JP2010083721A - Method for storing granulate or powdery object to be stored - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a storage method by which an article having high strength and not broken even if it is processed into a small size can be obtained without causing cavities at the inside, and holes, recesses and a depression state in the surface of an artificial crystal stone, and cracks at the inside or in the surface of the whole body, and which is also suitably used for storing radioactive substances and other harmful substances at a low cost. <P>SOLUTION: The storage method includes enclosing an object to be stored in an artificial crystal stone by mixing the object to be stored, a material containing SiO<SB>2</SB>as a main component, and a crystallization accelerator such as an oxide containing any of Ca, Li, Na, K and B, then melting the resulting mixture, inpouring the obtained melt into a mold, cooling or naturally cooling the melt while performing temperature control, after forming a solidified glass body which is solidified in such a state that nearly all of the glass body is amorphous glass, raising the temperature of the solidified glass body to a prescribed temperature not higher than the fluidizing temperature at a relatively slow rate of &le;600&deg;C/h, so as to convert the solidified glass body into the artificial crystal stone in an artificial stone state comprising a polycrystalline material in which a network of fine crystals is formed or in a mixed state of the artificial stone state and a glass state. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a method for preserving granular or powdery preservation objects that can be suitably used for preserving incineration residues mainly composed of calcium phosphate, or radioactive substances and other harmful substances that remain after incineration of humans or animals. It is about.

  As a method of memorializing deceased people and pets, it is common to decorate them with a photo taken before life in a photo frame, but some of the remains or bone ash attached to the cremation are made of stone. Sometimes it is stored in a wooden storage box and placed in a room. In addition, as described in Patent Documents 1 and 2, there is a method of using a cremation human bone ash or pet animal bone ash mixed with concrete and hardened, or a method using a material mixed with ceramic clay and sintered. is there. In addition, there is an “eternal plate” in which a human bone ash or pet animal bone ash that has been cremation is pressure-molded into a plate shape and sintered using a metal oxide as a sintering aid. Alternatively, there is a method using the one described in Patent Documents 3 and 4 in which a human bone ash or pet animal bone ash that has been cremated is mixed with a glass raw material, heated and melted, and molded into a predetermined glass product.

  However, the above storage box stores the remains as they are, and is not suitable as an indoor ornament. In addition, cremation of human bone ash or pet animal bone ash mixed with concrete and cured, or those mixed with ceramic clay and sintered, human bone ash and pet animal bone ash itself are not altered at all. Since it remains in the state, it is close to storing the remains as it is, and it is not appropriate as an indoor ornament. Further, since the “eternal plate” is a pressure-molded sintered product, only a plate-like material can be produced. In addition, since this “eternal plate” is a sintered product, its impact resistance is fragile and it is highly likely to be damaged by dropping or the like. In addition, crushed burned bone of human bone ash or pet animals mixed with glass raw material, heated and melted to be molded into a predetermined glass product is easy to break because it is made of glass. A glass is a man-made material, and it cannot be denied that it does not match the image of the remains.

  On the other hand, the present applicant has already proposed a method for producing an artificial crystal stone by adding a melting point depressant and gradually cooling the melt while controlling the temperature to produce and grow a mineral crystal ( (See Patent Document 5). According to this method, it can be solidified into an artificial stone state (polycrystalline body) or a mixed state of the artificial stone state (polycrystalline body) and a glass state (amorphous body), like glass or eternal plate. It is possible to provide an artificial crystal stone containing a remains that is not easily broken and is suitable as an indoor ornament and hardly causes a discomfort to the image of the remains. In other words, the artificial crystal stone with ashes produced by this method expresses the beauty of coloration, such as the beauty of natural modeling due to the cavities formed inside, the depressions and depressions of the surface, and the shade of the color of the crystalline and non-crystalline parts. Artificial crystal stones that are excellent as objects and figurines are made.

