JP2012193082A - Filler for glass production container, filler layer for glass production container, device for producing glass, and method for manufacturing device for producing glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filler from which filler slurry is prepared, the slurry being excellent in fluidity when charged, hardened in a short time after charged, and dried in a short time after charged, too.SOLUTION: The filler for a glass production container is charged between a glass production container 10, which is made of a noble metal, and a base material 30. The filler for a glass production container contains glass powder, aggregate having a particle size of 0.2 mm or larger, ceramic powder, and a hydraulic substance which contains an alkaline earth oxide.

Description

  The present invention relates to a filler for glass production containers, a filler layer for glass production containers formed by firing the glass, a glass production apparatus provided with the filler, and a method for producing the glass production apparatus.

  Conventionally, as a glass production container for producing high-quality glass such as optical glass and display glass, a glass production container made of a noble metal such as Pt or an alloy containing a noble metal (hereinafter referred to as “Pt container”). Is widely used. The reason is that the Pt container has high rigidity even in a high temperature atmosphere of 1000 ° C. or higher and hardly contaminates the internal glass. In addition, the container for glass manufacture is normally fixed by the outer side being covered with the support material which consists of refractories, and a filler being filled and solidified in the space | gap of the container for glass manufacture and a support material.

For example, in the following Patent Document 1, an alumina castable whose content of Al ₂ O ₃ and SiO ₂ is 97% by weight or more is used as a filler filled in a gap between a Pt container and a support material. Is described.

JP 2010-228942 A

  When the filler slurry is prepared using the alumina castable described in Patent Document 1 as a filler, the amount of liquid contained in the filler slurry is reduced in order to reduce the viscosity of the filler slurry to such an extent that even a small gap can be filled. If it increases, there exists a problem that time required for a filler slurry to dry and to harden will become long. For this reason, for example, when a narrow portion and a wide portion exist in the gap between the Pt container and the support material, if a filler slurry with a low liquid content is used, the narrow portion is used. On the other hand, if a filler slurry with a high liquid content cannot be filled reliably, the filler is filled in the narrow part, but the filler slurry filled in the wide part is dried. It takes a long time to cure, and the shrinkage after drying increases.

  The present invention has been made in view of such points, and its purpose is to have excellent fluidity at the time of filling, while the time to cure after filling is short and the time to dry. Another object of the present invention is to provide a filler capable of producing a short filler slurry.

  The filler for glass manufacturing containers which concerns on this invention is a filler with which it fills between the glass manufacturing container made from a noble metal, and a support material. The filler for glass manufacturing containers which concerns on this invention contains glass powder, the aggregate whose particle diameter is 0.2 mm or more, ceramic powder, and a hydraulic substance. The hydraulic substance contains an alkaline earth oxide.

  In the present invention, “ceramic powder” refers to those having a particle size of less than 0.2 mm.

  It is preferable that content of a hydraulic substance is 0.1-3 mass parts with respect to 100 mass parts of inorganic powder which consists of glass powder, an aggregate, and a ceramic powder in conversion to alkaline-earth oxide.

  In the inorganic powder composed of glass powder, aggregate and ceramic powder, the content of glass powder is preferably 5% by mass to 35% by mass.

  In the inorganic powder, the aggregate content is preferably 40% by mass to 90% by mass.

  In the inorganic powder, the content of the ceramic powder is preferably 4% by mass to 30% by mass.

  The hydraulic substance is preferably at least one selected from the group consisting of calcium aluminate compounds, calcium silicate compounds, and barium aluminate compounds.

  The aggregate preferably includes at least one of mullite particles, alumina particles, and silica particles.

  It is preferable that the filler for glass manufacturing containers contains the alumina particle which has a particle diameter in the range of 1 micrometer-50 micrometers as ceramic powder.

  It is preferable that the filler for glass manufacturing containers contains the silica particle which has a particle diameter in the range of 1 micrometer-100 micrometers as ceramic powder.

