CN108947207B

CN108947207B - Glass melting method

Info

Publication number: CN108947207B
Application number: CN201810791053.8A
Authority: CN
Inventors: 田红星
Original assignee: Dongxu Optoelectronic Technology Co Ltd
Current assignee: Dongxu Optoelectronic Technology Co Ltd
Priority date: 2018-07-18
Filing date: 2018-07-18
Publication date: 2021-09-07
Anticipated expiration: 2038-07-18
Also published as: CN108947207A

Abstract

The invention discloses a glass melting method, which is implemented by using a kiln, wherein the kiln comprises the following components: the furnace body is provided with a first side wall, a second side wall, a third side wall and a fourth side wall, and comprises a plurality of heating zones which are arranged along a first horizontal direction; the burning guns are arranged on at least one of the third side wall and the fourth side wall, wherein each heating area is provided with at least one burning gun; and electrodes arranged on at least one of the third side wall and the fourth side wall; the glass melting method comprises the following steps: and closing the discharge hole, adding raw materials into the furnace body through the feed inlet, providing heat for the raw materials in the furnace body by utilizing the burning gun and the electrode, wherein the oxygen-fuel volume ratio of the burning gun is within a preset range, and the fuel quantity of the burning gun positioned in the adjacent three heating areas meets a preset relationship. By utilizing the glass melting method provided by the embodiment of the invention, the production efficiency of glass can be improved, the defects of bubbles, stripes and the like can be eliminated, the consistency and quality of the glass can be improved, and the energy consumption can be reduced.

Description

Glass melting method

Technical Field

The invention relates to the field of glass, in particular to a glass melting method.

Background

In the related art, batch materials for manufacturing glass are melted in a furnace, and then molten glass that has been melted flows to a next process for conditioning and forming. The effect of the molten glass in the furnace determines the quality of the glass product.

Disclosure of Invention

The present application is based on the discovery and recognition by the inventors of the following facts and problems: the prior art has been directed to increasing the efficiency of glass production by increasing the amount of heat provided to the raw materials used to produce the glass. Therefore, the skilled person has a technical prejudice which leads the skilled person to think only of increasing the amount of heat supplied to the raw materials used for producing the glass in the face of the technical problem of how to improve the production efficiency of the glass.

After intensive research, a person skilled in the art finds that the temperature field in the furnace body of the kiln and the generated molten glass circulation not only have a great influence on the production efficiency of the glass, but also have a great influence on the quality of the glass, and the influence is more remarkable particularly on melting glass varieties with higher viscosity and improving the production capacity.

The invention aims to overcome the problems in the prior art and provides a furnace and a glass melting method implemented by using the furnace.

In order to achieve the above object, the present invention provides a glass melting method, which is implemented using a furnace comprising: the furnace body is provided with a first side wall and a second side wall which are opposite in a first horizontal direction, and a third side wall and a fourth side wall which are opposite in a second horizontal direction, at least one of a top wall and the first side wall of the furnace body is provided with a feeding hole, at least one of a bottom wall and the second side wall of the furnace body is provided with a discharging hole, and the furnace body comprises a plurality of heating zones which are arranged along the first horizontal direction; the burning guns are arranged on at least one of the third side wall and the fourth side wall, wherein each heating area is provided with at least one burning gun; the electrode is arranged on at least one of the third side wall and the fourth side wall, and preferably, the burning gun is positioned above the electrode; the glass melting method comprises the following steps: closing the discharge hole, adding raw materials into the furnace body through the feed inlet, utilizing the burning gun and the electrode to provide heat for the raw materials in the furnace body, wherein the oxygen-fuel volume ratio of the burning gun is within a preset range, and the fuel quantity of the burning gun in adjacent three heating areas meets a preset relationship.

By utilizing the glass melting method provided by the embodiment of the invention, the production efficiency of glass can be improved, the defects of bubbles, stripes and the like can be eliminated, the consistency and quality of the glass can be improved, and the energy consumption can be reduced.

Preferably, the burning guns comprise a first burning gun and a second burning gun, the first burning gun is arranged on the third side wall, and the second burning gun is arranged on the fourth side wall; the electrodes comprise a first electrode and a second electrode, the first electrode is arranged on the third side wall, and the second electrode is arranged on the fourth side wall.

