JP2022006620A - Processing method for recycling wastes to useful materials - Google Patents

Abstract

To provide a processing method for recycling wastes to useful materials containing metals in water-insoluble states thus having high safety, which can be used multipurpose including ceramic materials at relatively low temperature with good efficiency, and a processor thereof.SOLUTION: A raw material supply passage 2 where fine powder-like raw materials prepared by adding metal insolubilization agents to incineration ashes of combustible general wastes or waste plastic fine powders can be supplied to is connected with a reductive reaction furnace 1, further connected with a combustion gas supply passage 3; furnace walls of this reductive reaction furnace 1 are formed from refractory bricks containing predetermined metal catalysts. The fine powder-like raw materials are heated to 200-400°C by far-infrared ray in a reductive atmosphere while being in contact with metal insolubilization agents and metallic catalysts to convert incineration ashes and wastes to useful materials.SELECTED DRAWING: Figure 1

Description

The present invention relates to a waste materialization treatment method and a materialization treatment apparatus for recycling general waste such as municipal waste and its incineration ash so that it can be reused.

General waste such as municipal waste contains a relatively large number of types of organic and inorganic substances, and the types of combustible waste include, for example, plastics, rubbers, papers, kitchen wastes, textiles, wood and the like. There are bamboos and the like, and non-burnable wastes include irons, glass or ceramics.

All of these become oxides and carbides after firing, and incinerator ash containing a mixture thereof remains as a residue. The main elements contained in such residues are non-metal elements such as carbon (C), oxygen (O), hydrogen (H), nitrogen (N), sulfur (S), chlorine (Cl), and iron. Examples thereof include metal elements such as (Fe), aluminum (Al), copper (Cu), zinc (Zn), manganese (Mn), nickel (Ni), tin (Sn), and lead (Pb).
It has long been requested to detoxify these and recycle them so that they are in a useful state.

In addition, combustible waste contains a large amount of water as well as organic matter, and the burning time required for incineration is considerably long in relation to the amount of water, so the treatment efficiency naturally deteriorates, and water-soluble heavy metal compounds and organic chlorine. If it contains compounds, it may have a harmful effect on the environment in which humans and other organisms exist, and it is necessary to detoxify it.

In order to burn waste so that it is sufficiently detoxified after evaporating the water, a treatment device or treatment plant with high treatment efficiency is required, and the waste is collected together at each time and place. Since it is necessary to process a large amount efficiently, the processing apparatus becomes large and complicated, and a large amount of equipment cost or the like is required.

As a method of recycling waste and incinerated ash known so far, the incinerated ash remaining after incinerating general waste at a normal incineration temperature (800 ° C or higher) is further subjected to dry distillation conditions in a reducing atmosphere. , Organic waste is mixed with carbonized fine-grained carbonized material and brought into contact with it to change the metals contained in the incinerator into a sparingly soluble metal compound, which activates catalytic action and adsorption capacity and is reprocessed into activated carbon. A method for producing activated carbon from waste is known (Patent Document 1).

Further, it is known that a heavy metal insolubilizer composed of potassium sulfate, sodium sulfate and Portland cement is added to incinerated ash as an adjusting agent, heat-treated with a rotary kiln, and further pulverized into cement (Patent Document 2). ..

Furthermore, it is a treatment method in which a pretreatment step for carbonization, a carbonization carbonization step, and a cooling step are performed in a closed building with little contact with the outside air. It is known that carbonization is formed on the furnace wall of a carbonization furnace and a chemical reaction using a metal oxide and a porous amorphous carbon is used to turn waste into a recyclable carbide (Patent Document 3).

Further, in a low oxygen state, a reduction reaction treatment step is performed in which the incinerated ash is heated to about 400 to 600 ° C. and maintained for 20 to 40 minutes, and then a stabilization reaction treatment is carried out in which the incineration ash is maintained at a treatment temperature of 200 to 450 ° C. for 40 to 60 minutes. There is known a method for treating incinerated ash in which the generated exhaust gas is heat-treated in the presence of a transition metal catalyst to make it harmless by performing a step and a treatment step of cooling to 80 ° C. or lower (Patent Document 4).