  It is preferable that the filler for glass manufacturing containers further contains a peptizer.

  The filler layer for glass production containers according to the present invention is obtained by firing the filler for glass production containers according to the present invention.

  The glass manufacturing apparatus which concerns on this invention is equipped with the filler layer for glass manufacturing containers which concerns on the said invention, the glass manufacturing container made from a noble metal, and a support material. The filler layer for glass production containers is filled between the glass production container and the support material.

  The manufacturing method of the glass manufacturing apparatus which concerns on this invention is related with the manufacturing method of the glass manufacturing apparatus which concerns on the said this invention. In the manufacturing method of the glass manufacturing apparatus according to the present invention, the glass powder, the aggregate having a particle diameter of 0.2 mm or more, the ceramic powder, and the alkaline earth oxidation are formed in the gap between the support material and the glass manufacturing container. A filler slurry obtained by adding a dispersion medium to a filler containing a hydraulic substance containing a product is filled. Dry the filler slurry. By firing the dried filler slurry, a filler layer for a glass production container is formed.

  In the present invention, the “glass production container” refers to a member having an inner surface in contact with the glass melt and an outer surface not in contact with the glass melt and capable of holding or transporting the glass melt. . The “glass production container” includes a container capable of holding a glass melt such as a melting tank, a clarification tank, and a stirring tank, a glass transport pipe capable of transporting the glass melt, and a molding member. Here, the “forming member” refers to a member used for forming a glass melt into a predetermined shape. Accordingly, the “molding member” includes a molding sleeve, a nozzle, and the like.

  In the present invention, “a glass production container made of noble metal” refers to a glass production container made of a noble metal or an alloy containing a noble metal. Specific examples of the noble metal include Pt, Rh, Ir, Pd, Au and the like. Examples of the alloy containing a noble metal include an alloy containing one or more selected from the group consisting of Pt, Rh, Ir, Pd and Au. Specific examples of alloys containing noble metals include Pt / Rh alloys, Pt / Ir alloys, and Pt / Pd alloys.

  The “support material” is a member for supporting the glass manufacturing container. The support material is made of, for example, a refractory provided around the glass manufacturing container.

“Mullite” is an aluminum silicate compound represented by Al ₂ O ₃ .nSiO ₂ (where n is in the range of 1/2 to 2/3) and stable at high temperatures.

  “Mullite particles” are particles mainly composed of mullite and having a mullite content of 90% by mass or more.

  The “alumina particles” are particles mainly composed of alumina and having an alumina content of 95% by mass or more.

  “Silica particles” refers to particles mainly composed of silica and having a silica content of 95% by mass or more.

  According to the present invention, there is provided a filler capable of producing a filler slurry that has excellent fluidity at the time of filling, but has a short time to cure after being filled and a short time to dry. Can do.

It is typical sectional drawing of the glass manufacturing apparatus which concerns on one Embodiment which implemented this invention.

  Hereinafter, an example of the preferable form which implemented this invention is demonstrated. However, the following embodiment is merely an example. The present invention is not limited to the following embodiments.

(Glass production container 10)
The glass manufacturing apparatus 1 includes a glass manufacturing container 10. The glass manufacturing container 10 is made of a noble metal such as Pt or a Pt alloy.

(Firing coating 11)
A fired film 11 is formed on the outer surface of the glass manufacturing container 10. The fired film 11 is a film for suppressing hydrogen permeation.

  The fired film 11 is formed by firing a coating material containing a glass component. The coating material preferably contains a glass component and a refractory component for holding the glass component.

  The glass component contained in the coating material is not particularly limited. The glass component contained in the coating material is preferably, for example, borosilicate glass or silicate glass, such as borosilicate glass or silicate glass with a low content of alkali metal or alkaline earth metal. More preferably.

  The content of the glass component in the coating material is not particularly limited, but is preferably 20% by mass or more, more preferably 40% by mass to 70% by mass, and 50% by mass to 60% by mass. Further preferred. When there is too little content of the glass component in a coating material, the hydrogen shielding property of the baked film 11 may not fully be obtained. On the other hand, if the content of the glass component in the coating material is too large, the glass component tends to fall off during firing, and the hydrogen shielding properties may deteriorate.