Preferably, the glass melting method comprises the steps of: A) closing the discharge hole, adding raw materials into the furnace body through the feed hole, and providing heat for the raw materials in the furnace body by using the burning gun; B) when the material level of the raw materials in the furnace body reaches a first preset value, starting the electrode so as to provide heat for the raw materials in the furnace body; C) continuously adding raw materials into the furnace body through the feed inlet, and adjusting the fuel property and the fuel quantity of the burning gun so as to enable the oxygen-fuel volume ratio of the burning gun to be within the preset range and enable the fuel quantities of the burning gun positioned in three adjacent heating areas to meet the preset relationship; and D) continuing to add the raw materials into the furnace body through the feeding hole, and stopping adding the raw materials when the material level of the raw materials in the furnace body reaches a second preset value, preferably, the ratio of the first preset value to the second preset value is more than or equal to 0.2 and less than or equal to 0.4, and more preferably, the ratio of the first preset value to the second preset value is equal to 0.33.

Preferably, the glass melting method further comprises: E) after stopping adding the raw materials, heating the raw materials in the furnace body for a preset time under the condition that the preset range and the preset relation are met, preferably, the preset time is 24 hours to 96 hours, and preferably, the glass melting method further comprises the following steps: F) and heating the raw materials in the furnace body for the preset time, opening the discharge hole, and adding the raw materials into the furnace body through the feed hole.

Preferably, the step C) includes: c-1) continuously adding raw materials into the furnace body through the feeding hole, adjusting and keeping the total current value of the electrode at a third preset value, and adjusting and keeping the total fuel quantity of the burning gun at a fourth preset value; and C-2) adjusting the fuel property and the fuel quantity of the burning gun so as to enable the oxygen-fuel volume ratio of the burning gun to be within the preset range and the fuel quantity of the burning gun positioned in three adjacent heating areas to meet the preset relation.

Preferably, the oxygen-fuel volume ratio of the burning gun is (2-3): 1, preferably, the oxygen-fuel volume ratio of the burning gun is (2.3-2.7): 1, more preferably, the oxygen-fuel volume ratio of the burning gun is (2.45-2.55): 1.

preferably, under isothermal and isobaric conditions, the oxygen-fuel volume ratio of the burning gun is (2-3): 1, preferably, the oxygen-fuel volume ratio of the burning gun is (2.3-2.7): 1, more preferably, the oxygen-fuel volume ratio of the burning gun is (2.45-2.55): 1.

preferably, a first of said heating zones in adjacent three of said heating zones is adjacent said inlet port, a third of said heating zones in adjacent three of said heating zones is adjacent said outlet port, the sum of the fuel amounts of said burners in a first of said adjacent three of said heating zones is M1, the sum of the fuel amounts of said burners in a second of said adjacent three of said heating zones is M2, and the sum of the fuel amounts of said burners in a third of said adjacent three of said heating zones is M3, wherein 0.7. ltoreq. M1/M2. ltoreq.0.95, 1.3. ltoreq. M1+ M2)/M3. ltoreq.2, preferably, 0.72. ltoreq. M1/M2. ltoreq.0.91, 1.4. ltoreq. M1+ M2)/M3. ltoreq.1.9, more preferably, 0.77. ltoreq. M38/M2. ltoreq.85, 1.55. ltoreq. M1+ M2/M3/M75.

Preferably, the furnace body comprises three heating zones arranged along the first horizontal direction.

Preferably, a distance between the first side wall and the second side wall in the first horizontal direction is L, a length of each heating zone in the first horizontal direction is greater than or equal to 0.25L and less than or equal to 0.45L, preferably, a length of each heating zone in the first horizontal direction is greater than or equal to 0.3L and less than or equal to 0.35L, and more preferably, a length of each heating zone in the first horizontal direction is equal to 0.33L.

Drawings

FIG. 1 is a schematic structural diagram of a kiln according to an embodiment of the invention;

fig. 2 is a schematic structural diagram of a kiln according to an embodiment of the invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

A kiln 10 according to an embodiment of the present invention is described below with reference to the accompanying drawings. As shown in fig. 1 and 2, a furnace 10 according to an embodiment of the present invention includes a furnace body 110, a burning gun 120, and an electrode 130.

