KR20240032730A - Selection device for input raw materials and method for selecting input raw materials - Google Patents

Abstract

The input raw material selection device includes a first registration unit, a first setting unit, an iron concentration prediction unit, and a first selection unit. The first registration unit associates the identification information of the first IC tag with the iron concentration information of the virgin raw material for each first storage unit stored in the first warehouse and registers them in the first inventory database. The first setting unit sets the input amount of the virgin raw material to the dissolution tank every predetermined period, based on the demand for the glass. The iron concentration prediction unit predicts the iron concentration of the glass to be obtained in the future from the iron concentration of the virgin raw material introduced into the dissolution tank in the past. The first selection unit selects from the first warehouse based on the information on the iron concentration of the virgin raw material, the set input amount of the virgin raw material, the predicted iron concentration of the glass, and the threshold value of the iron concentration of the glass. The first storage unit to be shipped is selected.

Description

Selection device for input raw materials and method for selecting input raw materials

This disclosure relates to an apparatus for selecting input raw materials and a method for selecting input raw materials.

As the main raw material for glass, silica sand and the like are used (for example, see Patent Document 1). In addition to silica sand, at least one selected from aluminum oxide, magnesium oxide, dolomite, and boric acid may be used. These raw materials are also called virgin raw materials. Each virgin raw material may be a natural raw material or a chemically synthesized raw material. Each virgin raw material contains some of the elements that constitute glass and includes a metal element or a metalloid element. A plurality of types of virgin raw materials are mixed at a preset mixing ratio to obtain a mixture. Glass is obtained by dissolving the mixture, molding the molten glass into a desired shape, and then cooling and solidifying it. Additionally, as the main raw material for glass, in addition to virgin raw materials, cullet raw materials may be used in some cases. Cullet raw material is crushed glass that cannot be used as a product.

International Publication No. 2009/054314

Virgin raw materials contain impurities. A representative example of an impurity is iron. Iron reduces the visible light transmittance of glass. An example of glass requiring high visible light transmittance is display glass.

The iron concentration of virgin raw materials is measured in advance, and virgin raw materials with iron concentrations below the standard value are delivered to glass manufacturers along with iron concentration measurement data.

Conventionally, even though virgin raw materials with an iron concentration below the standard value were used, there were cases where the visible light transmittance of glass fell below the lower limit.

As a result of investigating the iron concentration of virgin raw materials used in the past, the present inventor found that when virgin raw materials with relatively high iron concentrations were used continuously, the visible light transmittance of glass fell below the lower limit.

One aspect of the present disclosure provides a technique for stabilizing the transmittance of glass at a lower limit or higher.

A device for selecting an input raw material according to one embodiment of the present disclosure includes a first registration unit, a first setting unit, an iron concentration prediction unit, and a first selection unit. The first registration unit includes, for each first storage unit stored in the first warehouse, identification information of the first IC tag provided in the first storage unit, and the iron concentration of the virgin raw material of the glass stored in the first storage unit. The information is related and registered in the first inventory database. The first setting unit sets the input amount of the virgin raw material to the dissolution tank every predetermined period, based on the demand for the glass. The iron concentration prediction unit predicts the iron concentration of the glass to be obtained in the future from the iron concentration of the virgin raw material introduced into the dissolution tank in the past. The first selection unit includes information on the iron concentration of the virgin raw material registered in the first inventory database, the input amount of the virgin raw material set in the first setting unit, and the iron in the glass predicted by the iron concentration prediction unit. The virgin raw material to be introduced into the dissolution tank is selected by selecting the first storage unit shipped from the first warehouse based on the concentration and the threshold value of the iron concentration of the glass.

According to one aspect of the present disclosure, a virgin raw material with an appropriate iron concentration can be selected according to the predicted iron concentration of the glass, the iron concentration of the glass can be stabilized below the threshold, and the transmittance of the glass can be stabilized above the lower limit. You can.

1 is a diagram showing a management system for input raw materials according to one embodiment.
Figure 2 is a diagram showing an example of the components of the selection device as functional blocks.
Figure 3 is a diagram showing an example of information stored in the first inventory database.
4 is a diagram showing an example of information stored in the first performance database.
Figure 5 is a diagram showing an example of the setting result of the raw material input amount.
Figure 6 is a diagram showing an example of the selection results of virgin raw materials.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In addition, in each drawing, identical or corresponding components are given the same reference numerals and descriptions may be omitted. “To” indicating a numerical range means including the numerical values described before and after it as the lower limit and upper limit.

With reference to FIG. 1, a management system 1 for input raw materials according to one embodiment will be described. The management system 1 manages the glass raw materials that the injector 21 injects into the dissolution tank 22. As the main raw material for glass, silica sand and the like are used. In addition to silica sand, at least one selected from aluminum oxide, magnesium oxide, dolomite, and boric acid may be used. These raw materials are also called virgin raw materials. Each virgin raw material may be a natural raw material or a chemically synthesized raw material. Each virgin raw material contains some of the elements that constitute glass and includes a metal element or a metalloid element. A plurality of types of virgin raw materials are mixed at a preset mixing ratio to obtain a mixture. Glass is obtained by dissolving the mixture, molding the molten glass into a desired shape, and then cooling and solidifying it. Additionally, as the main raw material for glass, in addition to virgin raw materials, cullet raw materials may be used in some cases. Cullet raw material is crushed glass that cannot be used as a product.

The glass production line 2 is equipped with an injector 21 for injecting the raw materials selected by the management system 1 into the dissolution tank 22, and a dissolution tank 22 for dissolving the raw materials injected from the injector 21. Although not shown, the dissolution tank 22 has a heater that heats the raw material introduced from the injector 21. As a heater, a gas burner, electrode, or electric heater is used. The gas burner forms a flame above the molten glass and heats the molten glass from above. The electrode is inserted into the molten glass and heats the molten glass with electricity. The electric heater heats the molten glass from the inside or the outside of the molten glass. The type of heater is not particularly limited. Glass is obtained by molding the molten glass obtained in the dissolution tank 22 into a desired shape and subsequently cooling and solidifying it. As a method for forming plate-shaped glass, a float method, a fusion down-draw method, or a slit down-draw method is used. The shape of the glass is not limited to a plate shape.