Japanese Patent No. 3840494 Japanese Patent No. 3814337 Japanese Patent No. 4599127 Japanese Patent No. 4150800

However, in the waste and recycling treatment method described in Patent Document 1, when carbide and incineration ash are mixed and heated at a relatively high temperature, porous activated carbon is produced, but as a ceramic. No materials have been produced that can be effectively used. Further, in order to sufficiently dehydrate and carbonize the incinerator ash having a large particle size and to make it porous so as to become activated carbon, a high temperature heating step of about 600 ° C. is required.

Further, as described in Patent Document 2, in the method of adding a heavy metal insolubilizer composed of potassium sulfate, sodium sulfate and Portland cement to the incinerated ash and heat-treating it, the heavy metal is insoluble in water, so that the safety is enhanced. , It is not crushed before the heat treatment, is heat-treated at a high temperature of about 600 ° C., and is crushed after that. The materials available are not shown.

In the treatment method described in Patent Document 3, the object to be treated using a castable refractory made of a transition metal containing a metal oxide as a powder for the furnace wall of a carbonization furnace is crushed but not finely pulverized. There was room for improvement in the efficient use of catalytic action in the carbonization furnace.

Further, the incinerator ash treatment method described in Patent Document 4 requires a heat treatment of 450 ° C. or higher in order to decompose dioxins, and the material obtained by this treatment method is a hydraulic cement-based material. It is only suggested.

Therefore, the problem of the present invention is to recycle waste such as incineration ash, which can be obtained as a material that can be used for ceramics in a highly safe state and can be efficiently recycled by heat treatment at a relatively low temperature. It is a processing method. It is also an issue to newly create a waste recycling treatment device that can be used for such a treatment method.

In order to solve the above-mentioned problems, the present invention presents a fine powder of incineration ash or waste plastic in contact with a metal insolubilizer and a metal-derived catalyst contained in the incineration ash, in a reducing atmosphere. This is a waste materialization method that requires a step of heating to 200 to 400 ° C. with infrared rays as an essential step.

The waste materialization treatment method that requires the above steps is included in the predetermined waste when the predetermined waste in the form of fine powder is heated in a reducing atmosphere while being in contact with the metal insolubilizer and the metal-based catalyst. Metals react with the metal insolubilizer to become a water-insoluble compound (solid) such as metal sulfide. Since carbon disulfide, which is a compound of a metal insolubilizer and carbon, is a covalent bond compound, it is also a water-insoluble compound, and the load on the external environment of the water-insoluble compound is small.

The metal-based catalyst promotes the formation reaction of such a water-insoluble compound in a reducing atmosphere, and enables the reaction at a relatively low temperature of 200 to 400 ° C. by far infrared rays.
Furthermore, since the incinerated ash and waste plastic of the object to be treated are in the form of fine powder, the heating reaction by far infrared rays is efficiently performed. In order to efficiently carry out the heating reaction in this way, it is preferable that the incinerator ash is an incinerator ash having a water content of 5 to 7% by mass.

If the above-mentioned waste materialization treatment is performed in this way, the ceramic materialization treatment of the predetermined waste can be efficiently performed, and it is versatile and can be used as a deodorant, a hygroscopic agent, a refractory brick, a soil conditioner, and the like. A certain ceramic material is obtained.

Further, as the incinerator ash, the incinerator ash of general waste can be adopted, and further, instead of the incinerator ash, powdered waste plastic or the incinerator ash may be mixed with the powdered waste plastic to carry out the materialization treatment of the present invention. can.

The materialization treatment equipment used in the above-mentioned waste materialization treatment method is a fine powder of combustible general waste incinerator ash fine powder or waste plastic fine powder to which a metal insolubilizer is added. It is equipped with a reduction reaction furnace to which a supply path for transportation and supply is connected, and a supply path for combustion gas is connected to this reduction reaction furnace as a heating source.

