JPH10212154A - Production of glassy fired body, using incineration ash of industrial waste and general waste as raw material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the method for producing a glassy body by using in incineration ash of industrial waste and/or general waster as a raw material, and for which any heavy metal or halogenated organic matter in the raw material is not eluted. SOLUTION: This production comprises firing and vitrifying a mixture of pottery clay and incineration ash of at least any one of industrial sate and general waste, or a formed body solidified and formed from a slurry that is obtained by mixing the incinerate ash or a mixture of the incineration ash and a volcanic desposit with water, aggregate and a hardener, to produce the object glassy fired body. Since any heavy metal or halogenated organic matter is not eluted from the fired body this produced, the fired body is a sufficiently safe product and also, the capital investment and running cost, which are required for producing this fired body, and be reduced.

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 glassy fired product 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.

[0003] Industrial waste and general waste are reduced to 600 to 8
A method in which incineration is performed at a temperature of about 50 ° C, and the incinerated ash is discarded at a final disposal site for treatment.

[0004] Industrial waste and general waste are reduced to 600 to 8
A method of incineration at a temperature of about 50 ° C., and adding a hardening material such as cement, water and aggregate to the incinerated ash to form a solid product, thereby obtaining a secondary product such as a block.

[0005] Industrial waste and general waste are reduced to 600 to 8
A method in which incineration is performed at a temperature of about 50 ° C., and the incinerated ash is further melted at a high temperature of about 1300 to 1800 ° C. The molten slag is used as an aggregate for cement concrete, an interblocking material which has been pulverized, molded and refired, or added to a clay for ceramics as a glass component for ceramics.

[0006]

However, the conventional method described above still has the following problems.

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

[0008] Such elution of heavy metals and halogenated organic substances has a great effect on animals and plants in the natural world,
This can cause environmental destruction that has an adverse effect on the human body, and can be a major social problem.

Furthermore, with the spread of the mass-consumption type of lifestyle in recent years, the amount of garbage discharged tends to increase year by year.
Under such circumstances, it is said that the permissible life of the final disposal site owned by each municipality is about eight years. On the other hand, the construction of a new landfill site by local governments has been slow, with problems such as the selection and acquisition of landfill sites and compensation for the area.

In the method of (1), heavy metals and halogenated organic substances contained in the incineration ash remain in the cement concrete in the form of metals, oxides and chlorides in the same manner as in the above method. Water absorption
Due to the water permeation phenomenon, heavy metals, halogenated organic substances, and the like may elute out of the cement concrete, which may also cause environmental destruction.

In the method (1), since heavy metals and halogenated organic substances contained in the incinerated ash are dissolved in a slag phase mainly composed of silicic acid, heavy metals and halogenated organic substances are affected by rainwater and groundwater. Organic substances do not elute in water. However, the equipment for re-firing incinerated ash to produce molten slag is expensive at about 100 million yen per ton of incinerated ash,
In addition, the running cost is about 10,000 yen per ton of incinerated ash, so it is difficult for local governments with difficult financial conditions to construct a processing apparatus.

[0012]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for producing a glassy fired product from incinerated ash of industrial waste and general waste, which can solve the above-mentioned problems. For a mixture of incinerated ash of at least one of industrial waste and general waste and clay for ceramics, or an incinerated ash of at least one of industrial waste and general waste, or a mixture of the same and volcanic sediment A molded product obtained by solidifying and molding a slurry in which water, an aggregate, and a hardening material were mixed was fired and vitrified to obtain a glass-like fired material.

[0013] The glassy fired product obtained by such a method is safe without heavy metals and halogenated organic substances being eluted, and the equipment investment and running costs for producing the same are low.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is to vitrify at least one of industrial waste and general waste by recalcining.

In re-firing, water, aggregate and hardening material are mixed with the incinerated ash or a mixture of the incinerated ash and the volcanic sediment. It is preferable to fire a molded product obtained by solidifying and forming the slurry.

As described above, the present invention is characterized in that harmful substances are prevented from being eluted and that it can be directly formed into a product.

