JPH08133821A - Producing method of molded material utilizing soot - Google Patents

Abstract

PURPOSE: To increase strength of a ceramic material without containing heavy metals having low melting points by heating a mixture of soots and a ceramic material in vacuum and mixing the resultant mixed valuable material, water and a ceramic material, molding and burning. CONSTITUTION: A mixture of 90-60% soots of crude oil ash or EP-ash, etc., and 10-40% a ceramic material is placed in a crucible 16 by opening an open and shut cover 15, the cover 15 is shut, a suction compressor 34 is operated and the inside of the crucible 16 is made to a vacuum state by sucking air in the crucible 16 through a suction tube 26. Next, a burner 38 is ignited to heat the crucible 16 and a treating material is decomposed by rotating a furnace main material 7 to obtain a mixed valuable material. The resultant mixed valuable material, 5-20% water and 10-30% ceramic material are supplied to a vacuum tug mill and mixed. The resultant mixture is processed by a press, etc., molded and burned.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a molded product by reusing soot dust such as crude oil ash generated and collected by burning crude oil or EP ash generated by an electric dust collector. is there.

[0002]

2. Description of the Related Art Since these soot dusts contain about 50% of carbon components, some of them are effectively used as auxiliary burning materials in the cement manufacturing process. Further, since crude oil ash contains useful metals such as nickel and vanadium, the carbon content is incinerated and removed to recover the residue. As a method for extracting heavy metals from soot dust, a plasma melting method in which temperature is raised to vitrify is generally used. Further, there is also a method which is carried out in the conventional iron and steel industry and preferentially takes out metal such as iron by putting lime or the like and firing it.

[0003]

However, these methods of vitrification require high equipment and running costs because of high temperature. In addition, even if the heavy metal is taken out, the complex compound as the residue thereof may be partially treated again as industrial waste. In addition, the conventional method of putting lime or the like into the steel industry and firing it requires large equipment and is costly. In addition, even if we try to reuse these soot dust, it can only be used as road stone because of its glass shape. Therefore, the marketability is narrow.

Therefore, the present invention is intended to solve the above-mentioned problems by providing a method for producing a ceramics molded product capable of producing a wide variety of products by taking out a heavy metal contained in soot and dust and molding it into a harmless material. Is.

[0005]

According to the invention of claim 1, soot dust such as crude oil ash or EP ash is mixed with a ceramic material and the mixture is put into a closed furnace to make the inside of the furnace a vacuum state. The furnace is heated at an appropriate temperature for several hours, then the mixed valuables in the furnace are taken out and put in a vacuum clay kneader, water and a ceramic material are added to mix them, and the finished mixture is processed by a press or the like. A method for producing a molded processed product using soot dust, which was formed into an appropriate shape, put in a kiln, and fired. Note that the above-mentioned ceramic materials include frog-eyed clay, kibushi clay, and clay materials based on this.

Further, the invention of claim 2 is such that the soot dust such as crude oil ash or EP ash and the ceramic material are 90-60: 10-40.
The mixture is mixed in the ratio of 1), put in a closed furnace, the inside of the furnace is put into a vacuum state, the furnace is heated from room temperature to about 800 degrees for several hours, and then the mixed valuables in the furnace are taken out and the vacuum soil is removed. Put in a kneader and add 5-20% water and 10-3 ceramic materials.
0% was added and mixed, and the resulting mixture was processed by a press or the like to be molded into an appropriate shape, which was put in a kiln and fired to obtain a molded product using soot and dust.

[0007]

According to the first and second aspects of the invention, soot dust such as crude oil ash and EP ash is mixed with a ceramic material, which is placed in a closed furnace, and the inside of the furnace is evacuated. By heating at an appropriate temperature for several hours, low melting point heavy metals such as zinc, cadmium and mercury are taken out, and high melting point heavy metals are taken into the material. Therefore, the mixed valuables obtained by the vacuum heating becomes pollution-free. Further, by mixing the mixed valuables with the ceramic material, various molded products having desired shapes can be manufactured.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view showing a manufacturing process of a molded product of the present invention, in which soot dust A is mixed with a ceramic material B in a vacuum heat treatment machine C under vacuum heating. Then, the mixed valuables thus generated are put into the vacuum clay kneading machine D, and the ceramic material and the water E are added to the vacuum clay kneading machine D and mixed. Then, this is taken out and subjected to a forming process F into a desired shape by pressing or the like, and firing G is performed in a kiln such as an electric furnace. As a result, a ceramic molded product is completed. Next, the vacuum heat treatment machine A used in the present invention will be described with reference to FIGS. 2 and 3. The second carriage 2 and the third carriage 3 are located on the left and right of the first carriage 1.
Is provided, one end of the rotation support body 4 is rotatably supported by the first carriage 1, and the frame body 5 is fixed to the free end of the rotation support body 4. Inside the frame body 5, a bottomed cylindrical furnace body 7 is rotatably supported by an appropriate number of roll casters 6 provided in the frame body 5. The inner circumference of the furnace body 7 is covered with refractory brick or glass fiber.

