Process for improving color changing speed of float glass

Abstract

The invention relates to the technical field of glass color alteration, and discloses a process for improving the color alteration speed of float glass, which adopts an excessive color alteration method to alter the color of glass, and comprises the following steps: S1, providing a glass tank furnace which comprises a feeding port, a feeding port area, a hot spot area, a melting part, a neck and a cooling part which are arranged in sequence, an electric boosting system and bubbles are arranged at the tank bottom of the glass tank furnace, the molybdenum electrodes are located in a feeding port area and a hot spot area, and the bubbles are located in the hot spot area; s2, excessive pigment is provided, the pigment is injected into the feeding port area through the feeding port, so that the pigment and the colorless glass backing material are continuously mixed to form a batch, the batch is heated and molten in the melting part to form molten glass, and the molten glass penetrates through the neck and flows to the cooling part to be cooled. According to the color changing process provided by the invention, the color changing period can be effectively shortened, the color changing energy consumption is reduced, and the number of glass wastes in the color changing process is reduced, so that the production cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of glass color change, in particular to a process for improving the color change speed of float glass. Background Art

[0002] In float glass production, the cost of color change in large glass tank kilns is very high, and the loss of color change in one day may be hundreds of thousands. Currently, the excessive color change method is often used to shorten the color change cycle, that is, adding colorants higher / lower than the target value to the batch material, but this method has many problems. During the color change process, the melting part will have difficulties in melting, clarifying and homogenizing, and the temperature of the cooling part will also decrease.

[0003] To address the problem of low temperature in the cooling section, manufacturers usually adjust the depth of the neck water bag to increase the temperature. As for the problem in the melting section, they generally increase the melting temperature by increasing the gas volume in the glass tank kiln and increase the bubbling flow rate to strengthen the feeding reflux. However, the increase in bubbling flow rate will cause the temperature of the glass liquid in the cooling section to drop, resulting in a long process cycle for the existing color change process, high energy consumption for the color change method, and a large amount of waste glass during the color change period. Summary of the invention

[0004] In order to solve the technical problems existing in the background technology, the present invention proposes a process for increasing the color changing speed of float glass.

[0005] The present invention proposes a process for improving the color change speed of float glass, which uses an excessive color change method to change the color of the glass, comprising the following steps:

[0006] S1 provides a glass tank kiln, the glass tank kiln comprises a feeding port, a feeding port area, a hot spot area, a melting part, a neck, and a cooling part arranged in sequence, the tank bottom of the glass tank kiln is provided with an electric fluxing system and a bubbler, the molybdenum electrode is located in the feeding port area and the hot spot area, and the bubbler is located in the hot spot area;

[0007] S2 provides an excess of colorant, which is injected into the feeding port area through the feeding port, so that the colorant and the colorless glass base material are continuously mixed to form a batch material, and the batch material is heated and melted in the melting part to form glass liquid, and the glass liquid passes through the neck and flows to the cooling part for cooling;

[0008] S3 increases the total daily gas consumption of the glass tank kiln before over-feeding begins;

[0009] At the beginning of over-feeding in S4, the total power of the bubbling and electric boosting systems is synchronously loaded to the maximum value.

[0010] As a further optimized solution of the present invention, the electric fluxing system adopts molybdenum electrodes, and the molybdenum electrodes are loaded with power once during the color change of float glass. The loading power of the molybdenum electrodes located in the feeding port area is 30%-40%, and the loading power of the molybdenum electrodes located in the hot spot area is 60%-70%.

[0011] As a further optimized solution of the present invention, the feed inlet area and the hot spot area both have two rows of molybdenum electrodes, and the loading power of each row of molybdenum electrodes located in the feed inlet area is 15%-20%, and the loading power of each row of molybdenum electrodes located in the hot spot area is 30%-35%.

[0012] As a further optimized solution of the present invention, a plurality of temperature measuring points are arranged at the bottom of the glass tank kiln.