The furnace body 110 has first and

second side walls

111 and 112 opposed in a first horizontal direction and third and

fourth side walls

113 and 114 opposed in a second horizontal direction. At least one of the top wall 115 and the first side wall 111 of the furnace body 110 is provided with a feed inlet 151, and at least one of the bottom wall 116 and the second side wall 112 of the furnace body 110 is provided with a discharge outlet 152. The furnace body 110 includes a plurality of heating zones 117 arranged along the first horizontal direction.

A burning torch 120 is provided on at least one of the third and

fourth sidewalls

113 and 114, and at least one burning torch 120 is provided for each heating area 117. The electrode 130 is provided on at least one of the third and

fourth sidewalls

113 and 114. Wherein the first horizontal direction is shown by arrow a in fig. 2, the second horizontal direction is shown by arrow B in fig. 1, and the up-down direction is shown by arrow C in fig. 1.

The present invention also provides a glass melting method implemented using the furnace 10 according to an embodiment of the present invention, the glass melting method according to an embodiment of the present invention including the steps of: and closing the discharge hole 152, adding raw materials into the furnace body 110 through the feed hole 151, and providing heat to the raw materials in the furnace body 110 by using the burning guns 120 and the electrodes 130, wherein the oxygen-fuel volume ratio of the burning guns 120 is within a preset range, and the fuel quantity of the burning guns 120 positioned in the adjacent three

heating zones

117a, 117b and 117c meets a preset relationship. The oxygen-fuel volume ratio of the lance 120 refers to the volume ratio of oxygen and fuel injected by the lance 120. The fuel may be natural gas.

The glass melting method according to the embodiment of the present invention can precisely and timely adjust the temperature field in the furnace body 110 to generate a desired circulating flow of molten glass by setting the oxygen-fuel volume ratio of the burning torch 120 within a preset range and setting the fuel amounts of the burning torch 120 located in the adjacent three

heating zones

117a, 117b, 117c to satisfy a preset relationship.

Because the glass liquid circulation can be generated in the furnace body 110, that is, the glass liquid circulation exists in the furnace body 110, the melting of the glass liquid can be strengthened, so that the melting efficiency of the glass liquid is improved, the production efficiency of the glass is further improved, the glass liquid in the furnace body 110 can be more uniform and more uniform, the defects of bubbles, stripes and the like in the glass are eliminated, the consistency and the quality of the glass are improved, particularly, the production efficiency of the glass with higher melting viscosity can be improved, and the quality of the glass with higher melting viscosity is improved.

For example, a front circulation 161 and a rear circulation 162 can be generated in the furnace body 110, and the front circulation 161 and the rear circulation 162 are established and stabilized, so that the molten glass in the furnace body 110 is ensured to be molten, and thus, the production efficiency of the furnace 10 can be improved, and the quality of the glass can be improved.

Therefore, by using the glass melting method provided by the embodiment of the invention, the production efficiency of the glass can be improved, the defects such as bubbles and stripes can be eliminated, the consistency and quality of the glass can be improved, and the energy consumption can be reduced.

As shown in fig. 1 and 2, in some embodiments of the invention, the kiln 10 can include a furnace body 110, a lance 120, an electrode 130, and a temperature detector 140.

The furnace body 110 may have a first sidewall 111 and a second sidewall 112 opposite to each other in the first horizontal direction and a third sidewall 113 and a fourth sidewall 114 opposite to each other in the second horizontal direction, the first sidewall 111 may have a feed inlet 151, and the second sidewall 112 may have a feed outlet 152. Wherein the first horizontal direction may be perpendicular to the second horizontal direction.

The burning torch 120 may include a first burning torch 121 and a second burning torch 122, and the electrode 130 may include a first electrode 131 and a second electrode 132. The first burning torch 121 is provided on the third sidewall 113, and the second burning torch 122 is provided on the fourth sidewall 114. The first electrode 131 is disposed on the third sidewall 113, and the second electrode 132 is disposed on the fourth sidewall 114. The temperature detector 140 may be provided on the bottom wall 116.