The reduction reaction furnace is made of a far-infrared radioactive material whose wall is integrally composed of a predetermined metal catalyst and a ceramic refractory. As the metal-based catalyst, a metal-based catalyst derived from a metal contained in the incinerator ash can be used.

As described above, in the materialization processing apparatus, the furnace wall of the reduction reaction furnace is made of a far-infrared radioactive material in which the predetermined metal-based catalyst and the ceramic refractory are compositely integrally formed, so that the furnace wall is relatively. Far-infrared rays can be emitted from the furnace wall heated to a low temperature into the reduction reaction furnace, and at that time, the above-mentioned far-infrared raw materials such as incineration ash are attached to the metal-based catalyst exposed on the furnace wall surface. Contact while being heated by infrared rays.

As a result, the reaction for producing a water-insoluble compound or the like in a reducing atmosphere is promoted, and the materialization treatment of the present invention can be efficiently performed.

In the present invention, the method for treating waste as a material is to treat fine powdery incinerated ash or waste plastic as a treatment target, and in contact with a predetermined metal insolubilizer and a metal-based catalyst, under low temperature conditions by far infrared rays in a reducing atmosphere. Since the heating process is an essential process, versatile ceramic materials can be obtained, and the metal in such materials is a highly safe water-insoluble compound, and the heating action by far infrared rays and the metal Combined with the action of the system catalyst, there is an advantage that the rematerialization process can be efficiently performed at a relatively low temperature.
Further, if the materialization processing apparatus of the present invention is used, there is an advantage that the above-mentioned advantageous processing method can be performed more efficiently.

Front view showing a part of the materialization processing apparatus of the embodiment notched. Section II-II sectional view of FIG. Section III-III sectional view of FIG. Explanatory drawing of the plant which arranged the materialization processing apparatus of embodiment A chart showing the results of heat resistance tests of refractory bricks manufactured using the materials obtained by the treatment method of the embodiment, and showing the relationship between temperature and linear expansion rate.

An embodiment of the present invention will be described below with reference to the accompanying drawings.
As shown in FIG. 1-4, the materialization processing apparatus (plant) used in the materialization processing method of the present invention includes a reduction reaction furnace 1, and the reduction reaction furnace 1 is flammable. A raw material supply path 2 capable of supplying a fine powdered raw material to which a metal insolubilizer is added is connected to fine powder of incinerator ash or waste plastic of general waste, and a combustion gas supply path 3 is also connected. There is. A high-temperature combustion gas obtained by burning combustible gas, petroleum, or the like is supplied to the combustion gas supply path 3 from the heating device 4 (FIG. 4).

The illustrated square box-shaped reduction reactor 1 is superposed on the inside of an iron plate exterior plate 5 and is covered with a castable refractory layer 6 such as refractory concrete in which alumina cement is mixed with a fire-resistant lightweight aggregate. The refractory bricks 7 are arranged without gaps inside the reduction reaction chamber 8, and the combustion chamber 10 is provided below the reduction reaction chamber 8. Reference numeral 9 is an iron edge frame used for assembling (bolt coupling) the reduction reaction furnace 1.

On the inner wall of the reduction reaction furnace 1, refractory bricks 7, which are far-infrared radioactive materials in which a predetermined metal catalyst and a ceramic refractory are integrally formed, are arranged without gaps and the furnace wall surface is covered.

The combustion gas supply path 3 described above is connected to a combustion chamber 10 separately provided below the reduction reaction furnace 1, and as shown by an arrow in the figure, high-temperature combustion gas opens on the floor of the reduction reaction chamber 8. It spouts upward from the part. Then, since the combustion gas is ejected from the inward opening at the upper end of the rectangular tubular heat-resistant metal outlet 11 toward the center of the reduction reaction chamber 8, the airflow flows along the furnace wall surface of the reduction reaction chamber. It flows to every corner of the 8 and stirs the atmosphere in the reduction reaction chamber 8.