[0013] As a further optimized solution of the present invention, the number of the temperature measuring points is ten, and the ten temperature measuring points are evenly distributed along the center line direction of the bottom of the glass tank kiln.

[0014] As a further optimized solution of the present invention, the bubbling is a double-water-cooled bubbling.

[0015] As a further optimized solution of the present invention, the glass pool kiln also includes a crown, a right wall, a rear gable, a left wall and a front wall. The rear gable is opposite to the front wall, and the front wall is arranged on the side away from the neck. The feeding port is arranged in the middle of the front wall, and the number of the feeding ports is two and they are horizontally symmetrically distributed.

[0016] As a further optimized solution of the present invention, the glass tank kiln also includes several pairs of small furnaces, which are symmetrically installed on the right wall and the left wall. The several pairs of small furnaces are burned in the upper part of the inner cavity of the glass tank kiln to form a flame space.

[0017] The process for increasing the color changing speed of float glass proposed by the present invention has the following beneficial effects:

[0018] By simultaneously installing an electric boosting system and a water-cooled bubbling system in the glass tank kiln, the total daily gas consumption of the glass tank kiln is increased before the start of over-feeding. When the over-feeding starts, the total power of the bubbling and electric boosting systems is synchronously loaded to the maximum value. This color change process has achieved significant results in glass tank kiln color change experiments of different scales. It can effectively shorten the color change cycle, reduce the energy consumption of color change, and reduce the amount of waste glass in the color change process, thereby reducing production costs and improving production efficiency.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the front cross-sectional structure of the glass tank kiln in the first embodiment provided by the present invention;

[0021] Figure 2 This is a schematic diagram of a top cross-sectional structure of a glass tank kiln in Example 1 provided by the present invention;

[0022] Figure 3 This is a schematic diagram of the front cross-sectional structure of the glass tank kiln in the second embodiment provided by the present invention;

[0023] Figure 4 This is a schematic diagram of a top cross-sectional structure of a glass tank kiln in the second embodiment provided by the present invention;

[0024] Figure 5 This is a schematic diagram of the front cross-sectional structure of the glass tank kiln in the third embodiment provided by the present invention;

[0025] Figure 6 This is a schematic diagram of the top cross-sectional structure of the glass tank kiln in Example 3 provided by the present invention.

[0026] Description of the drawings: 1. Molybdenum electrode; 2. Water-cooled bubbler; 3. Pool bottom; 4. Glass liquid surface pile in melting section; 5. Melting section; 6. Neck clamp; 7. Cooling section; 8. Small furnace; 9. Arch top; 10. Right wall; 11. Back gable; 12. Left wall; 13. Front wall; 14. Feeding port; 15. Temperature measuring point. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] A process for increasing the color change speed of float glass, using an excessive color change method to change the color of the glass, comprising the following steps:

[0030] S1 provides a glass tank kiln, the glass tank kiln comprises a feeding port, a feeding port area, a hot spot area, a melting part, a neck, and a cooling part arranged in sequence, the tank bottom of the glass tank kiln is provided with an electric fluxing system and a bubbler, the molybdenum electrode is located in the feeding port area and the hot spot area, and the bubbler is located in the hot spot area;

[0031] S2 provides an excess of colorant, which is injected into the feeding port area through the feeding port, so that the colorant and the colorless glass base material are continuously mixed to form a batch material, and the batch material is heated and melted in the melting part to form glass liquid, and the glass liquid passes through the neck and flows to the cooling part for cooling;

[0032] S3 increases the total daily gas consumption of the glass tank kiln before over-feeding begins;

[0033] At the beginning of over-feeding in S4, the total power of the bubbling and electric boosting systems is synchronously loaded to the maximum value.

[0034] Specifically, the electric fluxing system uses molybdenum electrodes, and the molybdenum electrodes are loaded with power once during the float glass color change period. The molybdenum electrodes located in the feeding port area are loaded with power of 30%-40%, while the molybdenum electrodes located in the hot spot area are loaded with power of 60%-70%.

