JPH11322381A - Method for forming municipal refuse-burned ash into cement raw material, and cement raw material obtained by the method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for forming municipal refuge-burned ash into a cement raw material by which the municipal refuge-burned ash is utilized as a part of the cement raw material, and further to obtain the cement raw material obtained by the method. SOLUTION: Foreign matters and chlorine components are removed from a municipal refuge-burned ash to provide a substituent cement raw material (a) having components resembled to a low grade clay raw material (or a low grade iron raw material) in a normal cement raw material (b). The substituent cement raw material hardly causes trouble at the firing time or the finishing pulverizing time even if the substituent cement raw material is mixed with the normal cement raw material (b) because the foreign matters are removed from the substituent cement raw material (a). The cement obtained by mixing the substituent cement raw material (a) with the normal cement raw material (b) is utilized as the cement the same as the conventional cement, for example, such as the cement for a ferro-concrete obtained by burying reinforcing steel readily eroded by chlorine because the chlorine component is removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to municipal solid waste incineration that removes chlorine and foreign substances from municipal incineration ash discharged from a waste incineration plant and can be used as a part of cement raw materials. The present invention relates to a method for converting ash into a cement raw material and a cement raw material obtained by the method.

[0002]

2. Description of the Related Art Municipal waste, which is general waste discharged from a living area, is collected by a cleaning car or the like, and a part thereof is incinerated by an incinerator of a waste treatment plant. The main components of the incinerated ash after incineration are SiO ₂ , Al ₂ O ₃ , Fe ₂ O ₃ , and C ₂ similar to raw materials of Portland cement, particularly clay raw materials.
aO and the like. However, municipal solid waste incineration ash contains components that are incompatible with cement. A representative component is chlorine, which erodes the reinforcing steel in reinforced concrete. This chlorine contains about 5 to 10% by weight of municipal solid waste incineration ash, especially fly ash. Therefore, municipal solid waste incineration ash cannot be used as it is as a raw material for Portland cement, although it is useful as a raw material for silicon and aluminum.

Therefore, conventionally, municipal solid waste incineration ash has been put into a dry cement kiln together with dried sewage sludge,
A so-called eco-cement (synthetic term of ecology and cement) for intermediate production of cement clinker by firing at a relatively low temperature of about 1350 ° C. has been developed. Eco cement, calcium chloroaluminate not included in Portland cement _{(C 11} A 7 · CaC
l ₂ ) is present in a large amount as a gap phase that fills gaps in the cement clinker. On the other hand, there is almost no calcium aluminate (C ₃ A) normally contained in Portland cement. Thus, unlike the initial hydration reaction of ordinary Portland cement, Ecocement immediately after injection with ettringite and Friedel's salt (C ₃ A.CaCl
_The hydration reaction proceeds while producing ₂ · 10H ₂ O), followed by vigorous hydration of ettringite. As a result, the setting time of the cement is shortened, and the quick-hardening of strength development is obtained.

[0004]

However, such an eco-cement in the prior art has a relatively large amount of chlorine in its components. For this reason, its use has been limited to the field of a non-muscular system that does not use a reinforcing bar. For example,
Marine concrete such as fishing reefs and wave-dissipating blocks, and ground improvement materials. As a result, it could not be used for reinforcing steel structures, which account for most of the uses of cement. On the other hand, in this municipal solid waste incineration ash, for example, empty cans, iron scraps, unburned telephone directories, glass pieces, pottery pieces,
Since it contains a large amount of foreign matter such as large and small forks, nails, bolts, nuts, etc., it was necessary to remove such foreign matter in order to convert municipal solid waste incineration ash into a raw material for cement.

Therefore, as a result of intensive studies, the inventors have found that chlorine contained in municipal solid waste incineration ash is removed, for example, by washing with water to reduce the chlorine content allowable amount in cement raw materials of JIS standard to 200 ppm or less as much as possible. On the other hand, by removing foreign substances such as empty cans and bolts and nuts by, for example, classification using a sieve, a component similar to the clay raw material in the Portland cement cement raw material is performed. And found that the present invention was developed.