Glass is, for example, used for displays, and more specifically, is a substrate or cover glass on which a TFT (Thin Film Transistor) or color filter is formed. The display is, for example, a liquid crystal display or an organic EL display.

The glass may be a semiconductor wafer such as a silicon wafer, or a carrier substrate bonded to a semiconductor chip. For example, the carrier substrate is bonded to the semiconductor wafer before thinning of the semiconductor wafer, and reinforces the semiconductor wafer during thinning of the semiconductor wafer. After thinning of the semiconductor wafer, the semiconductor wafer and carrier substrate are separated. Alternatively, the carrier substrate may be bonded to a plurality of semiconductor chips and position the plurality of semiconductor chips before sealing the plurality of semiconductor chips with resin. After sealing the plurality of semiconductor chips with resin, the plurality of semiconductor chips and the carrier substrate are separated.

Glass is, for example, alkali-free glass, aluminosilicate glass, borosilicate glass, or soda-lime glass. Alkali-free glass means glass that does not substantially contain alkali metal oxides such as Na ₂ O and K ₂ O. Here, substantially no alkali metal oxide means that the total content of alkali metal oxide is 0.1% by mass or less.

When the use of the glass is a cover glass, the glass is a chemically strengthened glass. Glass for chemical strengthening, unlike alkali-free glass, contains alkali metal oxide.

Glass for chemical strengthening is, for example, SiO ₂ : 62% to 68%, Al ₂ O ₃ : 6% to 12%, MgO: 7% to 13%, Na ₂ O: 9%, expressed in mol% on an oxide basis. % to 17%, K ₂ O: 0% to 7%, the difference of subtracting the Al ₂ O ₃ content from the total content of Na ₂ O and K ₂ O is less than 10%, and contains ZrO ₂ , The content is 0.8% or less.

Other chemically strengthened glasses are SiO ₂ : 65% to 85%, Al ₂ O ₃ : 3% to 15%, Na ₂ O: 5% to 15%, K ₂ O: 0, expressed as mol% based on oxide. % to less than 2%, MgO: 0% to 15%, ZrO ₂ : 0% to 1%, and the total content of SiO ₂ and Al ₂ O 3 SiO ₂ +Al _{2 O 3 is} 88% or less.

Other chemically strengthened glasses contain 50% to 75% of SiO ₂ , 9% to 20% of Al ₂ O ₃ , 10% to 20% of Na ₂ O, and 0% of K ₂ O, expressed as mol% based on oxide. % to 6%, MgO 0% to 15%, CaO, SrO and BaO 0% to 10% as the total (CaO+SrO+BaO), ZrO ₂ and TiO ₂ as the total (ZrO ₂ +TiO ₂ ) 0% % to 5%, B ₂ O ₃ 0% to 10%, and Li ₂ O 0% to 20%.

When the use of the glass is a substrate on which a TFT or color filter, etc. are formed, the glass is alkali-free glass. Alkali-free glass, unlike glass for chemical strengthening, does not substantially contain alkali metal oxide.

Alkali-free glass is, for example, expressed as mass% based on oxide, SiO ₂ : 50% to 73%, Al ₂ O ₃ : 10.5% to 24%, B ₂ O ₃ : 0% to 12%, MgO: 0. % to 10%, CaO: 0% to 14.5%, SrO: 0% to 24%, BaO: 0% to 13.5%, MgO+CaO+SrO+BaO: 8% to 29.5%, ZrO ₂ : 0% to 5% Contains %.

When the alkali-free glass has both a high strain point and high solubility, it is preferably expressed as mass% based on oxide, SiO ₂ : 58% to 66%, Al ₂ O ₃ : 15% to 22%, B ₂ O ₃ : 5% to 12%, MgO: 0% to 8%, CaO: 0% to 9%, SrO: 3% to 12.5%, BaO: 0% to 2%, MgO+CaO+SrO+BaO: 9% It contains from 18%.

The alkali-free glass, especially when it is desired to obtain a high strain point, is preferably expressed as mass% based on oxide, SiO ₂ : 54% to 73%, Al ₂ O ₃ : 10.5% to 22.5%, B ₂ O ₃ : 0% to 5.5%, MgO: 0% to 10%, CaO: 0% to 9%, SrO: 0% to 16%, BaO: 0% to 2.5%, MgO+CaO+SrO+BaO: 8% to Contains 26%.

The thickness of the glass is selected depending on the intended use of the glass. When the use of the glass is a cover glass of a display, the thickness of the glass is, for example, 0.1 mm to 2.0 mm. On the other hand, when the glass is used as a glass substrate for a display, the thickness of the glass is, for example, 0.1 mm to 0.7 mm. In addition, the thickness of the glass is measured at the center of the width direction of the glass.

However, virgin raw materials of glass contain impurities. A representative example of an impurity is iron. Iron reduces the visible light transmittance of glass. An example of glass requiring high visible light transmittance is display glass. The visible light transmittance of display glass is, for example, 90% to 100%, and is preferably 95% to 100%.

The iron concentration of virgin raw materials is measured in advance, and virgin raw materials with iron concentrations below the standard value are delivered to glass manufacturers along with iron concentration measurement data.

Conventionally, even though virgin raw materials with an iron concentration below the standard value were used, there were cases where the visible light transmittance of glass fell below the lower limit.

As a result of investigating the iron concentration of virgin raw materials used in the past, the present inventor found that when virgin raw materials with relatively high iron concentrations were used continuously, the visible light transmittance of glass fell below the lower limit.

The management system 1 manages the raw materials of the glass that the injector 21 is injected into the dissolution tank 22 in order to stabilize the transmittance of the glass above the lower limit. For example, as shown in FIG. 1, the management system 1 includes a first IC tag 31, a first warehouse 41, a first IC tag reader 42 for stocking, and a first IC for shipping. Tag reader 43, first transporter 44, second IC tag 51, second warehouse 61, second stocking IC tag reader 62, and second shipping IC tag It is provided with a reader (63), a second transporter (64), a reader (71), and a selection device (80).