  Examples of the refractory component contained in the coating material include silica and alumina. The coating material preferably contains all of the glass component, silica, and alumina. In this case, the content of silica in the coating material is preferably 15% by mass to 40% by mass, and more preferably 20% by mass to 30% by mass. If the content of silica in the coating material is too small, the amount of silica that dissolves in the glass component decreases, and the viscosity of the glass component does not increase, so that the coating flows and falls off during firing, or the rigidity of the fired coating 11 decreases. There is a case. When the content of silica in the coating material is too large, alumina is relatively reduced, and the amount of mullite crystals generated is reduced, which may reduce the rigidity of the fired coating 11.

  The average particle size of silica contained in the coating material is preferably 50 μm or less, and more preferably 10 μm or less. In particular, it is preferable to use colloidal silica containing finer silica particles. This is because if the average particle size of silica contained in the coating material is too large, silica will not easily dissolve in the glass component, so that the formation of mullite will be slow and it may be difficult to suppress the flow of the glass component during firing. .

  “Colloidal silica” refers to silica particles having an average particle size of 1 nm to 30 nm dispersed in a dispersion medium.

  The content of alumina in the coating material is preferably 10% by mass to 40% by mass, and more preferably 16% by mass to 27% by mass. When there is too much content of the alumina in a coating material, a glass component may run short and the fired film 11 may crack. If the content of alumina in the coating material is too small, the amount of alumina that dissolves in the glass component decreases, the viscosity of the glass component does not increase sufficiently, and the glass component may fall off during firing. The alumina contained in the coating material is preferably alumina particles having an average particle diameter of 1 μm to 100 μm. By adding alumina particles having such an average particle diameter, deformation and sagging of the fired film 11 can be effectively suppressed, and a uniform fired film 11 can be easily formed. In addition, it is preferable to further add alumina fine particles or alumina fibers having an average particle diameter of nano-order (for example, 5 nm to 50 nm). Alumina fine particles are rapidly dissolved in glass components. For this reason, since the viscosity of a glass component can be increased by adding alumina microparticles | fine-particles, drop-off | omission of the glass component at the time of baking can be suppressed. Moreover, the strength of the fired film 11 can be improved by adding alumina fiber.

  The composition of the coating material needs to be appropriately adjusted depending on the use temperature of the glass production container. For example, when the operating temperature of the glass production container is as high as 1300 ° C. or higher, it is preferable to increase the content of the refractory component or to use glass having a higher softening temperature as the glass component.

(Support material 30)
A support material 30 is disposed outside the glass manufacturing container 10. The support member 30 is made of an appropriate refractory. Specifically, the support material 30 can be composed of, for example, a fired refractory or an electroformed refractory.

(Filler layer 20)
A clearance is provided between the glass manufacturing container 10 and the support material 30. This clearance is filled with the filler layer 20. The filler layer 20 is in close contact with the fired film 11 formed on the outer surface of the glass production container 10.

  The filler layer 20 is formed by firing a filler. Here, the filler includes glass powder, an aggregate having a particle size of 0.2 mm or more, ceramic powder, and a hydraulic substance containing an alkaline earth oxide. Thus, since a filler contains glass powder, a composition with the coating material which also contains glass powder becomes close. For this reason, a filler is hard to react with the coating material containing glass powder compared with fillers, such as the mortar which does not contain the conventional glass powder, and an alumina castable, for example. Therefore, the composition shift of the fired film 11 due to the reaction between the coating material and the filler can be suppressed. That is, the fired film 11 having a desired composition and high hydrogen shielding properties can be formed. Therefore, it is possible to obtain the glass manufacturing apparatus 1 in which bubbles of oxygen gas are hardly generated in the glass melt.

