CN113620565A - Kiln for melting neutral borosilicate glass raw material - Google Patents
Kiln for melting neutral borosilicate glass raw material Download PDFInfo
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- CN113620565A CN113620565A CN202110932721.6A CN202110932721A CN113620565A CN 113620565 A CN113620565 A CN 113620565A CN 202110932721 A CN202110932721 A CN 202110932721A CN 113620565 A CN113620565 A CN 113620565A
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- melting
- melting zone
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- 238000002844 melting Methods 0.000 title claims abstract description 94
- 230000008018 melting Effects 0.000 title claims abstract description 94
- 239000005388 borosilicate glass Substances 0.000 title claims abstract description 32
- 230000007935 neutral effect Effects 0.000 title claims abstract description 28
- 239000002994 raw material Substances 0.000 title claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims abstract description 33
- 239000006060 molten glass Substances 0.000 claims abstract description 32
- 238000005485 electric heating Methods 0.000 claims abstract description 20
- 238000005352 clarification Methods 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims description 37
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 13
- 229910052750 molybdenum Inorganic materials 0.000 claims description 13
- 239000011733 molybdenum Substances 0.000 claims description 13
- 239000011449 brick Substances 0.000 claims description 9
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 239000010431 corundum Substances 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 239000011521 glass Substances 0.000 abstract description 11
- 229910052810 boron oxide Inorganic materials 0.000 abstract description 7
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 238000007670 refining Methods 0.000 description 5
- 238000000265 homogenisation Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
Images
Classifications
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- 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
- C03B5/04—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in tank furnaces
-
- 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
- C03B5/18—Stirring devices; Homogenisation
- C03B5/183—Stirring devices; Homogenisation using thermal means, e.g. for creating convection currents
-
- 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
- C03B5/225—Refining
-
- 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
- C03B5/235—Heating the glass
-
- 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
- C03B5/43—Use of materials for furnace walls, e.g. fire-bricks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Glass Melting And Manufacturing (AREA)
Abstract
The present disclosure relates to a furnace for melting a neutral borosilicate glass raw material, the interior of the furnace comprising, in order along the length direction of the furnace, a pre-melting zone, a melting zone and a fining zone; the pre-melting zone is provided with a first electric heating device to heat the neutral borosilicate glass raw material positioned in the pre-melting zone into glass liquid; a retaining wall is arranged between the pre-melting zone and the melting zone, and a flow channel which is communicated with the pre-melting zone and the melting zone and used for flowing the molten glass is formed at the lower end of the retaining wall; the melting zone is provided with a first flame heating device and a second electric heating device for heating the molten glass passing through the flow channel; a weir is arranged between the melting zone and the clarification zone and is used for lifting the height of the molten glass in the melting zone; the fining area is provided with a second flame heating device for heating the molten glass that passes over the weir and enters the fining area. The kiln can effectively reduce volatilization of boron oxide, has good clarifying and homogenizing effects of molten glass, and improves yield and quality of borosilicate glass.
Description
Technical Field
The disclosure relates to the technical field of glass manufacturing, in particular to a kiln for melting neutral borosilicate glass raw materials.
Background
The melting of neutral borosilicate medical glass is different from that of common soda-lime glass, and has the characteristics of high melting temperature, easy delamination of glass liquid, easy volatilization of boron oxide, large change of resistivity along with temperature, relatively difficult clarification and the like.
The kiln in the prior art can not effectively reduce the volatilization of boron oxide, thereby causing the produced borosilicate glass to have small yield and poor quality, and the glass liquid has poor clarification and homogenization effects.
Disclosure of Invention
The utility model aims at providing a kiln for melting neutral borosilicate glass raw materials, this kiln can effectively reduce the volatilization of boron oxide, and glass liquid clarification, homogenization are effectual, improve borosilicate glass's output and quality.
In order to achieve the above objects, the present disclosure provides a furnace for melting a neutral borosilicate glass raw material, the furnace comprising an interior, in order along a length direction of the furnace, a pre-melting zone, a melting zone, and a fining zone;
the pre-melting zone is provided with a first electric heating device to heat the neutral borosilicate glass raw material in the pre-melting zone into glass liquid;
a retaining wall is arranged between the pre-melting zone and the melting zone, and a flow channel which is communicated with the pre-melting zone and the melting zone and used for allowing the molten glass to flow is formed at the lower end of the retaining wall;
the melting zone is provided with a first flame heating device and a second electric heating device for heating the molten glass passing through the flow channel;
a weir is arranged between the melting zone and the clarification zone and is used for lifting the height of molten glass in the melting zone;
and the clarification zone is provided with a second flame heating device for heating the molten glass which passes through the weir and enters the clarification zone.