  However, although the appearance of the artificial crystal stone of Patent Document 5 is unique and can be evaluated, when it is made into a small artificial crystal stone such as accessories, the cavity inside the artificial crystal stone, the surface hole / dent / recessed state, the inside of the whole In addition, there is a risk that the small artificial crystal stone may be damaged in some cases, and the use is often limited such that it cannot be processed into a small size. That is, since individual crystals grow large irregularly, the grain surface of the crystal becomes large and flat, or the surface of the artificial crystal stone may show holes, dents, or depressions. In such a large crystal, the individual single crystals themselves have strength, but the adhesion between the crystals becomes weak, and the overall strength is lowered. Further, due to the difference in crystallization speed or the uneven distribution inside the melt, cavities that were not in the melted state may be generated inside, or the surface may show holes, dents, or depressions. Furthermore, the difference in the crystallization rate causes internal stress to the whole, and may cause cracks in the artificial stone state (polycrystalline body) and the glass state (amorphous body) as a whole. Furthermore, in the mixed state of the artificial stone state (polycrystal) and the glass state (amorphous body), the artificial crystal is derived from the difference between the thermal expansion coefficient of the resulting crystal body and the thermal expansion coefficient of the glass state (amorphous body). Cracks may also occur in the interior and surface of the entire stone. These cavities inside the artificial crystal stone, surface holes, dents, and depressions, and cracks generated inside and on the surface also cause the strength of the artificial crystal stone to decrease.

  On the other hand, it is especially used as a technology to isolate radioactive substances and other harmful substances from the environment, such as harmful inorganic substances and radioactive substances that do not crystallize, and harmful substances contained in sludge such as sewage treatment, and to make it difficult to diffuse into the environment. For high-level radioactive waste remaining after fuel reprocessing, the waste liquid and the glass raw material are mixed and dissolved at a high temperature to evaporate water in the waste liquid, and then in a stainless steel container (canister). Although cooling and solidification technology is used, glass has the drawback of being easy to break. On the other hand, as a method of solidifying waste with synthetic rocks composed of a stable mineral phase of titanate modeled on natural minerals, the radionuclides contained in the waste liquid are distributed as the main component or subcomponent in the crystal structure. In order to distribute the radionuclide to the main components in the crystal structure in this way, strict control of the manufacturing process is required, although a ceramic solidification method (typically a SYNROC solidification method) has been studied. It is necessary and expensive, and there is a concern about the influence on the crystal body due to the nuclear conversion of the incorporated nuclide.

JP-A-9-300896 Japanese Patent Laid-Open No. 9-308661 JP 2000-79798 A JP 2000-109338 A JP 2004-167135 A

  Therefore, in view of the above-mentioned situation, the present invention aims to solve an artificial stone that is not easily broken like glass and eternal plates, is suitable as an indoor ornament, and is less likely to cause an image and a sense of discomfort. A method for preserving granular or powdery storage objects to be solidified into a state (polycrystalline body) or a mixed state of the artificial stone state (polycrystalline body) and a glass state (amorphous body). Internal cavities, surface holes, dents, and depressions, no cracks in the entire interior and surface, high strength that does not break even when processed to a small size, radioactive material An object of the present invention is to provide a method for preserving an artificial crystal stone that can be suitably used for preserving other harmful substances without incurring costs.

That is, the present invention provides a granular or powdery storage object, oxides, carbonates comprising a material composed mainly of _{SiO 2, Ca, Li, Na} , K, and either B or hydroxide, Alternatively, a crystallization accelerator composed of a combination of these is mixed, and a melt obtained by melting the mixture by pouring is poured into a mold. The glass solidified body is cooled or naturally cooled while controlling the temperature at a speed that is generated to form a glass solidified body almost solidified into an amorphous glass state, and then the glass solidified body is further heated to 600 ° C. per hour. The temperature is raised to a predetermined temperature below the fluidization temperature at a relatively slow speed as described below, and an artificial stone state composed of a polycrystalline body in which a fine crystal network is formed, or a mixed state of the artificial stone state and the glass state is obtained. Change to artificial crystal stone Provides a method of storing granular or powdery stored object is characterized by comprising encapsulates the stored object in the artificial crystal in stone.

