JPH09137923A - Solidification processor for melted matter by waste melting furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To separate granulated stag from granulated metal in melted matters from a waste melting furnace by a method wherein melted matters are granulated and solidified, the granulated and solidified matters are crushed to be selected magnetically and the granulated slag is crushed after the magnetic selection thereof. SOLUTION: Melted matters obtained by a melting treatment of wastes with a waste melting furnace 1 is fed into a granulating tank 4 of a granulating/solidifying device 3, quenched to be granulated and solidified and is fed into the subsequent coarsely crushing device 10. Large slag and large foreign matters such as cut matters of an auxiliary electrode wrapping metal contained granulated and solidified matters are crushed by the coarsely crushed device 10 to separate the metal and slag. The metal and the stag are both fed into a magnetic separator 20. The magnetic separator 20 ejects the non-magnetic granulated slag S by a centrifugal force from an outer circumferential surface of a drum 23 rotating at a high speed from the solidified matters supplied onto the outer circumferential surface of the drum 23 and the magnetic granulated metal M alone is attracted onto the outer circumferential surface of the drum 23 by a magnetic force of a permanent magnet 24 to be raked off by a scraper 25 thereby separating the granulated metal M and the granulated slug S.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for solidifying a melt obtained by melting a waste in a waste melting furnace.

[0002]

2. Description of the Related Art A melt obtained by melting incineration ash of municipal waste, sewage sludge, industrial waste, etc. in a waste melting furnace is disclosed in, for example, Japanese Patent Laid-Open No. 62-172107. In the device, put it in a water granulation tank to water granulate and solidify,
The obtained granulated solidified product is carried out by a scraping conveyor, and solidified fine granules composed of a magnetic metal component (hereinafter referred to as granulated metal) and solidified fine granules composed of an inorganic component (hereinafter referred to as granulated slag) by a magnetic separator. Granulated metal is reused for balance weights of heavy machinery, and granulated slag is reused for civil engineering materials and construction materials.

By the way, in the above solidification processing apparatus,
Large water granulated slag that solidifies in the form of surrounding water granulated metal during water granulation and solidification in a water granulation tank.Granular slag is difficult to separate and sort with a magnetic separator, and is usually classified as granulated slag. If granulated metal is mixed in and the magnetic separation power of the magnetic separator is sufficiently large, the above-mentioned large slag will be mixed in the separated material classified as granulated metal. If the separation of particles is uncertain, for example, when water granulated slag is used for asphalt aggregates or fine aggregates for concrete, foreign matter may cause the asphalt or concrete to become unfamiliar and cause surface peeling. Become.

Further, since the water granulated slag contains a large amount of needle-like materials having a pointed shape with irregular sizes and shapes, it is generally put into a crusher such as a cage mill for crushing treatment. Often the metal itself is a big metal, and this metal often breaks the ceramic pin of a crusher such as a cage mill or a pin mill. Furthermore, from the waste melting furnace, in addition to the melt, for example, cutouts of the auxiliary electrode at the outlet may be discharged, and sometimes the diameter is 50 to 75 mm and the length is 30 cm. There are large ones, which enter the crusher without being magnetically selected and block the entrance of the crusher, which interrupts the slag treatment process, and the size of the electrode which does not block the entrance is May destroy ceramic pins.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and reliably separates the solidified material of the melt discharged from the waste melting furnace into granulated slag and granulated metal. It is an object of the present invention to provide a melt solidification processing device that can be used.

Another object of the present invention is to provide a melt solidification processing device which can prevent a clogging accident and a damage accident in a crusher for crushing water granulated slag.

[0007]

According to a first aspect of the present invention, there is provided a solidification apparatus for a molten material in a waste melting furnace, which is disposed below a slag opening of the waste melting furnace and is discharged from the slag opening. The granulation and solidification device that granulates and solidifies the melt that has been formed, the granulation and crusher that is connected to the granulation and solidification product discharge port of this granulation and solidification device and that crushes the granulation and solidification product, and the crushed product discharge port of this granulation machine. It is characterized by comprising a magnetic separator for magnetically separating the crushed material, and a crusher connected to the water slag discharge port of the magnetic separator for crushing the water slag.

Further, the solidification treatment apparatus for the melt by the waste melting furnace of the second invention of this application is arranged below the slag opening of the waste melting furnace to remove the melt discharged from the slag opening. A water crushing and solidifying device for water crushing and solidifying, and a crusher connected to the water crushing and solidifying product discharge port of the water crushing and solidifying device for crushing the water crushed and solidified product,
A magnetic separator connected to the crushed material discharge port of this coarse crusher for magnetic separation of crushed material, a sieve connected to the granulated slag discharge port of this magnetic separator and a sieve for sieving the granulated slag, and connected to the sieve bottom discharge port of this sieve. And a crusher for crushing the granulated slag under the sieve.

In the present invention, the coarse crusher is for crushing a large-sized water granulated slag containing a water granulated metal to decompose it into a water granulated metal and a water granulated slag, and for roughly crushing large-sized electrode rod fragments. Therefore, various crushers such as a jaw crusher, a hammer crusher, and a roll crusher can be used.