In the reduction reaction furnace 1, a fine powder-like object (raw material) to which a metal insolubilizer is added to fine powder of incinerated ash and / or waste plastic is provided from the raw material supply path 2 connected to the upper lid material. , It is supplied in appropriate amounts by adjusting the gate valve (not shown).

In the reduction reactor 1, a mixture of incinerator ash and fine powder of waste plastic is heated by the heat conduction of the combustion gas and the far infrared rays emitted from the heated refractory bricks 7, and at that time, the airflow of the combustion gas is generated. The fine powder that floats on the refractory and is in an aerosol state is heated evenly and efficiently, and is further heated while being in contact with the metal-based catalyst exposed on the surface of the refractory brick 7 many times.

In this way, when the materialization treatment apparatus of the embodiment is used, the incinerator ash in the form of fine powder and the waste plastic are brought into contact with the metal insolubilizer and the metal-based catalyst in an aerosol state or a state corresponding to dry mixing. It can be heated to 200 to 400 ° C. by far infrared rays in a reducing atmosphere.

The materialized processed product after the reduction reaction is located on the side of the combustion chamber 10 from the processed product outlet 12 which opens in a rectangular shape on the floor surface made of refractory bricks 7 along the two facing side wall surfaces of the rectangular reduction reaction furnace 1. It falls into the hopper 13 from the processed material outlet 12 that opens to the floor surface formed by the castable refractory layer 6 of the combustion chamber 10 and is collected via the section (may be via a detour provided separately). Will be done.

As shown in FIG. 4, in order to pulverize combustible general waste and its incineration ash, when the general waste is transported from the storage chamber (pit) 14 by the conveyor 15, magnetic force is applied as necessary. After removing the metals, the powder is pulverized step by step through the required number of crushers 16 and then passed through the primary dryer 17, and then the pulverizer 18 is used to form a fine powder having a particle size of 100 to 150 μm. It is preferable to adjust the particle size.
Incinerator ash of general waste, which has been separately fired in advance, is appropriately supplied to the fine pulverizer 18 from the introduction path 18a.

Additives such as a metal insolubilizer are added to the material to be carried out from the fine pulverizer 18 in the mixer 19 laid in the transport path, and the mixture is stirred and mixed, and if necessary, the rotary secondary dryer 20 is used. After adjusting the water content to about 5 to 7% with 6% as a guide, it is supplied to the reduction reaction furnace 1.

As the conveyor used for the transport path, it is preferable to use a sealed screw conveyor that can transport the object to be transported in a sealed state in order to prevent the scattering of dust and the like, and the material obtained after the final heating is a water-cooled type. It is preferable that the product is stored in the processed material storage tank 22 while being cooled by the screw conveyor 21 of the above, and is appropriately used as a material.

The fine powdered incinerator ash is an incinerator in which general waste such as municipal waste is carbonized by combustion at 800 ° C. or higher, and incinerator ash derived from general waste can be usually used.
Organic substances that are likely to be contained in a relatively large amount in such incinerator ash are, for example, plastics, rubbers, papers, kitchen ash, fibers, wood and bamboo.

The oxides and carbides contained in the incineration ash of the organic substances or the elements contained therein are carbon (C), oxygen (O), hydrogen (H), nitrogen (N), sulfur (S), chlorine (Cl) and the like. Non-metal elements such as iron (Fe), aluminum (Al), copper (Cu), zinc (Zn), manganese (Mn), nickel (Ni), tin (Sn), lead (Pb), etc. It is a typical one.

As the fine powder incinerator ash, it is preferable to use incinerator ash adjusted to have a particle size of 100 to 150 μm because the heating efficiency by far infrared rays is good, and far infrared rays are more efficient than incinerator ash. It is preferable to adjust the water content of 6% by mass contained in the incinerator ash to an optimum value in the range of about 5 to 7% by mass so as to exert a good heating action.