The first IC tag 31 is attached to the first storage portion 32. The first storage portion 32 stores virgin raw materials. The virgin raw material stored in the first storage portion 32 is not particularly limited, but is, for example, silica sand. Silica sand is a raw material for SiO ₂ , the main component of glass, and is used in large quantities compared to other virgin raw materials. Therefore, it is important to manage the iron concentration of silica sand.

The first storage portion 32 is, for example, a bag or container. The first storage portion 32 is prepared by a raw material manufacturer of virgin raw materials. The raw material manufacturer supplies the virgin raw material to the glass maker with the virgin raw material stored in the first storage unit 32. The raw material manufacturer measures the quality information of the virgin raw materials in advance and also delivers the measured quality information to the glass maker.

Quality information of virgin raw materials is measured for each lot of virgin raw materials. One lot is divided into a plurality of first storage units 32 and stored.

Quality information for virgin raw materials includes, for example, composition data. Compositional data includes, for example, iron concentration. The composition data may include the concentration of at least one impurity other than iron selected from moisture, sulfur, chlorine, and sodium.

The quality information of virgin raw materials may also include particle size data. Particle size data includes, for example, 50% particle size. The 50% particle size is the particle size corresponding to the cumulative amount of 50% in the cumulative distribution of particle sizes (based on volume), that is, the volume of particles is accumulated from the side with the smaller particle size, and the accumulated volume is 50% of the total volume of all particles. The particle size is . The 50% particle size of silica sand is, for example, 30 μm to 40 μm.

When the glass maker receives the first accommodating parts 32, it attaches the first IC tag 31 to each of the first accommodating parts 32. The first IC tag 31 is RFID (Radio Frequency IDentification). Although not shown, the first IC tag 31 has an IC chip and an antenna.

The IC chip stores unique identification information for each first IC tag 31. The identification information includes information indicating the variety of the virgin raw material, information indicating the lot number of the virgin raw material, and information indicating a serial number attached to each lot number. The reason for attaching a serial number is that one lot is divided into and stored in a plurality of first storage units 32.

The antenna receives radio waves converted into power from the IC tag reader and transmits identification information stored in the IC chip to the IC tag reader.

The glass maker receives the quality information of the virgin raw material stored in the first storage unit 32, for example, by printing it on a paper medium. The glass maker uses a reader 71 to read the quality information printed on the paper.

The reader 71 is, for example, OCR (Optical Character Recoginiton/Reader). The reader 71 transmits the read quality information to the selection device 80. The selection device 80 receives quality information of virgin raw materials from the reader 71. Additionally, the selection device 80 may receive quality information of virgin raw materials from a computer of a measuring device that measures the quality information through the Internet.

The first warehouse 41 stores a plurality of first storage units 32. For each first storage unit 32, the storage location of the first storage unit 32 and the identification information of the first IC tag 31 attached to the first storage unit 32 are managed in association.

The first IC tag reader 42 for storage is installed at the entrance of the first warehouse 41. When the first storage unit 32 is stored in the first warehouse 41, the first IC tag reader 42 reads the identification information of the first IC tag 31 and sends it to the selection device 80. Send.

The first shipping IC tag reader 43 is installed at the exit of the first warehouse 41. When the first storage unit 32 is shipped from the first warehouse 41, the first shipping IC tag reader 43 reads the identification information of the first IC tag 31 and sends it to the selection device 80. Send.

The first transporter 44 transports the virgin raw material stored in the first storage unit 32. The first transporter 44 ships the first storage unit 32 from the first warehouse 41. Afterwards, the virgin raw materials are mixed with other virgin raw materials and are introduced into the dissolution tank 22 through the injector 21.

The second IC tag 51 is attached to the second storage portion 52. The second storage unit 52 stores cullet raw materials. Cullet raw material is crushed glass that cannot be used as a product. Using cullet raw materials as raw materials for glass not only helps save resources, but also helps improve the quality of glass. This is because cullet raw materials contain a variety of components and melt at a lower temperature compared to virgin raw materials.

The second storage portion 52 is, for example, a bag or container. The second storage portion 52 is prepared by a glass maker. Glass manufacturers measure the quality information of cullet raw materials in advance. Quality information of cullet raw materials is measured for each lot of cullet raw materials. The lot of cullet raw materials is determined, for example, by the date of manufacture of the glass. One lot may be divided into and stored in a plurality of second storage units 52.

Quality information of the cullet raw material includes, for example, composition data. Compositional data includes, for example, iron concentration. The composition data may include the concentration of at least one impurity other than iron selected from moisture, sulfur, chlorine, and sodium. The quality information of cullet raw materials may also include particle size data. Particle size data includes, for example, 50% particle size. The quality information of the cullet raw material is transmitted from the computer of the measuring device that measures the quality information to the selection device 80 via the Internet.

A glass maker stores cullet raw materials in the second storage section 52 and attaches the second IC tag 51 to each second storage section 52 . The second IC tag 51 is RFID (Radio Frequency IDentification). Although not shown, the second IC tag 51 has an IC chip and an antenna.

The IC chip stores unique identification information for each second IC tag 51. Identification information includes information indicating the variety of the cullet raw material and information indicating the lot number of the cullet raw material. When one lot is divided and stored in a plurality of second storage units 52, the identification information further includes information indicating a serial number assigned to each lot number.

The antenna receives radio waves converted into power from the IC tag reader and transmits identification information stored in the IC chip to the IC tag reader.

The second warehouse 61 stores a plurality of second storage units 52. For each second storage unit 52, the storage location of the second storage unit 52 and the identification information of the second IC tag 51 attached to the second storage unit 52 are managed in association.

The second warehousing IC tag reader 62 is installed at the entrance of the second warehouse 61. When the second storage unit 52 is stored in the second warehouse 61, the second IC tag reader 62 reads the identification information of the second IC tag 51 and sends it to the selection device 80. Send.

The second shipping IC tag reader 63 is installed at the exit of the second warehouse 61. When the second storage unit 52 is shipped from the second warehouse 61, the second shipping IC tag reader 63 reads the identification information of the second IC tag 51 and sends it to the selection device 80. Send.