  Moreover, it is preferable to cool the vitrified body in the mold to room temperature.

  Further, when the vitrified body is cooled to a temperature higher than room temperature in the mold, the cooled vitrified body is placed in a furnace preheated to the temperature, and the temperature is raised to the predetermined temperature. Is preferred.

The mixture of SiO ₂ component of the material mainly composed of SiO ₂ 10% by weight or more, the storage object 80 wt% or less, and a crystallization accelerator to contain 5 wt% or more in terms of oxide preferably, in particular, the SiO ₂ component of the material mainly composed of SiO ₂ 70-75 [wt%, as stored objects about 10 wt%, and a crystallization accelerator contains 15 to 20 wt% in terms of oxide More preferably.

  Further, the mixture further includes at least one of Ti, Zn, Fe, Mn, Co, Sr, Cu, Ni, Cd, Te, Se, V, Pr, Cr, Ca, Nd, Er, S, and Mo. It is preferable to add a color former comprising an oxide or carbonate containing it, or a ceramic pigment.

  Further, the storage object may be an incineration residue mainly composed of calcium phosphate remaining after incineration of humans or animals, or a radioactive substance or other harmful substances.

The material mainly containing SiO ₂ is preferably SiO _2, is a combination of glass, or mineral SiO ₂ as a main component, or two or more types thereof.

  Moreover, it is preferable that the artificial crystal stone containing the storage object is embedded, inserted, fitted, or attached to an object such as an ornament.

According to the present invention as described above, for example, an incineration residue mainly composed of Ca ₃ (PO ₄ ) ₂ (calcium phosphate) (liquid phase temperature 1670 ° C.) remaining after incineration of humans or animals, and SiO ₂ (oxidation) Silicon) (liquid phase temperature 1610 ° C.) can be produced in a glass having a liquid phase temperature of 1000 ° C. or less, and can be easily formed into various shapes while being stored in the glass state. In addition, due to this, the incineration residue becomes amorphous and is not solid, that is, it is built in and stored in the glass body in an invisible state, for example, a method for preserving burned bone or the like without the bone shape Specifically, it can have a function as a glass accessory (bracelet, ring, etc.), a glass figurine, or a glass grave.

  Further, after mixing the crystallization accelerator and forming the vitrified body, the vitrified body is further heated to a predetermined temperature below the fluidization temperature at a relatively slow rate of 600 ° C. or less per hour. The artificial crystal is made of a polycrystal formed with a fine crystal network, or an artificial crystal stone that is a mixture of the artificial stone state and the glass state, and the storage object is placed in the artificial crystal stone. In the case of containment, once the solidified glass is cooled and solidified, it contains all the components and is homogeneous. By gradually raising the temperature while controlling the temperature again, crystallization occurs frequently in the homogeneous solidified glass. Start and grow. And, unlike the case of the above-mentioned Patent Document 5 in which individual crystals that grow are crystallized when solidified from a liquid state, the movement of each crystal generated is limited due to softening and crystallization from the solidified state, Therefore, an artificial stone state (polycrystalline body) consisting of a network of innumerable crystalline bodies (fine crystals) of a size that cannot be visually recognized, or the artificial stone state (polycrystalline body) and the glass state (amorphous body). A mixed state is generated. This is different from that of Patent Document 5 described above, and there is no void inside the artificial crystal stone, no surface hole / dimple / depressed state, no cracks in the whole and on the surface, and the generated artificial crystal stone has a homogeneous degree Therefore, even if processed to a small size, it is not damaged and can be excellent in strength. In addition, radioactive materials and other harmful substances are confined by a network of fine crystals with high strength, toughness, and chemical stability. These substances can be stored firmly and stably without being applied.