Preferably, the first burning guns 121 may be plural, the second burning guns 122 may be plural, the plural first burning guns 121 may be provided on the third side wall 113 at intervals along the first horizontal direction, and the plural second burning guns 122 may be provided on the fourth side wall 114 at intervals along the first horizontal direction. The first electrode 131 may be a plurality of electrodes, the second electrode 132 may be a plurality of electrodes, the plurality of first electrodes 131 may be disposed on the third sidewall 113 at intervals along the first horizontal direction, and the plurality of second electrodes 132 may be disposed on the fourth sidewall 114 at intervals along the first horizontal direction.

Therefore, the molten glass in the furnace body 110 can be heated more uniformly, and the structure of the kiln 10 can be more reasonable.

More preferably, the first burning guns 121 may be disposed on the third sidewall 113 at equal intervals along the first horizontal direction, and the second burning guns 122 may be disposed on the fourth sidewall 114 at equal intervals along the first horizontal direction. The plurality of first electrodes 131 may be disposed on the third sidewall 113 at equal intervals along the first horizontal direction, and the plurality of second electrodes 132 may be disposed on the fourth sidewall 114 at equal intervals along the first horizontal direction. Therefore, the molten glass in the furnace body 110 can be heated more uniformly, and the structure of the kiln 10 can be more reasonable.

As shown in fig. 1, each of the first and second burning

guns

121 and 122 may be positioned above each of the first and

second electrodes

131 and 132. The construction of the kiln 10 can thus be made more rational.

A glass melting method according to an embodiment of the present invention may include the steps of:

A) closing the discharge hole 152, adding raw materials into the furnace body 110 through the feed hole 151, and providing heat for the raw materials in the furnace body 110 by using the burning gun 120;

B) when the material level of the raw material in the furnace body 110 reaches a first preset value, the electrode 130 is started so as to provide heat for the raw material in the furnace body 110;

C) continuously adding raw materials into the furnace body 110 through the feeding hole 151, and adjusting the fuel property and the fuel quantity of the burning torch 120 so that the oxygen-fuel volume ratio of the burning torch 120 is within the preset range, and the fuel quantities of the burning torch 120 positioned in the adjacent three

heating zones

117a, 117b and 117c satisfy the preset relationship; and

D) and continuously adding the raw materials into the furnace body 110 through the feeding hole 151, and stopping adding the raw materials when the material level of the raw materials in the furnace body 110 reaches a second preset value. Wherein, the material level of the raw material in the furnace body 110 may (possibly) reach the second preset value, and then the oxygen-fuel volume ratio of the burning torch 120 in the preset range and the fuel amount of the burning torch 120 in the adjacent three

heating zones

117a, 117b, 117c satisfy the preset relationship, that is, the process of adjusting the fuel property and the fuel amount of the burning torch 120 is relatively long; it is also possible (or possible) to first realize that the oxygen-fuel volume ratio of the burning torch 120 in the preset range and the fuel amount of the burning torch 120 in the adjacent three

heating zones

117a, 117b, 117c satisfy the preset relationship, that is, the process of adjusting the fuel property and the fuel amount of the burning torch 120 is relatively short, and then the material level in the furnace body 110 reaches the second preset value.

Preferably, a ratio of the first preset value to the second preset value may be greater than or equal to 0.2 and less than or equal to 0.4. Whereby the melting efficiency can be further improved. More preferably, the ratio of the first preset value to the second preset value may be equal to 0.33. Specifically, the second preset value may be 700 mm to 1000 mm.

In one embodiment of the present invention, the step C) may comprise:

c-1) continuously adding raw materials into the furnace body 110 through the feeding hole 151, adjusting and maintaining the total current value of the electrode 130 at a third preset value, and adjusting and maintaining the total fuel quantity of the burning gun 120 at a fourth preset value; and

c-2) adjusting the fuel property and the fuel amount of the lance 120 so that the oxygen-fuel volume ratio of the lance 120 within the preset range and the fuel amounts of the lances 120 located in the adjacent three

heating zones

117a, 117b, 117C satisfy the preset relationship. Wherein the kiln 10 may include a plurality of burning guns 120, the fuel property and the fuel amount of the burning guns 120 may be adjusted so that the fuel property and the fuel amount of different burning guns 120 are different from each other, or may be the same, or may be different, but the sum of the fuel amounts (total fuel amount) of the plurality of burning guns 120 is maintained at the fourth preset value.

