WO2022118781A1 - ガラス溶融炉監視方法、及びガラス物品製造方法 - Google Patents
ガラス溶融炉監視方法、及びガラス物品製造方法 Download PDFInfo
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- WO2022118781A1 WO2022118781A1 PCT/JP2021/043563 JP2021043563W WO2022118781A1 WO 2022118781 A1 WO2022118781 A1 WO 2022118781A1 JP 2021043563 W JP2021043563 W JP 2021043563W WO 2022118781 A1 WO2022118781 A1 WO 2022118781A1
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- Prior art keywords
- glass
- temperature sensor
- temperature
- melting furnace
- refractory
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- 239000011521 glass Substances 0.000 title claims abstract description 88
- 238000002844 melting Methods 0.000 title claims abstract description 86
- 230000008018 melting Effects 0.000 title claims abstract description 86
- 238000012544 monitoring process Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000006060 molten glass Substances 0.000 claims abstract description 70
- 239000011819 refractory material Substances 0.000 claims abstract description 35
- 230000002159 abnormal effect Effects 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims description 22
- 230000020169 heat generation Effects 0.000 claims description 21
- 238000000465 moulding Methods 0.000 claims description 8
- 239000010970 precious metal Substances 0.000 claims description 7
- 239000000155 melt Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 3
- 230000003628 erosive effect Effects 0.000 abstract 2
- 230000000052 comparative effect Effects 0.000 description 13
- 230000004075 alteration Effects 0.000 description 9
- 238000004088 simulation Methods 0.000 description 8
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- 238000000265 homogenisation Methods 0.000 description 5
- 238000005352 clarification Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000011449 brick Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 229910001260 Pt alloy Inorganic materials 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003779 heat-resistant material Substances 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 238000007500 overflow downdraw method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000010583 slow cooling Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 238000006124 Pilkington process Methods 0.000 description 1
- 206010040925 Skin striae Diseases 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000008395 clarifying agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003280 down draw process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052574 oxide ceramic Inorganic materials 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/02—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating
- C03B5/027—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating by passing an electric current between electrodes immersed in the glass bath, i.e. by direct resistance heating
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/42—Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
- C03B5/425—Preventing corrosion or erosion
Definitions
- the present invention relates to a method of monitoring abnormal heat generation of a refractory material constituting a glass melting furnace, and a method of manufacturing a glass article using the monitoring method.
- Patent Document 1 discloses a method of obtaining a temperature profile in a furnace by using a thermograph on the surface of molten glass or a temperature measurement result by a thermocouple inserted in the furnace.
- the furnace wall and bottom of a glass melting furnace are made of refractory material, and the electric resistance of the refractory material is generally higher than that of molten glass. Current flows through the molten glass.
- the electrical resistivity of the refractory decreases relative to the electrical resistivity of the molten glass
- the current flowing through the refractory increases and the temperature of the refractory rises.
- the temperature of the refractory rises the electrical resistivity decreases, so the current that flows further increases, and the temperature rises, creating a vicious cycle.
- the refractory heat may be abnormally generated and melted, so it is important to detect the abnormal heat generation of the refractory in order to improve the safety and stability of production.
- An object of the present invention is to detect abnormal heat generation in a glass melting furnace before the refractory material constituting the glass melting furnace is melted.
- the present invention which was devised to solve the above problems, is a glass melting furnace monitoring method for monitoring the melting damage of refractories constituting a glass melting furnace in which a glass raw material is heated and melted by using an electrode immersed in molten glass.
- the first temperature sensor and the second temperature sensor are provided with a first temperature sensor arranged in an energized region between the electrodes and a second temperature sensor arranged in a non-energized region away from the energized region. It is characterized in that abnormal heat generation of the refractory is detected by using the measured temperature of.
- the temperature of the energized region measured by the first temperature sensor is compared with the temperature of the non-energized region measured by the second temperature sensor, and the abnormality due to the energization of the refractory itself in the energized region is compared.
- the presence or absence of fever can be identified.
- the fireproof material when the measured temperature of the second temperature sensor is subtracted from the measured temperature of the first temperature sensor and the amount of increase in the obtained temperature difference exceeds a predetermined value, the fireproof material is abnormal. It is preferable to detect heat generation. If the refractory does not generate abnormal heat, the temperature of the refractory is determined by the temperature of the molten glass in contact with the refractory. Since the temperature of the molten glass varies depending on the location in the glass melting furnace, the temperature of the refractory also varies depending on the location.