[0006]

An object of the present invention is to provide a method for converting municipal solid waste incineration ash into a cement raw material in which municipal solid waste incineration ash can be used as a part of the cement raw material, and to provide a cement raw material obtained by this method. And its purpose. Another object of the present invention is to provide a method for converting municipal waste incineration ash into a cement raw material, which can relatively easily and reliably remove foreign substances and chlorine from municipal waste incineration ash. A further object of the present invention is to provide a method for converting municipal waste incinerated ash into a raw material for cement, which can effectively remove chlorine from municipal waste incinerated ash. Still further, the present invention provides a method for converting municipal solid waste incineration ash into a cement material which can reduce the chlorine concentration in the incineration ash with a relatively small facility cost and in a relatively short period of time. Aim. An object of the present invention is to provide a method for converting municipal waste incineration ash into a cement raw material that can be used in a relatively large amount as a part of the cement raw material. Another object of the present invention is to provide a method for converting municipal waste incineration ash into a cement raw material, which can remove insoluble chlorine and further remove chlorine in the municipal waste incineration ash.

[0007]

According to the first aspect of the present invention, there is provided a city having a step of removing foreign matter from municipal waste incineration ash and a step of removing chlorine contained in municipal waste incineration ash. This is a method for converting waste incineration ash into cement raw material. Municipal waste refers to municipal waste discharged from living areas such as cities. That is, the main types of general waste handled here include combustible waste such as papers, chunks, fibers, wood, and bamboo among general wastes incinerated at a waste treatment plant. In addition, based on the actual situation of collection of sorted garbage, this includes some non-combustible and non-burnable garbage such as plastic, rubber, metal, glass and ceramics, and miscellaneous materials.

[0008] Chlorine in municipal solid waste incineration ash usually accounts for 5 to 10% by weight of the entire incineration ash (fly ash). Naturally, the reduction value of chlorine concentration in municipal solid waste incineration ash after desalination treatment is zero.
Is most preferable, but the numerical value is not limited. However, it is preferable that the chlorine content is set to 200 ppm or less, which is the allowable amount of chlorine contained in the cement raw material according to the JIS standard. The lower the chlorine content, the greater the proportion of materials from this municipal solid waste incineration ash that will be replaced by some of the cement raw materials.

The foreign matter in the municipal waste incineration ash can be removed, for example, by classification using a sieve as described in claim 2, for example, magnetic separation by magnetic force, or useful trash contained in the municipal waste incineration ash. Specific gravity selection, which separates an ash component and an unnecessary metal component using a difference in specific gravity, may be used. Also,
The order of the process of converting the municipal waste incineration ash into a cement raw material is not limited to the foreign matter removing step → chlorine removing step as described in claim 3, but may be the reverse chlorine removing step → contaminant removing step.

According to a second aspect of the present invention, the foreign matter removing step is performed by classifying the municipal waste incineration ash, and the chlorine removing step is performed by washing the municipal waste incineration ash with water. This is a method for converting ash into a cement material. For classification of municipal solid waste incineration ash, for example, 65 mm (removing empty cans, iron scraps, unburned telephone directories, etc.) → 20 mm (empty cans,
Remove glass, pottery pieces, large forks, etc.) → 5mm
A method using a sieve having a different mesh size, such as removing nails, bolts and nuts, and a small fork, can be adopted. The particle size after classification is 5 mm
The following is preferred. If it exceeds 5 mm, substances that cannot be crushed by a finishing mill or the like provided in the finishing process of cement manufacturing equipment (for example, forks and stainless steel pieces)
May remain.

[0011] In addition to the types of municipal waste incineration ash that can be washed with water, in addition to the embedding in the soil of a managed disposal site as set forth in claim 4, for example, the incineration ash may be buried in the normal soil or embanked. And exposing it to rainwater. Further, in addition to such a rain exposure method, water may be forcibly sprinkled with a sprinkler or a water sprinkler to remove chlorine to a predetermined value in a shorter time. Further, as another watering equipment as described in claim 4, for example, municipal waste incineration ash is put into a large washing tank, and water is sprinkled in this tank, or the municipal waste incineration ash is transported by a belt conveyor or the like. Water may be sprayed at the part.