  In addition, the kind of glass powder is not specifically limited. The glass powder is preferably a glass having a high glass softening temperature. Specifically, the glass powder is preferably borosilicate glass or silicate glass, for example, borosilicate glass or silicate glass with a low content of alkali metal or alkaline earth metal. More preferably. The glass powder is preferably alkali-free glass. The kind of glass powder contained in the filler is preferably substantially equal to the kind of glass powder contained in the coating material.

  In the present invention, the glass powder includes crystallized glass.

  By the way, as mentioned above, the filler needs to contain glass powder from a viewpoint of reducing the reactivity with a coating material. However, glass powder has a melting point lower than that of, for example, a refractory component and is easily melted. For this reason, at the time of baking of a coating material, it exists in the tendency for a glass component to fall out from a filler layer easily. As a result, the filler layer contracts, and a gap may be generated between the glass production container and the support material. If it does so, it may become impossible to fix a glass manufacturing container firmly to a support material.

  In addition, when a glass component falls out and a clearance gap arises between a glass manufacturing container and a support material, since the clearance gap is not so large normally, it is difficult to fill.

  For this reason, it is preferable that a filler further contains ceramic powder with glass powder. Further, the filler preferably contains at least one of alumina particles having a particle diameter in the range of 1 μm to 50 μm and silica particles having a particle diameter in the range of 1 μm to 100 μm as the ceramic powder. . In this case, it becomes difficult for the glass component to fall off from the filler layer when the coating material is fired. Therefore, the shrinkage of the filler layer during firing of the coating material is effectively suppressed. Therefore, it can suppress that a clearance gap produces between a glass manufacturing container and a support material. As a result, the glass production container can be firmly fixed to the support material.

  In particular, when the filler contains alumina particles and the glass powder contained in the filler contains silica, when the filler is baked to form the filler layer 20, the needle-like crystals of mullite with high hardness are formed. Precipitate. Thereby, while the drop-off | omission of a glass component can be suppressed more effectively, the rigidity of the filler layer 20 can further be improved.

  The alumina particles include alumina fibers. Here, the “alumina fiber” is a material having an elongated shape and containing alumina as a main component. For example, the alumina fiber is preferably substantially cylindrical.

  In addition, each content rate of the alumina particle in which the particle diameter in a filler is in the range of 1 micrometer-50 micrometers, and the silica particle in which the particle diameter is in the range of 1 micrometer-100 micrometers is content of the alumina component in a coating material, or a silica component. It can be set as appropriate according to the rate. For example, the content of each of alumina particles having a particle diameter in the range of 1 μm to 50 μm and silica particles having a particle diameter in the range of 1 μm to 100 μm depends on the content of the alumina component and silica component in the coating material. The rate and the content of the alumina component and the silica component in the filler can be set to be substantially equal.

  Specifically, the content of alumina particles having a particle diameter in the range of 1 μm to 50 μm in the filler is preferably 1% by mass to 10% by mass, and preferably 1% by mass to 8.5% by mass. It is more preferable. The content of the silica particles having a particle diameter in the range of 1 μm to 100 μm in the filler is preferably 1% by mass to 20% by mass, and more preferably 2% by mass to 18% by mass.

  The particle diameter of the alumina particles is more preferably 1 μm to 10 μm. The particle diameter of the silica particles is more preferably 30 μm to 70 μm, and further preferably 40 μm to 60 μm.

  Moreover, in this embodiment, the filler contains the aggregate whose particle diameter is 0.2 mm or more. For this reason, the ratio of the powder with a small particle diameter in a filler can be made small. Therefore, even when there is little dispersion medium such as water contained in the filler slurry, the filler can be suitably dispersed, and a filler slurry having excellent fluidity can be obtained. For this reason, the content rate of the dispersion medium in the filler slurry can be lowered while maintaining the excellent dispersibility of the particles in the filler slurry and the excellent fluidity of the filler slurry. Therefore, the time required for drying the filler slurry can be shortened.

