JP3535334B2 - Method for producing burned material from incinerated ash of industrial waste and general waste - 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 for producing a burned material from incinerated ash of industrial waste and general waste.

[0002]

2. Description of the Related Art Conventionally, industrial waste and general waste are treated by the following three methods.

Industrial waste and general waste are converted into 600 to 8
A method of incineration at a temperature of about 50 ° C and discarding the incinerated ash at the final disposal site for processing.

Industrial waste and general waste are converted into 600 to 8
A method in which it is incinerated at a temperature of about 50 ° C, and the incinerated ash is solidified by adding a hardening material such as cement and water and aggregate to form a secondary product such as a block.

Industrial waste and general waste are converted into 600 to 8
A method of incinerating at a temperature of about 50 ° C. and converting the incinerated ash to molten slag at a higher temperature of about 1300 to 1800 ° C. The molten slag is used as an aggregate for cement concrete, an interblocking material that is crushed and molded and then re-fired, or added to a clay for ceramics as a glass component for ceramics.

[0006]

However, in the above-mentioned conventional method, the following problems still remain.

That is, in the method (1), heavy metals and halogenated organic substances contained in the incineration ash remain in the state of metals, oxides and chlorides, so that heavy metals are affected by rainwater and groundwater for a long period of time. And halogenated organics elute in water.

The elution of such heavy metals and halogenated organic substances has a great influence on plants and animals in the natural world.
This may cause environmental damage that adversely affects the human body, and may cause a serious social problem.

Moreover, with the spread of the mass-consumption lifestyle in recent years, the amount of waste discharged tends to increase year by year.
Under these circumstances, the allowable number of years for final disposal sites owned by each local government is said to be about eight years. On the other hand, the construction of a new final disposal site by the local government has been slow to proceed due to problems such as selection / acquisition of the disposal site and compensation for the area.

In the method of (1), since heavy metals and halogenated organic substances contained in the incineration ash remain in the cement concrete in the form of metals, oxides and chlorides, the method of cement concrete by rainwater or groundwater Water absorption
Due to the water permeation phenomenon, heavy metals and halogenated organic substances may elute outside the cement concrete, which may also cause environmental damage.

In the method (1), heavy metals and halogenated organic substances contained in the incinerated ash are solid-soluted in the slag phase containing silicic acid as a main component, so that heavy metals and halogenated substances are affected by rainwater and groundwater. Organic substances, etc. will not elute in water. However, the apparatus for reburning incinerated ash to produce molten slag is expensive, at about 100 million yen per ton of incinerated ash,
Further, since the running cost is about 10,000 yen per ton of incinerated ash, it is difficult for local governments having financial difficulties to construct a treatment device.

An object of the present invention is to provide a method for producing a burned material using incineration ash of industrial waste and general waste, which can solve the above-mentioned problems. At least one of the incineration ash,
A slurry obtained by mixing water, quartz as aggregate, and a hardening material made of alumina cement, or incineration ash of at least one of industrial waste and general waste is mixed with volcanic deposits. A slurry obtained by mixing water, quartz as an aggregate, and a hardener made of alumina cement into the mixture is put into a mold to be solidified and molded, and then the molded product is 1200 to 1260 ° C. It was decided to obtain a fired product by firing at. Then, the mixing ratio of the slurry is set to incineration ash: quartz: alumina cement: water = 50 to 60:40.
~ 50: 30: 50, and incineration ash: volcanic ash: quartz: alumina cement: water = 30-45: 15-30: 40: 3
It was set to 0:50.

The calcined product obtained by such a method is safe without elution of heavy metals and halogenated organic substances,
Moreover, the capital investment and the running cost for manufacturing this become low.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, incineration ash of at least one of industrial waste and general waste is re-fired to be vitrified.

Upon re-firing, the incineration ash or a mixture of volcanic deposits mixed with water is mixed with water, quartz as an aggregate, and a hardening material made of alumina cement to be solidified and molded. Molded product 1200
It is preferable to bake at ˜1260 ° C.

As described above, the present invention is characterized in that harmful substances are not eluted and the product can be directly made into a product.

Further, the apparatus used has a feature that it does not require a treatment cost because existing kilns and equipment can be used.

Furthermore, since the heavy metals and halogenated organic substances contained in the incinerated ash can be enclosed in the fired product,
There is no elution to the outside due to rainwater or groundwater, there is no risk of causing environmental damage even if this is used for landfill, and even when this is disposed of at the final treatment site,
Since it is not necessary to spend enormous environmental destruction countermeasure costs in the final treatment plant, the treatment cost of industrial waste and general waste can be greatly reduced, which greatly contributes to the cost reduction of treatment companies and local governments.

