JPH0523654A - Method for working dust incineration ash - Google Patents

Abstract

PURPOSE:To recycle dust incineration ashes by mixing a binder, cement, etc., with the dust incineration ashes. CONSTITUTION:The acrylic binder is compounded at 10 to 30 pts.wt., a neutralizer, such as zinc oxide, at 3 to 15 pts.wt., the dement at 20 to 30 pts.wt., and sand at 20 pts.wt. with 100 pts.wt. dust incineration ashes and the mixture is agitated and is poured into a form and is allowed to dry naturally. The acrylic binder is otherwise compounded at 10 to 30 pts.wt., the neutralizer, such as zinc oxide, at 3 to 15 pts.wt., and glass particle at 10 to 20 pts.wt., with 100 pts.wt. dust incineration ashes and the mixture is agitated, is poured into the form 2 and is pressurized and dried; further, the mixture is calcined for about 3 hours at about 100 deg.C. The recycling of the dust incineration ashes as building materials and far IR radiators is possible in this way and the cost is lower than the costs of the conventional materials.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing dust incineration ash, which is reused for building materials such as gutters, troughs, paving stones, far infrared panels and the like.

[0002]

2. Description of the Related Art Today, dust incineration ash is becoming a social problem, and a device for solidification has been studied in order to somehow reuse this dust incineration ash. This is a method in which the dust incineration ash is melted and recrystallized at a high temperature of 1000 ° C. or higher, and a method in which the dust incineration ash is mixed and solidified in an amount of 7 parts by weight with respect to 3 parts by weight of an adhesive such as an epoxy resin.

[0003]

The method of melting glass from dust incineration ash by high temperature treatment causes an increase in treatment cost. Solidification with an adhesive such as epoxy resin, which has been attracting attention in recent years, can reduce the equipment cost and shorten the processing time, but the price of processed products is extremely high because of the large amount of epoxy resin used. Since the dust incineration ash contains harmful components such as dioxins and heavy metals, this epoxy resin method is optimal for sealing the dust incineration ash, but the price of processed products is far too far from other competitive products. . The present inventor examined a method of stirring cement or sand in dust incineration ash and injecting it into a mold, but the molded product was fragile and could not be put to practical use. We found that the cause was the chemical properties of dust incineration ash (average particle size is 1 μm), and solved some problems, such as treating dust incineration ash with a neutralizing agent in advance, and finally commercialized it. . In addition, we have commercialized molded products that do not use cement. Hereinafter, the present invention will be described in detail with reference to the drawings.

[0004]

[Means for Solving the Problems] 3 to 15 parts by weight of zinc oxide as a neutralizing agent, relative to 100 parts by weight of dust incineration ash,
Ethanol was added to distilled water, and an acrylic binder was mixed in the mixture in an amount of 5 to 30 parts by weight and cement in an amount of 20 to 30 parts.
20 parts by weight of sand and 20 parts by weight of sand are mixed, stirred by a mixer, the agitated material is poured into a predetermined mold, the mold is pressurized (50 kg), and then taken out and naturally dried. .
3 to 15 parts by weight of zinc oxide for 100 parts by weight of dust incineration ash
1 part by weight, 10 to 20 parts by weight of glass particles, and a mixture of distilled water and ethanol with an acrylic binder added.
A mixture consisting of 0 to 30 parts by weight is thoroughly stirred, poured into a mold, pressurized, the molded product taken out of the mold is dried, and then baked at 800 to 1300 ° C. for 1 hour or more. . This method does not use cement.

[0005]

Function: The dust incineration ash is a powder with an average particle size of 1 μm, and since it contains harmful heavy metals and is chemically activated, the action of the binder cannot be expected. In the present invention, a neutralizing agent such as zinc oxide is mixed and stirred to modify the chemical characteristics of the dust incineration ash. A reactive binder prepared by adding an acrylic binder to a solution prepared by adding 10 parts by weight of ethanol to 5 parts by weight of distilled water accelerates the granulation of the modified dust incineration ash. Although the settant hardens due to a chemical reaction such as water, it is a reaction in an alkaline atmosphere, and it is not preferable to mix an acidic substance such as sea sand. The modified dust incineration ash has a good compatibility with cement, and in combination with the granulation action of the acrylic binder, an extremely excellent cement molded product became possible. The use of distilled water and ethanol promotes the alkalinity of the reaction system, which further promotes solidification of dust incineration ash and cement.

Instead of cement, glass particles (having an average particle size of 1 μm) are added in an amount of 10 to 20 with respect to 100 parts by weight of dust incineration ash.
Since the mixture added by weight is sufficiently stirred with a neutralizing agent such as zinc oxide and an acrylic binder, the modified dust incineration ash grows in a short time. 30 after pouring into the mold
Applying a pressure of about 0 kg reduces the gaps between the grown grains and ensures that the reactive binder is evenly distributed among the grains. By the process of drying with hot air of 50 to 60 ° C. for about 3 hours so that the dryness of the molded product is around 90%, the firing process at high temperature in the next process is smoothly performed.