Further, in the present invention, the crusher is for reducing the diameter of the granulated slag and controlling the particle size, and various crushers such as a cage mill, a pin mill and a vibration mill can be used.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A specific example of the first invention will be described below with reference to FIG. A water crushing and solidifying device 3 is disposed below the outlet port 2 of the waste melting furnace 1 of the submerged arc furnace type. The water granulation / solidification device 3 includes a water granulation tank 4 and a water supply system (not shown) for supplying cooling water and circulating water to the water granulation tank.
And a scraper conveyor 5 having a scraping plate arranged in the water granulation tank 4 and running along the bottom surface of the tank.

Below the granulated solidified product discharge port 6 from which the granulated solidified product scraped by the scraper conveyor 5 is discharged,
A coarse crusher 10 composed of a roll crusher is arranged with the receiving port facing the discharge port 6.

Below the crushed material discharge port 11 of the crusher 10, a rotary drum type magnetic separator 20 is arranged with the upper surface of the vibrating feeder 21 facing the discharge port 11. The magnetic separator 20 includes a casing 22 and a vibrating feeder 21.
A drum 23 rotatably supported on the downstream side of the vibrating feeder, a cylindrical permanent magnet 24 mounted inside the drum, and an outer peripheral surface of the drum 23 at an end portion in the rotation direction of the drum 23. And a scraper 25 supported so as to be in sliding contact with each other. And, below the water granulated metal discharge port 26 in the lower part of the casing 22 whose lower part is bifurcated, a receiver 27 for accommodating the magnetically selected water granulated metal M is installed, and below the water granulated slag discharge port 28. Is provided with a hopper 29, and the hopper 29 is a crusher which is a cage mill 3
It is connected to the 0 shoot 31.

The cage mill 30 has a rotor 33 having a large number of pins 32 arranged in parallel on a double concentric circle, and a large number of pins 34 arranged in parallel on a double concentric circle having a smaller diameter than the rotor 33. The rotor 33 and the rotor 35 that is driven to rotate in the opposite direction are housed in a casing 36, and the outlet of the chute 31 is opened to the inner diameter portion of the rotor 35. Below the discharge port 37 at the lower end of the casing 36, a receiver 38 that accommodates the slag particles P that have been crushed and sized is installed.

In the melt solidification processing device 40 having the above-mentioned configuration, the melt obtained by melting the waste in the waste melting furnace 1 overflows the slag port 2 and the water of the water granulation and solidification device 3 is discharged. It is put into the crushing tank 4 and rapidly cooled to be solidified by water crushing, conveyed inside the water crushing tank 4 by the scraper conveyor 5, and charged into the crusher 10 from the water crushed solidified product discharge port 6.

In the coarse crusher 10, large slag containing metal contained in the water-solidified product and large cuts of auxiliary electrodes (not shown) at the outlet 2 of the waste melting furnace 1 are removed. -Shaped foreign matter is crushed to separate the metal and slag, and the cut-off material is downsized to, for example, about 10 mm or less, and from the crushed material discharge port 11 together with other fine-grained water-crushed slag and water-crushed metal. It is put into the magnetic separator 20.

In the magnetic separator 20, the vibration feeder 21
The non-magnetic granulated slag S in the solidified material supplied to the outer peripheral surface of the drum 23 by the drum 23 rotates at a relatively high speed.
The magnetically crushed metal M and the crushed slag S ( (Including electrode fragments). The separated granulated metal M is collected in the receiver 27, and the granulated slag S passes through the hopper 29 and the chute 31 of the cage mill 30.
Supplied within.

In the cage mill 30, the water granulation slag S supplied to the inner diameter side of the rotor 35 is ground by the rotors 35 and 33 which rotate in opposite directions at a high speed, and contains a large amount of needle-like substances having sharp tips. The slag S becomes slag particles P having a particle size distribution suitable for the intended use without the needle-shaped material, and is collected from the discharge port 37 into the receiver 38.

As described above, since the large slag containing metal is crushed by the crusher 10 and decomposed into metal and slag, the metal can be separated from the slag in the magnetic separator 20 following the crusher 10. A granulated solidified product containing a large slag containing a can be reliably separated into a granulated slag and a granulated metal. Further, since the coarse crusher 10 reduces the size of the large foreign matter such as the cut pieces of the electrode by crushing, the large foreign matter can be prevented from entering the crusher (the cage mill 30) through the magnetic separator 20.

Next, a specific example of the second invention will be described with reference to FIG. In the figure, the same parts as those in FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted. This melt solidification processing device 45 differs from the melt solidification processing device 40 of FIG. 1 only in that a sieve 50 is interposed between the magnetic separator 20 and the cage mill 30.