A part of the roll caster 6 is fixed to a shaft 8 which is rotatably supported by the frame body 5, and is meshed with a gear 10 provided on a drive shaft of a motor 9 which is also fixed to the frame body 5 on the shaft 8. The gear 11 is fixed. As a result, when the motor 9 is driven, the shaft 8 and the roll casters 6 rotate, and the furnace body 7 rotates.

Further, the first carriage 1 is provided with a hydraulic cylinder 12 for supporting one end of the frame body 5, and the frame body 5 is normally supported by the rotary support body 4 at an angle. When the piston is extended, the rotation support body 4 and the frame body 5 are rotated with respect to the first carriage 1. Further, a hole 13 penetrating the hollow portion of the furnace body 7 is provided at the central axis of rotation of the furnace body 7 in the frame body 5, and the rotary main shaft 14 loosely penetrates the frame body 5 from this hole 13. It projects outward.

The furnace main body 7 has an opening at an obliquely upper position in FIG. 2, and an opening / closing lid 15 for opening the opening is provided. Further, in the hollow portion of the furnace body 7, a crucible 16 formed of a material having a high thermal conductivity that generates far infrared rays, such as graphite silica or a super heat-resistant ceramic material, has an opening inside the opening of the furnace body 7. The crucible 16 is provided so as to be positioned. The outer periphery of the crucible 16 is supported by a large number of protrusions protruding from the inner periphery of the furnace body 7 at intervals, and between the outer periphery of the crucible 16 and the inner periphery of the furnace body 7. A gap 17 is provided.

As shown in FIG. 3, the opening / closing lid 15 is composed of an outside opening / closing lid 18 and an inside opening / closing lid 19, and the inside opening / closing lid 19 is swingably rotatable in a recess 20 provided inside the outside opening / closing lid 18. And is locked by a locking edge 21 provided along the periphery of the opening of the recess 20. The inner opening / closing lid 19 is capable of closing the opening of the crucible 16 and penetrates the center of the inner opening / closing lid 19 to loosely penetrate the central hole of the outer opening / closing lid 18 to fix the tubular body 22 protruding to the outside of the outer opening / closing lid 18. are doing.

Further, the outer opening / closing lid 18 is provided with a heat-resistant bearing 23 on the outer peripheral edge 18a covering the outer periphery of the opening of the furnace body 7 to compensate for the rotation of the furnace body 7 with respect to the opening / closing lid 15.
Further, the outer opening / closing lid 18 is provided with an exhaust pipe 24 that penetrates the outer opening / closing lid 18, one end thereof projects outside the outer opening / closing lid 18, and the other end communicates with the gap 17. Further, one end of an outer tubular body 25 is connected to the outer center of the outer open / close lid 18 so as to cover the tubular body 22.
The suction pipe 26 is built in the inside of the suction pipe 2.
The tip of 6 passes through the inside of the tube body 22 and projects to the inside of the inner opening / closing lid 19.

The protruding arm 27 of the second carriage 2 is provided with a main shaft joint union 28 for connecting the joint between the outer pipe body 25 and the suction pipe 26. By removing the main shaft joint union 28, the outer pipe body is removed. The second carriage 2 can be moved by removing the joint between 25 and the suction pipe 26. A cooling nitrogen gas cylinder 29 and a cooling water tank 30 are mounted on the second carriage 2.

One end of the outer pipe body 25 is connected to the cooling nitrogen gas cylinder 29. Also, this cooling water tank 30
One end of a suction pipe 26 led out from the outside pipe body 25 is introduced into the inside of the outer pipe body 25, and is connected to an underwater pump 31 in the water tank 30 to separately provide a computer 3 for controlling various operations.
It is led to the gas selection and extraction device 33 via 2. This gas selection and extraction device 33 is provided with storage tanks 33a for various gases,
33b and 33c are provided, and this gas selection and extraction device 33
A suction compressor 34 is connected to.