The 2nd transport machine 64 transports the cullet raw material in the state accommodated in the 2nd storage part 52. The second transporter 64 ships the second storage unit 52 from the second warehouse 61. After that, the cullet raw material is injected into the dissolution tank 22 by the injector 21. The cullet raw material may be thrown into the dissolution tank 22 separately from the virgin raw material, or may be mixed with the virgin raw material and then thrown into the dissolution tank 22.

The selection device 80 is for example a computer. The selection device 80 includes a CPU (Central Processing Unit) 81 and a memory 82 such as RAM (Random Access Memory) or ROM (Read Only Memory). The memory 82 stores programs that control various processes executed in the management system 1. The selection device 80 controls the operation of the management system 1 by causing the CPU 81 to execute a program stored in the memory 82.

The selection device 80 includes an input interface 83, an output interface 84, and a communication interface 85. The selection device 80 receives signals from the outside through the input interface 83 and transmits signals to the outside through the output interface 84. The selection device 80 transmits or receives information through the communication interface 85 to an external computer connected through a network.

Next, with reference to FIG. 2, the components of the selection device 80 according to one embodiment will be described. Additionally, each functional block shown in FIG. 2 is conceptual and does not necessarily need to be physically configured as shown. It is possible to configure all or part of each functional block shown in FIG. 2 by functionally or physically dispersing and integrating them into arbitrary units. All or any part of each processing function performed in each functional block can be realized by a program running on the CPU, or by hardware using wired logic.

For example, as shown in FIG. 2, the selection device 80 includes a data reception unit 101, a data transmission unit 102, a first registration unit 103, a first setting unit 104, and an iron concentration prediction unit. It has a unit 105, a first selection unit 106, a second registration unit 107, a second setting unit 108, and a second selection unit 109. In addition, the selection device 80 includes a product information database 111, a demand database 112, a first quality database 113, a first inventory database 114, and a first performance database 115, It has a second quality database 116, a second inventory database 117, and a second performance database 118.

The data receiving unit 101 receives various types of information using the input interface 83 or the communication interface 85. The information to be received is, for example, the identification information of the first IC tag 31, the quality information of the virgin raw material, the identification information of the second IC tag 51, the quality information of the cullet raw material, and the glass product. It includes information about, information about the demand for glass, and information about the yield of glass. Information about glass products includes, for example, the threshold value of iron concentration in the glass.

The data transmission unit 102 transmits various types of information using the output interface 84 or the communication interface 85. The information to be transmitted includes, for example, instructions for the first transport device 44 and instructions for the second transport device 64. The command for the first transporter 44 includes an command to ship the first storage unit 32 selected in the first selection unit 106 from the first warehouse 41 . The command for the second transporter 64 includes an command to ship the second storage unit 52 selected in the second selection unit 109 from the second warehouse 61.

The first register 103 associates the identification information of the first IC tag 31 with the quality information of the virgin raw material for each first storage unit 32 stored in the first warehouse 41, and stores the first inventory. Register in the database 114. Quality information for virgin raw materials includes, for example, composition data. Compositional data includes, for example, iron concentration. The composition data may include the concentration of at least one impurity other than iron selected from moisture, sulfur, chlorine, and sodium. The quality information of virgin raw materials may also include particle size data.

The first inventory database 114 stores the identification information of the first IC tag 31 and the quality information of the virgin raw material in association (see FIG. 3). The first inventory database 114 is updated when the first storage unit 32 is received in the first warehouse 41, and is also updated when the first storage unit 32 is shipped from the first warehouse 41.

Quality information on virgin raw materials before being stored in the first warehouse 41 is stored in the first quality database 113. On the other hand, the quality information of virgin raw materials after being shipped from the first warehouse 41 is stored in the first performance database 115 (see Fig. 4). Only quality information of virgin raw materials stored in the first warehouse 41 is stored in the first inventory database 114.

The second registration unit 107 associates the identification information of the second IC tag 51 with the quality information of the cullet raw material for each second storage unit 52 stored in the second warehouse 61, and Register in the inventory database (117). Quality information of the cullet raw material includes, for example, composition data. Compositional data includes, for example, iron concentration. The composition data may include the concentration of at least one impurity other than iron selected from moisture, sulfur, chlorine, and sodium. The quality information of cullet raw materials may also include particle size data.

The second inventory database 117 stores the identification information of the second IC tag 51 and the quality information of the cullet raw material in association. The second inventory database 117 is updated when the second storage unit 52 is stored in the second warehouse 61, and is also updated when the second storage unit 52 is shipped from the second warehouse 61.

The quality information of the cullet raw materials before being stored in the second warehouse 61 is stored in the second quality database 116. On the other hand, the quality information of the cullet raw material after being shipped from the second warehouse 61 is stored in the second performance database 118. Only the quality information of the cullet raw materials stored in the second warehouse 61 is stored in the second inventory database 117.

The first setting unit 104 sets the input amount of the virgin raw material to the dissolution tank 22 every predetermined period (eg, one month), for example, based on the demand for glass and the yield of glass. The second setting unit 108 sets the input amount of the cullet raw material to the dissolution tank 22 based on the input amount of the virgin raw material set in the first setting unit 104 and the demand for glass every predetermined period. The first setting unit 104 and the second setting unit 108 set the input amount of the virgin raw material and the input amount of the cullet raw material so that the inventory amount of the cullet raw material falls within the allowable range, for example.

Next, with reference to FIG. 5, an example of setting the input amount of raw materials will be described. In addition, the numerical values in FIG. 5 are relative values standardized for each item. Between items, the size relationship between numbers has no meaning. For example, in the input amount of virgin raw materials and the input amount of cullet raw materials, there is no meaning in the relationship between the magnitude of the numbers.

In January, for example, the demand for glass is 100, the yield of glass is 100, the input amount of virgin raw materials is 100, and the input amount of cullet raw materials is 100. The figures after February are relative values standardized to the January figures.

