JP2006176767A - Method for producing colored aggregate produced from waste - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a product yield of an aggregate produced from waste so as to enlarge the application range thereof and to contribute to the settlement of waste problems by the re-use of a waste. <P>SOLUTION: A raw material is surface-treated using an oxidizing agent, proton charge is applied to the raw material surface for chemical activation, and then a colorant is added, followed by the treatment at a predetermined temperature for heating for a predetermined time for heating. Thus, on the raw material surface, reactive proton charge reacts with a functional group [<SP>-</SP>O-H] of the colorant to give a strong ether linkage [-O-]. At this time, the raw material is firmly colored so that it becomes less susceptible to fading and the degree of freedom for coloring is enlarged. Thus, a product yield for an aggregate produced from waste can be improved and the application range thereof can be expanded. Furthermore, the invention can contribute to the settlement of waste problems by the re-use of a waste. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to processing of general waste such as molten slag generated from refuse incineration ash, or industrial waste such as slag generated in the steel manufacturing process, and relates to a method for producing a colored aggregate using such molten slag or slag as a raw material.

Conventionally, an aggregate made from molten slag generated from refuse incineration ash or slag generated in the steel production process can be colored only in a single color because the pigment used for the coloring treatment is titanium oxide.

  Other colored raw materials include cinnabar, mica, chlorite, iron oxide, aluminum oxide, zinc oxide, allophane, kaolin, talc, montmorillonite, vermiculite, perlite, calcium carbonate, barium sulfate, silica, diatomaceous earth, polyethylene resin beads, polymethacryl Although there are methods using methyl acid resin beads, all of these are collected from nature, leading to natural destruction, and the generation of dust during pulverization causes deterioration of the working environment.

The method using titanium oxide is the same in terms of natural destruction and deterioration of the working environment.
JP 2004-155815 A JP 2004-149776

  The present invention has been made in view of the background art as described above, and can increase the degree of freedom of coloring aggregates to be colored, improve the product yield of aggregates generated from waste, And / or to expand the use of aggregates generated from waste.

  Another object of the present invention is to contribute to solving the waste problem by reusing the waste.

  The method for producing a waste-derived colored aggregate according to claim 1 comprises a step of mixing an oxidizing agent with a raw material, then adding a coloring agent, and processing at a predetermined heating temperature and a predetermined heating time.

  In the method for producing a waste-derived colored aggregate according to claim 2, the oxidizing agent used in the method for producing the waste-derived colored aggregate according to claim 1 includes an organic acid.

  The method for producing a waste-derived colored aggregate according to claim 3 includes a step of mixing a pretreatment agent with a raw material, then adding a colorant, and processing at a predetermined heating temperature and a predetermined heating time.

  In the method for producing a waste-derived colored aggregate according to claim 4, the pretreatment agent used in the method for producing the waste-derived colored aggregate according to claim 3 contains an organic phosphate compound.

  In the method for producing a waste-derived colored aggregate according to claim 5, the raw material used in the method for producing the waste-derived colored aggregate according to any one of claims 1 to 4 includes molten slag.

  In the method for producing a waste-derived colored aggregate according to claim 6, the raw material used in the method for producing the waste-derived colored aggregate according to any one of claims 1 to 5 includes slag.

  In the method for producing a waste-derived colored aggregate according to claim 7, the colorant used in the method for producing the waste-derived colored aggregate according to any one of claims 1 to 6 includes an adhesive.

  In the method for producing a waste-derived colored aggregate according to claim 8, the adhesive used in the method for producing the waste-derived colored aggregate according to claim 7 includes a solvent resin adhesive.

  In the method for producing a waste-derived colored aggregate according to claim 9, the adhesive used in the method for producing the waste-derived colored aggregate according to claim 7 includes an aqueous resin adhesive.

  In the method for producing a waste-derived colored aggregate according to claim 10, the colorant used in the method for producing the waste-derived colored aggregate according to any one of claims 1 to 9 includes an organic pigment.

  In the method for producing a waste-derived colored aggregate according to claim 11, the colorant used in the method for producing the waste-derived colored aggregate according to any one of claims 1 to 10 includes an inorganic pigment.