  Next, the preservation | save method based on embodiment of this invention is demonstrated in detail based on FIGS.

In the following description, a crystalline artificial stone (artificial crystal stone) is produced by forming a fine crystal network from a raw material mainly composed of SiO ₂ and enclosing it in a crystalline substance or an amorphous substance. Although the preserving method in the artificial crystal stone will be described, the step of producing the crystalline artificial stone may be omitted to obtain a vitrified state. In this case, it is preferable to add Al ₂ O ₃ , NaO, ZrO ₂ , MgO, CaO, SrO, Li ₂ O, K ₂ O or the like having an effect of increasing the glass strength or lowering the liquidus temperature to the mixture. It is also desirable to improve the decorativeness by adding CoO, MuO, Cr, Er ₂ O ₃ (erbium), Fe ₂ O ₃ , Ti ₂ O or the like as a colorant for glass.

In this embodiment, specifically, a granular or powdery object to be stored is mixed with a material mainly composed of SiO ₂ and a specific crystallization accelerator, and then subjected to a fine heat treatment through a special heat treatment process. Artificial crystal stone which is changed into an artificial crystal stone composed of a polycrystal having a network of the above, or an artificial crystal stone which is a mixed state of the artificial stone state and a glass state, and encloses the storage object inside This is an internal preservation method that contains and isolates harmful substances and radioactive substances inside, isolates them from spreading into the environment, and seals burned bones inside to help heal the hearts of related bereaved family members as a permanent keepsake. Can be expected.

  Hereinafter, the method for preserving the artificial crystal stone according to the present embodiment will be described in detail along the processing procedure shown in FIG.

First, a material (inorganic material, for example, an oxide) mainly composed of SiO ₂ as a raw material for crystals of artificial crystal stone and a crystallization accelerator are pulverized into a powder form to form a mixture ( S1). Examples of the inorganic materials can be used, for example glass, mineral SiO _2, glass, a SiO ₂ granite, or the like as its main component (rock), sewage sludge incineration ash, sewage sludge slag, or two or more of these combinations It is also preferable to use a combination of marble and serpentine. Granite is particularly easy to handle. As the glass, quartz, quartz (SiO ₂ : 100%), soda-lime glass, borosilicate glass, lead glass, fluoride glass, or a combination thereof can be used.

The crystallization accelerator is preferably an oxide, carbonate, hydroxide, or a combination thereof containing any of Ca, Li, Na, K, and B. For example, B ₂ O ₃ Na ₂ CO ₃ , CaO, Na ₂ O, Li ₂ O, CaCO ₃ , Ca (OH) ₂ , NaOH, and the like can be used. These are generally known as melting point lowering materials.

  Next, a color former is added to the mixture and mixed (S2). As the color former, an oxidation containing at least one of Ti, Zn, Fe, Mn, Co, Sr, Cu, Ni, Cd, Te, Se, V, Pr, Cr, Ca, Nd, Er, S, and Mo. A material, carbonate, or a ceramic pigment is preferable. For example, CoO can be used. If the amount of the color former is too large, a beautiful color is not developed. Therefore, the amount is preferably 15% by weight or less of the entire mixture, and sufficient color development can be obtained even at 5% by weight or less. Moreover, it can also color using microparticles | fine-particles, such as gold | metal | money, silver, platinum, copper, and palladium. In particular, gold is effective for red coloration and silver is effective for yellow coloration.

Next, as a granular or powdery preservation object, for example, incineration residue mainly composed of Ca ₃ (PO ₄ ) ₂ (calcium phosphate) remaining as a main component, or harmful substances and radioactive substances. Powders such as substances are added and the whole is mixed (S3). The incineration residue can be performed on, for example, cremation of human bone ash, but it can also be handled in the same manner for pet animal bone ash. Further, as a storage object, a part of a human body that has left the human body such as hair and nails, or a part of a pet animal body such as feathers that has left the pet animal body can be dealt with in the same manner. In this case, hair or nails collected from the human body before cremation before birth or after death, or feathers collected from the companion animal body and removed from the companion animal body are used. These hair, nails, feathers, etc., decompose and evaporate their organic components by heating, and the trace amount of inorganic components contained in these changes to oxides, which are oxides mainly composed of molten SiO ₂ And melted together with crystallization accelerators and coloring additives.