In February, compared to January, the demand for glass is halved from 100 to 50, but the yield of glass remains at 100. Therefore, in February, the input amount of virgin raw materials is halved from 100 to 50, and the input amount of cullet raw materials is also halved from 100 to 50.

In March, compared to January, the demand for glass remains at 100, but the yield of glass is increasing from 100 to 110. Therefore, in March, the input amount of virgin raw materials increases from 100 to 107, and the input amount of cullet raw materials decreases from 100 to 80.

As mentioned above, the cullet raw material is obtained by pulverizing glass that cannot be used as a product. As the yield of glass increases, the amount of glass that does not become a product decreases, and thus the production volume of cullet raw materials decreases.

Therefore, when the yield of glass increases, the input amount of virgin raw materials is increased so that the consumption of cullet raw materials decreases. Thereby, a stock of cullet raw materials can be secured, and glass can be manufactured using both cullet raw materials and virgin raw materials.

In April, compared to January, the demand for glass remains at 100, but the yield of glass has decreased from 100 to 90. Therefore, in April, the input amount of virgin raw materials is reduced from 100 to 90, and the input amount of cullet raw materials is increased from 100 to 130.

As described above, the first setting unit 104 sets the input amount of the virgin raw material to the dissolution tank 22 based on the yield of glass in addition to the demand for glass. It is possible to secure a stock of cullet raw materials, and to manufacture glass using both cullet raw materials and virgin raw materials.

In addition, the first setting unit 104 is also capable of setting the input amount of virgin raw material to the dissolution tank 22 based only on the demand for glass. When inventory of cullet raw materials is insufficient, the yield of glass can be temporarily reduced to increase production of cullet raw materials.

For example, the iron concentration prediction unit 105 determines the level of glass to be obtained in the future from the iron concentration of the virgin raw material introduced into the dissolution tank 22 in the past and the iron concentration of the cullet raw material previously introduced into the dissolution tank 22. Predict iron concentration. The iron concentration of the virgin raw material introduced into the dissolution tank 22 in the past is obtained from the first performance database 115. The iron concentration of the cullet raw material introduced into the dissolution tank 22 in the past is acquired from the second performance database 118.

The iron concentration prediction unit 105 predicts, for example, the iron concentration of glass obtained from the molten glass currently stored in the dissolution tank 22 as the iron concentration of glass to be obtained in the future. The molten glass is molded into the desired shape and then cooled and solidified. As a result, glass is obtained. The time it takes for the molten glass stored in the dissolution tank 22 to become glass is, for example, several days.

In addition, as will be described later, the quality of glass is stabilized by the first selection unit 106 selecting virgin raw materials. Cullet raw materials are crushed glass and have a certain quality. Therefore, the iron concentration prediction unit 105 may predict the iron concentration of glass to be obtained in the future using only the iron concentration of the virgin raw material. However, the accuracy of prediction can be improved by using the iron concentration of the cullet raw material in addition to the iron concentration of the virgin raw material.

The first selection unit 106 includes information on the iron concentration of the virgin raw material registered in the first inventory database 114, the input amount of the virgin raw material set in the first setting unit 104, and the iron concentration prediction unit 105. The virgin raw material to be introduced into the dissolution tank 22 is selected by selecting the first storage unit 32 shipped from the first warehouse 41 based on the predicted iron concentration of the glass and the threshold value of the iron concentration of the glass. .

Next, with reference to FIG. 6, an example of selection of virgin raw materials will be described. In addition, the numerical values in FIG. 6 are relative values standardized for each item. The iron concentration of the glass predicted by the iron concentration prediction unit 105 and the iron concentration of the virgin raw material selected by the first selection unit 106 are values assuming that the threshold value of the iron concentration of the glass is 100.

The threshold value of iron concentration of glass is one registered in the product information database 111. The iron concentration of glass is Fe ₂ O ₃ concentration. The threshold value of the Fe ₂ O ₃ concentration of glass is, for example, 0.10 mass% or less, and is preferably 0.05 mass% or less.

For example, the first selection unit 106 selects the iron concentration of the glass predicted this time and the input amount of the virgin raw material set this time (i.e., so that the iron concentration of the glass predicted next time falls within 45% to 75% of the threshold value) Virgin raw materials to be introduced into the next ash dissolution tank 22 are selected based on the amount of second ash input. The predicted value of the iron concentration of the glass is preferably 55% to 65%.

The virgin raw material selected this time is shipped from the first warehouse 41 and put into the dissolution tank 22, so it affects the iron concentration of the glass predicted next time. The higher the iron concentration of the virgin raw material selected this time, the higher the iron concentration of the glass predicted next time.

On January 1, the input amount of virgin raw material set in the first setting unit 104 is 100, and the iron concentration of the glass predicted by the iron concentration prediction unit 105 is 55. The predicted value of the iron concentration of the glass is within the desirable range (55% to 65%). Therefore, for example, a virgin raw material with an iron concentration higher than the desirable range is selected by the first selection unit 106.

On January 2, the input amount of virgin raw material set in the first setting unit 104 is 100, and the iron concentration of the glass predicted by the iron concentration prediction unit 105 is 65. The predicted value of the iron concentration of the glass is maintained in the desirable range (55% to 65%). Therefore, for example, a virgin raw material with an iron concentration higher than the desirable range is selected by the first selection unit 106.

On January 3, the input amount of virgin raw material set in the first setting unit 104 is 100, and the iron concentration of the glass predicted by the iron concentration prediction unit 105 is 70. The predicted value of the iron concentration of the glass exceeds the desirable range (55% to 65%). Accordingly, virgin raw materials with an iron concentration lower than the desirable range are selected by the first selection unit 106.

On January 4, the input amount of virgin raw material set by the first setting unit 104 is 50, and the iron concentration of the glass predicted by the iron concentration prediction unit 105 is 53. The predicted value of the iron concentration of the glass is below the desirable range (55% to 65%). Additionally, the input amount of virgin raw materials is relatively small. Accordingly, virgin raw materials with an iron concentration significantly exceeding the desirable range are selected by the first selection unit 106. On January 4, virgin raw materials with a higher iron concentration than the threshold for iron concentration of glass were selected.