  The method for producing a waste-derived colored aggregate according to claim 12 is characterized in that the predetermined heating temperature of the method for producing a waste-derived colored aggregate according to any one of claims 1 to 11 is about 20 ° C or more. It is 300 degrees C or less.

  The method for producing a waste-derived colored aggregate according to claim 13 is the predetermined heating time of 3 seconds or more and 60 minutes of the method for producing a waste-derived colored aggregate according to any one of claims 1 to 12. It is as follows.

  In the present invention, it is considered that the raw material is surface-treated with an oxidant, and a proton charge is applied to the surface of the raw material to chemically activate it.

Waste from colored aggregate produced in accordance with the present invention, the raw material surface, and the proton charge that is reactive, functional group having a colorant ^[- O-H] and reacts, strong ether bond [-O −].

  As a result, the waste-derived colored aggregate produced according to the present invention has a specific effect that the coloring of the colorant on the raw material becomes strong and is difficult to fade.

  And if the manufacturing method of the waste origin colored aggregate which concerns on this invention is used, since a coloring freedom degree will expand, the waste origin colored aggregate which has various colors can be manufactured.

  In addition, the method for producing a waste-derived colored aggregate according to the present invention uses a waste such as slag or molten slag as a raw material to produce a waste-derived colored aggregate having high added value. Therefore, the waste recovery rate can be improved, and the use of waste such as slag or molten slag as waste-derived colored aggregate can be expanded.

  Furthermore, if the waste-derived colored aggregate manufacturing method according to the present invention is used, waste-derived colored aggregates having various colors can be manufactured, so the use of the waste-derived colored aggregate itself can be expanded. Can be planned.

  In the method for producing a waste-derived colored aggregate according to the present invention, the raw material is surface-treated with a pretreatment agent (more specifically, an organic phosphate compound), and the pretreatment agent (more specifically, organic It is considered that the phosphoric acid compound) forms a chelate bond with the hydroxyl group on the surface of the raw material (for example, slag and / or molten slag), and remarkably improves the adhesion and dyeing property (coloring effect) of the colorant.

  As a result, the waste-derived colored aggregate produced according to the present invention has a specific effect that the coloring of the colorant on the raw material becomes strong and is difficult to fade.

  And if the manufacturing method of the waste origin colored aggregate which concerns on this invention is used, since a coloring freedom degree will expand, the waste origin colored aggregate which has various colors can be manufactured.

  In addition, the method for producing a waste-derived colored aggregate according to the present invention uses a waste such as slag or molten slag as a raw material to produce a waste-derived colored aggregate having high added value. Therefore, the waste recovery rate can be improved, and the use of waste such as slag or molten slag as waste-derived colored aggregate can be expanded.

  Furthermore, if the waste-derived colored aggregate manufacturing method according to the present invention is used, waste-derived colored aggregates having various colors can be manufactured, so the use of the waste-derived colored aggregate itself can be expanded. Can be planned.

  Moreover, in the manufacturing method of the waste-derived colored aggregate according to the present invention, since the waste such as slag and / or molten slag can be reused as a raw material, the manufacturing of the waste-derived colored aggregate according to the present invention The method can contribute to solving the waste problem.

  Hereinafter, the manufacturing method of the waste origin colored aggregate which concerns on this invention is demonstrated in more detail, referring drawings.

  The method for producing a waste-derived colored aggregate according to the present invention includes a step of mixing an oxidizing agent with a raw material, then adding a coloring agent, and processing at a predetermined heating temperature and a predetermined heating time.

  In addition, the method for producing a waste-derived colored aggregate according to the present invention includes a step of mixing a raw material with a raw material, then adding a colorant, and processing at a predetermined heating temperature and a predetermined heating time.

  The raw material may be molten slag generated from general waste such as garbage incineration ash, industrial waste, for example, slag generated in the steel manufacturing process, or both of them.

  When an oxidizing agent (“oxide”, hereinafter simply referred to as “oxidizing agent”) is used, examples of the oxidizing agent include phosphoric acid, acetic acid, malic acid, citric acid, ascorbic acid, and benzene. Organic acids such as sulfonic acid and toluenesulfonic acid are used.