  When the amount of bone ash is relatively large, the above mixture is further mixed with a melting point lowering additive composed of borax, glass, lead, or silica, or a combination thereof to facilitate melting of the mixture containing calcium phosphate. It is preferable. Depending on the type of rock or glass to be mixed, the mixing ratio, the mixing ratio of bone ash, etc., these melting point lowering additives are omitted.

In the above mixture, the SiO ₂ component of the material mainly composed of SiO ₂ is 10% by weight or more, the storage object is 80% by weight or less, the crystallization accelerator is 5% by weight or more in terms of oxide, and the color former is 15%. It is preferable to set the blending ratio to not more than% by weight. In particular, in order to have strength and beautiful luster as a stone, preferably, the SiO ₂ component is about 70 to 75% by weight, calcium phosphate as a storage object is about 10% by weight, and the crystallization accelerator is 15 to 15%. About 20% by weight, the color former is set to about 0 to 5% by weight, or in the case of plate glass, about 70 to 80% by weight, and calcium phosphate as a storage object is crystallized to about 10% by weight. It is preferable to set the accelerator to about 10 to 15% by weight and the color former to about 0 to 5% by weight.

Next, the above mixture is heated using a PID-controlled electric furnace until all components such as SiO ₂ and calcium phosphate are melted (S4). The melting temperature is 500 to 1800 ° C., preferably about 800 to 1500 ° C., more preferably 1000 to 1300 ° C., depending on the material and its blending. In addition, after injecting a high temperature melt into a normal temperature mold, cracks may occur in the injection material, so the mold used in the next step may be preheated.

  Next, the melt is poured into the mold and cast (S5). As long as nonflammability and heat resistance are ensured, the material and shape of the mold are not limited. However, in order to effectively use the material, a viscous melt that can be cast is poured into a mold close to the final shape. . In this example, a mold for casting the disk-shaped molded body shown in FIG. 2A is used, but the shape of the molded body is not particularly limited. For example, a conical shape as shown in FIG. As shown in (b), the shape of a cube or the like, or a shape that can be cast, such as a cylinder, a triangular pyramid, a polygonal pyramid, a triangular frustum, a polygonal frustum, a teardrop, a jade, a heart shape, a rectangular parallelepiped, etc. Any shape may be used.

  Next, mold at room temperature, or, if preheating is required, remove the mold in the heating furnace or out of the heating furnace, and the molten metal in the mold will be partially cooled or faster than the rate at which crystallization does not start. Alternatively, even when a part of the crystal is crystallized, it is cooled at a speed higher than the speed at which a fine crystal is partly formed, or is cooled while being controlled by temperature, or is naturally cooled, so that almost the whole of the melt is undisturbed. A vitrified glass solidified into a crystalline glass state is formed (S6). The cooling temperature is set to be at least a low temperature or a normal temperature from the rising temperature in the reheating step (S7) described later.

Next, the cooled vitrified body is again cooled at a predetermined slow rate, specifically 600 ° C./hour so that a fine crystal network mainly composed of SiO ₂ and SiO ₂ compound is formed. Hereinafter, the temperature is raised to a predetermined temperature at a rate of temperature rise of preferably 400 ° C./hour or less, more preferably 200 ° C./hour or less (S7). When cooling the vitrified body in the mold to a temperature higher than room temperature, the vitrified body after cooling is put in a furnace preheated to the temperature, and the temperature is raised to the predetermined temperature. At this time, the molded body may be heated in the furnace together with the mold without being removed from the mold, or may be heated in the furnace after being removed from the mold.