Optionally, the kiln comprises a top wall, a side wall and a bottom wall which are connected in sequence, wherein the side wall comprises a first side wall and a second side wall which are oppositely arranged along the width direction of the kiln;
the retaining wall is connected between the first side wall and the second side wall along the width direction of the kiln, a first cooling channel which is communicated with the retaining wall and is positioned above the flow channel is formed in the retaining wall along the width direction of the kiln, and a first cooling port and a second cooling port which are communicated with the first cooling channel are formed in the first side wall and the second side wall respectively;
the baffle wall is positioned on the left side and/or the right side of the runner with the same height approximately, a second cooling channel in a zigzag shape is formed in the baffle wall along the width direction of the kiln, and an inlet and an outlet of the second cooling channel are positioned on the left side wall of the baffle wall and/or positioned on the right side wall of the baffle wall;
and two third cooling ports which are respectively communicated with the inlet and the outlet of the second cooling channel are formed on the first side wall, and/or two fourth cooling ports which are respectively communicated with the inlet and the outlet of the second cooling channel are formed on the second side wall.
Optionally, the kiln comprises a top wall, a side wall and a bottom wall which are connected in sequence, wherein the side wall comprises a third side wall and a fourth side wall which are oppositely arranged along the length direction of the kiln; and the third sidewall is adjacent to the pre-melted zone;
the kiln further comprises an exhaust pipe, an exhaust port is formed above the third side wall, and the exhaust port is communicated with the exhaust pipe.
Optionally, the kiln further comprises a feeding device, a feeding hole communicated with an outlet of the feeding device is formed in the third side wall, and the feeding hole is located below the exhaust port.
Optionally, the kiln comprises a top wall, a side wall and a bottom wall connected in sequence, and the top wall is configured in an arch shape; the top wall includes a first portion for opposing the premelt zone and a second portion for opposing the melting zone and the fining zone along a length of the furnace.
Optionally, the first section comprises a plurality of masonry fused cast bricks and the second section comprises a plurality of masonry fused corundum bricks.
Optionally, the kiln comprises a top wall, a side wall and a bottom wall which are connected in sequence, wherein the side wall comprises a first side wall and a second side wall which are oppositely arranged along the width direction of the kiln;
along the length direction of kiln, first observation opening, second observation opening and third observation opening have been formed with in proper order on first lateral wall and/or the second lateral wall, first observation opening be used for with the premelt district sets up relatively, the second observation opening be used for with the melting district sets up relatively, the third observation opening be used for with the clarification district sets up relatively.
Optionally, the kiln comprises a top wall, a side wall and a bottom wall which are connected in sequence;
the first electric heating device comprises a plurality of first molybdenum electrodes, the first molybdenum electrodes are arranged on the bottom wall in a pluggable manner, and the upper ends of the first molybdenum electrodes protrude out of the inner surface of the bottom wall;
the second electric heating device comprises a plurality of second molybdenum electrodes which are arranged on the bottom wall in a pluggable manner, and the upper ends of the second molybdenum electrodes protrude out of the inner surface of the bottom wall;
the first flame heating device comprises a plurality of first total oxygen burning guns, and the plurality of first total oxygen burning guns are connected to the side wall;
the second flame heating device comprises a plurality of second total oxygen burning guns, and the second total oxygen burning guns are connected to the side wall.
Optionally, the retaining wall is constructed from a plurality of high zirconium bricks.
Optionally, the kiln comprises a top wall, a side wall and a bottom wall which are connected in sequence, wherein the side wall comprises a third side wall and a fourth side wall which are oppositely arranged along the length direction of the kiln; and the fourth side wall is close to the clarification zone, and a throat for communicating with the back material channel is formed on the fourth side wall.