According to a third aspect of the present invention, in the process of converting the municipal solid waste incineration ash into a cement material, the chlorine removing step is performed after the foreign matter removing step.
The method for converting municipal solid waste incineration ash into a cement raw material as described in (1).
If the chlorine removal step is performed after removing foreign matter, the amount of municipal waste incineration ash buried in the soil is reduced by that amount, and desalination can be efficiently performed in a relatively narrow space in a short period of time.

According to a fourth aspect of the present invention, in the chlorine removing step, the municipal solid waste incineration ash is buried in the soil of the controlled disposal site with the surface covered with soil, and then exposed to rainwater. The method for converting municipal solid waste incineration ash into a cement raw material according to any one of claims 1 to 3, wherein water is forcibly sprayed by a sprinkler, a watering machine or other watering equipment. The use of a managed landfill is preferable to the case where this municipal solid waste incineration ash is buried in a general landfill. This is because the controlled disposal site is equipped with secondary facilities for detoxifying the treated water containing chlorine after cleaning. During the burial period in the soil, the composition ratio of municipal solid waste incineration ash, the amount buried, the depth of burial in the soil, the depth of the soil cover, the permeability of the soil and municipal incineration ash, the amount of rainfall, and the amount of water spray It depends on various conditions such as.

According to a fifth aspect of the present invention, in the chlorine removing step, municipal solid waste incineration ash is washed with water;
2. The method according to claim 1, wherein the washing is performed by pickling using an acidic solution.
A method for converting municipal solid waste incineration ash into a cement raw material according to any one of claims 4 to 4. Municipal solid waste incineration ash contains chlorine that is soluble in water and chlorine that is insoluble. This latter chlorine content usually elutes in acidic solutions,
By performing not only water washing but also acid washing, most of the chlorine contained in the incinerated ash can be removed.
Examples of the acid for pickling include nitric acid, sulfuric acid, and carbonic acid.

According to the experiment of the inventor, the total chlorine concentration was 4100 ppm before the water washing as the desalting treatment, but it was lowered to about 2600 ppm by performing the predetermined water washing. At this time, the concentration of insoluble chlorine which was not eluted by washing with water was about 1000 ppm, which was the same as before the washing, relative to the total chlorine concentration. Therefore, when the water washing is sufficiently performed and the water-soluble chlorine concentration becomes close to 0, the total chlorine concentration becomes about 1000 p.
pm. Moreover,
The remaining insoluble chlorine can be removed by pickling with, for example, nitric acid. Thereby, the total chlorine concentration can be brought close to zero.

According to a sixth aspect of the present invention, there is provided municipal waste incineration ash.
Foreign matter is removed from the inside, and also included in this municipal solid waste incineration ash.
From municipal solid waste incineration ash from which chlorine
It is a raw material. 5mm obtained from municipal solid waste incineration ash
The following components of cement raw materials are used for Portland cement
Clay raw material of cement raw material or iron field used
Similar to low-grade iron raw materials in factories with low-grade materials
It will be. That is, for example, moisture (11.4 weight
%), Ig. loss (5.45% by weight), SiO
₂(39.62% by weight), Al₂O₃(14.71 weight
%), Fe₂O₃(13.20% by weight), CaO (1
6.84% by weight), MgO (2.42% by weight), SO₃
(0.68% by weight), Na₂O (2.35% by weight), K
₂O (1.41% by weight), TiO ₂(1.40 weight
%), MnO (0.13% by weight), P₂O₅(1.50
Wt%), ZnO (0.26 wt%), Cr₂O
₃(0.04% by weight) and CuO (0.20% by weight).
You. At this time, the total chlorine concentration is, for example, about 2600 ppm.
Degrees.