- the temperature of the molten glass changes, but the difference in the amount of temperature change of the molten glass depending on the location is relatively small. Therefore, the difference in the amount of temperature change of the refractory depending on the location is relatively small. Therefore, even if the operating conditions are changed, the temperature difference (comparative temperature difference) obtained by subtracting the temperature measured by the second temperature sensor from the temperature measured by the first temperature sensor becomes close to constant.
- the temperature difference comparative temperature difference
- the temperature of the refractory is determined by adding the amount of heat generated inside the refractory to the temperature of the molten glass in contact with the refractory. Therefore, regardless of changes in operating conditions, the comparative temperature difference increases by the amount of heat generated inside the refractory. From the above, by monitoring the comparative temperature difference, it is possible to detect abnormal heat generation of the refractory.
- the electrode is arranged on the bottom surface of the glass melting furnace. According to such a configuration, convection of the molten glass can be promoted, a glass article having a uniform composition can be obtained, and molding defects such as striae can be reduced.
- the glass raw material is heated only by energization heating by the electrodes.
- the burner and the electrode are used together, when the glass raw material is heated and melted only by the electrode without using the burner, it is necessary to significantly increase the energization of the molten glass, which is an abnormality of the refractory. High risk of fever. Therefore, if the present invention is applied when the glass raw material is heated and melted only by the electrodes without using a burner, the effect of detecting abnormal heat generation of the refractory becomes more remarkable.
- the first temperature sensor and the second temperature sensor are preferably thermocouples. According to such a configuration, the temperature can be easily and accurately measured even if the object to be measured such as a refractory or molten glass constituting the glass melting furnace has a high temperature.
- the temperature measuring units of the first temperature sensor and the second temperature sensor are arranged inside the refractory and measure the temperature of the refractory.
- the temperature of the refractory in the energized region changes due to the heat transferred from the molten glass and the heat generated by the refractory itself.
- the temperature of the refractory in the non-energized region changes only by the heat transferred from the molten glass. Therefore, by monitoring the comparative temperature difference, it is possible to detect the temperature change due to heat generation due to the energization of the refractory itself.
- the temperature measuring unit of the first temperature sensor is arranged inside the refractory to measure the temperature of the refractory
- the temperature measuring unit of the second temperature sensor is the refractory and the refractory. It is preferably arranged at the boundary with the molten glass and measures the temperature of the molten glass. The difference between the amount of temperature change of the refractory in the non-energized region and the amount of temperature change of the molten glass is small. Therefore, the amount of change in the comparative temperature difference is substantially equal between the case where the second temperature sensor measures the temperature of the refractory and the case where the temperature of the molten glass is measured.
- a temperature sensor for measuring the temperature of the molten glass is often installed inside the melting furnace. If the temperature of the molten glass in the non-energized region is measured by using these temperature sensors, it is not necessary to newly install a temperature sensor in the non-energized region.
- the temperature measuring portion of the first temperature sensor and the second temperature sensor is covered with a precious metal cap.
- the thermocouple can be protected from the high temperature environment in the vicinity of the molten glass.
- noble metals have higher thermal conductivity than heat-resistant materials such as oxide ceramics, the responsiveness of temperature measurement is improved.
- the present invention in a glass melting furnace, it is possible to detect an abnormal heat generation before the refractory material constituting the glass melting furnace is melted.
- FIG. 2 is a cross-sectional view taken along the line AA in FIG.
- FIG. 3 is a sectional view taken along line BB in FIG. 3 when the temperature measuring unit of the second temperature sensor is located inside the refractory material.
- FIG. 3 is a sectional view taken along line BB in FIG. 3 when the temperature measuring unit of the second temperature sensor is located at the boundary between the refractory and the molten glass. It is a graph of the simulation result which shows the temperature change of the energized region and the non-energized region when the input power is increased.
- the apparatus for manufacturing a glass article includes a melting furnace 1, a clarification tank 2, a homogenization tank 3, a pot 4, a molded body 5, and the like, in order from the upstream side.
- the supply paths 61 to 64 connecting the respective components 1 to 5 of the above are provided.