  When a pretreatment agent is used, an organic phosphate compound is used as the pretreatment agent.

  Examples of the organic phosphate compound include phosphoric acid, polyphosphoric acid, methylenephosphonic acid, aminomethylenephosphonic acid, nitrilotrismethylenephosphonic acid, hydroxyethanediphosphonic acid, and myo-inositol having 2 to 6 linked phosphoric acids. Phytic acid derivatives such as esters can be mentioned, and the phytic acid derivatives are not particularly limited to the following, but amino group-containing phosphonic acid and phytic acid are particularly preferable.

  The colorant includes an organic pigment and / or an inorganic pigment.

  The organic pigment is not particularly limited to the following cases. For example, an azo chelate pigment, an insoluble azo pigment, a condensed azo pigment, a benzimidazolone pigment, a diketopyrrole pigment, a phthalocyanine pigment Indigo pigments, perinone pigments, dioxane pigments, quinacridone pigments, isoindolinone pigments and the like.

  The inorganic pigment is not particularly limited to the following cases. For example, titanium oxide, zinc oxide, iron oxide, red iron oxide (valve), carbon black, chromium oxide, molybdenum red, cobalt blue. , Manganese violet, bitumen, ultramarine, and the like.

  Moreover, it is desirable that the colorant contains an adhesive.

The adhesive may be a solvent resin adhesive or an aqueous resin adhesive.
The solvent resin adhesive is not particularly limited to the following cases, and examples thereof include acrylic resins, acrylic silicon resins, urethane resins, epoxy resins, alkyd resins, and melamine resins.

  The aqueous resin adhesive is not particularly limited in the following cases, and examples thereof include acrylic resins, acrylic silicon resins, acrylic styrene resins, vinyl acetate resins, and urethane resins.

  The predetermined heating temperature is preferably about 20 ° C. or higher and about 180 ° C. or lower for reasons described later when an oxidizing agent is used.

  Further, when a pretreatment agent is used, the predetermined heating temperature is preferably about 20 ° C. or more and 300 ° C. or less for the reason described later.

  In the case where an oxidizing agent is used, the predetermined heating time is preferably about 3 seconds or longer and 30 minutes or shorter for the reason described later.

  In addition, when the pretreatment agent is used, the predetermined heating time is preferably about 3 seconds or more and 60 minutes or less for the reason described later.

  Next, the reaction process of an example of the manufacturing method of the waste origin colored aggregate which concerns on this invention is demonstrated, referring FIG.

  First, as a raw material, for example, slag is used (S1).

When an oxidizing agent is mixed with this, the surface is chemically treated (S2), and as shown in [Chemical Formula 1], proton ions H ⁺ possessed by the oxidizing agent oxidize by removing negative ions from the raw material surface, and protons are formed on the raw material surface. Charge O + is applied (S3).

次いで、この状態で着色剤が添加される（Ｓ４）。

Next, a colorant is added in this state (S4).

  As a result, if the method for producing a waste-derived colored aggregate according to the present invention is used, the coloring of the colorant to the raw material becomes strong and difficult to fade, and the degree of coloring freedom increases.

  FIG. 2 shows a comparison of fading between a waste-derived colored aggregate produced in accordance with the method for producing a waste-derived colored aggregate according to the present invention (hereinafter referred to as “the present invention product 1”) and a conventional product. The result of a test is shown.

  The conventional product is colored by mixing a coloring raw material with slag.

  As is clear from FIG. 2, it was found that the product 1 of the present invention has about three times the color resistance in the color difference after 3000 hours as compared with the conventional product.

  That is, the product 1 of the present invention has an effect that the durability is superior to the conventional product.

  FIG. 3 shows the result of a concealment rate comparison test between the product 1 of the present invention and the conventional product.

  Here, the specimen 1 is the product 1 of the present invention, and the raw material is slag.

  On the other hand, the test piece 2, the test piece 3 and the test piece 4 are comparative examples, and [Cryosite], [Silica sand], and [Crumbled stone] are used as raw materials in this order.