In the technical scheme, the first electric heating device is arranged in the pre-melting area, so that the volatilization of boron oxide can be reduced while the melting efficiency of the neutral borosilicate glass raw material is improved; the first flame heating device and the second electric heating device are arranged in the melting zone to further melt, clarify and homogenize the molten glass, and the design of a flow channel at the lower end of the retaining wall is convenient for the molten glass to flow from the pre-melting zone to the melting zone; the second flame heating device is arranged in the clarification area to further clarify and homogenize the molten glass in the clarification area, and in addition, a weir arranged between the melting area and the clarification area can strengthen the clarification and homogenization of the molten glass and improve the yield and the quality of the borosilicate glass.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a cross-sectional view of a furnace for melting a neutral borosilicate glass feedstock in accordance with one embodiment of the present disclosure, the cross-sectional view being taken through a vertical plane extending along the length of the furnace;
FIG. 2 is a cross-sectional view of a furnace for melting a neutral borosilicate glass feedstock in accordance with one embodiment of the present disclosure, the cross-sectional view being taken through a vertical plane extending in the width direction and being located at a retaining wall;
FIG. 3 is a cross-sectional view of a furnace for melting neutral borosilicate glass feedstock in accordance with one embodiment of the present disclosure, the cross-sectional view being taken in a horizontal plane.
Description of the reference numerals
1 first electric heater unit 3 retaining wall
31 flow passage 32 first cooling passage
33 second cooling channel 4 first flame heating device
5 second electric heater 6 weir
7 second flame heating device 8 exhaust pipe
9 feeding device
11 first part of the top wall 111
112 second part
12 side wall
121 first side wall 122 second side wall
123 third side wall 124 fourth side wall
1241 bottom wall of throat 13
10 premelt zone 20 melt zone
30 clarification zone
101 first viewing port 201 second viewing port
301 third viewing port
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, unless stated to the contrary, the use of directional words such as "upper, lower, left, right" generally means that the furnace for melting neutral borosilicate glass raw material of the present disclosure is defined as upper, lower, left, and right in normal use, as can be seen particularly in reference to fig. 1 and 2; the use of directional words such as "length" and width may also be described with reference to FIGS. 1 and 2; terms of orientation such as "inner and outer" are used to refer to the inner and outer of a particular structural outline, and terms such as "first, second and third" are used merely to distinguish one element from another and are not sequential or significant.
As shown in fig. 1 to 3, the present disclosure provides a furnace for melting a neutral borosilicate glass raw material, the interior of which furnace includes a pre-melting zone 10, a melting zone 20, and a fining zone 30 in this order along the length of the furnace. The pre-melting zone 10 is provided with a first electric heating device 1 so as to heat the neutral borosilicate glass raw material positioned in the pre-melting zone 10 into glass liquid; a retaining wall 3 is provided between the pre-melting zone 10 and the melting zone 20, and a flow passage 31 for flowing molten glass is formed at the lower end of the retaining wall 3 to communicate the pre-melting zone 10 and the melting zone 20. The melting zone 20 is provided with a first flame heating device 4 and a second electric heating device 5 for heating the molten glass flowing to the melting zone 20 through the flow passage 310; a weir 6 is arranged between the melting zone 20 and the refining zone 30 and is used for lifting the height of the molten glass in the melting zone 10; the fining zone 30 is provided with a second flame heating device 7 for heating the molten glass that passes over the weir 6 into the fining zone 30.
In the technical scheme, the first electric heating device 1 is arranged in the pre-melting area 10, so that the volatilization of boron oxide can be reduced while the melting efficiency of neutral borosilicate glass raw materials is improved; the first flame heating device 4 and the second electric heating device 5 are arranged in the melting zone 20 to further melt, clarify and homogenize the molten glass, and the flow channel 31 at the lower end of the retaining wall 3 is designed to facilitate the flow of the molten glass from the pre-melting zone 10 to the melting zone 20; the second flame heating device 7 is arranged in the refining area 30 to further refine and homogenize the molten glass in the refining area 30, and in addition, the weir 6 arranged between the melting area 20 and the refining area 30 can enhance the refining and homogenization of the molten glass and improve the yield and the quality of the borosilicate glass.
In one embodiment, referring to fig. 1 and 2, the kiln comprises a top wall 11, a side wall 12 and a bottom wall 13 which are connected in sequence, wherein the side wall 12 comprises a first side wall 121 and a second side wall 122 which are oppositely arranged along the width direction of the kiln; the retaining wall 3 is connected between the first side wall 121 and the second side wall 122 along the width direction of the furnace, a first cooling channel 32 which is through and is positioned above the flow channel 31 is formed inside the retaining wall 3 along the width direction of the furnace, and a first cooling port and a second cooling port which are communicated with the first cooling channel 32 are respectively formed on the first side wall 121 and the second side wall 122.
