged without the need to perform the treatment and leave the molten metal in the slag pan for another treatment. It is to provide a method and an apparatus that can be performed rapidly without any problems.

[0007]

[Means for Solving the Problems] The gist of the present invention, which has solved the above problems, is as follows: 1) Treatment of a steel slag that is discharged from a pan and conveyed, and the steel slag containing metal and slag generated in the process of refining molten metal is conveyed. In the method, various slag containers containing steel slag are conveyed to the sorting slag field, and the steel slag in the slag container is discharged onto the vibrating chute, and the molten state, semi-molten state, and solidification in the steel slag are carried out. Of the state slag / metal, the molten / semi-molten slag / metal is put into the connected metal container mold conveyor with the required peelability, and the large slag adhering to the waste container is the crane. A method for treating steel slag, which is characterized in that the slag is discharged into the cooling pit by the attached slag discharge equipment or by the vibration and inclination of the chute. 2) Steel slag containing metal and slag generated in the process of refining molten metal. Is discharged from the waste container In the apparatus for treating steel slag to be transported, a vibrating chute having an inclination to receive the steel slag in the slag container, and an adhering slag discharging equipment provided for a crane for discharging large slag adhering in the slag container,
A concatenated metal container mold conveyor that controls the transfer speed to accommodate the steel slag that has passed through the vibration type chute, a cooling pit that accommodates a large steel slag that is not accommodated by the concatenated metal container mold conveyor, and the same cooling Cooling crushing equipped with a large block crushing device that pressurizes and crushes steel slag in the pit, a tongue device that carries out the crushed metal in the cooling pit, and a deposit slag discharge device that discharges the deposit slag in the slag container An apparatus for treating steel slag, comprising a discharge device and a slag cooling equipment for cooling and solidifying the steel slag in a connected metal container mold conveyor with a controlled amount of water.

[0008]

In the present invention, various slag containers containing steel slag are conveyed to the sorting slag field, and the steel slag is thrown into the inclined vibrating chute. Molten / semi-molten slag / metal that has fallen from the chute is transferred to the connected metal container mold conveyor below and sent to the slag cooling facility at the required transfer speed. In this slag cooling equipment, slag and metal are air cooled.
Cool and solidify with steam and forced water cooling.

On the other hand, the large residue attached to the waste container is
It is discharged by an attached slag discharge equipment attached to a crane, or put into a cooling pit by a chute having vibration and inclination. The steel slag introduced by the mass crushing device in the cooling pit is pressure-crushed. Then, the crushed metal is discharged by the tongue device of the cooling and crushing discharge device or the attached slag discharge device.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment embodying the present invention will be described with reference to the drawings. In the figure, FIG. 1 is a perspective view of the same embodiment, FIG. 2 is a side view showing a vibrating chute, FIG. 3 is a front view thereof, FIG. 4 is a perspective view showing a mass crushing device of a cooling pit, and FIG. Front view, FIG. 6 is a perspective view showing a slag discharge device in a cooling pit, FIG. 7 is the same front view, FIG. 8 is a cross-sectional view showing molten slag cooling equipment, FIG. 9 is the same vertical sectional view, and FIG. 10 is a cooling pattern. FIG.

In the figure, reference numeral a is a vibration type chute, b is a connecting type metal container mold conveyor, and c is a dustproof cooling device.
c-1 is a wet dust collector, c-2 is a nozzle tip, c-3
Is a dustproof hood, d is a cooling water pit, e is an adhering sludge removing device, f is a cooling pit, and g is a rotating body g having a toothed surface on the outer periphery.
Large block crusher for crushing steel slag at -1, h is cooling pit f
Slag discharge device, i is a conveyer for conveyor, j is a slag throwing equipment, k is a slag conveyer equipment, l is a bullion conveyer equipment, m is an agglomerate box overturning device, n is an ORBOX overturning device, o is a floor Slag input equipment, p is slag transfer equipment, q is slag transfer equipment, r
Is a secondary cooling device, s is a primary magnetic separation device, t is a primary coarse crushing device, u is a raw ore temporary storage facility, v is a crushing and sieving magnetic separator, w
Is a temporary product storage facility, x is a loading and loading facility, a-1 is a vibrator of a vibration type chute a, a-2 is a protective plate, a-3 is a tilt angle variable vibration mount, and a-4 is a rail mount. Three
Is an adhering slag discharge equipment, 16 is a converter steel slag pan, K is air, M is spray, S is sprinkling, and B is a separating and slag yard.

As shown in FIG. 2, all of the steel slag carried into the steel slag treatment plant is transported to the sorting waste slag plant B by a required carrier. The steel slag in the various slag containers carried into the sorting slag field B is discharged onto the vibrating chute a, and is melted from the molten, semi-molten, and solidified slag / metal in the steel slag. The slag / metal in the state / semi-molten state is put into the connection type metal container mold conveyor b having the required peelability.

Large residues (semi-molten and solidified massive slag or large metal) deposited in the slag container such as the converter steel slag pan 16 are placed in the cooling pit f due to the vibration and inclination of the chute a. It is thrown in. Here, a semi-molten slag shoot a
Adhesion to the surface is prevented by the vibration of the chute. As for the frequency and inclination angle of the vibrating chute a described here, required values may be selected depending on the properties of the steel slag. The deposits in the converter steel slag pan 16 are removed on the vibrating chute a by the deposit remover e of the deposit discharge device 3 provided in the crane.