[0017] Incidentally, the composition of the clay raw material in the cement raw material
Minutes are usually water (10-15% by weight), ig. los
s (4-7% by weight), SiO₂(65-70% by weight),
Al ₂O₃(13 to 15% by weight), Fe₂O₃(4-6
% By weight) and CaO (1 to 3% by weight). In addition,
The component of the iron raw material in the cement raw material is usually water (2 to 8 weight
%), Ig. loss (4-5% by weight), SiO₂(3
~ 35% by weight), Al₂O₃(3 to 8% by weight), Fe₂
O₃(20-67% by weight), CaO (3-30% by weight)
It is. The size of municipal solid waste incineration ash from which foreign matter has been removed
As described above, the particle size is preferably 5 mm or less.

[0018]

According to the method for converting municipal solid waste incineration ash into a cement raw material according to the first to fifth aspects of the present invention and the cement raw material according to the sixth aspect, foreign matter or chlorine unnecessary as a cement raw material from the municipal waste incinerated ash. Remove the minute. As a result, a substitute raw material having components similar to the low-grade clay raw material (or the low-grade iron raw material) in the cement raw material can be obtained. In addition, since the foreign matter has been removed, there is no problem even if it is integrally treated with a normal cement raw material in the step of firing the cement raw material or the step of finishing the cement clinker. In addition, since the chlorine content has been removed, for example, cement manufactured by mixing with ordinary cement raw materials, firing, and adding limestone to pulverize, like general-purpose cement, can be used for various purposes can do. For example, it can be used as a cement for reinforced concrete in which a reinforcing bar which is easily eroded by chlorine is embedded.

In particular, according to the second aspect of the present invention, the incineration ash from municipal waste is classified to remove foreign matter, and the chlorine in the incineration ash is removed by washing with water. And chlorine can be relatively easily and reliably removed.

According to the third aspect of the present invention, foreign matter is removed from the incineration ash of municipal waste prior to the removal of the chlorine content. A relatively time-consuming and relatively time-consuming step of removing chlorine can be performed in a relatively short time.

Further, according to the invention described in claim 4,
The municipal solid waste incineration ash is buried in the soil of a managed landfill and then covered with soil over the surface of the buried ash, exposed to rainwater, and also by using a sprinkler, water sprinkler or other watering equipment. Since the water is forcibly sprayed on the soil cover, the chlorine concentration in the incinerated ash can be reduced with a relatively small facility cost and in a relatively short time. As a result, the obtained substitute raw material can be used in a relatively large amount as a part of the cement raw material.

According to the invention described in claim 5,
When removing chlorine from municipal solid waste incineration ash, not only municipal solid waste incineration ash is washed with water, but also acid pickling using an acidic solution is performed. This makes it possible to remove not only the water-soluble chlorine constituting a part of the chlorine but also the insoluble chlorine which is the remaining component. As a result, the chlorine content of the obtained cement raw material can be further reduced. Therefore, the raw material obtained from the municipal solid waste incineration ash can be replaced with a larger proportion of the normal cement raw material.

[0023]

Embodiments of the present invention will be described below. FIG. 1 is an overall configuration diagram of a municipal solid waste incineration ash cement raw material applying apparatus to which a municipal solid waste incinerated ash method according to an embodiment of the present invention is applied. FIG. 2 is a configuration diagram showing a chlorine removal step by washing municipal waste incineration ash with water. A cement raw material (alternative cement raw material) obtained from municipal solid waste incineration ash according to one embodiment of the present invention was produced as follows. That is, in the municipal solid waste incineration ash 11 shown in FIG. 1, the municipal solid waste incineration ash 11 is first classified, and then the chlorine content in the municipal solid waste incineration ash 11 is classified. Remove by washing with water. First, the classification process of the municipal waste incineration ash 11 will be described.