As described above, the first selection unit 106 uses the information on the iron concentration of the virgin raw material registered in the first inventory database 114, the input amount of the virgin raw material set in the first setting unit 104, and the iron concentration prediction. Based on the iron concentration of the glass predicted by the unit 105 and the threshold value of the iron concentration of the glass, the virgin raw material to be introduced into the dissolution tank 22 is selected. Therefore, according to the predicted iron concentration of the glass, a virgin raw material with an appropriate iron concentration can be selected, the iron concentration of the glass can be stabilized below the threshold, and the transmittance of the glass can be stabilized above the lower limit. In addition, virgin raw materials with a relatively large standard deviation of iron concentration can be used, and inexpensive virgin raw materials can be used.

As mentioned above, the virgin raw material is, for example, silica sand. The iron concentration of silica sand is Fe ₂ O ₃ concentration. The standard deviation of the Fe ₂ O ₃ concentration of silica sand is, for example, 0.005 mass% or more and 0.03 mass% or less, preferably 0.01 mass% or more and 0.03 mass% or less, and more preferably 0.02 mass% or more and 0.03 mass% or less. am. Compared with the threshold value of the Fe ₂ O ₃ concentration of glass, it can be seen that the standard deviation of the Fe ₂ O ₃ concentration of silica sand is relatively large. In addition, the threshold value of the Fe ₂ O ₃ concentration of glass is, for example, 0.10 mass% or less, and preferably 0.05 mass% or less, as described above.

In addition, the first selection unit 106 is based on the information on the iron concentration of the cullet raw material registered in the second inventory database 117 and the input amount of the cullet raw material set in the second setting unit 108, the dissolution tank ( 22) You may select virgin raw materials to be input. By considering the iron concentration of the cullet raw material in addition to the iron concentration of the virgin raw material, the iron concentration of the glass can be stabilized with high precision.

The first selection unit 106 may select the virgin raw material to be introduced into the dissolution tank 22 based on the information on the moisture content of the virgin raw material registered in the first inventory database 114 and the temperature of the dissolution tank 22. The temperature of the dissolution tank 22 is measured with a thermometer 23 shown in FIG. 1. The thermometer 23 is not particularly limited, but is, for example, a radiation thermometer. The thermometer 23 transmits the measured data to the selection device 80. The first selection unit 106 selects virgin raw materials with a lower moisture content as the temperature of the dissolution tank 22 decreases. When moisture evaporates, it absorbs heat and lowers the temperature of the dissolution tank 22. By selecting a virgin raw material with a moisture content according to the temperature of the dissolution tank 22, the temperature of the dissolution tank 22 can be stabilized.

In addition, the first selection unit 106 selects the virgin raw material to be introduced into the dissolution tank 22 based on the information on the moisture content of the cullet raw material registered in the second inventory database 117 and the temperature of the dissolution tank 22. do. By considering the moisture content of the cullet raw material in addition to the moisture content of the virgin raw material, the temperature of the dissolution tank 22 can be stabilized with high precision.

The second selection unit 109 includes information on the iron concentration of the cullet raw material registered in the second inventory database 117, the input amount of the cullet raw material set in the second setting unit 108, and the iron concentration prediction unit 105. Based on the iron concentration of the glass predicted in ) and the threshold value of the iron concentration of the glass, the cullet raw material to be introduced into the dissolution tank 22 by selecting the second storage unit 52 shipped from the second warehouse 61 Select . Since selection of cullet raw materials is the same as selection of virgin raw materials, description is omitted.

The second selection unit 109 may select the cullet raw material to be introduced into the dissolution tank 22 based on the information on the moisture content of the cullet raw material registered in the second inventory database 117 and the temperature of the dissolution tank 22. . The second selection unit 109 selects the cullet raw material with a lower moisture content as the temperature of the dissolution tank 22 is lower. Thereby, the temperature of the dissolution tank 22 can be stabilized.

As related to the above embodiment, the following appendix is disclosed.

[Appendix 1]

For each first storage unit stored in the first warehouse, the identification information of the first IC tag provided in the first storage unit and the information on the iron concentration of the virgin raw material of the glass stored in the first storage unit are stored in the first storage unit. 1 a first register registering in an inventory database;

a first setting unit that sets the input amount of the virgin raw material to the dissolution tank based on the demand for the glass at each predetermined period;

an iron concentration prediction unit that predicts the iron concentration of the glass to be obtained in the future from the iron concentration of the virgin raw material previously added to the dissolution tank;

Information on the iron concentration of the virgin raw material registered in the first inventory database, the input amount of the virgin raw material set in the first setting unit, the iron concentration of the glass predicted by the iron concentration prediction unit, and the amount of iron in the glass predicted by the iron concentration prediction unit. A first selection unit that selects the virgin raw material to be introduced into the dissolution tank by selecting the first storage unit to be shipped from the first warehouse based on the threshold value of iron concentration.

A device for selecting input raw materials, comprising:

[Book 2]

The selection device for the input raw material described in Appendix 1, wherein the first setting unit sets the input amount of the virgin raw material to the dissolution tank based on the demand for the glass and the yield of the glass every predetermined period.

[Appendix 3]

The first registration unit includes, for each of the first storage units stored in the first warehouse, identification information of the first IC tag provided in the first storage unit, and the moisture content of the virgin raw material stored in the first storage unit. and registering the information in the first inventory database,

The first selection unit selects the virgin raw material to be introduced into the dissolution tank based on information on the moisture content of the virgin raw material registered in the first inventory database and the temperature of the dissolution tank. The input raw material described in Appendix 1 or 2 selection device.

[Book 4]

For each second storage unit stored in the second warehouse, the identification information of the second IC tag provided in the second storage unit and the information on the iron concentration of the cullet raw material stored in the second storage unit are stored in a second storage unit. a second register registering in an inventory database;

A second setting unit that sets the input amount of the cullet raw material to the dissolution tank, based on the input amount of the virgin raw material set by the first setting unit and the demand for the glass, every predetermined period.