Further, a main shaft joint union 36 connected to the main shaft 14 is provided on the projecting arm 35 of the third carriage 3, and a gas pipe 37 connected to a joint via the main shaft joint union 36 connects the main shaft 14 to the main shaft 14. Street, hole 13
It is connected to a burner 38 provided inside. A valve 39 of a gas pipe 37 is provided on the protruding arm 35, and the gas pipe 37 is connected to a gas cylinder 40. A circulation path 41 from the compressor 34 is connected to the valve 39.

Further, an electric dust collector 42 is provided separately from these, and a residual ash collecting pipe 43 is led out from the electric dust collector 42. This opens the opening / closing lid 15 of the tip end of the residual ash collecting pipe 43 and puts it in the crucible 16 of the furnace body 7, and sucks and collects the residual ash remaining in the crucible 16. Further, an exhaust pipe 44 is connected to the exhaust stack 24,
The other end of the exhaust pipe 44 is connected to the clean filter 45. In this clean filter 45, the exhaust gas is neutralized to make it harmless and is connected to the heat reuse duct 46.

The structure of the vacuum heat treatment machine A is as described above, and the details of the method for producing a molded article of the present invention using the vacuum heat treatment machine A will be described below. First, appropriate soot dust and ceramic material are mixed with 90% soot dust and ceramic material 1
The opening / closing lid 15 is put into the open crucible 16 at a rate of 0%, and the opening / closing lid 15 is closed and sealed. Then, the suction compressor 34 is operated and the crucible 1 is suctioned by the suction pipe 26.
The air in 6 is sucked. Due to this suction, the inner opening / closing lid 19
The crucible 16 is sucked into the opening of the crucible 16 and adheres to it.
The inside becomes a vacuum state.

Then, the valve 39 is turned to send the gas from the gas cylinder 40 to the burner 38 through the gas pipe 37 to ignite the burner 38. As a result, the crucible 16 is heated. And the heat of combustion of this gas is crucible 1
The exhaust gas around the gap 17 on the outer circumference of
4 and the exhaust pipe 44, and is guided to the clean filter 45. In this way, the heating temperature is set to 400 depending on the object to be treated.
Set to ° C and heat crucible 16 for 1 hour. At this time, the motor 9 is driven to rotate the furnace body 7 with respect to the frame body 5.

By heating the crucible 16, the crucible 16 is heated.
Emits electromagnetic waves (far infrared rays) to the inside, and the object to be treated is decomposed by heating due to the ultrahigh thermal energy generated by this. The gas vaporized by this decomposition is generated in the crucible 16, which is sucked and discharged to the outside of the crucible 16 through the suction pipe 26 by the compressor 34, and is cooled while passing through the cooling water tank 30 for gas selection. It is guided to the extraction device 33, where the storage tanks 33a, 33b, 33 are classified according to various gases.
c. At this time, the gas that has not been extracted by the gas selection and extraction device 33 passes through the circulation path 41 and passes through the burner 38.
Are partially discharged by the high temperature, and the other part is discharged from the exhaust pipe 24. And the exhaust stack 24
Through the exhaust pipe 44 connected to the clean filter 4
It is converted into a harmless gas at 5 and discharged to the outside, or is reused at an appropriate place through the heat reuse duct 46.

The soot dust and the ceramic material are decomposed in the crucible 16, the low melting point heavy metals such as zinc, cadmium and mercury contained in the soot dust are removed as described above, and the high melting point heavy metals are included in the material. It is left behind and becomes ash. After the heat treatment, the opening / closing lid 15 is opened at the tip opening of the residual ash collecting pipe 43 of the electrostatic precipitator 42 to open the crucible 16 of the furnace body 7.
Then, the mixed valuables that have turned into ash in the crucible 16 are taken out. The mixed valuables taken out are used as the ceramic material 2
Mix with 0% and 10% of water in the above vacuum clay kneader D for 20 minutes.

Then, the mixed valuables are taken out from the vacuum clay kneading machine D, processed by a press or the like to be formed into an appropriate shape, put in an electric furnace and fired at about 1200 ° C. for 8 hours.
As a result, a molded article of ceramic material is completed.