- the manufacturing apparatus includes a slow cooling furnace (not shown) that slowly cools the glass ribbon GR formed by the molded body 5, and a cutting device (not shown) that cuts out a glass plate of a desired size from the strip-shaped glass ribbon GR after slow cooling.
- the melting furnace 1 is a container for performing a melting step of melting the charged glass raw material Gr to obtain molten glass Gm, and is connected to the clarification tank 2 by a supply path 61.
- the clarification tank 2 is a container for performing a clarification step of defoaming the molten glass Gm supplied from the melting furnace 1 by the action of a clarifying agent or the like, and is connected to the homogenization tank 3 by a supply path 62.
- the homogenization tank 3 is a container for stirring the clarified molten glass Gm and performing the homogenization step, and includes a stirrer 31 having a stirring blade.
- the homogenization tank 3 is connected to the pot 4 by a supply path 63.
- the pot 4 is a container for performing a state adjusting step of adjusting the molten glass Gm to a state suitable for molding, and adjusts the viscosity and the flow rate of the molten glass Gm.
- the pot 4 is connected to the molded body 5 by a supply path 64.
- Each supply path 61 to 64 is configured by connecting a plurality of supply pipes made of platinum or a platinum alloy.
- the outer peripheral surface of each supply path 61 to 64 is held by a refractory material.
- the molding apparatus for molding the molten glass Gm into a desired shape is configured by the molded body 5.
- the molded body 5 forms the molten glass Gm into a strip-shaped glass ribbon GR by the overflow down draw method.
- the molded body 5 has a substantially wedge-shaped cross-sectional shape (cross-sectional shape orthogonal to the paper surface of FIG. 1), and an overflow groove (not shown) is formed on the upper portion of the molded body 5.
- the molded body 5 causes the molten glass Gm to overflow from the overflow groove and flows down along the side wall surfaces (side surfaces located on the front and back sides of the paper surface) on both sides of the molded body 5.
- the molded body 5 is formed into a plate shape by fusing the flowed molten glass Gm at the lower top portion of the side wall surface.
- the melting furnace 1 energizes the melting tank main body 11, the screw feeder 12 for supplying the glass raw material Gr, the flue 13 for discharging the gas in the melting furnace 1 to the outside, and the molten glass Gm. It includes an electrode 14 for heating and a temperature sensor 15 for monitoring abnormal heat generation of the refractory material 111.
- the melting tank main body 11 melts the glass raw material Gr by energization heating to form molten glass Gm.
- the melting tank main body 11 is made of a refractory material 111 (for example, zirconia-based electroformed bricks, alumina-based electroformed bricks, etc.), and forms a section for the melting space in the furnace.
- a heat insulating material such as a heat insulating brick (not shown) is arranged around the refractory material 111 to improve the heat retaining property of the melting tank main body 11.
- the melting furnace 1 is a single melter having only one melting space of the glass raw material Gr, but may be a multi-melter in which a plurality of melting spaces are connected. Also.
- the molten glass Gm flows in the X-axis direction.
- the melting furnace 1 is provided with a screw feeder 12 as a raw material supply means.
- the screw feeder 12 sequentially supplies the glass raw material Gr so that a portion not covered by the glass raw material Gr is formed on a part of the liquid surface of the molten glass Gm. That is, the melting furnace 1 is a so-called semi-hot top type.
- the melting furnace 1 may be a so-called cold top type in which the entire liquid surface of the molten glass Gm is covered with the glass raw material Gr.
- the raw material supply means may be a pusher, a vibration feeder, or the like.
- the melting furnace 1 is provided with a flue 13 as a gas discharge path for discharging the gas in the melting furnace 1 to the outside.
- a fan 131 for sending gas to the outside is provided in the flue 13. The fan 131 may not be provided.
- the refractory material 111 of the melting furnace 1 is provided with a plurality of electrodes 14 in a state of being immersed in the molten glass Gm for energization heating.
- the melting furnace 1 is not provided with a heating means other than the electrode 14 provided at the bottom of the furnace.
- the glass raw material Gr supplied to the upper surface of the molten glass Gm is indirectly heated and melted.
- the electrode 14 is formed of, for example, rod-shaped molybdenum and is supported by the electrode holder 141.