Further, since the apparatus to be used can use existing kilns and equipment, there is a feature that no processing cost is required.

Furthermore, since heavy metals and halogenated organic substances contained in the incineration ash can be encapsulated in the fired material,
It does not elute to the outside due to rainwater or groundwater, and there is no risk of causing environmental destruction even if it is used for landfill, and even if this is disposed of at the final treatment plant,
Since there is no need to invest huge costs for environmental destruction at the final disposal site, the cost of treating industrial waste and general waste can be greatly reduced, greatly contributing to cost reductions for disposal companies and local governments.

Moreover, the glassy fired product can be effectively used as a secondary product such as a permeable tile, a flowerpot, a tile, a flowerbed block, a laying block, a fishing reef block, and thus a new market can be developed. The effect of economic levitation is great.

Further, since it has characteristics such as water permeability and light weight, it can be used in the field of functionality.

By the way, the incinerated ash and the clay for porcelain are in a ratio of 1: 1 by weight, and are further cured by natural drying or addition of a curing agent and fired at a temperature of 1200 to 1300 ° C.

Quartz can be suitably used as the aggregate, and alumina cement can be suitably used as the hardening material. The material is naturally hardened in a mold having a desired shape, dried for a predetermined time (for example, 24 hours), and then dried. , 1230-1260 ° C
It is good to bake at the temperature.

Further, when the glassy fired product is coated with glaze and refired, it can be used as a substitute for pottery.

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

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below.

(Example 1) An incinerated ash obtained by incinerating industrial waste, general waste or a mixed waste thereof at a temperature of about 600 to 850 ° C is used as a raw material. After mixing at a ratio of 1: 1, the mixture is dried.
What was cured or cured by adding a curing agent such as a polyacrylic acid emulsion was fired in a kiln at a temperature of 1200 to 1300 ° C. The cured product was melted by firing to form a brown glassy foam.

(Example 2) An incinerated ash obtained by incinerating industrial waste, general waste, or a waste in which both are mixed at a temperature of about 600 to 850 ° C is used as a raw material. A slurry was obtained by mixing grained or fine quartz, alumina cement as a hardening material, and water.

The mixing ratio was the following four types by weight.

Incinerated ash: coarse quartz: alumina cement:
Water = 50: 50: 30: 50 Incinerated ash: coarse quartz: alumina cement: water = 60: 4
0:30:50 Incinerated ash: fine quartz: alumina cement: water = 50: 5
0:30:50 Incinerated ash: fine quartz: alumina cement: water = 60: 4
0:30:50 Each of the above slurries was charged into a predetermined mold,
After leaving it to stand at 5 ° C. for 24 hours to cure it naturally, it was removed from the mold and further cured at 25 ° C. for 72 hours.

The cured product was dried in a dryer at 105 ° C. for a whole day and night, and then fired in a temperature range of 900 to 1260 ° C.

In any of the calcined products, the incinerated ash was not vitrified at 1150 ° C. or lower, so that the shape could not be maintained. However, at 1150 to 1200 ° C., the sintered body had a hardness like sandstone and was 1200 to 1260. At ℃, a glassy fired product having robust hardness which was not broken by some handling was obtained.

This was fired stepwise in a kiln at 900 to 1200 ° C.

(Example 3) As a raw material, incinerated ash obtained by incinerating industrial waste, general waste, or a mixed waste of both at a temperature of about 600 to 850 ° C is used as a raw material. Were mixed, and 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 types by weight.

Incinerated ash: volcanic ash: fine quartz: alumina cement: water = 45: 15: 40: 30: 50 Incinerated ash: volcanic ash: fine quartz: alumina cement: water =
30: 30: 40: 30: 50 Each of the above slurries was cast into a plate-shaped mold,
After leaving it to stand at 5 ° C. for 24 hours to cure it naturally, it was removed from the mold and further cured at 25 ° C. for 72 hours.

The cured product was dried all day and night in a dryer at 105 ° C., and then fired in a temperature range of 1200 to 1260 ° C.