That is, as shown in FIG. 1, municipal solid waste incineration ash 11 transported from a municipal waste treatment plant is
The sieve is supplied to a classifier 12 for coarse classification, which has a sieve mesh 12a having a mesh size of 65 mm. Empty cans, scrap iron,
Unburned telephone directories and the like remain, and municipal waste incineration ash 11 of 65 mm or less is obtained from under the net. The municipal waste incineration ash 11 classified to 65 mm or less has a slightly coarse mesh size of 2.
It is sent to a classifier 13 having a sieve screen 13a of 0 mm. Here, by classification, empty cans, glass, pottery pieces, large forks, etc., remain on the net, and 20
The municipal solid waste incineration ash 11 mm or less is obtained. Thereafter, the municipal waste incineration ash 11 having a size of 20 mm or less is put into a classifier 14 having a sieve 14a having a mesh size of 5 mm. While nails, bolts and nuts, small forks, etc. remain on the net, municipal waste incineration ash 1 mm or less from below the net
1 is obtained. Next, the chlorine removal process of the obtained incinerated ash 11 of 5 mm or less in municipal waste will be described.

That is, as shown in FIG. 1, a large refuse incineration ash charging hole 15 is firstly excavated in a managed landfill using a shovel car or the like. Then, the municipal solid waste incineration ash 11 having a size of 5 mm or less is put into the refuse incineration ash charging hole 15, and the surface thereof is covered with the soil cover 16. This is to prevent the surface layer portion of the municipal waste incineration ash 11 from scattering due to a strong wind or the like. In this state, it is exposed to rainwater for 3.5 months (total rainfall during this period is 471 mm). Next, water is forcibly sprayed from above the covering soil 16 by the watering truck 17 or the sprinkler 18 (total watering amount 116t). Thus, chlorine contained in the municipal waste incineration ash 11 is washed and removed with water. Since forced watering is also used, this waste incineration ash injection hole 1
The municipal solid waste incineration ash 11 buried in 5 will be the same as that exposed to rainwater for 18 months (with an annual rainfall of 160
0 mm). By doing so, chlorine content is 260
An alternative cement material a of 5 mm or less removed to 0 ppm or less is obtained.

The amounts of the respective components contained in the alternative cement raw material a were analyzed by a powder X-ray diffraction method and found to be substantially the same as those described in the above “Means for Solving the Problems” (paragraph number “0015”). Met. If the municipal solid waste incineration ash 11 after washing with water is acidified with, for example, nitric acid, not only water-soluble chlorine but also insoluble chlorine that is insoluble in water can be removed from the municipal waste incineration ash 11, and cement raw material can be removed. The harmful chlorine content can be further reduced, and the replacement cement raw material a obtained from the ash 11 can be used as a part of the existing normal cement raw material b in a larger ratio.

The alternative cement raw material a after a predetermined rain exposure (including watering) period is excavated from the refuse incineration ash charging hole 15. Then, it is put into the preheater 19 together with the normal cement raw material b transferred from a cement raw material storage silo (not shown). The mixing ratio at this time is: substitute cement raw material a: normal cement raw material b = 1: 4000. The cement raw materials a and b are calcined to near 1000 ° C. while passing through the preheater 19.
After that, it is put into the dry cement kiln 20. Here, it is fired, and the cement clinker 21 is intermediately manufactured. The obtained cement clinker 21 is cooled by a clinker cooler (not shown), and then added with gypsum and pulverized in a finishing mill. Then, they are packed and then shipped. As described above, since the municipal waste incineration ash 11 is classified to 5 mm or less in the classification step, metal pieces such as small forks are almost completely removed from the substitute cement raw material a. Thereby, after crushing by the finishing mill, no foreign matter remains in the inside of the mill, and the cement raw materials a and b can be crushed well.

As described above, the foreign matter and chlorine which are not suitable as the cement raw material are removed from the municipal waste incineration ash 11. Therefore, the alternative cement raw material a obtained from the municipal waste incineration ash 11 can be used as a general-purpose existing ash. Normal cement raw material b
Can be used as part of In addition, foreign substances contained in the municipal solid waste incineration ash 11 are separated into sieve nets 12a (classified by 65 mm) and 13a (2
Classifier 1 having 0 mm classification) and 14a (5 mm classification)
Since the chlorine in the municipal waste incineration ash 11 was removed by washing with water, the foreign matter and chlorine in the municipal waste incineration ash 11 were compared. It is easy and reliable.