  In each of the test piece 1, the test piece 2, the test piece 3 and the test piece 4, carbon black is used as the colorant raw material, and aqueous acrylic is used as the adhesive. ing.

  From the result of FIG. 3, when the surface of the raw material was surface-treated using an oxidizing agent in accordance with the method for producing a waste-derived colored aggregate according to the present invention, even if the raw material was slag, the coloring effect was improved. In this respect, it has become clear that the materials are substantially the same as the conventional raw materials [Cryosite], [Silica Sand], and [Crumbled Stone].

  That is, if the method for producing a waste-derived colored aggregate according to the present invention is used, even a waste-derived raw material (for example, slag or molten slag) can be colored. As described above, since the ether bond [—O—] is strong, the degree of coloring freedom is expanded to, for example, white, black, red, yellow, blue, green, and the like.

  In addition, if the method for producing a waste-derived colored aggregate according to the present invention is used, uneven coloring of the colorant on the surface of the raw material is almost eliminated, and the product yield is improved. Applications can be expanded.

  Furthermore, in the method for producing a waste-derived colored aggregate according to the present invention, wastes such as slag and molten slag can be reused as a raw material. Therefore, the method for producing a waste-derived colored aggregate according to the present invention Can contribute to the solution of the waste problem.

  Molten slag was used as a raw material.

The components of the molten slag include SiO _{2 in} the range of 30 wt% to 40 wt%, Al ₂ O _{3 in} the range of 10 wt% to 20 wt%, CaO in the range of 20 wt% to 30 wt%, Fe ₂ O ₃ is in the range of 10 wt% or more and 20 wt% or less, Na ₂ O is in the range of 1 wt% or more and 5 wt% or less, MgO is in the range of 1 wt% or more and 5 wt% or less, and K ₂ O is 1 wt% or more. The range was 5% by weight or less, and other components were in the range of 1% by weight to 5% by weight.

  Next, this raw material was first mixed with an oxidizing agent, and then a colorant (in this example, a quinacridone red pigment and a water-based acrylic resin were used. Then, quinacridone red pigment: aqueous acrylic resin in a 1: 9 ratio was used.

  As for the composition ratio of each material, the raw material (molten slag) was 87 parts by weight, the oxidizing agent was 3 parts by weight, and the colorant was 10 parts by weight.

  Next, this material was tested under the conditions shown in Table 1 (heating time, heating temperature).

表１中、「○」は、着色効果が有ること（「有」）を、また、「×」は、着色効果が無いこと（「無」）を示す。
「着色効果」は、温水試験を行うことにより原料表面の造膜の有無を評価した。
温水試験は、試料を投入し、水を入れた試験管を、沸騰水中に、１０分間入れて、原料表面の着色造膜を剥離するか否かをみた。

In Table 1, “◯” indicates that there is a coloring effect (“Yes”), and “x” indicates that there is no coloring effect (“No”).
“Coloring effect” evaluated the presence or absence of film formation on the surface of the raw material by performing a hot water test.
In the hot water test, a sample was put in, and a test tube containing water was placed in boiling water for 10 minutes to see if the colored film-forming on the raw material surface was peeled off.

  In Table 1, “A” indicates that the adhesive is an aqueous epoxy resin, “B” indicates that the adhesive is a urethane resin, “C” indicates that the adhesive is an acrylic resin, and “D” indicates that the adhesive is bonded. The case where the agent is a vinyl acetate resin is shown.

  From the results in Table 1, it was revealed that when the heating time is 3 seconds, the coloring effect is “present” in the range of the heating temperature from 140 ° C. to 180 ° C.

  Also, from the results in Table 1, when the heating time is 1 minute, the coloring effect is “present” in the temperature range of 120 ° C. or more and 180 ° C. or less, and when the heating time is 5 minutes, When the temperature is 90 ° C. or higher and 180 ° C. or lower, the coloring effect is “Yes”, and when the heating time is 10 minutes, the heating temperature is 60 ° C. or higher and 180 ° C. or lower. When the heating time is 15 minutes, the coloring effect is “present” in the temperature range of 60 ° C. to 180 ° C., and when the heating time is 20 minutes, the heating temperature is 50 ° C. In the temperature range of 180 ° C. or less, the coloring effect is “present”, and when the heating time is 25 minutes, the heating effect is “present” in the temperature range of 30 ° C. or more and 180 ° C. or less, If the heating time is 30 minutes, In the temperature 20 ° C. or higher 180 ° C. the temperature range below, coloring effect is "YES", that is, became clear.