By adjusting and maintaining the total current value of the electrode 130 at the third preset value and the total fuel amount of the burning torch 120 at the fourth preset value, not only the heat requirement of the molten glass can be better satisfied, but also the temperature field in the furnace body 110 can be more accurately and more rapidly adjusted so as to generate more ideal circulation of the molten glass.

The third preset value and the fourth preset value can be determined according to the types of raw materials, the yield (capacity) of the kiln 10, the variety of produced glass and other factors.

Specifically, the operating temperature of the molten glass in the furnace body 110 is 1530 ℃ to 1650 ℃, that is, the temperature of the molten glass in the furnace body 110 may be 1530 ℃ or higher and 1650 ℃ or lower.

The oxygen-to-fuel volume ratio of the lance 120 may be (2-3): 1. therefore, the temperature field in the furnace body 110 can be adjusted more accurately and more timely, and more ideal glass liquid circulation can be generated. Preferably, the oxygen-fuel volume ratio of the lance 120 may be (2.3-2.7): 1. more preferably, the oxygen-fuel volume ratio of the burning gun may be (2.45-2.55): 1.

preferably, the oxygen-fuel volume ratio of the above-mentioned burning torch 120 may be the oxygen-fuel volume ratio of the burning torch 120 under the isothermal and isobaric conditions. Specifically, if the temperature and/or pressure of the oxygen is not equal to the temperature and/or pressure of the fuel, the volume of the oxygen may be converted to the volume at the temperature and pressure of the fuel, or the volume of the fuel may be converted to the volume at the temperature and pressure of the oxygen, and then the oxygen-to-fuel volume ratio of the burner 120 may be calculated. Thereby more reasonably controlling the oxygen to fuel volume ratio of the lance 120.

A first heater zone 117a of the adjacent three

heater zones

117a, 117b, 117c may be adjacent to the inlet 151, and a third heater zone 117c of the adjacent three

heater zones

117a, 117b, 117c may be adjacent to the outlet 152. In other words, for the adjacent three

heating zones

117a, 117b, 117c, the first heating zone 117a is more adjacent to the feeding port 151 than the second heating zone 117b and the third heating zone 117c, and the third heating zone 117c is more adjacent to the discharging port 152 than the first heating zone 117a and the second heating zone 117 b.

The sum of the amounts of fuel of the burning guns 120 located at the first heating zone 117a of the adjacent three

heating zones

117a, 117b, 117c may be M1, the sum of the amounts of fuel of the burning guns 120 located at the second heating zone 117b of the adjacent three

heating zones

117a, 117b, 117c may be M2, and the sum of the amounts of fuel of the burning guns 120 located at the third heating zone 117c of the adjacent three

heating zones

117a, 117b, 117c may be M3. For example, there are five burning guns 120 located in the first heating area 117a, and the sum of the fuel amounts (injected) of these five burning guns 120 may be M1.

Wherein, M1/M2 is more than or equal to 0.7 and less than or equal to 0.95, and (M1+ M2)/M3 is more than or equal to 1.3 and less than or equal to 2. Therefore, the temperature field in the furnace body 110 can be adjusted more accurately and more timely, and more ideal glass liquid circulation can be generated. Preferably, 0.72. ltoreq. M1/M2. ltoreq.0.91, 1.4. ltoreq. M1+ M2)/M3. ltoreq.1.9. More preferably, 0.77. ltoreq. M1/M2. ltoreq.0.85, 1.55. ltoreq. M1+ M2)/M3. ltoreq.1.75.

As shown in fig. 2, in particular, the furnace body 110 may include three

heating zones

117a, 117b, 117c arranged in the first horizontal direction. Therefore, the difficulty of accurately and timely adjusting the temperature field in the furnace body 110 can be reduced under the condition of generating ideal glass liquid circulation. The heating zone 117 may be a portion of the furnace body 110 in fig. 2 between two adjacent dotted lines.

The distance between the first side wall 111 and the second side wall 112 in the first horizontal direction may be L, and the length of each heating area 117 in the first horizontal direction may be greater than or equal to 0.25L and less than or equal to 0.45L.