  The heating rate at the time of reheating is one of the most important factors in the present invention in order to melt the vitrified glass once solidified into a glass state to form an artificial stone-shaped molded body. When the temperature raising rate is set to be faster than 600 ° C./hour, crystallization is not sufficiently caused, and the molded product obtained by cooling after heating occupies the majority of the original glass state. However, since a melting point depressant is required at a temperature rising rate close to 600 ° C./hour, and this melting point depressant causes a decrease in yield, the temperature is preferably set to 400 ° C./hour or less. It is desirable to stop the heating temperature at a temperature near or slightly lower than the temperature at which it begins to soften and have fluidity so that the shape of the vitrified body can be maintained. It is preferable that the temperature is as low as several tens of degrees Celsius.

  That is, the present invention does not gradually crystallize by gradually cooling from a high temperature as in the method described in Patent Document 5, but instead temporarily solidifies into a glass body (amorphous) by natural heat dissipation or rapid cooling, and the glass solidified body. If the temperature of the glass becomes below the temperature range where crystallization starts to normal temperature, the vitrified body is put into the furnace again, and this time, the vitrified body is heated at a relatively slow heating rate, and the vitrified body is slightly fluid. By heating to the following, an artificial stone state (polycrystalline body) consisting of a network of innumerable crystalline bodies (fine crystals) or a mixed state of the artificial stone state (polycrystalline body) and glass state (amorphous body) It is something to grow. The artificial stone state (polycrystalline body), or the mixing ratio of the artificial stone state (polycrystalline body) and the glass state (amorphous body) can be controlled by adjusting the combination of the compositions and the heating rate during reheating.

  And after making a molded object crystallize by reheating as mentioned above, a molded object is cooled again and it completes (S8). The finished molded product may be left as it is, but by polishing it, the surface can be further glossed and the appearance can be further improved (S9). Moreover, in this example, in order to comprise a pendant, the molded object is drilled. In addition, as shown in FIG. 4 (a), the molded body is formed into a thin rod shape, and an elongated hole is formed in the molded body such as a resin cone, and then inserted into the hole. May be. For example, it is possible to manufacture a vase made of natural stone such as marble or a piece of a figurine equipped with a watch, by making a long and narrow hole and inserting a thin rod-shaped molded body into the hole. The three can also be made apparent that the melt containing human bone ash is not stored. Or, for example, the shape of the molded body is a cube as shown in FIG. 3 (b), and a recess is provided on the top of a resin trapezoidal figurine as shown in FIG. 4 (a). You may make it insert this cube-shaped body in. Alternatively, the molded body may be embedded in, inserted into, or inserted into the surface of a tower, a Buddha statue, etc. made of natural materials such as resin, wood, casket, etc. , You may paste. In the case of storing radioactive substances and other harmful substances, a container made of stainless steel or the like may be used instead of the above-mentioned mold, heated without taking out from the container, and stored without taking out as it is.

  Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and can of course be implemented in various forms without departing from the gist of the present invention.

  Next, the results of a strength test performed on a sample (Example) of a molded body prepared by the method for preserving an artificial crystal stone according to the present invention will be described.

sample,
Raw material: Glass Crystal of SiO ₂ and SiO ₂ compound Crystallization accelerator: Boron oxide, sodium carbonate, potassium carbonate, lithium carbonate Color developing agent; Cobalt oxide Heating and melting temperature: 1300 ° C
Cooling: Natural cooling to room temperature Reheating: Molded by heating to 800 ° C. at a rate of temperature increase of 200 ° C./hour.