Through this to leading into cooling medium in this first cooling hole or second cooling hole to first cooling channel 32 to lower the temperature to barricade 3 effectively, avoid the high temperature of barricade 3, prolong the life of barricade 3.
In other embodiments, the baffle wall 3 is located on the left side and/or the right side of the flow channel 31 with approximately the same height, a second cooling channel 33 with a zigzag shape is formed inside the baffle wall 3 along the width direction of the furnace, and the inlet and the outlet of the second cooling channel 33 are both located on the left side wall of the baffle wall 3 and/or both located on the right side wall of the baffle wall 3; the first side wall 121 is formed with two third cooling ports respectively communicating with the inlet and outlet of the second cooling passage 33, and/or the second side wall 122 is formed with two fourth cooling ports respectively communicating with the inlet and outlet of the second cooling passage 33.
The second cooling channel 33 is provided in consideration of the fact that the flow channel 31 is directly contacted with the molten glass at a high temperature in the process that the molten glass flows to the melting zone 20 through the flow channel 31, and the flow channel 31 is easily damaged by a high temperature environment; therefore, the inventor of the present disclosure sets the second cooling channel 33 in a zigzag shape on the left side and/or the right side of the flow channel 31, so as to ensure that the molten glass can flow through the flow channel 31 normally and cool the lower part of the retaining wall 3 at the same time, thereby prolonging the service life of the retaining wall 3.
Alternatively, the retaining wall 3 may be constructed of high-zirconium bricks.
Alternatively, referring to fig. 1 and 3, the kiln comprises a top wall 11, a side wall 12 and a bottom wall 13 which are connected in sequence, wherein the side wall 12 comprises a third side wall 123 and a fourth side wall 124 which are oppositely arranged along the length direction of the kiln; and the third sidewall 123 is adjacent to the pre-melt zone 10; the kiln further comprises an exhaust pipe 8, and an exhaust port is formed above the third side wall 123 and is used for being communicated with the exhaust pipe 8.
In this embodiment, the exhaust port serves as an exhaust gas outlet for the exhaust gas generated by the combustion of the first flame heating device 4 and the second flame heating device 7, so that the accumulation of high-temperature exhaust gas in the kiln can be avoided.
The kiln further comprises a feeding device 9, a feeding hole communicated with an outlet of the feeding device 9 is formed in the third side wall 123, and the feeding hole is located below the exhaust port. In addition, the exhaust port is disposed above the third sidewall 123, and the temperature in the upper region is low, so that the purpose of reducing volatilization of boron oxide can be achieved.
The feeding device 9 may be configured as a screw feeder to uniformly feed the glass raw material into the pre-melting zone 10.
Alternatively, as shown with reference to fig. 1, the kiln comprises a top wall 11, side walls 12 and a bottom wall 13 connected in series, with the top wall 13 being configured in an arch shape; along the length of the furnace, the top wall 11 includes a first portion 111 and a second portion 112, the first portion 111 being intended to be opposite the premelt zone 10 and the second portion 112 being intended to be opposite the melting zone 20 and the fining zone 30. The two parts of the top wall 11 are provided in consideration of the different temperature tolerance required for the top walls of the different regions, and the first part 111 and the second part 112 are provided differently in consideration of the different temperature tolerance required for the top wall corresponding to the pre-melting zone 10 and the temperature tolerance required for the top wall corresponding to the melting zone 20 and the fining zone 30, thereby increasing the service life of the top wall 11.
In particular, the first portion 111 comprises a plurality of masonry of electrically fused bricks and the second portion 112 comprises a plurality of masonry of electrically fused corundum bricks to meet the requirements of use of the top wall 11 in different areas. However, the present disclosure does not limit the specific material of the first portion 111 and the second portion 112.