On the other hand, the massive slag (semi-molten / solidified state) in the steel slag charged into the cooling pit f is cooled pit f.
It is crushed by the large block crushing device g and is discharged by the in-pit slag discharging device h into the concatenated metal container mold conveyor b through the conveyor i installed at the bottom. Further, the large metal (semi-molten / solidified state) in the steel slag charged into the cooling pit f is compressed by the large block crushing device g and remains on the cooling pit f.

As described above, a series of connecting operations of these devices facilitate separation of slag and metal in the steel slag at the time of slag, which was difficult with the conventional method, and various types of conventional slags can be used. By eliminating the need for heavy equipment processing, the generation of dust is minimized,
Moreover, since it is possible to control the batch processing, it is possible to reduce the number of workers to a minimum. In addition, the large ingots recovered from the steel slag are carried out to the outside of the treatment plant by the conventional method, and are divided there to be used as an iron source.
The compressed metal remaining in the previous cooling pit f is the tongs-type large metal transfer equipment l equipped to the crane of the deposit removal device e.
Since it can be carried out and compressed again, it is possible to carry it directly to the destination of the iron source without the need to divide the bullion outside the treatment plant like the conventional method.

On the other hand, the connection type metal container mold conveyor b
The steel slag discharged therein is continuously conveyed into the dustproof cooling device c, and is forcibly cooled to 200 to 300 ° C. The cooling process in the dustproof cooling device c will be described. Figure 8,
9 is a process explanatory view of the cooling process, and FIG.
Steam cooling with mist spray water, forced water cooling with water spray
The time course of the central temperature of the steel slag in each process of air cooling is shown. First, the steel slag in the connection type metal container mold conveyor b is cooled by air or blown with air K
It is air-cooled for about 0 minutes and cooled to about 800 ° C. This solidifies the surface of the steel slag.

Next, the mist-like spray M is bathed in the steel slag in the connection type metal container mold conveyor b 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 by sprinkling water S is performed 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 concatenated metal container mold conveyor b, and the water cooling equipment having the most cooling effect is the size, layer thickness, water cooling amount, and moving speed of the metal container. Need to

Further, after the forced water cooling, it is a stage before fine crushing and 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.

[0020]

As is apparent from the above description, the method and apparatus for treating steel slag according to the present invention provides a pretreatment for separating metal and slag and roughing at the stage of slag slag removal. Since they can be separated and performed continuously, work efficiency is better than the conventional method, and centralized centralized control that does not require multiple types of heavy machinery and multiple personnel is possible, which can greatly save labor and make the work route compact. Is.

Further, since the heavy machine treatment of the 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 treated, it is possible to carry out the continuous separation treatment.

[Brief description of drawings]

FIG. 1 is a perspective view of the same embodiment.

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

FIG. 3 is a front view of a vibrating chute.

FIG. 4 is a perspective view showing a large block crushing device of a cooling pit.

FIG. 5 is a front view of the large block crushing device.

FIG. 6 is a perspective view showing a slag discharge device for a cooling pit.

FIG. 7 is a front view of the slag discharge device.

FIG. 8 is a cross-sectional view showing a slag cooling facility.

FIG. 9 is a vertical cross-sectional view of the same slag cooling equipment in the transport direction.

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

[Explanation of symbols]

 a Vibratory chute b Connectable metal container mold conveyor c Dust-proof cooling device d Cooling water pit e Debris removal device f Cooling pit g Mass crushing device h Slag discharge device in pit i Conveyor conveyor j Slag throwing equipment k laying Slag transport facility l Large bullion transport facility m Ingot BOX tumbling device n ORPBOX tumbling device o Slag throwing equipment p Slag transport facility q Slag transport facility r Secondary cooling device s Primary magnetic separation device t Primary coarse crushing device u Raw ore Temporary storage equipment v Crushing and sieving magnetic separator w Temporary storage equipment for products x Shipping equipment for loading 3 Adhesive slag discharge equipment 16 Converter steel slag pan K Air M Spray S watering B Sorting waste yard

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Michio Shigeki, 370 Sakata, Kimitsu-shi, Chiba Hamada Heavy Industries Ltd., Kimitsu Branch (72) Inventor Kenzo Ando, 370, Sakata, Kimitsu, Chiba Hamada Heavy Industries Ltd., Kimitsu Branch

Claims (2)

[Claims] 1. A method of treating a steel slag containing a metal slag containing metal and slag generated in the process of refining molten metal and transporting the slag from a pan. The molten slag in the molten slag in the molten slag in the molten slag in the molten slag, the semi-molten state, and the solidified state in the steel slag・ Injection of metal into mold conveyor of connected type metal container with required peelability, and large slag adhering to slag container is cooled by the slag discharging equipment equipped on the crane or by chute vibration / tilt. A method for treating steel slag, which is characterized in that it is put into the inside. 2. A steel slag treating apparatus for discharging and transporting a steel slag containing metal and slag generated in a process of refining molten metal from a slag container, wherein the slag container has a slope for receiving the steel slag. A vibrating chute, an adhering slag discharge facility equipped with a crane that discharges large slag adhering to the slag container, and a connection-type metal with a transport speed controlled to accommodate the steel slag that has passed through the oscillating chute. A container mold conveyor, a cooling pit that accommodates large steel slag that cannot be accommodated by the concatenated metal container mold conveyor, a large block crushing device that pressure crushes the steel slag in the cooling pit, and a crusher in the cooling pit. Cooling crushing and discharging device equipped with a tongs device for discharging the ingots and a slag discharging device for discharging the slag inside the slag container, and water for controlling the steel slag in the linked metal container mold conveyor. Processor of steel slags, characterized in that a in the water cooling and solidifying allowed to 溶滓 cooling equipment.