If the incinerated ash is a fine powder having a particle size of less than 100 μm, the powder preparation work becomes difficult and the materialization treatment efficiency is considerably lowered, which is not preferable. Further, in the case of calcined ash having a large particle size exceeding 150 μm, it becomes difficult to efficiently carry out a heating reaction by far infrared rays, probably because the action of the metal-based catalyst is insufficient.

The metal insolubilizer used in the present invention is a well-known metal insolubilizer capable of sulfurizing a metal contained in incinerator ash to produce a water-insoluble and stable metal sulfide compound.

Examples of such metal insolubilizers include potassium sulfate (K ₂ SO ₄ ), potassium chloride (KCl), sodium sulfate (Na ₂ SO ₄ ), sodium silicate (Na ₂ SiO ₃ · nH ₂ O), and sodium sulfide (Na 2 SiO 3 · nH 2 O). Na ₂ S ・ 5H ₂₀ ), calcium chloride (CaCl ₂ ), calcium carbonate (CaCO ₃ ), sodium hydroxide (Ca (OH) ₂ ), gypsum (Na ₂ SO ₄ 2H ₂ O), ammonium chloride (NH ₄ ) Cl), iron sulfide (FeS ₂ ) and the like are exemplified, and among these, sulfide-based metal insolubilizers such as potassium sulfate and sodium sulfate are particularly preferable.

The metal-based catalyst used in the present invention is a metal catalyst such as a metal or a metal oxide contained in the incineration ash, a metal oxide catalyst, and the like, and includes heavy metals derived from general waste and the like, and usually has a plurality of metals. It is a composition in which dissimilar metals are mixed.

Specific examples of the components constituting such a metal-based catalyst include iron oxide (Fe ₃ O ₄ ), potassium oxide (K ₂ O) (0.5 to 1.5%) as an auxiliary catalyst, and alumina (Al ₂ ). O ₃ ) (2-4%), calcium oxide (CaO) (1-3%), silica (SiO ₂ ) (0.2-1%), magnesium oxide (MgO) (0.2-4%), etc. The heavy metal is contained in the form of oxides, hydroxides, sulfates, sulfides, phosphates and the like.

The transition metals among the metal elements such as iron, cobalt, nickel, copper and white metals such as ruthenium, rhodium, palladium, osmium, iridium and platinum dissociate hydrogen molecules into hydrogen atoms and enhance their activation. , It is preferable that it is contained as a component of a catalyst. Incidentally, the energy for dissociating hydrogen molecules is about 450 kilojoules, but hydrogen atoms are easily dissociated at room temperature on the surface of Ni, Pd, Pt, etc. and adsorbed on Ni, Pd, Pt. .. The driving force for this dissociation is the chemical affinity for hydrogen atoms on the metal surface.

Since the dissociated hydrogen atom is highly reactive, it is added to a hydrocarbon (ethylene, propylene, etc.) approaching the metal surface, and also to an organic compound such as a compound of carbon and oxygen to form a hydride. Further, white metal, Fe, Co, and Ni dissociate the CH bond of the hydrocarbon and cause hydrocracking. As described above, the catalyst has the ability to turn a metal molecule into an active metal atom and promote a chemical reaction without relying on a heat source.

Incinerator ash has many typical elements and few transition elements. Since the transition metals Ti, V, Cr, Mn, Fe, Cu, Zn and the like have too strong a bond with oxygen and become a metal oxide, it is preferable to reduce the amount of oxygen to about 6%.

Transition metal oxides are divided into those that are active in oxidation and those that are active in dehydrogenation. Fe ₂ O ₃ and Cr ₂ O ₃ are good catalysts for dehydrogenation because they are not reduced to the metallic state even in the presence of hydrogen molecules.