  Moreover, since the shrinkage amount at the time of drying of the filler slurry can be reduced, it is possible to suppress the occurrence of cracks or the like in the filler layer 20.

  From the viewpoint of shortening the time required for drying the filler slurry, the aggregate content in the filler is preferably 40% by mass to 90% by mass, and preferably 50% by mass to 80% by mass. More preferred.

  The particle diameter of the aggregate is preferably 5 mm or less. If the aggregate particle size is too large, the effect that the content of the dispersion medium in the filler slurry can be lowered may be difficult to obtain, or the filling property of the filler slurry may be deteriorated. is there. However, for example, when using a plurality of types of aggregates having different particle diameters, it is preferable that at least one of the plurality of types of aggregates is 0.2 mm to 5 mm, and the other aggregates are 5 mm or more. Also good.

  The particle diameter of the aggregate is more preferably 0.5 mm to 5 mm, and further preferably 1 mm to 3 mm.

  The kind of aggregate is not particularly limited. The aggregate preferably contains, for example, at least one of mullite particles, alumina particles, and silica particles. When the aggregate contains high-hardness mullite particles, the reinforcing effect by the aggregate is great, and the rigidity of the filler layer 20 can be further increased. When the aggregate contains alumina particles or silica particles, mullite needle-like crystals grow from the alumina particles or silica particles during firing, which may increase the rigidity of the filler layer 20.

  In addition, when the constituent material of the aggregate is also included in the coating material, the composition of the coating material and the aggregate are close to each other, and thus hardly react with each other. Therefore, the aggregate is preferably made of a material included in the coating material.

  In the inorganic powder composed of the glass powder, the aggregate having a particle diameter of 0.2 mm or more, and the ceramic powder, the content of the glass powder is preferably 5% by mass to 35% by mass. In the inorganic powder, the aggregate content is preferably 40% by mass to 90% by mass. In the inorganic powder, the content of the ceramic powder is preferably 4% by mass to 30% by mass.

  Moreover, in this embodiment, the filler contains a hydraulic substance. For this reason, after the filler slurry is filled, the filler slurry is cured prior to the drying of the filler slurry. Therefore, the time required for the filler slurry to harden is short.

  Thus, in this embodiment, since the filler contains an aggregate having a particle diameter of 0.2 mm or more and a hydraulic substance in addition to the glass component, the fluidity of the filler slurry at the time of filling the filler slurry. After filling, the time until the filler slurry is cured is short, and the time until the filler slurry is dried is also short.

Specific examples of the hydraulic material preferably used include, for example, a calcium aluminate compound represented by CaO · nAl ₂ O ₃ , a calcium silicate compound represented by CaO · nSiO ₂ , and BaO · nAl ₂ O _3. And barium aluminate compounds. Of these, calcium aluminate compounds, calcium silicate compounds and the like are more preferably used. Specific examples of the calcium aluminate compound represented by _{CaO · nAl 2 O 3, CaO} · Al 2 O 3, CaO · 2Al 2 O 3, CaO · 3Al 2 O 3, CaO · (1/2) Al 2 O ₃ , CaO. (7/12) Al ₂ O ₃ , CaO. (1/3) Al ₂ O _{3 and the} like can be mentioned.

  In addition, when a calcium aluminate compound is used as the hydraulic substance, when water is added to the filler, calcium ions are eluted and calcium hydroxide and hydrate are formed. Thereby, hardening progresses.

  From the viewpoint of shortening the time required for the filler slurry to cure, the content of the hydraulic substance is 0.1 to 3 parts by mass with respect to 100 parts by mass of the inorganic powder in terms of alkaline earth oxide. It is preferable that it is 0.2 mass part-2 mass parts. For example, when a calcium aluminate compound is used as the hydraulic substance, the content of the calcium aluminate compound is 0.1% by mass to 3.0% by mass in terms of CaO with respect to 100 parts by mass of the inorganic powder. It is preferable that it is 0.4 mass%-1.8 mass%.