Further, the removal of the foreign matter and the removal of the chlorine content mean that the chlorine content is first removed and then the chlorine content is removed. Therefore, the removal of the chlorine content from the municipal waste incineration ash 11 can be effectively performed. It can be carried out. Furthermore, since the chlorine content is removed by the rain method in a controlled disposal site, and forced watering is also performed by using a watering truck 17 and a sprinkler 18, the facility cost is relatively low and the cost is relatively low. In a short period of time, the chlorine concentration in the ash 11 can be reduced. In this embodiment, the chlorine content in the municipal waste incineration ash 11 is reduced to 2600 ppm or less, so that a relatively large amount of the substitute cement raw material a can be used as a part of the cement raw material b.
Since the municipal solid waste incineration ash 11 is buried in the management-type disposal site, the water containing chlorine after cleaning is rendered harmless by the processing equipment normally provided in this disposal site.

Here, referring to FIG. 2, the result of testing the washing process of the municipal waste incineration ash 11 will be described. In addition,
Here, the municipal solid waste incineration ash 11 is the one before classification. As shown in FIG. 2, first, a waste incineration ash input hole 15 having a bottom surface of 5 × 7 m, an upper surface of 7 × 9 m, and a depth of 1.3 m was excavated in a landfill (managed disposal site) using a shovel truck or the like. Thereafter, the municipal solid waste incineration ash 11 before classification was put into the hole 15 to a depth of 1.2 m. The municipal solid waste incineration ash 11 is obtained by incinerating general refuse brought from a municipal waste treatment plant. Then, cover the surface of the municipal incineration ash 11 with a covering soil 16 of 100 to 200 mm, and suppose that it will be raining outdoors for about one year, and use a watering truck 17 or a sprinkler 18 to forcibly spray water. Carried out. The test period is about three and a half months. During this period, the cumulative rainfall that actually fell in this area was 4
71 mm. And the amount of water sprayed forcibly is
It was 116 t (1800 mm in terms of rainfall). As a result, the annual average rainfall at the landfill here is 1600 mm
This amount is about one and a half years in terms of annual average rainfall.

The sample was sampled by the following method.
Each sample had a size of 30 mm or less classified by a JIS screen sieve, and foreign matters such as iron chips had been visually removed in advance. For the sample before the washing process, sample from any three places of the buried municipal waste incineration ash 11,
The sample which mixed them was used. As shown in FIG. 2, the sample after the water washing treatment had three positions in the horizontal direction (the positions (1), (3) at 1.8 m each from the left and right ends of the refuse incineration ash charging hole 15 and the center). Position (2)), and at each of the positions (1) to (3), 200 m in the depth direction
Samples sampled at m, 500 mm, and 1000 mm and a sample obtained by mixing all of them were used. The chlorine concentration was analyzed by a colorimetric method according to the chlorine concentration determination method of JIS (R5202). However,
The water-soluble chlorine concentration was determined by adding 100 ml of water to 2 g of the sample, stirring the mixture for 30 minutes, filtering it, and analyzing the filtrate washed with water. Hereinafter, the analysis results are shown.

The chlorine concentration before the water rinsing treatment is the same as the total chlorine concentration which is the concentration of all chlorine contained in the sample.
It was 00 ppm. It was confirmed that the total chlorine concentration was reduced to nearly 1000 ppm even with the water washing treatment performed this time. Next, the chlorine concentration at each position after the water washing process will be described with reference to Table 1.

[0033]

[Table 1]

Each numerical value is a result obtained by examining a sample sampled at the positions (1) to (3) shown in FIG. The following has become clear from Table 1. That is, the concentration of insoluble chlorine is constant at about 1000 ppm for each sample. From such a test, it was found that washing the municipal waste incineration ash 11 with water was effective in removing chlorine from the municipal waste incineration ash 11.