Cr in the incinerated ash is a chromium trioxide trioxide of CrO ₃ , which is easily dissolved in water, so that it becomes chromium hydroxide by the reaction with hydrogen, and becomes a stable insolubilized dichromium trioxide compound by the combustion process of chromium hydroxide. Typical metal oxides such as SiO ₂ , Al ₂ O ₃ , and MgO have an acid-base interaction with the reaction molecule, give a proton to the reaction molecule, and the reaction molecule abstracts the proton to activate the molecule.
It is a preferable aspect in the waste materialization treatment method of the present invention that the metal-based catalyst is a metal-based catalyst provided integrally with a ceramic refractory.

The reducing atmosphere adopted in the present invention refers to an atmosphere when heating in a deoxidized state isolated from the outside air, and the heating temperature in the reduction reaction furnace filled with the reducing atmosphere is 200 to 400 ° C., which is predetermined. Far-infrared rays It is preferable to heat in a range of 250 ° C. to 400 ° C. for about 20 to 60 minutes so that far-infrared rays are generated in a reduction reaction furnace made of a radioactive material and the action is remarkable.

When the incinerator ash is heat-treated in a low oxygen atmosphere, it is heated by far infrared rays (200 to 400 ° C.) in an atmosphere where fine incinerator ash is supplied, and hydrogen chloride that may be present in the incinerator ash. And dioxins are dechlorinated and decomposed.
That is, in an oxidizing atmosphere, dioxins are produced in large quantities from precursor substances and the like by reacting with chlorides, carbons, etc. in incinerator ash at around 300 ° C., but far infrared rays are emitted in a reducing atmosphere in contact with a specific catalyst. If it is used and heated to 200 to 400 ° C., hydrogen chloride and dioxins are decomposed.

In the far-infrared ray used in the present invention, the furnace wall in the reduction reaction furnace is formed of the far-infrared ray radioactive material in which the metal-based catalyst and the ceramic refractory are integrally formed, and is heated to the above-mentioned predetermined temperature. It can be generated by doing.

As the far-infrared radioactive material, ceramic refractory bricks are exemplified, but ordinary bricks may be adopted regardless of the material as long as they have a certain degree of refractory resistance. The main component of well-known refractory bricks is clay containing alumina and silica.

Ordinary bricks are made from primary minerals such as mud, silt and shale and clay, and refractory bricks are mostly made from secondary minerals such as clay.
For example, domestically produced clay materials commonly known as frogme clay and wood-brush clay are easily available as materials for making refractory bricks, and a large amount of water is mixed with these clays to remove impurities, and then the above-mentioned A predetermined metal-based catalyst is mixed in an amount of about 1 to 10% by mass, and a sheet of clay having a certain thickness is drained over several days, punched out, and dried in a rectangular shape. After that, refractory bricks are prepared by firing in a firing furnace.

Further, such refractory bricks and the like are integrally formed by mixing a metal-based catalyst and a ceramic refractory material in the state of a powder material, but the metal-based catalyst is formed on the surface of the ceramic refractory material. It may be a composite in which a mixture of ceramic and a binder made of a ceramic material is coated and integrated with a refractory by firing, and a metal catalyst and a ceramic refractory are stacked in layers to form a laminated body. You can also.

The far-infrared rays radiated from the far-infrared radioactive material thus obtained are electromagnetic waves having a wavelength of 3 μm or more, preferably a wavelength of 4 μm or more, and generally electromagnetic waves in a region having a wavelength of 3 μm or more and 1 mm or less are referred to as far-infrared rays. Called.
The far-infrared radioactive material such as refractory bricks described above can emit far-infrared rays having a wavelength of about 2.5 μm to 30 μm when heated to 200 to 600 ° C.

When waste is incinerated, it generates combustion heat of about 850 ° C. The calorific value of 1 ton of waste has an energy value of 2000 to 3000 kcal / kg, and 420 to 630 kwh of electric power can be obtained.
Also in the above embodiment, the heat of combustion may be introduced into the exhaust gas treatment apparatus when the exhaust gas discharged from the reduction reaction furnace via the filter is treated. That is, it is also possible to cool the exhaust gas with a waste heat boiler, recover the heat as steam, and install a power generation facility with the waste heat gas.