The screen 50 comprises a vibrating screener, and the receiving port 51 is open toward the granulated slag discharge port 28 of the magnetic separator 20. Casing 5 vibrated by vibration exciter 52
The opening size of the sieving net 54 stretched in the No. 3 is set to be about several mm smaller than the gap size (pin clearance) between the pin 32 and the pin 34 which are adjacent in the rotor diameter direction of the cage mill 30. Then, below the discharge port 55 above the sieve of the casing 53, a receiver 5 for accommodating the granulated slag S having a large diameter.
6 is installed, and the bottom sieve outlet 57 is installed in the cage mill 30.
It opens toward the hopper 29 connected to.

In the melt solidification processing device 45 having the above-mentioned structure, the metal and slag are separated by the crushing of the large slag containing the metal by the crusher 10 and the electrode is damaged as in the embodiment of the first invention. A small foreign matter such as an object is crushed to reduce its size, and the granulated slag S (including electrode fragments) separated from the granulated metal M having magnetism by the magnetic separator 20 is put into the sieve 50.

After the sieving operation in the sieve 50, the granulated slag S and the electrode fragments having a diameter larger than the opening size of the sieve mesh 54, which has not been sufficiently reduced in size by the coarse crusher 10, are separated on the sieve. The small-sized water granulated slag S under the sieve and the small pieces of the electrode collected in the receiver 56 are put into the cage mill 30 through the lower sieve outlet 57 and crushed to have a uniform size and shape without needles. The slag particles P are collected in the receiver 38.

Thus, the coarse crusher 10 according to the first aspect of the invention.
In addition to the crushing action by means of the crushing action by the sieving process, by the sieving action of the sieve 50 of the granulated slag S after the magnetic separation, only the granulated slag having a predetermined particle size or less is fed into the cage mill 30, so that the cage mill for large-sized slag and electrode fragments It is possible to reliably prevent the accidental damage to the pins 32 and 34 due to the invasion of the pin 30, and the accidental obstruction inside the chute 31 and the rotor.

The present invention is not limited to the above specific examples. For example, a waste melting furnace, a device for scraping solidified material from a water granulation tank, a crusher, a magnetic separator, a sieve, etc. are not limited to those described above. Alternatively, the cage mill 30 may be replaced with another type of crusher.

[0026]

As described above, according to the first aspect of the present invention, the large slag containing the metal can be separated into the metal and the slag by the coarse crusher, so that the granulated solidified product is converted into the granulated slag by the subsequent magnetic separator. Can be reliably separated into granulated metal.
Moreover, since large foreign matter such as electrode cutouts is reduced in size by the coarse crusher, it is possible to prevent large foreign matter from entering the crusher as it is and causing an accident of blockage or damage to the crusher.

According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, the sieving arranged in the preceding stage of the crusher prevents the intrusion of large-diameter slag or electrode fragments into the crusher. As a result, it is possible to reliably prevent the accident of blockage of the crusher and the damage of the ceramic pin of the crusher due to the intrusion into the crusher.

[Brief description of the drawings]

FIG. 1 is an equipment system diagram (longitudinal sectional view) of a melt solidification processing apparatus showing a specific example of the first invention.

FIG. 2 is an equipment system diagram (longitudinal sectional view) of a melt solidification processing apparatus showing a specific example of the second invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Waste melting furnace, 2 ... Slag port, 3 ... Granulating and solidifying device, 4
... granulation tank, 5 ... scraper conveyor, 6 ... granulated solidified product discharge port, 10 ... crusher, 11 ... crushed material discharge port, 20 ... magnetic separator, 26 ... granulated metal discharge port, 27 ... receiver, 28 ... Granulated slag discharge port, 29 ... Hopper, 30 ... Cage mill, 33
... Rotor, 35 ... Rotor, 36 ... Casing, 37 ... Discharge port, 38 ... Receptor, 40 ... Molten solidification processing device, 45 ...
Melt solidification processing device, 50 ... sieve, 54 ... sieve mesh,
55 ... sieve upper discharge port, 56 ... receiver, 57 ... sieve lower discharge port.

Claims (2)

[Claims] 1. A water granulation and solidification device, which is disposed below a slag port of a waste melting furnace and hydro-solidifies the melt discharged from the slag port, and a water granulated solidified product of the water granulation and solidification device. A coarse crusher connected to the discharge port to crush the granulated solidified product, a crusher connected to the crushed product discharge port of this crusher to magnetically separate the crushed product, and a granulated slag discharge port of this magnetic separator A solidification treatment device for a melt by a waste melting furnace, comprising: a crusher for crushing slag. 2. A water granulation and solidification apparatus which is disposed below a slag opening of a waste melting furnace and which granulates and solidifies the melt discharged from the slag opening, and a water granulated solidification product of the water granulation and solidification apparatus. A coarse crusher connected to the discharge port to crush the granulated solidified product, a crusher connected to the crushed product discharge port of this crusher to magnetically separate the crushed product, and a granulated slag discharge port of this magnetic separator An apparatus for solidifying a melt by a waste melting furnace, comprising: a sieve for sieving slag; and a crusher connected to an outlet under the sieve of the sieve for crushing the water granulated slag under the sieve.