Moreover, since the fired product can be effectively used as a secondary product such as a water-permeable tile, a flower pot, a roof tile, a block for flower beds, a block for laying, and a block for fishing reefs, it is possible to open up a new market. The effect of economic levitation is great.

Since it has the characteristics of water permeability and light weight, it can be used in the field of functionality.

By the way, the incineration ash and the clay for pottery are made to have a weight ratio of 1: 1 and further dried by natural drying or by being hardened by adding a hardening material, and fired at a temperature of 1200 to 1300 ° C.

Quartz can be preferably used as the aggregate and alumina cement can be suitably used as the hardening agent. After naturally hardening in a mold having a desired shape, it is dried for a predetermined time (for example, 24 hours), and then, , 1230 ~ 1260 ℃
It is good to bake at the temperature of.

Furthermore, when a glaze is applied to the fired product and re-fired, it can be used as a substitute for pottery.

The incinerated ash may be incinerated from each of industrial waste and general waste, or may be a mixture of both.

[0025]

EXAMPLES Examples of the present invention will be specifically described below.

[0026]

(Example 1) Industrial waste, general waste, or a mixture of both wastes was incinerated at a temperature of about 600 to 850 ° C, and the incinerated ash was used as a raw material. Granular quartz or fine quartz, alumina cement as a hardening material, and water were mixed to obtain a slurry.

The mixing ratio was the following four by weight ratio.

(1) Incinerated ash: Coarse-grained quartz: Alumina cement: Water = 50: 50: 30: 50 (2) Incinerated ash: Coarse-grained quartz: Alumina cement: Water = 6
0: 40: 30: 50 (3) Incinerated ash: Fine quartz: Alumina cement: Water = 5
0: 50: 30: 50 (4) Incinerated ash: Fine quartz: Alumina cement: Water = 6
0: 40: 30: 50 The above-mentioned respective slurries were put into a predetermined mold, and each of them was charged with 2
After allowing it to stand at 5 ° C. for 24 hours for natural curing, it was removed from the mold and further cured at 25 ° C. for 72 hours.

The cured product was dried in a drier at 105 ° C. for one day and then calcined in a temperature range of 900 to 1260 ° C.

At any temperature below 1150 ° C., the incinerated ash did not vitrify, so that the shape could not be retained, but at 1150 to 1200 ° C., a sintered body having a hardness like sandstone was formed, and 1200 to 1260 A glassy fired product having a robust hardness that did not break at some handling at ℃ was obtained.

[0032]

(Example 2) Industrial waste, general waste, or a mixture of both wastes was incinerated at a temperature of about 600 to 850 ° C, and the incinerated ash was used as a raw material. Mix
Further, fine quartz as an aggregate, alumina cement as a hardening material, and water were mixed to obtain a slurry.

The mixing ratio was the following two weight ratios.

(1) Incinerated ash: Volcanic ash: Fine quartz: Alumina cement: Water = 45: 15: 40: 30: 50 (2) Incinerated ash: Volcanic ash: Fine quartz: Alumina cement:
Water = 30: 30: 40: 30: 50 The above-mentioned respective slurries are cast into a plate-shaped mold, and each is
After allowing it to stand at 5 ° C. for 24 hours for natural curing, it was removed from the mold and further cured at 25 ° C. for 72 hours.

The cured product was dried in a drier at 105 ° C. for one day and then calcined in a temperature range of 1200 to 1260 ° C.

Each of the fired products is in the form of a tile which is firmly baked and solidified, and when the water is applied from the upper surface, it absorbs water, and when the amount of water is increased, a glassy fired product having a water permeability enough to drip from the lower surface is obtained. Was obtained.

Example 3 A glaze was applied to the glass-like fired product obtained in Example 2 above, and 1
Rebaking at a temperature of 250 ° C. gave a glassy baked product with a glossy surface. It has been found that the inside is porous and lightweight, but has a property of impermeable to water because the glaze layer is firmly formed.

The glassy products obtained in each of the above examples can be filled with heavy metals and halogenated organic substances contained in incinerated ash in the glass and can be eluted to the outside by rainwater, groundwater, etc. Since there is no such thing, there is no danger of causing environmental damage even if it is filled up with land, and such a glassy fired product can be used as a functional product such as a water-permeable tile. It can be effectively used as a roof tile, a product such as a block for flower beds, a block for laying, a block for fish reefs, and also for a rubble stone for civil engineering.