[0007]

【Example】

[Example 1] 10 parts by weight of zinc oxide as a neutralizing agent, 20 parts by weight of an acrylic binder, 20 to 30 parts by weight of cement, and 20 parts by weight of sand to 100 parts by weight of dust incineration ash. In addition, stir with mixer 1. The acrylic binder is a mixture of 10 parts by weight of a mixed solution containing 1 part of distilled water and 2 parts of ethanol and 30 parts by weight of an acrylic binder. The feature of the present invention is to add distilled water and alcohol to the resinous binder. Reinforcing bars are arranged in advance in the mold 2 shown in FIG. 2, and the agitated material in which the dust incineration ash has been reformed by sufficient stirring is injected into this.
This mold is pressurized by about 50 kg and maintained for about 2 minutes, then this pressure is released, the mold 2 is removed and the mold is naturally dried. It was found that the strength of this road shoulder block 3 used as an earth building material is not inferior to that of conventional concrete. On the contrary, the fact that water permeates between the growing particles of dust incineration ash, which makes it excellent in water absorption, has also expanded the range of applications.

[Example 2] 5 parts by weight of a neutralizing agent such as zinc oxide, 10 parts by weight of an acrylic binder (mixed with distilled water and ethanol), and an average particle size of 100 parts by weight of incinerated dust ash Add 10 to 20 parts by weight of 1 μm glass particles,
Stir for about 30 minutes in the stirring container 4 (Fig. 1). The stirring container 4 is kept at about 40 ° C. and stirred. The agitated product is poured into the mold 5 having a predetermined shape, and a pressure of 300 kg is applied for 5 to 10
It lasts for about a minute. This pressurization makes the structure more compact. The molded product taken out of the mold 5 is dried with hot air at 50 to 60 ° C. for about 3 hours. When the dryness reaches around 90%, the drying is finished. Next, this molded product is 800 to 1300 ° C.
Calcination within the range of 3 hours. The molded product before firing was brittle, but the structure became dense and the hardness became extremely high by firing.

[Example 3] 3 to 15 parts by weight of a neutralizing agent such as zinc oxide per 100 parts by weight of dust incinerated ash, an acrylic binder (mixed solution 10 in a ratio of distilled water 1 to ethanol 2). A mixture of 30 parts by weight of an acrylic binder and 5 parts by weight of 30 parts by weight was used as a combination, and the above [Examples 1 and 2] were additionally tested. However, it was found that there is no problem in practical use.

FIG. 3 is an emissivity spectrum diagram in the far infrared region. It is a radiation characteristic when the temperature of the baked product according to Example 2 is raised to 400 ° C. (curve B). Since the dust incineration ash contains silicon as the main component, it exhibits very excellent radiation characteristics. If it is used as a building material, it can be used as a far-infrared radiation plate, and if it is embedded in a heater, its application will be greatly expanded as an industrial heater.

[0011]

In summary, according to the present invention, the dust incineration ash, the neutralizing agent such as zinc oxide, the binder liquid mixed with water, the cement and the sand are stirred by a mixer, and the mixture is placed in a predetermined mold. Pour in the agitator, preferably pressurize the mold and then take it out and let it air dry, or dust dust ash with a neutralizing agent such as zinc oxide and a mixture of distilled water and a binder,
The glass particles are mixed and stirred at an elevated temperature, poured into a mold and pressurized, and the molded product taken out from the mold is dried,
Since it is fired at a high temperature of 0 ° C or higher, a dust incineration ash molded product having a dense structure can be easily manufactured. Its manufacturing cost is comparable to conventional products, and its practicality is extremely high. In particular, excellent water absorption and far-infrared radiation characteristics can sufficiently meet new needs, and give a great gospel to the related traders for the reuse of dust incineration ash, which was a problem.

[0012]

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a processing method in which glass particles, an acrylic binder, and a neutralizing agent such as zinc oxide are mixed with dust incineration ash and fired.

FIG. 2 is an explanatory diagram of a processing method in which an acrylic binder, a neutralizing agent such as zinc oxide, and cement are mixed with dust incineration ash.

FIG. 3 is a far infrared radiation characteristic spectrum diagram of a fired molded product.

[Explanation of symbols]

1 mixer 2 formwork 3 shoulder blocks 4 stirring container 5 formwork

Claims (4)

[Claims] 1. A dust incineration ash, a neutralizing agent such as zinc oxide, a binder liquid mixed with water, cement, and sand are agitated by a mixer, and the agitated product is poured into a predetermined mold. ， Processing method of dust incineration ash, preferably pressurizing this form, then taking it out and naturally drying. 2. 5 to 30 parts by weight of zinc oxide, 3 to 15 parts by weight of zinc oxide, 5 to 30 parts by weight of a mixture obtained by adding ethanol to distilled water and an acrylic binder, and 20 parts of cement to 100 parts by weight of dust incinerated ash. The method for processing dust incineration ash according to claim 1, wherein -30 parts by weight and sand are mixed. 3. A dust incineration ash, a neutralizing agent such as zinc oxide, a mixture of distilled water and a binder, and glass particles are mixed and stirred, and the mixture is poured into a mold and pressurized, and the mold is removed from the mold. The molded product taken out is dried and baked at a high temperature of 800 ° C or higher,
Dust incineration ash processing method. 4. 100 parts by weight of dust incinerated ash, 3 to 15 parts by weight of zinc oxide, 10 to 20 parts by weight of glass particles, and a mixture of distilled water and ethanol to which an acrylic binder is added. 10 to 30 parts by weight of the mixture added,
Stir well, raise the temperature, pour this into a mold, press it sufficiently, dry the molded product taken out from the mold to a dryness of about 90%, and then bake at 800-1300 ° C for 1 hour or more. How to process dust incineration ash.