  Next, Table 2 shows the coloring effect on the raw material when the mixing ratio of the oxidizing agent and the coloring agent is changed.

表２中、「○」は、着色効果が有ることを、また、「×」は、着色効果が無いことを示す。

In Table 2, “◯” indicates that there is a coloring effect, and “x” indicates that there is no coloring effect.

  From the results in Table 2, it became clear that the blending ratio of the oxidizing agent to the raw material is preferably in the range of 0.5 wt% to 12 wt%.

  Further, from the results shown in Table 2, it was revealed that the blending ratio of the colorant to the raw material is preferably 0.0% by weight to 3.6% by weight.

  When the blending ratio of the colorant to the raw material is 0% by weight, the raw material has a color unique to slag.

  Next, the reaction process as another example of the manufacturing method of the waste origin colored aggregate by this invention is demonstrated using FIG.

  First, for example, slag is used as a raw material.

  When this is mixed with a pretreatment agent (in this example, an organic phosphate compound), as shown in FIG. 4, the pretreatment agent (in this example, the organic phosphate compound) forms a chelate bond with a hydroxyl group on the slag surface. It is considered that the adhesion and dyeing property (coloring effect) of the colorant are significantly improved.

  Next, this is shown in [Chemical Formula 2] when nitrilotrismethylene sulfonic acid is used as a pretreatment agent (in this example, an organic phosphoric acid compound).

次いで、この状態で着色剤が添加される。

Next, a colorant is added in this state.

  As is clear from FIG. 4 and [Chemical Formula 2], when a pretreatment agent is used, the pretreatment agent (in this example, an organic phosphate compound) forms a chelate bond with a hydroxyl group on the surface of the slag, and adhesion of the colorant It is considered that the property and dyeing property (coloring effect) are remarkably improved.

  As a result, if the method for producing a waste-derived colored aggregate according to the present invention is used, the coloring of the colorant to the raw material becomes strong and difficult to fade, and the degree of coloring freedom increases.

  FIG. 5 shows a comparison of fading between a waste-derived colored aggregate produced according to the method for producing a waste-derived colored aggregate according to the present invention (hereinafter referred to as “the present invention product 2”) and a conventional product. The result of a test is shown.

The conventional product is colored by mixing a coloring raw material with slag.
It has been clarified that the product 2 of the present invention has about three times the color resistance in the color difference after 3000 hours as compared with the conventional product.

  That is, the product 2 of the present invention has an effect that the durability is superior to the conventional product.

  FIG. 6 shows the result of a comparison test of the concealment ratio between the product 2 of the present invention and the conventional product.

  Here, the specimen 5 is a waste-derived colored aggregate according to the present invention, and the raw material is slag.

On the other hand, the test piece 6, the test piece 7, and the test piece 8 are comparative examples, and the raw materials are [Cryosite], [Silica sand], and [Crushed stone] in this order.
In each of the test piece 5, the test piece 6, the test piece 7 and the test piece 8, iron oxide is used as a colorant raw material, and aqueous acrylic is used as an adhesive. ing.

  From the results shown in FIG. 6, when the surface of the raw material was subjected to surface treatment using a pretreatment agent according to the method for producing a waste-derived colored aggregate according to the present invention, the raw material was slag. However, in terms of coloring effect, it has become clear that it is substantially the same as [Cryolite], [Silica sand], and [Crumbled stone], which are conventional raw materials.

  That is, if the method for producing a waste-derived colored aggregate according to the present invention is used, even a waste-derived raw material (for example, slag or molten slag) can be colored. As described above, since the hydroxyl groups and chelate bonds on the surface of the raw material (for example, slag or molten slag) are strong, the degree of coloring freedom is expanded to, for example, white, black, red, yellow, blue, green, etc. The

  In addition, if the method for producing a waste-derived colored aggregate according to the present invention is used, uneven coloring of the colorant on the surface of the raw material is almost eliminated, and the product yield is improved. Applications can be expanded.