- the electrode holder 141 includes a cooling pipe (not shown) inside. The cooling pipe cools the electrode 14 and the electrode holder 141 by circulating a liquid cooling material such as water.
- the two electrodes 14 surrounded by the alternate long and short dash line in FIG. 3 are paired, and the molten glass Gm is heated by energizing between the electrodes 14 (energized region 16).
- the region away from the energized region (non-energized region 17) is not energized and heated, but is heated by convection or radiation of the molten glass Gm.
- the temperature sensor 15 is composed of a first temperature sensor 151 and a second temperature sensor 152.
- the first temperature sensor 151 is arranged in the energized region 16, and the second temperature sensor 152 is arranged in the non-energized region 17.
- a thermocouple is used as the temperature sensor 15, but the temperature sensor 15 is not limited to this.
- a platinum thermometer or a radiation thermometer may be used.
- the refractory material 111 is provided with a temperature sensor mounting hole 18 for mounting the temperature sensor 15.
- the temperature sensor mounting hole 18 is closed without penetrating the refractory material 111.
- a precious metal cap 153 is attached to the closed end of the temperature sensor mounting hole 18, and the temperature sensor 15 is pressed against and fixed to the precious metal cap 153 while being housed in the protective tube 154.
- the temperature measuring unit of the temperature sensor 15 can be protected from the high temperature environment.
- the precious metal cap 153 has a high thermal conductivity, the temperature of the refractory 111 can be accurately measured.
- the precious metal cap 153 is made of platinum, but the present invention is not limited to this. Platinum alloys, iridium and other highly heat resistant materials may be used.
- the temperature sensor mounting hole 18 located in the non-energized region 17 may penetrate the refractory material 111.
- the precious metal cap 153 comes into direct contact with the molten glass Gm, and the temperature of the molten glass Gm can be measured.
- the temperature of either the molten glass Gm or the refractory 111 may be measured.
- the temperature of the molten glass Gm and the temperature of the refractory 111 are different, the temperature change due to the change in the operating conditions appears in the molten glass Gm and the refractory 111 in the same manner, so that the first temperature sensor 151 arranged in the energization region 16
- the object of the present invention for detecting the abnormal heat generation of the refractory 111 can be achieved. Therefore, if the existing second temperature sensor 152 for measuring the temperature of the molten glass Gm or the temperature of the refractory 111 is installed, it is not necessary to newly install the second temperature sensor 152.
- the refractory 111 Since the refractory 111 is deteriorated due to being exposed to a high temperature environment for a long time, the possibility that the refractory 111 in the vicinity is deteriorated increases as the temperature of the molten glass Gm rises. Further, in the melting furnace 1, the temperature tends to rise toward the downstream side. Therefore, it is preferable to monitor the most downstream energized region 16 where the refractory 111 is likely to deteriorate and generate abnormal heat.
- the electrical resistivity of the glass raw material Gr is higher than that of the molten glass Gm, as the ratio of the glass raw material Gr mixed in the molten glass Gm increases, it becomes easier to energize the refractory material 111 relatively. The risk of abnormal heat generation of the refractory material 111 increases. In the melting furnace 1, since the ratio of the glass raw material Gr mixed in the molten glass Gm increases toward the upstream, it is preferable to monitor the most upstream energized region 16.
- the temperature of the refractory 111 that is not energized decreases as it moves away from the molten glass Gm. Therefore, the alteration of the refractory material 111 starts from the boundary surface between the refractory material 111 and the molten glass Gm, and gradually progresses to the inside of the refractory material 111. Therefore, the closer the measurement position by the first temperature sensor 151 is to the molten glass Gm, the earlier the abnormal heat generation of the refractory material 111 can be detected.
- the first temperature sensor 151 and the second temperature sensor 152 are connected to a control device (not shown).
- the control device records the measured temperatures of the first temperature sensor 151 and the second temperature sensor 152, and when the comparative temperature difference exceeds a predetermined value, abnormal heat generation occurs, and the risk of melting of the refractory 111 increases. Judge. Hereinafter, the detection of abnormal heat generation will be described using a simulation.