Equipped with

The first selection unit injects the virgin raw material into the dissolution tank based on the information on the iron concentration of the cullet raw material registered in the second inventory database and the input amount of the cullet raw material set in the second setting unit. A selection device for input raw materials according to any one of Appendices 1 to 3, which selects .

[Book 5]

The second registration unit includes, for each second storage unit stored in the second warehouse, identification information of the second IC tag provided in the second storage unit, and the cullet raw material stored in the second storage unit. Registering the moisture amount information in the second inventory database,

The first selection unit selects the virgin raw material to be introduced into the dissolution tank based on the information on the moisture content of the cullet raw material registered in the second inventory database and the temperature of the dissolution tank. Selection device.

[Book 6]

The selection device for the input raw material according to any one of Appendices 1 to 5, wherein the glass contains SiO ₂ as a main component, and the virgin raw material is silica.

[Book 7]

The iron concentration of the silica sand is the Fe ₂ O ₃ concentration, and the standard deviation of the Fe ₂ O ₃ concentration of the silica sand is 0.005 mass% or more and 0.03 mass% or less. The selection device for the input raw material described in Supplementary Note 6.

[Book 8]

The iron concentration of the glass is the Fe ₂ O ₃ concentration, and the threshold value of the Fe ₂ O ₃ concentration of the glass is 0.10 mass% or less. The selection device for the input raw material according to any one of Appendices 1 to 7.

[Book 9]

The input raw material selection device according to any one of Appendices 1 to 8, wherein the glass is display glass.

[Book 10]

(A) For each first storage unit stored in the first warehouse, identification information of the first IC tag provided in the first storage unit and information on the iron concentration of the virgin raw material of the glass stored in the first storage unit are stored in the first storage unit. Relatedly, registering in the first inventory database,

(B) setting the input amount of the virgin raw material to the melting tank at each predetermined period based on the demand for the glass;

(C) predicting the iron concentration of the glass to be obtained in the future from the iron concentration of the virgin raw material introduced into the dissolution tank in the past,

(D) Information on the iron concentration of the virgin raw material registered in (A) above, the input amount of the virgin raw material set in (B) above, the iron concentration of the glass predicted in (C) above, and the iron concentration of the glass Selecting the virgin raw material to be introduced into the dissolution tank by selecting the first storage unit to be shipped from the first warehouse based on a threshold value of iron concentration.

Method for selecting input raw materials having.

[Appendix 11]

The method (B) of the input raw material described in Supplementary Note 10 includes setting the input amount of the virgin raw material to the dissolution tank based on the demand for the glass and the yield of the glass every predetermined period.

[Appendix 12]

The (A) represents, for each first storage unit stored in the first warehouse, identification information of the first IC tag provided in the first storage unit, and the moisture content of the virgin raw material stored in the first storage unit. comprising associating information and registering it in the first inventory database;

The (D) includes selecting the virgin raw material to be introduced into the dissolution tank based on the information on the moisture content of the virgin raw material registered in (A) and the temperature of the dissolution tank, (10) or (11). ) Selection method of input raw materials described in.

[Appendix 13]

(E) For each second storage unit stored in the second warehouse, identification information of the second IC tag provided in the second storage unit and information on the iron concentration of the cullet raw material stored in the second storage unit are related. Registering in the second inventory database,

(F) For each predetermined period, setting the input amount of the cullet raw material to the melting tank based on the input amount of the virgin raw material set in (B) above and the demand for the glass.

With

The (D) selects the virgin raw material to be introduced into the dissolution tank based on the information on the iron concentration of the cullet raw material registered in (E) above and the input amount of the cullet raw material set in (F) above. The method for selecting input raw materials according to any one of Appendices 10 to 12, including.

[Appendix 14]

The (E) represents identification information of the second IC tag provided in the second storage unit for each second storage unit stored in the second warehouse, and the moisture content of the cullet raw material stored in the second storage unit. and registering the information in the second inventory database,

The (D) includes selecting the virgin raw material to be introduced into the dissolution tank based on the information on the moisture content of the cullet raw material registered in (E) above and the temperature of the dissolution tank. The input raw material described in Appendix 13. Selection method.

[Book 15]

The method for selecting an input raw material according to any one of Supplementary Notes 10 to 14, wherein the glass contains SiO ₂ as a main component, and the virgin raw material is silica.

[Book 16]

The iron concentration of the silica sand is the Fe ₂ O ₃ concentration, and the standard deviation of the Fe ₂ O ₃ concentration of the silica sand is 0.005 mass% or more and 0.03 mass% or less. The method for selecting input raw materials according to Supplementary Note 15.

[Book 17]

The iron concentration of the glass is the Fe ₂ O ₃ concentration, and the threshold value of the Fe ₂ O ₃ concentration of the glass is 0.10 mass% or less. The method for selecting the input raw material according to any one of Supplementary Notes 10 to 16.

[Book 18]

The method for selecting input raw materials according to any one of Appendices 10 to 17, wherein the glass is display glass.

As mentioned above, the device for selecting input raw materials and the method for selecting input raw materials according to the present disclosure have been described, but the present disclosure is not limited to the above embodiments or the like. Various changes, modifications, substitutions, additions, deletions, and combinations are possible within the scope described in the patent claims. Those also naturally fall within the technical scope of the present disclosure.

This application claims priority based on Japanese Patent Application No. 2021-113050 filed with the Japan Patent Office on July 7, 2021, and the entire content of Japanese Patent Application No. 2021-113050 is incorporated into this application.