  Furthermore, in the method for producing a waste-derived colored aggregate according to the present invention, wastes such as slag and molten slag can be reused as a raw material. Therefore, the method for producing a waste-derived colored aggregate according to the present invention Can contribute to the solution of the waste problem.

  Molten slag was used as a raw material.

The components of the molten slag include SiO _{2 in} the range of 30 wt% to 40 wt%, Al ₂ O _{3 in} the range of 10 wt% to 20 wt%, CaO in the range of 20 wt% to 30 wt%, Fe ₂ O ₃ is in the range of 10 wt% or more and 20 wt% or less, Na ₂ O is in the range of 1 wt% or more and 5 wt% or less, MgO is in the range of 1 wt% or more and 5 wt% or less, and K ₂ O is 1 wt% or more. The range was 5% by weight or less, and other components were in the range of 1% by weight to 5% by weight.

  Next, this raw material was first mixed with an oxidizing agent, and then a colorant (in this example, a white titanium oxide pigment and a water-based acrylic resin were used. In the ratio, white titanium oxide pigment: water-based acrylic resin having a 1: 9 ratio was used).

  The composition ratio of each material was 87 parts by weight of the raw material (molten slag), 5 parts by weight of a 50% aqueous solution of nitrilotrismethylenesulfonic acid as a pretreatment agent, stirring means (in this example, a mixer for stirring) And stirred at 80 ° C. for 5 minutes.

  In this step, generally used dry mixing can be used, and a Henschel mixer, a super mixer, a V blender, or the like can be used.

  Next, 1 part by weight of a colorant (titanium oxide) and 9 parts by weight of an adhesive (aqueous acrylic silicone resin / polydulex G-625) are added to the mixture of molten slag and pretreatment agent prepared by the above process. The mixture was stirred and mixed at 120 ° C. for 10 minutes to obtain 90 parts by weight of white aggregate.

  Next, this material was tested under the conditions shown in Table 3 (heating time, heating temperature).

表３中、「○」は、着色効果が有ること（「有」）を、また、「×」は、着色効果が無いこと（「無」）を示す。

In Table 3, “◯” indicates that there is a coloring effect (“Yes”), and “x” indicates that there is no coloring effect (“No”).

  The “coloring effect” was examined in the same test as in Example 1.

  That is, the “coloring effect” was evaluated by the presence or absence of film formation on the raw material surface by performing a warm water test.

  In the hot water test, a sample was put in, and a test tube containing water was placed in boiling water for 10 minutes to see whether the colored film on the surface of the raw material was peeled off.

  In Table 3, “A” indicates that the adhesive is an aqueous epoxy resin, “B” indicates that the adhesive is a urethane resin, “C” indicates that the adhesive is an acrylic resin, and “D” indicates that the adhesive is bonded. The case where the agent is a vinyl acetate resin is shown.

  From the results of Table 3, it was revealed that when the heating time was 3 seconds, the coloring effect was “present” in the temperature range of 140 ° C. or higher and 180 ° C. or lower.

  Further, from the results of Table 3, when the heating time is 1 minute, the coloring effect is “present” in the temperature range of 80 ° C. to 180 ° C., and when the heating time is 5 minutes, The coloring effect is “present” in the temperature range of 70 ° C. to 180 ° C., and when the heating time is 10 minutes, the coloring effect is “present” in the temperature range of 70 ° C. to 180 ° C. When the heating time is 15 minutes, the coloring effect is “present” in the temperature range of 70 ° C. to 180 ° C., and when the heating time is 20 minutes, the heating temperature is 50 ° C. In the temperature range of 180 ° C. or less, the coloring effect is “present”, and when the heating time is 25 minutes, the heating effect is “present” in the temperature range of 30 ° C. or more and 180 ° C. or less, When the heating time is 30 minutes, Degree is in the temperature range of 20 ° C. or higher 180 ° C. or less, the coloring effect is "Yes", it means that, revealed.