Further, as shown in Example 3, the glass-like fired product to which glaze is applied can be used as a substitute for pottery.

[0041]

The present invention, which is carried out in the above-described mode, has the following effects.

(1) In the present invention as set forth in claim 1, incineration ash of at least one of industrial waste and general waste is mixed with water, quartz as an aggregate, and a hardening material made of alumina cement. The obtained slurry is put into a mold to be solidified and molded, and then the molded product is 1200 to 1260 ° C.
A method for producing a burned material using incinerated ash of industrial waste and general waste obtained by firing as described above, wherein the mixing ratio of the slurry is incinerated ash: quartz: alumina cement:
Water = 50-60: 40-50: 30: 50.
Therefore, the heavy metals and halogenated organic substances contained in the incinerated ash can be enclosed in the vitreous material by enclosing it in the glass, and can be disposed of easily and safely,
This can be reused as functional products such as water-permeable tiles, and it is light and easy to handle and safe, so it is a flowerpot or tile, or a flowerbed block or laying block,
It can be effectively used as a secondary product having a desired shape for blocks for fish reefs, and also for rubble stones for civil engineering, which enables new market development and has a great economic levitation effect.

(2) In the present invention according to claim 2, volcanic deposits are mixed with incineration ash of at least one of industrial waste and general waste, and the mixture is mixed with water and quartz as an aggregate. And a hardening agent made of alumina cement are mixed into a mold to be solidified and molded, and then the molded product is baked at 1200 to 1260 ° C to obtain industrial waste and general waste. A method for producing a fired product using incinerated ash as a raw material, wherein the mixing ratio of the slurry is
Incinerated ash: Volcanic ash: Quartz: Alumina cement: Water = 30〜
It is set to 45:15 to 30: 40: 30: 50. Therefore, the heavy metals and halogenated organic substances contained in the incinerated ash can be enclosed in the vitreous material by encapsulating it in the vitreous material, which can be easily and safely disposed of, and can be used as a function of a water-permeable tile or the like. Since it can be reused as a product, it is light and easy to handle and safe, so it can be used in flowerpots, roof tiles, flowerbed blocks, laying blocks, fish reef blocks, etc. It can be effectively used as a product, can open new markets, and has a great effect on the economy.

(3) According to the present invention as set forth in claim 3, the molded product is once baked, and the baked product is subjected to glaze and re-baked to be burned from incinerated ash of industrial waste and general waste as a raw material. I'm getting things. Therefore, although it has a porous interior, it has a glossy surface and is impervious to water, so it can be used as a lightweight ceramic substitute.

[0045]

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yasunori               506 Susaki-Den, Sasa-cho, Kitamatsuura-gun, Nagasaki Prefecture                (56) References Japanese Patent Laid-Open No. 51-50921 (JP, A)                 JP 63-201055 (JP, A)                 JP 63-274650 (JP, A)                 JP 62-191457 (JP, A)                 JP 62-212260 (JP, A)

Claims (3)

(57) [Claims] 1. A slurry obtained by mixing incineration ash of at least one of industrial waste and general waste with water , quartz as an aggregate, and a hardening material made of alumina cement is placed in a mold. Put it in and solidify it, then 1
That obtained by firing at 200~ 1260 ℃ industrial waste as well as single
It is a method of manufacturing a fired product that uses incineration ash of general waste as a raw material.
Then, the mixing ratio of the slurry is set to incineration ash: quartz: alumina cement: water = 50 to 60: 4.
0-50: 30: 50 and then a manufacturing method of industrial waste and incineration ash baked formed product shall be the raw material for general waste, characterized in that the. 2. An incineration ash of at least one of industrial waste and general waste is mixed with a volcanic sediment, and the mixture is mixed with water, quartz as an aggregate, and a hardener made of alumina cement. The slurry obtained by mixing is put into a mold to be solidified and molded, and then the molded product is 1200 to 1260 ° C.
Incinerator ash of in industry that obtained by firing waste and general waste
A method for producing a fired product as a raw material, comprising:
Mixing ratio, Incinerated ash: Volcanic ash: Quartz: Alumina cement: Water = 30 ~
45: 15-30: 40: 30: 50 and then a manufacturing method of industrial waste and incineration ash baked formed product shall be the raw material for general waste, characterized in that the. To 3. A baked formed product according to any one of claims 1 or 2, the incineration ash of industrial waste and general waste, characterized in that obtained by re-sintering after applying glaze to a raw material method of manufacturing a baked adult products that.