Referring to fig. 1, the kiln comprises a top wall 11, a side wall 12 and a bottom wall 13 which are connected in sequence, wherein the side wall 12 comprises a first side wall 121 and a second side wall 122 which are oppositely arranged along the width direction of the kiln; along the length direction of the furnace, a first observation port 101, a second observation port 201 and a third observation port 301 are sequentially formed on the first side wall 121 and/or the second side wall 122, wherein the first observation port 101 is used for being arranged opposite to the premelting zone 10, the second observation port 201 is used for being arranged opposite to the melting zone 20, and the third observation port 301 is used for being arranged opposite to the clarifying zone 30.
In this embodiment, the first observation port 101 opposite to the pre-melting zone 10, the second observation port 201 opposite to the melting zone 20, and the third observation port 301 opposite to the fining zone 30 are provided on the first side wall 121 and/or the second side wall 122. An operator can observe the working conditions in different areas through different observation ports, and the normal work of the kiln is ensured.
Referring to fig. 1 and 3, the kiln comprises a top wall 11, a side wall 12 and a bottom wall 13 which are connected in sequence; the first electric heating device 1 comprises a plurality of first molybdenum electrodes which are arranged on the bottom wall 13 in a pluggable manner, and the upper ends of the first molybdenum electrodes protrude out of the inner surface of the bottom wall 13; the second electric heating device 5 comprises a plurality of second molybdenum electrodes which are arranged on the bottom wall 13 in a pluggable manner, and the upper ends of the second molybdenum electrodes protrude out of the inner surface of the bottom wall 13; the first flame heating device 4 comprises a plurality of first total oxygen burning guns which are connected with the side wall 12; the second flame heating means 7 comprises a plurality of second oxy-fuel lances connected to the side wall 12. Thereby realizing the stable heating of the glass raw materials or the molten glass in different areas. However, the present disclosure does not limit the specific configurations of the first electric heating device 1, the second electric heating device 5, the first flame heating device 4, and the second flame heating device 7.
In one embodiment, the kiln comprises a top wall 11, a side wall 12 and a bottom wall 13 which are connected in sequence, wherein the side wall 12 comprises a third side wall 123 and a fourth side wall 124 which are oppositely arranged along the length direction of the kiln; the fourth side wall 124 is close to the fining area 30, and a throat 1241 for communicating with the back channel is formed on the fourth side wall 124, through which throat 1241 the fined and homogenized glass liquid is conveyed to the next process, for example, to the channel forming process through a working pool or a distributor; in addition, the throat 1241 can further homogenize the molten glass and lower the temperature of the molten glass.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. A furnace for melting neutral borosilicate glass raw material, characterized in that the interior of the furnace comprises a pre-melting zone (10), a melting zone (20) and a fining zone (30) in this order along the length direction of the furnace;
the pre-melting zone (10) is provided with a first electric heating device (1) to heat neutral borosilicate glass raw materials positioned in the pre-melting zone (10) into molten glass;
a retaining wall (3) is arranged between the pre-melting zone (10) and the melting zone (20), and a flow channel (31) which is communicated with the pre-melting zone (10) and the melting zone (20) and used for flowing the molten glass is formed at the lower end of the retaining wall (3);
the melting zone (20) is provided with a first flame heating device (4) and a second electric heating device (5) for heating the molten glass flowing to the melting zone (20) through the flow channel (310);
a weir (6) is arranged between the melting zone (20) and the fining zone (30) for raising the molten glass level of the melting zone (10);
the fining area (30) is provided with a second flame heating device (7) for heating the molten glass that passes over the weir (6) into the fining area (30).
2. The furnace for melting a neutral borosilicate glass raw material according to claim 1, wherein the furnace comprises a top wall (11), side walls (12) and a bottom wall (13) connected in series, the side walls (12) comprising a first side wall (121) and a second side wall (122) arranged opposite each other in the width direction of the furnace;
the retaining wall (3) is connected between the first side wall (121) and the second side wall (122) along the width direction of the kiln, a first cooling channel (32) which is through and located above the flow channel (31) is formed inside the retaining wall (3) along the width direction of the kiln, and a first cooling port and a second cooling port which are communicated with the first cooling channel (32) are formed in the first side wall (121) and the second side wall (122) respectively;
the left side and/or the right side of the flow channel (31) with approximate equal height are/is positioned, a second cooling channel (33) in a zigzag shape is formed inside the retaining wall (3) along the width direction of the kiln, and the inlet and the outlet of the second cooling channel (33) are/is positioned on the left side wall of the retaining wall (3) and/or positioned on the right side wall of the retaining wall (3);
two third cooling ports respectively communicated with the inlet and the outlet of the second cooling channel (33) are formed on the first side wall (121), and/or two fourth cooling ports respectively communicated with the inlet and the outlet of the second cooling channel (33) are formed on the second side wall (122).