  In addition, after mixing a pretreatment agent with a raw material by experiment, after performing a heat treatment at a temperature of about 50 ° C. to 90 ° C. for about 1 minute to 15 minutes, a colorant is added, and then It has been clarified that the coloring effect is “present” even when the heat treatment is performed for 3 seconds to 60 minutes in a temperature range of about 20 ° C. to about 300 ° C.

  Next, Table 4 shows the coloring effect on the raw material when the mixing ratio of the oxidizing agent and the coloring agent is changed.

表４中、「○」は、着色効果が有ることを、また、「×」は、着色効果が無いことを示す。

In Table 4, “◯” indicates that there is a coloring effect, and “x” indicates that there is no coloring effect.

  From the results of Table 4, the pretreatment agent (in this example, the organic phosphate compound) is added to the raw material in an amount of 0.5 wt% or more and 5 wt% or less, and 1 wt% or more and 3 wt%. It has become clear that this is more preferable.

  In addition, when the addition amount with respect to the raw material of a pretreatment agent (in this example, an organic phosphate compound) is less than 0.5%, the adhesion effect of the colorant cannot be obtained, and the pretreatment agent (in this example) Even if the amount of the organic phosphate compound) added to the raw material exceeds 5% by weight, the adhesion promoting effect of the colorant cannot be expected to be further remarkable. It became clear that it would decrease.

  Note that the above-described embodiments of the present invention are all used for explaining the present invention, and it is needless to say that the present invention is not limited to the above-described embodiments of the present invention.

The present invention can be utilized for waste disposal or reuse of waste.

It is a reaction process figure explaining the coloring mechanism of the manufacturing method of the waste origin colored aggregate concerning this invention. It is a figure which shows the comparative test of the fading property by the waste origin coloring aggregate concerning this invention, and a conventional product. It is a figure which shows the comparative test of the fading property of the concealment rate by the waste origin colored aggregate concerning this invention, and a conventional product. It is a reaction process figure explaining the coloring mechanism of the other example of the manufacturing method of the waste origin colored aggregate concerning this invention. It is a figure which shows the comparative test of the fading property by the waste-derived colored aggregate concerning other examples of this invention, and a conventional product. It is a figure which shows the comparative test of the fading property of the concealment rate by the waste-derived colored aggregate concerning other examples of this invention, and a conventional product.

Claims (13)

A method for producing a waste-derived colored aggregate, comprising a step of mixing an oxidant with a raw material, then adding a colorant, and processing at a predetermined heating temperature and a predetermined heating time. The manufacturing method of the waste origin colored aggregate of Claim 1 in which the said oxidizing agent contains an organic acid. A method for producing a waste-derived colored aggregate, comprising a step of mixing a pretreatment agent with a raw material, then adding a colorant, and processing at a predetermined heating temperature and a predetermined heating time. The method for producing a waste-derived colored aggregate according to claim 3, wherein the pretreatment agent contains an organic phosphate compound. The manufacturing method of the waste origin colored aggregate in any one of Claims 1-4 in which the said raw material contains molten slag. The method for producing a waste-derived colored aggregate according to any one of claims 1 to 5, wherein the raw material contains slag. The method for producing a waste-derived colored aggregate according to any one of claims 1 to 6, wherein the colorant contains an adhesive. The method for producing a waste-derived colored aggregate according to claim 7, wherein the adhesive includes a solvent resin-based adhesive. The method for producing a waste-derived colored aggregate according to claim 7, wherein the adhesive includes an aqueous resin adhesive. The method for producing a waste-derived colored aggregate according to any one of claims 1 to 9, wherein the colorant contains an organic pigment. The manufacturing method of the waste origin colored aggregate in any one of Claims 1-10 in which the said coloring agent contains an inorganic pigment. The method for producing a waste-derived colored aggregate according to any one of claims 1 to 11, wherein the predetermined heating temperature is about 20 ° C or higher and about 300 ° C or lower. The method for producing a waste-derived colored aggregate according to any one of claims 1 to 12, wherein the predetermined heating time is about 3 seconds or more and about 60 minutes or less.

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