  And as a result of performing the 3 point | piece bending strength test based on JISR1601, about the said sample, the intensity | strength of about 90-130 MPa was obtained in any part. This strength is approximately three times as high as 10-40 MPa of granite (granite), which is a typical natural stone, and 5-25 MPa of marble. Thereby, it has confirmed that the molded object created by this invention was high intensity | strength uniformly in any part. In addition, the artificial stone created by the conventional method by the management cooling (the method described in Patent Document 5) can take a test piece that is homogeneous in appearance when making a three-point bending strength test piece in accordance with JIS R 1601. The bending strength test was not performed because the strength was clearly inferior because there was no crack and cracks often entered the test piece.

The flowchart which shows the procedure of the preservation | save method which concerns on typical embodiment of this invention. (A) is explanatory drawing which shows the molded object similarly formed by the preservation | save method which concerns on typical embodiment, (b) is explanatory drawing which shows the example which further processed this molded object and comprised as a pendant. (A), (b) is explanatory drawing which shows the other example of the molded object similarly formed by the preservation | save method which concerns on typical embodiment. (A), (b) is explanatory drawing which shows the example which inserted or fitted to the other object the molded object similarly formed by the preservation | save method which concerns on typical embodiment.

Explanation of symbols

1-5 Molded body 11, 12 Other objects

Claims (9)

From a granular or powder storage object, a material mainly composed of SiO ₂ , and an oxide, carbonate, or hydroxide containing any of Ca, Li, Na, K, and B, or a combination thereof With a crystallization accelerator,
Pouring a melt of the mixture with heat into a mold;
Even if crystallization does not start or partially crystallizes, it is cooled or naturally cooled while controlling the temperature at such a rate that fine crystals are partially formed, and almost completely solidifies into an amorphous glass state. After forming the glass vitrified body,
Further, the vitrified body is heated to a predetermined temperature below the fluidization temperature at a relatively slow rate of 600 ° C. or less per hour, and is in an artificial stone state comprising a polycrystalline body in which a fine crystal network is formed, or A method for preserving a granular or powdery preservation object obtained by changing the artificial crystal stone into a mixed state of an artificial stone state and a glass state, and enclosing the preservation object in the artificial crystal stone.   The method for preserving a granular or powdery preservation object according to claim 1, wherein cooling of the vitrified body in the mold is performed by cooling to normal temperature.   When cooling the vitrified body in the mold to a temperature higher than room temperature, the cooled vitrified body is placed in a furnace preheated to the temperature, and the temperature is raised to the predetermined temperature. Item 3. A method for storing a granular or powdery storage object according to Item 1 or 2. Claim wherein said mixture, comprising the SiO ₂ component of the material mainly composed of SiO ₂ 10% by weight or more, the storage object 80 wt% or less, and the crystallization accelerator contains 5 wt% or more in terms of oxide The preservation | save method of the granular or powdery preservation | save object of any one of 1-3. Wherein the mixture, the SiO ₂ component of the material mainly composed of SiO ₂ 70-75 [wt%, as stored objects about 10 wt%, and a crystallization accelerator contains 15 to 20 wt% in terms of oxide The storage method of the granular or powder-like preservation target object according to any one of claims 1 to 4.   The mixture further contains at least one of Ti, Zn, Fe, Mn, Co, Sr, Cu, Ni, Cd, Te, Se, V, Pr, Cr, Ca, Nd, Er, S, and Mo. A method for preserving a granular or powdery preservation object according to any one of claims 1 to 5, wherein a coloring agent comprising a product, carbonate, or ceramic pigment is added.   The granular or powder according to any one of claims 1 to 6, wherein the preservation object is an incineration residue mainly composed of calcium phosphate remaining after incineration of a person or an animal, or a radioactive substance or other harmful substances. To save the object to be stored. 8. The material according to claim 1, wherein the material containing SiO ₂ as a main component is made of SiO ₂ , glass, mineral containing SiO ₂ as a main component, or a combination of two or more thereof. A method for storing granular or powdery objects to be stored.   The granular or powdered preservation object according to any one of claims 1 to 8, wherein the artificial crystal stone containing the preservation object is embedded, inserted, fitted, or attached to an object such as an ornament. How to save.

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