- Two pairs of electrodes 14 were arranged inside the melting furnace 1 which was the target of this simulation, and it was set to input a total of 98.5 kW of electric power. Further, as the temperature measured by the first temperature sensor 151, a temperature located between the pair of electrodes 14 and 10 mm from the interface between the refractory 111 and the molten glass Gm on the refractory 111 side was adopted. As the temperature measured by the second temperature sensor 152, the temperature at a position where the height from the bottom surface of the melting furnace 1 is 300 mm and the boundary between the refractory 111 constituting the side surface of the melting furnace 1 and the molten glass Gm is set. Adopted.
- the electrical resistivity of the refractory 111 from the boundary surface between the refractory 111 and the molten glass Gm to a predetermined depth (alteration depth) was set low. ..
- a simulation using the finite volume method was performed according to the above conditions, and the temperature measured by the first temperature sensor 151 and the second temperature sensor 152 was obtained.
- FIG. 6 shows the change in temperature measured by the first temperature sensor 151 and the second temperature sensor 152 when the electric power input from the electrode 14 into the melting furnace 1 is increased.
- the input power is increased from 98.5 kW by 2.5% to 10%.
- the alteration of the refractory material 111 has not progressed.
- the temperatures measured by the first temperature sensor 151 and the second temperature sensor 152 both increase, and the amount of increase is about the same. Therefore, as shown in FIG. 7, the comparative temperature difference is almost constant regardless of the change in the input power.
- FIG. 8 shows the change in temperature measured by the first temperature sensor 151 and the second temperature sensor 152 when the refractory material 111 is deteriorated.
- the alteration depth of the refractory 111 is increased from 0 mm to 60 mm in increments of 15 mm.
- the input power is not increased.
- the temperature measured by the first temperature sensor 151 rises, but the temperature measured by the second temperature sensor 152 hardly changes. Therefore, as shown in FIG. 9, the comparative temperature difference increases as the alteration of the refractory material 111 progresses.
- the abnormal heat generation can be detected before the refractory material 111 constituting the glass melting furnace 1 is melted.
- the present invention is not limited to the configuration of the above embodiment, and is not limited to the above-mentioned action and effect.
- the present invention can be modified in various ways without departing from the gist of the present invention.
- the glass plate was created by using the overflow downdraw method, but the present invention is not limited to this.
- the slot down draw method or the float method may be used.
- a glass plate has been described as an example as a glass article, but the present invention is not limited to this.
- Other glass articles such as glass fiber and tube glass may be manufactured.
- the electrode 14 is arranged only on the bottom surface of the glass melting furnace 1, but the present invention is not limited to this.
- the electrode 14 may be arranged on the side surface of the glass melting furnace 1.
- the molten glass Gm is heated only by heating by energization between the electrodes 14, but heating by a burner may be combined.
- the burner is attached to the refractory 111 above the liquid level of the molten glass Gm.
- the energization between the electrodes 14 uses a single-phase AC power supply, but the present invention is not limited to this.
- a three-phase AC power supply may be used.
- the three electrodes 14 form a set, and the space between the sets of electrodes 14 forms the energization region 16.
- the present invention can be suitably used for monitoring a glass melting furnace and manufacturing a glass article using the monitoring method of the glass melting furnace.