Each of the fired products has a tile shape which is firmly baked and solidified. When water is applied from the upper surface, water is absorbed, and when the amount of water is further increased, a glass-like fired material having water permeability enough to drip from the lower surface is obtained. Obtained.

Example 4 A glaze was applied to the glassy fired product obtained in Example 3 and refired at a temperature of 1250 ° C., whereby a glassy fired product having a glossy surface was obtained. This was found to be porous and lightweight inside, but had the property of being impermeable to water because the glaze layer was firmly formed.

The glassy product obtained in each of the above examples can encapsulate heavy metals and halogenated organic substances contained in incineration ash into glass, and can be eluted outside by rainwater or groundwater. There is no risk of causing environmental destruction even if it is landfilled.In addition, such a glassy fired material can be used as a functional product such as a permeable tile. It can be effectively used as products such as chicks and tiles, blocks for flower beds, blocks for laying, blocks for fish reefs, and also, for example, chestnuts for civil engineering.

Further, as shown in Example 4, a glass-like fired product provided with a glaze can be used as a substitute for pottery.

[0041]

The present invention is embodied in the above-described embodiment and has the following effects.

According to the present invention, incineration ash of at least one of industrial waste and general waste is mixed with clay for ceramics, and the mixture is fired to incinerate industrial waste and general waste. A glassy fired product using ash as a raw material has been obtained. Therefore, heavy metals and halogenated organic substances contained in the incineration ash can be encapsulated in the vitreous material,
It can be disposed of easily and safely, and can be used as a secondary product, enabling the development of a new market and a great economic levitation effect.

According to the second aspect of the present invention, a slurry obtained by mixing water, aggregate and hardened material into incinerated ash of at least one of industrial waste and general waste is put into a mold. Solidification molding is performed, and then the molded product is fired to obtain a glassy fired product made from incinerated ash of industrial waste and general waste. Therefore, heavy metals and halogenated organic substances contained in the incineration ash can be encapsulated in the vitreous material, and can be easily and safely disposed, and can be used as a secondary product having a desired shape. New market development is possible, and the economic levitation effect is great.

According to the third aspect of the present invention, at least one of the incineration ash of industrial waste and general waste is mixed with volcanic sediment, and the mixture is mixed with water, aggregate and hardened material. The obtained slurry is put into a mold and solidified and molded,
After that, the molded product is fired to obtain a glassy fired product made from incinerated ash of industrial waste and general waste. Therefore, this can be reused as a functional product such as a permeable tile, and it is light, easy to handle and safe, so it can be used for planting bees and tiles, or flowerbed blocks, laying blocks, fish reef blocks, and more. It can also be used effectively for rubble stones for civil engineering, etc., enabling the development of new markets and a great economic levitation effect.

According to the fourth aspect of the present invention, the glassy fired material obtained by firing the molded product once is subjected to glaze and refired to produce a glassy material obtained from incinerated ash of industrial waste and general waste. A fired product has been obtained. Therefore, although the inside is porous, it has a glossy surface and has the property of impervious to water, so that it can be used as a lightweight ceramic substitute.

Claims (4)

[Claims] An incinerated ash for industrial waste and general waste, characterized by mixing incinerated ash of at least one of industrial waste and general waste with clay for porcelain and firing the mixture. A method for producing a glassy fired product using as a raw material. 2. A slurry obtained by mixing water, aggregate, and hardening material with at least one of incineration ash of industrial waste or general waste is poured into a mold and solidified and formed.
A method for producing a glass-like fired product from incinerated ash of industrial waste and general waste, which is obtained by firing a molded product. 3. A slurry obtained by mixing volcanic sediment with incinerated ash of at least one of industrial waste and general waste, and mixing the mixture with water, aggregate and hardened material. A method for producing a glass-like fired material using incinerated ash of industrial waste and general waste as a raw material, wherein the material is obtained by solidifying and then firing the molded product. 4. The incinerated ash of industrial waste and general waste, obtained by applying a glaze to the glassy fired product according to any one of claims 1 to 3 and then refiring it. For producing a vitreous fired product.