[0035] Specifically, the feed inlet area and the hot spot area both have two rows of molybdenum electrodes, and the loading power of each row of molybdenum electrodes located in the feed inlet area is 15%-20%, and the loading power of each row of molybdenum electrodes located in the hot spot area is 30%-35%.

[0036] Specifically, a plurality of temperature measuring points are arranged at the bottom of the glass tank kiln.

[0037] Furthermore, the number of the temperature measuring points is ten, and the ten temperature measuring points are evenly distributed along the center line direction of the bottom of the glass tank kiln.

[0038] Specifically, the bubbling is a double-row water-cooled bubbling.

[0039] Specifically, the glass pool kiln also includes a crown, a right wall, a rear gable, a left wall and a front wall. The rear gable is opposite to the front wall, and the front wall is arranged on the side away from the neck. The feeding port is arranged in the middle of the front wall, and there are two feeding ports, which are horizontally symmetrically distributed.

[0040] Specifically, the glass tank kiln further comprises a plurality of pairs of small furnaces, which are symmetrically installed on the right wall and the left wall, and the flame space is formed by burning in the upper part of the inner cavity of the glass tank kiln through the plurality of pairs of small furnaces.

[0041] Embodiment 1

[0042] On the basis of excessive color change, the electric fluxing system and bubbling are combined to change the color of black glass to ordinary white glass, as follows:

[0043] Among them, black glass contains the following ingredients and their mass percentages: quartz sandstone powder 39.3%, soda ash 10.4%, limestone 6.5%, feldspar 3.9%, dolomite 10.1%, broken glass 20%, sodium sulfate 2%, carbon powder 0.5%, iron oxide 2.9%;

[0044] Ordinary white glass contains the following ingredients and their mass percentages: quartz sandstone powder 46.9%, soda ash 11.5%, limestone 7.1%, feldspar 6.1%, dolomite 10.8%, broken glass 15%, sodium sulfate 3%, carbon powder 0.5%, iron oxide 0.02%;

[0045] like Figure 1 and Figure 2 As shown, a process for improving the color-changing speed of float glass is used, and a 260t / d glass tank kiln is selected. The interior of the glass tank kiln includes four rows of molybdenum electrodes 1, a water-cooled bubbler 2, a tank bottom 3, a melting part 5, a neck 6, and a cooling part 7. The four rows of molybdenum electrodes 1 are divided into two groups and are respectively arranged in a feeding port area and a hot spot area. The water-cooled bubbler 2 is arranged at the melting part 5. The melting part 5 has a glass liquid surface pile 4. The upper part of the glass tank kiln consists of five pairs of small furnaces 8 symmetrically distributed on the left and right sides of the glass tank kiln and burning to form a flame space. The top of the glass tank kiln is a crown 9. The wall of the glass tank kiln includes a right wall 10, a front wall 13, a left wall 12, and a rear gable 11. The front wall 13 has two feeding ports 14, and 10 (①~⑩) temperature measuring points 15 are arranged along the center line direction of the tank bottom.

[0046] Before over-feeding begins, increase the total daily gas consumption of the glass tank furnace by 5%;

[0047] At the beginning of overfeeding, the double-row water-cooled bubbler 2 has a maximum synchronous loading of 17 L / min;

[0048] The total power of the molybdenum electrode 1 of the electric boosting system is synchronously loaded to the planned maximum value at the beginning of excessive feeding. During the color change process of the 260t / d glass tank kiln, the power loading distribution ratio and value of the feeding port area and the hot spot area are as follows:

[0049] area Feeding port area Hotspots percentage(%) 35.9 64.1 Power (kW) 280 500

[0050] In this embodiment of the electric boosting system, the power distribution ratio corresponding to the four rows of molybdenum electrodes 1 after power is applied is as follows:

[0051] area 1 2 3 4 percentage(%) 17.95 17.95 32.05 32.05 Power (kW) 140 140 250 250

[0052] The instantaneous temperature distribution of each temperature measuring point on the bottom of the glass tank kiln of this embodiment before color change, after color change without electric fluxing, and after color change with electric fluxing is shown in the following table:

[0053] Temperature measurement point Before color change Without electric fluxing and color change After changing color with electric flux ① 986.8 1037.6 1050.5 ② 982.5 1042.6 1055.3 ③ 994.9 1043.6 1056.9 ④ 991.7 1054.9 1060.2 ⑤ 1000.5 1061.4 1071.4 ⑥ 1005.1 1058.9 1065.6 ⑦ 984.5 1047.1 1053.1 ⑧ 977.4 1045.3 1049.4 ⑨ 881.4 990.4 995.3 ⑩ 867.4 985.6 987.6

[0054] After the color change is completed, turn off the electric fluxing system, reduce the bubbling flow rate, and resume normal production;

[0055] Before the electric fluxing system was put into use, the period of changing the color of the black glass in the glass tank kiln of this embodiment to white glass was about 15 days. After the electric fluxing system was put into use, the period of changing the color of the black glass in the glass tank kiln of this embodiment to white glass was about 10 days, saving 5 days of time.

[0056] The experimental results show that the color change cycle is significantly shortened after installing the electric fluxing system.

[0057] Embodiment 2

[0058] On the basis of excessive color change, the gray glass is changed to black glass by combining the electric fluxing system and bubbling, as follows:

[0059] The gray glass contains the following components and their mass percentages: quartz sandstone powder 35.3%, soda ash 10.2%, limestone 5.8%, feldspar 3.9%, dolomite 8.1%, broken glass 30%, sodium sulfate 2%, carbon powder 0.5%, iron sulfide 1.0%, cobalt oxide 1.5%, cuprous oxide 0.04%;

[0060] Black glass contains the following ingredients and their mass percentages: quartz sandstone powder 40.1%, soda ash 11.5%, limestone 8.2%, feldspar 4.6%, dolomite 8.8%, broken glass 30%, sodium sulfate 2%, carbon powder 0.5%, iron oxide 3.0%;

[0061] like Figure 1 and Figure 2 As shown, a process for improving the color change speed of float glass is selected. A 600t / d glass tank kiln is selected. The interior of the glass tank kiln includes four rows of molybdenum electrodes 1, a water-cooled bubbler 2, a tank bottom 3, a melting part 5, a neck 6, and a cooling part 7. The four rows of molybdenum electrodes 1 are divided into two groups and are respectively arranged in a feeding port area and a hot spot area. The water-cooled bubbler 2 is arranged at the melting part 5. The melting part 5 has a glass liquid surface pile 4. The upper part of the glass tank kiln consists of six pairs of small furnaces 8 symmetrically distributed on the left and right sides of the glass tank kiln and burning to form a flame space. The top of the glass tank kiln is a crown 9. The wall of the glass tank kiln includes a right wall 10, a front wall 13, a left wall 12, and a rear gable 11. The front wall 13 has two feeding ports 14, and 10 (①~⑩) temperature measuring points 15 are arranged along the center line direction of the tank bottom.

[0062] Before over-feeding begins, increase the total daily gas consumption of the glass tank furnace by 3%;

[0063] Double-row water cooling bubbling 2 starts with overfeeding, with a maximum synchronous loading of 20L / min;

[0064] The total power of the molybdenum electrode 1 of the electric boosting system is synchronously loaded to the planned maximum value at the beginning of excessive feeding. During the color change process of the 600t / d glass tank furnace, the power loading distribution ratio and value of the feeding port area and the hot spot area are as follows:

[0065] area Feeding port area Hotspots percentage(%) 35 65 Power (kW) 600 1100

[0066] In this embodiment of the electric boosting system, the power distribution ratio corresponding to the four rows of molybdenum electrodes 1 after power is applied is as follows:

[0067] area 1 2 3 4 percentage(%) 17.5 17.5 32.5 32.5 Power (kW) 300 300 550 550

[0068] The instantaneous temperature distribution of each temperature measuring point on the bottom of the glass tank kiln of this embodiment before color change, after color change without electric fluxing, and after color change with electric fluxing is shown in the following table:

[0069] Temperature measurement point Before color change Without electric fluxing and color change After changing color with electric flux ① 949.1 955.2 960.4 ② 952.4 960.1 965.7 ③ 957.1 962.4 970.1 ④ 959.3 966.1 974.5 ⑤ 969.5 973.1 980.4 ⑥ 975.4 980.4 985.6 ⑦ 970.8 975.3 980.1 ⑧ 874.1 860.1 867.9 ⑨ 863.7 850.6 854.1 ⑩ 893.2 877.4 886.7

[0070] After the color change is completed, turn off the electric fluxing system, reduce the bubbling flow rate, and resume normal production;

[0071] Before the electric fluxing system is installed, the period of changing the color of the gray glass of the glass tank kiln in this embodiment to black glass is about 100 hours. After the electric fluxing system is installed, the period of changing the color of the gray glass of the glass tank kiln in this embodiment to black glass is about 50 hours, saving 50 hours of time.

[0072] The experimental results show that the color change cycle is significantly shortened after installing the electric fluxing system.

[0073] Embodiment 3

[0074] On the basis of excessive color change, the gray glass is changed to ordinary white glass by combining the electric fluxing system and bubbling, as follows:

[0075] The gray glass contains the following components and their mass percentages: quartz sandstone powder 43.1%, soda ash 10.2%, limestone 7.8%, feldspar 4.6%, dolomite 8.1%, broken glass 15%, sodium sulfate 2%, carbon powder 0.5%, iron sulfide 1.0%, cobalt oxide 2.0%, cuprous oxide 0.04%;

[0076] Ordinary white glass contains the following ingredients and their mass percentages: quartz sandstone powder 45.1%, soda ash 11.5%, limestone 8.2%, feldspar 4.6%, dolomite 8.8%, broken glass 15%, sodium sulfate 2%, carbon powder 0.5%, iron oxide 1.0%;

[0077] like Figure 1 and Figure 2As shown, a process for improving the color change speed of float glass is selected. A 1000t / d glass tank kiln is selected. The interior of the glass tank kiln includes four rows of molybdenum electrodes 1, a water-cooled bubbler 2, a tank bottom 3, a melting part 5, a neck 6, and a cooling part 7. The four rows of molybdenum electrodes 1 are divided into two groups and are respectively arranged in a feeding port area and a hot spot area. The water-cooled bubbler 2 is arranged at the melting part 5. The melting part 5 has a glass liquid surface pile 4. The upper part of the glass tank kiln consists of eight pairs of small furnaces 8 symmetrically distributed on the left and right sides of the glass tank kiln and burning to form a flame space. The top of the glass tank kiln is a crown 9. The wall of the glass tank kiln includes a right wall 10, a front wall 13, a left wall 12, and a rear gable 11. The front wall 13 has two feeding ports 14, and 10 (①~⑩) temperature measuring points 15 are arranged along the center line direction of the tank bottom.

[0078] Before over-feeding begins, increase the total daily gas consumption of the glass tank furnace by 7%;

[0079] Double-row water cooling bubbling 2 starts with overfeeding, with a maximum synchronous loading of 30L / min;

[0080] The total power of the molybdenum electrode 1 of the electric boosting system is synchronously loaded to the planned maximum value at the beginning of excessive feeding. During the color change process of the 1000t / d glass tank kiln, the power loading distribution ratio and value of the feeding port area and the hot spot area are as follows:

[0081] area Feeding port area Hotspots percentage(%) 38 62 Power (kW) 570 930

[0082] In this embodiment of the electric boosting system, the power distribution ratio corresponding to the four rows of molybdenum electrodes 1 after power is applied is as follows:

[0083] area 1 2 3 4 percentage(%) 19 19 31 31 Power (kW) 285 285 465 465

[0084] The instantaneous temperature distribution of each temperature measuring point on the bottom of the glass tank kiln of this embodiment before color change, after color change without electric fluxing, and after color change with electric fluxing is shown in the following table:

[0085] Temperature measurement point Before color change Without electric fluxing and color change After changing color with electric flux ① 993 1054.1 1055.4 ② 989.1 1040.2 1042.7 ③ 992.2 1051.2 1053.6 ④ 1014.1 1070.4 1073.1 ⑤ 1012.3 1067.8 1069.8 ⑥ 1013.7 1069.4 1070.3 ⑦ 1083.4 1140.7 1142.7 ⑧ 1113.6 1161.1 1164.7 ⑨ 892.3 937.1 949.4 ⑩ 877.1 910.4 938.9

[0086] After the color change is completed, turn off the electric fluxing system, reduce the bubbling flow rate, and resume normal production;

[0087] Before the electric fluxing system is installed, the period of changing the color of the gray glass of the glass tank kiln in this embodiment to white glass is about 10 days. After the electric fluxing system is installed, the period of changing the color of the gray glass of the glass tank kiln in this embodiment to white glass is about 6 days, saving 4 days of time.

[0088] The experimental results show that the color change cycle is significantly shortened after installing the electric fluxing system.

[0089] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A process for increasing the color change speed of float glass, using an excessive color change method to change the color of the glass, characterized in that: The following steps are involved: S1 provides a glass tank kiln, the glass tank kiln comprises a feeding port, a feeding port area, a hot spot area, a melting part, a neck, and a cooling part arranged in sequence, the tank bottom of the glass tank kiln is provided with an electric fluxing system and a bubbler, the molybdenum electrode is located in the feeding port area and the hot spot area, and the bubbler is located in the hot spot area; S2 provides an excess of colorant, which is injected into the feeding port area through the feeding port, so that the colorant and the colorless glass base material are continuously mixed to form a batch material, and the batch material is heated and melted in the melting part to form glass liquid, and the glass liquid passes through the neck and flows to the cooling part for cooling; S3 increases the total daily gas consumption of the glass tank kiln before over-feeding begins; At the beginning of over-feeding in S4, the total power of the bubbling and electric boosting systems is synchronously loaded to the maximum value.

2. A process for increasing the color change speed of float glass according to claim 1, characterized in that: The electric fluxing system uses molybdenum electrodes, and the molybdenum electrodes are loaded with power once during the float glass color change period. The molybdenum electrodes located in the feeding port area are loaded with power of 30%-40%, while the molybdenum electrodes located in the hot spot area are loaded with power of 60%-70%.

3. A process for increasing the color change speed of float glass according to claim 2, characterized in that: The feed inlet area and the hot spot area both have two rows of molybdenum electrodes. The loading power of each row of molybdenum electrodes in the feed inlet area is 15%-20%, and the loading power of each row of molybdenum electrodes in the hot spot area is 30%-35%.

4. A process for increasing the color change speed of float glass according to claim 1, characterized in that: The bottom of the glass tank kiln is provided with a plurality of temperature measuring points.

5. A process for increasing the color change speed of float glass according to claim 4, characterized in that: The number of the temperature measuring points is ten, and the ten temperature measuring points are evenly distributed along the center line of the bottom of the glass tank kiln.

6. A process for increasing the color change speed of float glass according to claim 1, characterized in that: The bubbling is a double-row row cooling bubbling.

7. A process for increasing the color change speed of float glass according to claim 1, characterized in that: The glass pool kiln also includes a crown, a right wall, a rear gable, a left wall and a front wall. The rear gable is opposite to the front wall, and the front wall is arranged on the side away from the neck. The feeding port is arranged in the middle of the front wall, and there are two feeding ports, which are horizontally symmetrically distributed.

8. The process for increasing the color change speed of float glass according to claim 6, characterized in that: The glass tank kiln also includes a plurality of pairs of small furnaces, which are symmetrically installed on the right wall and the left wall. The plurality of pairs of small furnaces burn in the upper part of the inner cavity of the glass tank kiln to form a flame space.

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