About 5% by mass of a fine powder of general waste incineration ash (average particle size 120 μm) and a sulfide-based metal insolubilizer (potassium sulfate and sodium sulfate) are mixed with the fine powder of waste plastic, and the above It was supplied to the reduction reaction furnace 1 having the structure shown in the embodiment and treated as a material.
The furnace wall of the reduction reactor 1 is made of refractory bricks containing about 5% of a metal catalyst containing iron oxide and alumina, and the furnace wall is heated to 250 to 400 ° C. and used as a material by far infrared rays in a reducing atmosphere. Processing was performed.
The analysis results of the heavy metal elution test (Notification No. 13 of the Environment Agency, 1973, "Testing method for metals contained in industrial waste") for the obtained materials are shown in Table 1 below.

As is clear from the results in Table 1, none of the heavy metals were eluted and the results were not detected or below the standard value, and the metals in the material were in a water-insoluble and highly safe state. It could be confirmed.

Further, refractory bricks of ceramic products using the obtained materials were manufactured, and their heat resistance was investigated by the temperature change of the linear expansion rate from 50 ° C. to 1180 ° C., and the results are shown in FIG.
As is clear from the results shown in FIG. 5, the refractory bricks (length 85.54 mm) to be tested are stable in the heat ray expansion rate range of -0.2 to 0.2% up to 1000 ° C. , It was recognized that the refractory bricks can be used sufficiently.

As described above, the materialization treatment method of the present invention and the apparatus thereof can obtain ceramic materials, and the metal in such materials becomes water-insoluble and highly safe, and has a relatively low temperature of 250 to 400 ° C. It was confirmed that it is possible to efficiently recycle waste such as incineration ash.

Further, when a granular soil conditioner (mineral fertilizer) was produced using the incineration ash material obtained by the materialization treatment method of the above embodiment and its performance was examined, onions, pumpkins, and agricultural crops were found. Green soybeans, watermelons, and rice grew significantly larger than those blank (without the addition of the same fertilizer), and good growth conditions were obtained.

1 Reduction reaction furnace 2 Raw material supply path 3 Combustion gas supply path 4 Heating device 5 Exterior plate 6 Castable refractory layer 7 Refractory bricks 8 Reduction reaction chamber 9 Iron edge frame 10 Combustion chamber 11 Outlet 12 Outlet 12 Hopper 14 Storage chamber 15 Refractory 16 Crusher 17 Primary dryer 18 Fine crusher 18a Introductory path 19 Mixer 20 Rotary secondary dryer 21 Screw conveyor 22 Processed material storage tank

Claims (5)

The essential step is to pulverize the incinerated ash or waste plastic of the waste and heat it to 200 to 400 ° C. with far infrared rays in a reducing atmosphere while in contact with the metal insolubilizer and the metal-based catalyst. The metal-based catalyst is the above-mentioned. A method for materializing waste, which is a metal-based catalyst derived from metal contained in incineration ash. The method for materializing waste according to claim 1, wherein the incinerated ash is incinerated ash having a water content of 5 to 7% by mass. The waste materialization treatment method according to claim 1 or 2, wherein the waste materialization treatment is a ceramic materialization treatment of incineration ash. The method for materializing waste according to any one of claims 1 to 3, wherein the incineration ash is incineration ash of general waste. It is a materialization treatment apparatus used in the materialization treatment method for waste according to claim 1, and is a fine powder raw material to which a metal insolubilizer is added to fine powder of combustible general waste and its incineration ash. It is equipped with a reduction reactor to which a supply path can be supplied and a supply path for combustion gas are connected. A waste materialization treatment apparatus made of a radioactive material, wherein the metal-based catalyst is a metal-based catalyst derived from a metal contained in the incineration ash.

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