Preferably, the length of each heating region 117 in the first horizontal direction may be equal to or greater than 0.3L and equal to or less than 0.35L. More preferably, the length of each heating region 117 in the first horizontal direction may be equal to 0.33L. The range of movement of the boundary of each heating zone 117 can thereby be enlarged, so that the operational flexibility of the glass melting method can be increased.

For example, when the length of each heating zone 117 in the first horizontal direction is greater than or equal to 0.3L and less than or equal to 0.35L, the boundary of the second heating zone 117b may move 0.05L in the direction adjacent to the inlet 151 and 0.1L in the direction adjacent to the outlet 152.

In some examples of the invention, the glass melting method may further include:

E) after the addition of the raw material is stopped, the raw material in the furnace body 110 is heated for a preset time under the condition that the preset range and the preset relationship are satisfied. This further improves the consistency and quality of the glass. Preferably, the preset time may be 24 hours to 96 hours. More preferably, the preset time may be 48 hours to 72 hours.

In one example of the present invention, after heating for the preset time, all of the molten glass in the furnace body 110 may be discharged. The discharged molten glass can enter the next process. That is, the glass melting process may be performed intermittently.

In another example of the present invention, a glass melting method according to an embodiment of the present invention may further include: F) after the raw material in the furnace body 110 is heated for the preset time, the discharge port 152 is opened and the raw material is added into the furnace body 110 through the feed port 151. In other words, after the raw material in the furnace body 110 is heated for the predetermined time, the raw material is fed into the furnace body 110 through the feed inlet 151 while discharging the molten glass through the discharge outlet 152. That is, the glass melting method can be continuously performed.

Experimental example 1: the glass liquid flow is 8 tons/day, the product is TFT-LCD glass, wherein the oxygen-fuel ratio is 2.4, M1/M2 is 0.7, and (M1+ M2)/M3 is 2. The reject ratio of bubbles and stripes is less than 3 percent, and the product meets the quality requirement.

Experimental example 2: the glass liquid flow is 10 tons/day, the product is TFT-LCD glass, wherein the oxygen-fuel ratio is 2, M1/M2 is 0.95, and (M1+ M2)/M3 is 1.3. The reject ratio of bubbles and stripes is less than 3 percent, and the product meets the quality requirement.

Experimental example 3: the glass liquid flow rate is 14 tons/day, the product is LTPS glass, wherein the oxygen-fuel ratio is 3, and M1/M2 is 0.77, (M1+ M2)/M3 is 1.75. The defect rate of bubbles and stripes is less than 4.7 percent, and the product meets the quality requirement.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A glass melting method, characterized in that it is carried out with a furnace comprising:

the furnace body is provided with a first side wall and a second side wall which are opposite in a first horizontal direction, and a third side wall and a fourth side wall which are opposite in a second horizontal direction, at least one of a top wall and the first side wall of the furnace body is provided with a feeding hole, at least one of a bottom wall and the second side wall of the furnace body is provided with a discharging hole, and the furnace body comprises a plurality of heating zones which are arranged along the first horizontal direction;

the burning guns are arranged on at least one of the third side wall and the fourth side wall, wherein each heating area is provided with at least one burning gun; and

the electrode is arranged on at least one of the third side wall and the fourth side wall, and the burning gun is positioned above the electrode;

the glass melting method comprises the following steps: closing the discharge hole, adding raw materials into the furnace body through the feed hole, and providing heat for the raw materials in the furnace body by using the burning guns and the electrodes, wherein the oxygen-fuel volume ratio of the burning guns is within a preset range, and the fuel quantity of the burning guns positioned in three adjacent heating areas meets a preset relationship;

the first heating zone in the adjacent three heating zones is adjacent to the feeding hole, the third heating zone in the adjacent three heating zones is adjacent to the discharging hole, the sum of the fuel quantities of the burning guns in the first heating zone in the adjacent three heating zones is M1, the sum of the fuel quantities of the burning guns in the second heating zone in the adjacent three heating zones is M2, and the sum of the fuel quantities of the burning guns in the third heating zone in the adjacent three heating zones is M3, wherein the sum of the fuel quantities of the burning guns in the third heating zone in the adjacent three heating zones is M1/M2 is less than or equal to 0.95, and the sum of the fuel quantities of the burning guns in the third heating zone in the adjacent three heating zones is more than or equal to 1.3 (M1+ M2)/M3 is less than or equal to 2.