Table 1 shows the results of the elution test of the ceramic molded product made by the manufacturing method of the present invention. This proves that the ceramic molded product is harmless.

[0024]

[Table 1]

Tables 2 and 3 show the results of the breaking load test and the bending strength test as shown in FIGS. 4 and 5. The bending strength of JIS A 5209 floor tile is 12.24 Kgf / cm or more. Therefore, it can be used enough as a floor tile.

[0026]

[Table 2]

[0027]

[Table 3]

Further, Table 4 shows the test results of the wear reduction, water permeability and cold resistance of the above-mentioned ceramic molded product.

[0029]

[Table 4]

In the above embodiment, the vacuum heat treatment machine A is used as a method for vacuum heating the soot dust and the ceramic material according to the present invention.
However, not limited to this processing machine, an appropriate machine, device or the like can be used.

[0031]

According to the first aspect of the present invention, first, a small amount of ceramic material is added to soot dust, and the ceramic material is placed in a closed furnace, the inside of the furnace is evacuated, and the furnace is heated. Removes low melting point heavy metals such as zinc, cadmium, and mercury, and confines high melting point heavy metals in the material,
It can be a harmless material. Then, it is possible to form various shapes by further mixing a ceramic material with these materials. Therefore, the finished ceramic molded product has the advantages that even if heavy metal remains, it is sealed in the ceramic molded product and does not come out to the outside, it is safe and the shape can be molded into a desired shape. Further, by subjecting the soot dust to a vacuum heat treatment, the steps of crushing, mixing, and firing are simplified, and the equipment cost and running cost can be suppressed lower than those of the conventional ones.

According to the invention of claim 2, the same effect as that of the invention of claim 1 is obtained, but the low melting point heavy metals can be removed more reliably, and the finished ceramic molded article can be obtained. The strength is also optimized.

[Brief description of drawings]

FIG. 1 is a schematic process drawing showing a manufacturing method of the present invention.

FIG. 2 is a schematic sectional view of a vacuum heat treatment machine used in the manufacturing method of the present invention.

FIG. 3 is a cross-sectional view of essential parts of a vacuum heat treatment machine used in the manufacturing method of the present invention.

FIG. 4 is a perspective view showing a test state of a first breaking load and a bending strength of a molded product manufactured by the manufacturing method of the present invention, in which a load is applied in the ridge direction.

FIG. 5 is a perspective view showing a test state of a second breaking load and a bending strength of a molded product manufactured by the manufacturing method of the present invention, in which a load is applied at a right angle to the ridge direction.

[Explanation of symbols]

 A soot dust B ceramic material C vacuum heat treatment machine D vacuum clay kneading machine E ceramic material + water F molding process G firing 5 frame 7 furnace body 9 motor 15 open / close lid 16 crucible 17 gap 18 outer open / close lid 19 inner open / close lid 24 discharge Cylinder 25 Outer pipe 26 Suction pipe 34 Suction compressor 37 Gas pipe 38 Burner 41 Circulation path

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical display location B28B 3/02 U B09B 3/00 302 Z 303 L (72) Inventor Yasunobu Ochiai Central Sodegaura, Chiba Prefecture Sleeve 2-1 Tokyo Electric Power Co., Inc. Inside Sodegaura Power Station

Claims (2)

[Claims] 1. A soot dust such as crude oil ash or EP ash is mixed with a small amount of a ceramic material, the mixture is placed in a closed furnace, the inside of the furnace is evacuated, and the furnace is heated at an appropriate temperature for several hours. After that, take out the mixed valuables in the furnace, put them in a vacuum clay kneader, add water and ceramic materials to mix them, and process the finished mixture with a press etc. to form it into an appropriate shape, and then kiln this A method for producing a molded product using dust particles, which comprises firing in a container. 2. A soot dust such as crude oil ash or EP ash and a ceramic material are mixed at a ratio of 90 to 60:10 to 40, and the mixture is put into a closed furnace to make a vacuum state in the furnace, The furnace is heated from room temperature to about 800 degrees for several hours, then the mixed valuables in the furnace are taken out and put into a vacuum clay kneader, and water is added to 5-2.
0% and 10 to 30% of a ceramic material are added and mixed, and the resulting mixture is processed by a press or the like to be formed into an appropriate shape, which is put into a kiln and fired. A method of manufacturing a molded product using.