3. The furnace for melting a neutral borosilicate glass raw material according to claim 1, wherein the furnace comprises a top wall (11), a side wall (12) and a bottom wall (13) connected in sequence, the side wall (12) comprising a third side wall (123) and a fourth side wall (124) arranged opposite each other along the length of the furnace; and said third side wall (123) is close to said pre-melting zone (10);
the kiln further comprises an exhaust pipe (8), an exhaust port is formed above the third side wall (123), and the exhaust port is communicated with the exhaust pipe (8).
4. The furnace for melting a neutral borosilicate glass raw material according to claim 3, wherein said furnace further comprises a feeding device (9), wherein a feeding port for communicating with an outlet of said feeding device (9) is formed on said third side wall (123), and wherein said feeding port is located below said exhaust port.
5. A furnace for melting neutral borosilicate glass raw material according to claim 1, characterized in that it comprises a top wall (11), side walls (12) and a bottom wall (13) connected in sequence, and in that said top wall (13) is configured in an arch shape; along the length of the furnace, the top wall (11) comprises a first portion (111) and a second portion (112), the first portion (111) being intended to be opposite the pre-melting zone (10) and the second portion (112) being intended to be opposite the melting zone (20) and the fining zone (30).
6. The furnace for melting neutral borosilicate glass raw material according to claim 5, wherein said first portion (111) comprises a plurality of masonry electrofused bricks and said second portion (112) comprises a plurality of masonry electrofused corundum bricks.
7. The furnace for melting a neutral borosilicate glass raw material according to claim 1, wherein the furnace comprises a top wall (11), side walls (12) and a bottom wall (13) connected in series, the side walls (12) comprising a first side wall (121) and a second side wall (122) arranged opposite each other in the width direction of the furnace;
follow the length direction of kiln, first lateral wall (121) and/or be formed with first viewing aperture (101), second viewing aperture (201) and third viewing aperture (301) on second lateral wall (122) in proper order, first viewing aperture (101) be used for with it sets up relatively to melt district (10), second viewing aperture (201) be used for with it sets up relatively to melt district (20), third viewing aperture (301) be used for with it sets up relatively to clarify district (30).
8. A furnace for melting neutral borosilicate glass raw material according to claim 1, characterized in that it comprises a top wall (11), side walls (12) and a bottom wall (13) connected in sequence;
the first electric heating device (1) comprises a plurality of first molybdenum electrodes which are arranged on the bottom wall (13) in a pluggable manner, and the upper ends of the first molybdenum electrodes protrude out of the inner surface of the bottom wall (13);
the second electric heating device (5) comprises a plurality of second molybdenum electrodes which are arranged on the bottom wall (13) in a pluggable manner, and the upper ends of the second molybdenum electrodes protrude out of the inner surface of the bottom wall (13);
the first flame heating device (4) comprises a plurality of first oxy-fuel lances connected to the side wall (12);
the second flame heating device (7) comprises a plurality of second oxy-fuel lances which are connected to the side wall (12).
9. The furnace for melting neutral borosilicate glass raw material according to claim 1, wherein said retaining wall (3) is built up from a plurality of high-zirconium bricks.
10. The furnace for melting a neutral borosilicate glass raw material according to claim 1, wherein the furnace comprises a top wall (11), a side wall (12) and a bottom wall (13) connected in sequence, the side wall (12) comprising a third side wall (123) and a fourth side wall (124) arranged opposite each other along the length of the furnace; and the fourth side wall (124) is close to the clarification zone (30), and a throat (1241) for communicating with a rear material channel is formed on the fourth side wall (124).
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| CN202110932721.6A CN113620565A (en) | 2021-08-13 | 2021-08-13 | Kiln for melting neutral borosilicate glass raw material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110932721.6A CN113620565A (en) | 2021-08-13 | 2021-08-13 | Kiln for melting neutral borosilicate glass raw material |
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Cited By (1)
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| CN115466037A (en) * | 2022-09-02 | 2022-12-13 | 湖南旗滨微晶新材料有限公司 | Special glass preparation system and preparation method of special glass |
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