2. The glass melting method according to claim 1,

the burning guns comprise a first burning gun and a second burning gun, the first burning gun is arranged on the third side wall, and the second burning gun is arranged on the fourth side wall;

the electrodes comprise a first electrode and a second electrode, the first electrode is arranged on the third side wall, and the second electrode is arranged on the fourth side wall.

3. The glass melting method according to claim 1, comprising the steps of:

A) closing the discharge hole, adding raw materials into the furnace body through the feed hole, and providing heat for the raw materials in the furnace body by using the burning gun;

B) when the material level of the raw materials in the furnace body reaches a first preset value, starting the electrode so as to provide heat for the raw materials in the furnace body;

C) continuously adding raw materials into the furnace body through the feed inlet, and adjusting the fuel property and the fuel quantity of the burning gun so as to enable the oxygen-fuel volume ratio of the burning gun to be within the preset range and enable the fuel quantities of the burning gun positioned in three adjacent heating areas to meet the preset relationship; and

D) and continuously adding the raw materials into the furnace body through the feed inlet, and stopping adding the raw materials when the material level of the raw materials in the furnace body reaches a second preset value.

4. The glass melting method according to claim 3,

the ratio of the first preset value to the second preset value is greater than or equal to 0.2 and less than or equal to 0.4.

5. The glass melting method according to claim 4, wherein a ratio of the first preset value to the second preset value is equal to 0.33.

6. The glass melting method according to claim 3, wherein the glass melting method comprises:

E) and after the raw materials are stopped to be added, heating the raw materials in the furnace body for a preset time under the condition of meeting the preset range and the preset relation.

7. The glass melting method according to claim 6, wherein the predetermined time is 24 hours to 96 hours.

8. The glass melting method according to claim 6, wherein the glass melting method comprises: F) and heating the raw materials in the furnace body for the preset time, opening the discharge hole, and adding the raw materials into the furnace body through the feed hole.

9. The glass melting method according to claim 3, wherein the step C) comprises:

c-1) continuously adding raw materials into the furnace body through the feeding hole, adjusting and keeping the total current value of the electrode at a third preset value, and adjusting and keeping the total fuel quantity of the burning gun at a fourth preset value; and

c-2) adjusting the fuel property and the fuel quantity of the burning gun so as to enable the oxygen-fuel volume ratio of the burning gun to be within the preset range and the fuel quantity of the burning gun positioned in three adjacent heating areas to meet the preset relation.

10. The glass melting method according to claim 9, wherein the oxygen-fuel volume ratio of the burning lance is (2-3): 1.

11. the glass melting method according to claim 10, wherein the oxygen-fuel volume ratio of the burning lance is (2.3-2.7): 1.

12. the glass melting method of claim 11, wherein the oxygen to fuel volume ratio of the lance is (2.45-2.55): 1.

13. the glass melting method of claim 10, wherein the oxygen to fuel volume ratio of the lance is (2-3): 1.

14. the glass melting method of claim 13, wherein the oxygen-to-fuel volume ratio of the lance is (2.3-2.7): 1.

15. the glass melting method of claim 14, wherein the oxygen to fuel volume ratio of the lance is (2.45-2.55): 1.

16. the glass melting method as claimed in claim 1, wherein 0.72. ltoreq. M1/M2. ltoreq.0.91, 1.4. ltoreq. M1+ M2/M3. ltoreq.1.9.

17. The glass melting method of claim 16, wherein 0.77. ltoreq. M1/M2. ltoreq.0.85, 1.55. ltoreq. M1+ M2)/M3. ltoreq.1.75.

18. The glass melting method according to claim 1, wherein the furnace body includes three heating zones arranged in the first horizontal direction.

19. The glass melting method according to claim 18, wherein a distance between the first side wall and the second side wall in the first horizontal direction is L, and a length of each heating zone in the first horizontal direction is greater than or equal to 0.25L and less than or equal to 0.45L.

20. The glass melting method according to claim 19, wherein a length of each heating zone in the first horizontal direction is 0.3L or more and 0.35L or less.

21. The glass melting method of claim 20, wherein a length of each heating zone in the first horizontal direction is equal to 0.33L.