  If the content of the hydraulic substance with respect to the inorganic powder is too low, the time required for curing the filler slurry may become long. On the other hand, if the content of the hydraulic substance in the inorganic powder is too high, the time required for curing the filler slurry becomes too short, and workability may be lowered.

  The amount of the dispersion medium such as water used for slurrying the filler is preferably 30 parts by mass or less and more preferably 20 parts by mass or less with respect to 100 parts by mass of the filler.

  Further, from the viewpoint of reducing the content of the dispersion medium in the filler slurry, it is preferable to include a peptizer in the filler. Here, the “peptizer” refers to a drug that peptidizes the solid content of the filler. Peptidation refers to the dispersion of solidified solids. Many peptizers are generally in a solution state and may be used in a state dissolved in a solvent such as water.

  Specific examples of the peptizer include ammonium carboxylate polymer compounds such as polycarboxylic acid ammonium salt, sodium carboxylate, and sodium phosphate. Among these, an ammonium carboxylate polymer compound is preferable because it has a large effect of improving the fluidity of the filler. In the present invention, one type of these peptizers may be used, or a plurality of types of peptizers may be used in combination.

  The content of the peptizer is preferably in the range of 0.1 to 10 parts by mass, preferably in the range of 1 to 10 parts by mass with respect to 100 parts by mass of the inorganic powder. It is preferably within the range of 1 to 9 parts by mass. If the content of the peptizer with respect to the inorganic powder is too small, the effect of improving the dispersibility of solid content by adding the peptizer may not be sufficiently obtained. On the other hand, if the content of the peptizer relative to the inorganic powder is too high, the organic component contained in the peptizer itself, particularly the carbon component, may change the properties of the filler, such as reducing the glass powder in the filler. There is.

(Manufacturing method of the glass manufacturing apparatus 1)
Next, the manufacturing method of the glass manufacturing apparatus 1 is demonstrated.

  First, a coating material for forming the fired film 11 is applied on the outer surface of the glass manufacturing container 10. Next, the support material 30 is provided around the glass manufacturing container 10. Next, a filler slurry in which a dispersion medium such as water is added to the filler is filled between the glass production container 10 and the support material 30. Next, the filler slurry is dried. Next, for example, by heating to a temperature of 900 ° C. to 1600 ° C. or more, the applied coating material is baked to form a baked coating 11, and the dried filler slurry is baked to fill the filler layer 20. Form.

  As described above, in this embodiment, the filler slurry is excellent in fluidity, easy to fill, and easy to dry. Therefore, according to the above manufacturing method, the glass manufacturing apparatus 1 that can manufacture glass with less bubbles. Can be easily manufactured in a short time.

  Hereinafter, the present invention will be described in more detail based on experimental examples. However, the following experimental examples are merely illustrative. The present invention is not limited to the following experimental examples.

<< Experiment 1 >>
The raw materials were mixed at a mass ratio specified in Table 1 below to prepare a filler. In the production of the filler, the following raw materials were used.

Glass powder: OA-10G manufactured by Nippon Electric Glass Co., Ltd. (particle size: 1 μm to 20 μm)
Alumina particles: ALM-41 manufactured by Sumitomo Chemical Co., Ltd. (particle size: 1 μm to 3 μm)
Silica particles: MK-Fine (particle size: 10 μm to 100 μm) manufactured by TAM
Alumina fiber: B97N3 (particle size: 30 to 40 μm) manufactured by Denki Kagaku Kogyo Co., Ltd. A bulk fiber board was subdivided into an appropriate amount and ground with a mortar to a specified particle size.