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- Materials Engineering (AREA)
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Abstract
Description
111 耐火物
14 電極
15 温度センサ
151 第一温度センサ
152 第二温度センサ
153 貴金属キャップ
16 通電領域
17 非通電領域
Gm 溶融ガラス
Gr ガラス原料
Claims (9)
- 溶融ガラスに浸漬した電極を用いてガラス原料を加熱して溶解するガラス溶融炉を構成する耐火物の溶損を監視するガラス溶融炉監視方法であって、
前記電極間の通電領域に配置される第一温度センサと、
前記通電領域から離れた非通電領域に配置される第二温度センサを備え、
前記第一温度センサと前記第二温度センサの測定温度を用いて、前記耐火物の異常発熱を検出することを特徴とするガラス溶融炉監視方法。 - 前記第一温度センサの測定温度から、前記第二温度センサの測定温度を減算し、
得られた温度差の増加量が所定の値を超えた場合に、前記耐火物の異常発熱を検出することを特徴とする請求項1に記載のガラス溶融炉監視方法。 - 前記電極は、前記ガラス溶融炉の底面に配置されることを特徴とする請求項1又は2に記載のガラス溶融炉監視方法。
- 前記ガラス原料は、前記電極による通電加熱のみで加熱されることを特徴とする請求項1~3のいずれかに記載のガラス溶融炉監視方法。
- 前記第一温度センサ及び前記第二温度センサは、熱電対であることを特徴とする請求項1~4のいずれかに記載のガラス溶融炉監視方法。
- 前記第一温度センサ及び前記第二温度センサの温度測定部は前記耐火物の内部に配置され、前記耐火物の温度を測定することを特徴とする請求項1~5のいずれかに記載のガラス溶融炉監視方法。
- 前記第一温度センサの温度測定部は前記耐火物の内部に配置され、前記耐火物の温度を測定し、
前記第二温度センサの温度測定部は前記耐火物と前記溶融ガラスとの境界に配置され、前記溶融ガラスの温度を測定することを特徴とする請求項1~5のいずれかに記載のガラス溶融炉監視方法。 - 前記第一温度センサ及び前記第二温度センサは、前記温度測定部が貴金属キャップで覆われていることを特徴とする請求項6又は7に記載のガラス溶融炉監視方法。
- 請求項1~8のいずれかに記載のガラス溶融炉監視方法を用いた前記ガラス溶融炉により、前記ガラス原料を溶解する溶解工程と、
前記ガラス溶融炉で溶解された前記溶融ガラスを成形する成形工程とを備えることを特徴とするガラス物品製造方法。
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CN202180081171.XA CN116601121A (zh) | 2020-12-02 | 2021-11-29 | 玻璃熔融炉监视方法及玻璃物品制造方法 |
KR1020237018324A KR20230112123A (ko) | 2020-12-02 | 2021-11-29 | 유리 용융로 감시 방법, 및 유리 물품 제조 방법 |
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Citations (6)
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JPH03103328A (ja) * | 1989-06-13 | 1991-04-30 | Pilkington Plc | ガラス融解方法及び融解タンク |
JP2010006674A (ja) * | 2008-06-30 | 2010-01-14 | Ohara Inc | ガラス成形体の製造方法及び製造装置 |
JP2011063503A (ja) * | 2009-08-18 | 2011-03-31 | Hoya Corp | ガラス製造方法、ガラス溶融炉、ガラス製造装置、ガラスブランク製造方法、情報記録媒体用基板製造方法、情報記録媒体製造方法、ディスプレイ用基板製造方法および光学部品製造方法 |
WO2013084832A1 (ja) * | 2011-12-06 | 2013-06-13 | 旭硝子株式会社 | 無アルカリガラスの製造方法 |
JP2018158852A (ja) * | 2017-03-22 | 2018-10-11 | 日本電気硝子株式会社 | ガラス板及びその製造方法 |
JP2018193268A (ja) * | 2017-05-16 | 2018-12-06 | 日本電気硝子株式会社 | ガラス物品の製造方法及び生地漏れ検出装置 |
Family Cites Families (1)
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JP2003183031A (ja) | 2001-12-18 | 2003-07-03 | Nippon Electric Glass Co Ltd | ガラス繊維製造用電気溶融炉及び繊維用ガラスの溶融方法 |
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Patent Citations (6)
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JPH03103328A (ja) * | 1989-06-13 | 1991-04-30 | Pilkington Plc | ガラス融解方法及び融解タンク |
JP2010006674A (ja) * | 2008-06-30 | 2010-01-14 | Ohara Inc | ガラス成形体の製造方法及び製造装置 |
JP2011063503A (ja) * | 2009-08-18 | 2011-03-31 | Hoya Corp | ガラス製造方法、ガラス溶融炉、ガラス製造装置、ガラスブランク製造方法、情報記録媒体用基板製造方法、情報記録媒体製造方法、ディスプレイ用基板製造方法および光学部品製造方法 |
WO2013084832A1 (ja) * | 2011-12-06 | 2013-06-13 | 旭硝子株式会社 | 無アルカリガラスの製造方法 |
JP2018158852A (ja) * | 2017-03-22 | 2018-10-11 | 日本電気硝子株式会社 | ガラス板及びその製造方法 |
JP2018193268A (ja) * | 2017-05-16 | 2018-12-06 | 日本電気硝子株式会社 | ガラス物品の製造方法及び生地漏れ検出装置 |
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