22: Dissolution tank
31: first IC tag
32: first storage unit
41: Warehouse 1
80: selection device
103: First register
104: first setting unit
105: Iron concentration prediction unit
106: First Selection Department
114: First inventory database

Claims (18)

For each first storage unit stored in the first warehouse, the identification information of the first IC tag provided in the first storage unit and the information on the iron concentration of the virgin raw material of the glass stored in the first storage unit are stored in the first storage unit. 1 a first register registering in an inventory database;
a first setting unit that sets the input amount of the virgin raw material to the dissolution tank based on the demand for the glass at each predetermined period;
an iron concentration prediction unit that predicts the iron concentration of the glass to be obtained in the future from the iron concentration of the virgin raw material previously added to the dissolution tank;
Information on the iron concentration of the virgin raw material registered in the first inventory database, the input amount of the virgin raw material set in the first setting unit, the iron concentration of the glass predicted by the iron concentration prediction unit, and the amount of iron in the glass predicted by the iron concentration prediction unit. A first selection unit that selects the virgin raw material to be introduced into the dissolution tank by selecting the first storage unit to be shipped from the first warehouse based on the threshold value of iron concentration.
A device for selecting input raw materials, comprising: The selection device of the input raw material according to claim 1, wherein the first setting unit sets the input amount of the virgin raw material to the dissolution tank based on the demand for the glass and the yield of the glass every predetermined period. The method according to claim 1 or 2, wherein the first registration unit includes identification information of a first IC tag provided in the first storage unit for each of the first storage units stored in the first warehouse, and the first storage unit. Registering in the first inventory database the information on the moisture content of the virgin raw material stored in the storage unit,
The first selection unit selects the virgin raw material to be introduced into the dissolution tank based on information on the moisture content of the virgin raw material registered in the first inventory database and the temperature of the dissolution tank. The method according to claim 1 or 2, wherein for each second storage unit stored in the second warehouse, identification information of a second IC tag provided in the second storage unit, and cullet raw materials stored in the second storage unit. a second register that associates information on iron concentration and registers it in a second inventory database;
A second setting unit that sets the input amount of the cullet raw material to the dissolution tank, based on the input amount of the virgin raw material set by the first setting unit and the demand for the glass, every predetermined period.
Equipped with
The first selection unit injects the virgin raw material into the dissolution tank based on the information on the iron concentration of the cullet raw material registered in the second inventory database and the input amount of the cullet raw material set in the second setting unit. A selection device for input raw materials. The method according to claim 4, wherein the second registration unit includes identification information of a second IC tag provided in the second storage unit for each second storage unit stored in the second storage unit, and stored in the second storage unit. Registering the information on the moisture content of the cullet raw material in the second inventory database,
The first selection unit selects the virgin raw material to be introduced into the dissolution tank based on information on the moisture content of the cullet raw material registered in the second inventory database and the temperature of the dissolution tank. A selection device for input raw materials. The device for selecting an input raw material according to claim 1 or 2, wherein the glass contains SiO ₂ as a main component, and the virgin raw material is silica. The selection device for the input raw material according to claim 6, wherein the iron concentration of the silica sand is Fe ₂ O ₃ concentration, and the standard deviation of the Fe ₂ O ₃ concentration of the silica sand is 0.005 mass% or more and 0.03 mass% or less. The selection device for the input raw material according to claim 1 or 2, wherein the iron concentration of the glass is Fe ₂ O ₃ concentration, and the threshold value of the Fe ₂ O ₃ concentration of the glass is 0.10 mass% or less. The device for selecting input raw materials according to claim 1 or 2, wherein the glass is glass for display. (A) For each first storage unit stored in the first warehouse, identification information of the first IC tag provided in the first storage unit and information on the iron concentration of the virgin raw material of the glass stored in the first storage unit are stored in the first storage unit. Relatedly, registering in the first inventory database,
(B) setting the input amount of the virgin raw material to the melting tank at each predetermined period based on the demand for the glass;
(C) predicting the iron concentration of the glass to be obtained in the future from the iron concentration of the virgin raw material introduced into the dissolution tank in the past,
(D) Information on the iron concentration of the virgin raw material registered in (A) above, the input amount of the virgin raw material set in (B) above, the iron concentration of the glass predicted in (C) above, and the iron concentration of the glass Selecting the virgin raw material to be introduced into the dissolution tank by selecting the first storage unit to be shipped from the first warehouse based on a threshold value of iron concentration.
A method for selecting input raw materials. The method of claim 10, wherein (B) includes setting the input amount of the virgin raw material to the melting tank based on the demand for the glass and the yield of the glass every predetermined period. . The method according to claim 10 or 11, wherein (A) includes identification information of a first IC tag provided in the first storage unit for each of the first storage units stored in the first warehouse, and the first number. and registering information on the moisture content of the virgin raw material received for payment in the first inventory database,
The (D) includes selecting the virgin raw material to be introduced into the dissolution tank based on the information on the moisture content of the virgin raw material registered in (A) and the temperature of the dissolution tank. A method for selecting an input raw material. The method according to claim 10 or 11, wherein (E) for each second storage unit stored in the second warehouse, identification information of the second IC tag provided in the second storage unit, and Correlating information on the iron concentration of the cullet raw material and registering it in a second inventory database;
(F) For each predetermined period, setting the input amount of the cullet raw material to the melting tank based on the input amount of the virgin raw material set in (B) above and the demand for the glass.
With
The (D) selects the virgin raw material to be introduced into the dissolution tank based on the information on the iron concentration of the cullet raw material registered in (E) above and the input amount of the cullet raw material set in (F) above. Method for selecting input raw materials, including. The method according to claim 13, wherein (E) includes, for each second storage unit stored in the second warehouse, identification information of a second IC tag provided in the second storage unit, and information stored in the second storage unit. It includes registering information on the moisture content of the cullet raw material in the second inventory database,
The (D) includes selecting the virgin raw material to be introduced into the dissolution tank based on the information on the moisture content of the cullet raw material registered in (E) above and the temperature of the dissolution tank. A method for selecting input raw materials. The method for selecting an input raw material according to claim 10 or 11, wherein the glass contains SiO ₂ as a main component, and the virgin raw material is silica sand. The method for selecting an input raw material according to claim 15, wherein the iron concentration of the silica sand is Fe ₂ O ₃ concentration, and the standard deviation of the Fe ₂ O ₃ concentration of the silica sand is 0.005 mass% or more and 0.03 mass% or less. The method for selecting an input raw material according to claim 10 or 11, wherein the iron concentration of the glass is Fe ₂ O ₃ concentration, and the threshold value of the Fe ₂ O ₃ concentration of the glass is 0.10 mass% or less. The method of selecting an input raw material according to claim 10 or 11, wherein the glass is display glass.

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