Aggregate: Synthetic mullite MMS 1-3mm product manufactured by ITOCHU CERATECH Co., Ltd. Alumina castable: Alumina castable (Al ₂ O ₃ content of 95% by mass or more) manufactured by Covalent Materials
Hydraulic substance: Calcium aluminate compound prepared as follows

In each case, a calcium carbonate powder raw material having a purity of 99% by mass or more and an aluminum oxide raw material were mixed at a mass ratio of 3: 1 and stirred for 10 minutes with a mixer. After that, it was put into a Pt crucible containing 5% Au, heated and fired at 1450 ° C. for 1 hour in an electric furnace, and then air-cooled. Thereafter, the fired product was pulverized with a ball mill to obtain a calcium aluminate compound having an average particle size of 16 μm. When the obtained calcium aluminate compound was measured by X-ray diffraction, the calcium aluminate compound includes CaO · (1/3) Al ₂ O ₃ , CaO · Al ₂ O ₃ , CaO · 2Al ₂ O ₃ , It was confirmed that CaO.3Al ₂ O ₃ and CaO. (7/12) Al ₂ O ₃ were contained.

  To the fillers according to Examples 1 to 8 and Comparative Examples 1 to 3 of the above production, a minimum amount of water necessary for dispersing the filler was added to produce a filler slurry.

(Evaluation of fillability)
The filler slurry was poured into an acrylic pipe disposed on the substrate and having an inner diameter of 50 mm and a height of 300 mm, and then the cap was capped. In that state, it was allowed to stand for 5 minutes, and the state of the filler slurry was evaluated by visual observation. As a result, a sample that was sufficiently filled was marked with “◯”, and a sample with many gaps and insufficient filling was marked with “x”. The results are shown in Table 1 below.

(Evaluation of curability)
(1) The filler slurry was poured into an acrylic pipe disposed on the substrate and having an inner diameter of 50 mm and a height of 300 mm, and then the lid was capped. After leaving in that state for 15 minutes, the acrylic pipe was pulled up from the substrate. Thereafter, the maximum diameter of the filler on the substrate was measured. The results are shown as “flow value (15 minutes)” in Table 1 below.

  (2) The same measurement as in the above (1) was performed except that the standing time was 30 minutes. The results are shown as “flow value (30 minutes)” in Table 1 below.

  (3) The same measurement as in the above (1) was performed except that the standing time was 48 hours. The results are shown as “flow value (48 hours)” in Table 1 below.

  In addition, since the internal diameter of the acrylic pipe was 50 mm, when the flow value is 50 mm, the filler slurry is cured to such an extent that it loses fluidity.

  As can be seen from the results shown in Table 1, in addition to the glass powder, the filler castables of Examples 1 to 8 including an aggregate having a particle diameter of 0.2 mm or more and a hydraulic substance are filled and curable. Both were excellent. In particular, the fillers of Examples 1 to 7 having a hydraulic substance content of 0.5% by mass or more had more excellent curability.

  On the other hand, Comparative Examples 1 to 3 not including a hydraulic substance or aggregate had poor curability.

<< Experiment 2 >>
16.5 parts by mass of the glass powder used in Experimental Example 1, 4.1 parts by mass of alumina particles, 7.9 parts by mass of silica particles, 1.5 parts by mass of alumina fiber, 70 parts by mass of aggregate, The filler whose content of the peptizer with respect to 100 mass parts of inorganic powder is the quantity shown in following Table 2 was prepared. The amount of water necessary for slurrying the filler was measured. The results are shown in Table 2 below.

  From the results shown in Table 2, it can be seen that the amount of water required for slurrying is reduced when the aggregate particle size is increased. From this, it can be seen that the particle diameter of the aggregate is preferably 0.5 mm or more, and more preferably 1 mm or more.

<< Experimental Example 3 >>
The materials used in Experimental Example 1 were mixed in the proportions shown in Table 3 below to prepare a filler slurry.

  Next, a coating material was applied to a platinum-rhodium 10 mass% alloy crucible (hereinafter referred to as a platinum alloy crucible) having an inner diameter of 46 mm and a height of 40 mm to form a coating material layer. The specific configuration of the coating material was 55% by mass of glass powder, 13.6% by mass of alumina particles, 26.4% by mass of silica particles, and 5% by mass of alumina fibers. In addition, the film thickness of the film | membrane formed with the coding material was 0.5 mm. The coating material was applied by mixing 100 g of the above raw material powder with 200 g of a 1.5% by mass aqueous solution of methylcellulose, and repeatedly spraying and drying the outer surface of the crucible using an air spray.