[0035]

As described above, according to the method for converting municipal solid waste incineration ash into a cement raw material and the cement raw material obtained by this method according to the present invention, unsuitable cement raw material from municipal solid waste incinerated ash is used. Since foreign substances and chlorine are removed, cement raw materials obtained from municipal waste incineration ash can be used as a part of general-purpose existing cement raw materials (for Portland cement).

In particular, according to the second aspect of the invention, the foreign matter is removed by classification and the chlorine content is removed by washing with water. Relatively easy and reliable.

Further, according to the third aspect of the present invention,
When removing foreign matter and chlorine from municipal solid waste incineration ash, the foreign matter is first removed and then the chlorine content is removed, so the chlorine content can be effectively removed from this incineration ash. .

Further, according to the invention of claim 4, this chlorine content can be removed by burying municipal waste incineration ash in a controlled disposal site and exposing it to rainwater, and furthermore, sprinklers and water sprinkling from over the soil cover. Since the forced watering is performed by using a car or other watering equipment, the chlorine concentration in the incinerated ash can be reduced at a relatively low equipment cost and in a relatively short time.

According to the fifth aspect of the present invention,
Since this chlorine removal step is performed by washing with water and pickling, not only water-soluble chlorine but also insoluble chlorine which is not soluble in water can be removed from the incinerated ash, which is harmful as a raw material for cement. The chlorine content is further reduced, and the cement raw material obtained from the incineration ash can be used as the existing cement at a higher ratio.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a facility for converting municipal waste incineration ash into a cement raw material to which a method for converting municipal waste incineration ash into a cement raw material according to an embodiment of the present invention is applied.

FIG. 2 is a configuration diagram showing a chlorine removal step by washing municipal waste incineration ash with water.

[Description of Signs] 10 Municipal solid waste incineration ash as a cement raw material facility, 11 Municipal solid waste incineration ash, 15 Waste incineration ash input hole, 16 Cover soil, 17 Water sprinkler, 18 Sprinkler, a Alternative cement raw material, b Normal cement raw material.

────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification symbol FI // B09B 1/00 ZAB B09B 5/00 N (72) Inventor Yama ▲ saki ▼ Masayasu No.1 Donanmachi, Yawatanishi-ku, Kitakyushu-shi, Fukuoka Prefecture No. 1 In the Cement Development Center of Mitsubishi Materials Corporation (72) Inventor Koichi Hashimoto No. 1-1 Donan-cho, Yawata-nishi-ku, Kitakyushu-shi, Fukuoka Prefecture In the Cement Development Center of Mitsubishi Materials Corporation (72) Inventor Toshiro Ishi ▲ Saki ▼ Fukuoka 1-1, Dongnan-cho, Yawatanishi-ku, Kitakyushu-shi, Japan Mitsubishi Materials Corporation Cement Development Center

Claims (6)

[Claims] 1. A method for converting municipal solid waste incineration ash into a cement raw material, comprising: a step of removing foreign matter from municipal waste incineration ash; and a step of removing chlorine contained in the municipal waste incineration ash. 2. The method according to claim 1, wherein the foreign matter removing step is performed by classifying the municipal incineration ash, and the chlorine removing step is performed by washing the municipal incineration ash with water. 3. The municipal solid waste incinerated ash according to claim 1 or 2, wherein the municipal solid waste incinerated ash is subjected to the chlorine removing step after performing the foreign matter removing step. Method. 4. The chlorine removing step comprises burying municipal waste incineration ash in the soil of a controlled disposal site with the surface covered with soil, and then exposing the ash to rainwater, or using a sprinkler, water sprinkler or other The method for converting municipal waste incineration ash into a cement material according to any one of claims 1 to 3, wherein water is forcibly sprayed by a water spraying facility. 5. The chlorine removal step according to claim 1, wherein the municipal solid waste incineration ash is washed with water and pickled with an acidic solution. Method for converting municipal solid waste incineration ash into a cement raw material as described in 1 above. 6. A cement raw material obtained from municipal waste incinerated ash from which foreign substances have been removed from the municipal waste incinerated ash and from which chlorine contained in the municipal waste incinerated ash has been removed.