  Next, a platinum alloy crucible was placed in a refractory crucible having an inner diameter of 56 mm. Next, the above-prepared filler slurry was filled in the clearance between the platinum alloy crucible and the refractory crucible and dried at room temperature. Thereafter, the whole refractory crucible was put into an electric furnace, fired at 1250 ° C. for 1 day, and then cooled.

  Next, alkali-free glass was put into a platinum alloy crucible and heated at 1250 ° C. for 3 hours. After heating, the crucible was taken out from the electric furnace and gradually cooled to room temperature. After cooling, the inside of the platinum alloy crucible was observed with a digital scope (VHX-500F manufactured by Keyence Corporation), and the area ratio (bubble coverage) of the bubbles in the bottom surface of the platinum alloy crucible was measured. The results are shown in Table 3 below.

  From the results shown in Table 3, in Examples 13 and 14 containing aggregate and hydraulic substance in addition to glass powder, the foam coverage was low, but comparative example not containing glass powder, aggregate and hydraulic substance In No. 4, the foam coverage was high.

DESCRIPTION OF SYMBOLS 1 ... Glass manufacturing apparatus 10 ... Glass manufacturing container 11 ... Firing film 20 ... Filler layer 30 ... Support material

Claims (11)

It is a filler filled between a noble metal glass manufacturing container and a support material,
Glass powder,
An aggregate having a particle size of 0.2 mm or more;
Ceramic powder,
Hydraulic substances containing alkaline earth oxides;
A filler for glass production containers.   The content of the hydraulic substance is 0.1 part by mass to 3 parts by mass with respect to 100 parts by mass of the inorganic powder composed of the glass powder, the aggregate, and the ceramic powder in terms of alkaline earth oxide. The filler for glass manufacturing containers of Claim 1. In the inorganic powder consisting of the glass powder, the aggregate and the ceramic powder,
The content of the glass powder is 5% by mass to 35% by mass,
The aggregate content is 40 mass% to 90 mass%,
The filler for a glass manufacturing container according to claim 1 or 2, wherein a content of the ceramic powder is 4% by mass to 30% by mass.   The said hydraulic substance is at least 1 type chosen from the group which consists of a calcium aluminate compound, a calcium silicate compound, and a barium aluminate compound, The filler for glass manufacturing containers as described in any one of Claims 1-3. .   The said aggregate is a filler for glass manufacturing containers as described in any one of Claims 1-4 containing at least 1 of a mullite particle | grain, an alumina particle, and a silica particle.   The filler for glass manufacturing containers as described in any one of Claims 1-5 containing the alumina particle which has a particle diameter in the range of 1 micrometer-50 micrometers as said ceramic powder.   The filler for glass manufacturing containers as described in any one of Claims 1-6 containing the silica particle which has a particle diameter in the range of 1 micrometer-100 micrometers as said ceramic powder.   The filler for glass manufacturing containers as described in any one of Claims 1-7 which further contains a peptizer.   The filler layer for glass manufacturing containers formed by baking the filler for glass manufacturing containers as described in any one of Claims 1-8. A filler layer for a glass production container according to claim 9,
A precious metal glass manufacturing container;
A support material;
With
The glass manufacturing apparatus with which the said filler layer for glass manufacturing containers is filled between the said glass manufacturing container and the said support material. It is a manufacturing method of the glass manufacturing apparatus according to claim 10,
In a gap between the support material and the glass production container, glass powder, aggregate having a particle diameter of 0.2 mm or more, ceramic powder, and a hydraulic substance containing an alkaline earth oxide are included. Filling a filler slurry with a dispersion medium added to the filler;
Drying the filler slurry;
Firing the dried filler slurry to form the filler layer for glass production containers;
A method for manufacturing a glass manufacturing apparatus.

Images