A platinum channel repair method

Abstract

The present invention discloses a method for repairing a platinum channel under a high temperature state, and belongs to the technical field of high temperature maintenance of glass furnace channels. When the platinum channel tube body is continuously used under a high temperature state, it is eroded by foreign matter brought in by the internal glass liquid or by external factors, resulting in sand holes, micropores or penetration holes on the tube body surface. In order to extend the service life of the platinum, this method is especially used to repair the platinum under a high temperature state. This method repairs the local repair area in sequence by a variety of methods such as spraying, pasting and welding, with a total of four layers of structure, namely, a fusion layer, a structural layer, a protective layer and a thermal insulation layer. The method described in the present invention is used to perform hot repairs on the eroded parts of the platinum channel tube body under a high temperature state. The use of the method described in the present invention can extend the service life of the platinum channel and reduce the cost of using glass equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of high-temperature maintenance of glass furnace channels, and in particular relates to a method for repairing a platinum channel. Background Art

[0002] The furnace channel is the channel connecting the glass tank furnace and the feeder. After the glass liquid passes through the cooling section and the regulating section of the channel, it obtains a uniform and stable temperature for molding. The working state of the channel directly affects the quality of the formed glass flow and the output, especially when producing special glass and lightweight glass. If there is no ideal channel, stable production is impossible.

[0003] The operating temperature of the platinum channel is above 1500℃. Due to long-term high-temperature operation, the outer surface of the platinum channel is oxidized by oxygen and volatilized, causing the platinum tube wall to become thinner, and the platinum tube body to have problems such as sand holes and leaks, which leads to glass liquid leakage, resulting in equipment damage and production line shutdown. After the platinum equipment is cooled, cold maintenance and replacement are carried out, which restricts production costs and production efficiency. The operation time of the platinum channel equipment is basically one and a half to two years. In the later stage of operation, its loss rate is as high as 5-10% of the total weight. The service life of the platinum channel is short and the maintenance cost is high. Summary of the invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a platinum channel repair method, which is used to hot-repair the eroded parts of the platinum channel tube body under high temperature during use. The method of the present invention can extend the service life of the platinum channel and reduce the use cost of glass equipment.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention provides a platinum channel repair method, comprising the following steps:

[0007] During the use of the pipeline, a fusion layer for blocking leakage is set on the surface of the damaged part of the platinum pipeline; a structural layer is set on the upper surface of the fusion layer, and the structural layer is made of platinum alloy; a protective layer for preventing oxidation corrosion of the platinum alloy is set on the upper surface of the structural layer; and finally, a thermal insulation layer for heat preservation is set on the upper surface of the protective layer.

[0008] The present invention further comprises, by mass percentage, raw materials of the welded layer including SiO2: 40% to 45%, Al2O3: 10% to 20%, Na2O: 10% to 20%, TiO2: 2% to 5%, ZrO2: 2% to 5% and SnO2: 2% to 5%.

[0009] The present invention further comprises that, in terms of mass percentage, the structural layer is a platinum alloy product containing PtO2: 40% to 45% and Rh2O3: 55% to 60%.

[0010] According to the present invention, the platinum alloy product is in the shape of a round thin sheet or a long thin sheet.

[0011] The present invention further comprises, by mass percentage, raw materials of the protective layer including ZrO2: 40% to 50%, Y2O3: 40% to 50%, TiO2: 2% to 5%, Al2O3: 5% to 10%, and Na2O: 5% to 10%.

[0012] The present invention further comprises, by mass percentage, raw materials of the thermal insulation layer including Al2O3: 50% to 60%, TiO2: 2% to 5%, Fe2O3: 1% to 2%, and Na2O: 30% to 40%.

[0013] According to the present invention, the fusion layer is provided by spraying or pasting, the structural layer is provided by pasting or welding, and the protective layer and the thermal insulation layer are provided by any one of spraying, pasting or welding.

[0014] The present invention further provides that the spraying method is to mix and grind the raw materials into nanometer-scale powder, and then heat and heat the powder until the temperature reaches 800-1200° C. before coating the powder through a spraying device.

[0015] The present invention further provides that the pasting method is to mix and grind the raw materials into nanometer-scale powder, and then heat and heat the mixture until the temperature reaches 900-1000°C, add an adhesive and stir until the mixture is in a slurry state, and then apply the mixture by physical winding and brushing.

[0016] The present invention further provides that the welding method is to heat the raw material to a temperature of 900-1000°C, then place the raw material in close contact with the desired part and use electric welding equipment to perform surfacing treatment on the surface joints.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention provides a method for repairing a platinum channel. When the platinum channel is in use and the temperature of the pipeline is above 1500°C, the corroded part of the platinum channel tube body is hot-repaired. That is, the method can repair the platinum pipeline at a high temperature without stopping the production line. The powder particles of the fusion layer repair and fuse the surface of the leaking glass liquid area, which has a certain solidification effect on the leaking liquid glass liquid. At least in a short period of time under high temperature conditions, the leaking glass will not continue to leak outward in liquid form. The leakage is blocked before the connection of the platinum alloy product of the next structural layer can be carried out. If the fusion layer is not provided, the structural layer will not be implemented or will be extremely difficult. The structural layer is made of platinum alloy, and a protective layer is then covered on the structural layer to solve the problem of easy oxidation and corrosion of platinum products under high temperature conditions, and a layer of protection treatment is performed. Similarly, in order to insulate the repaired area, an insulation layer is provided on the protective layer, and the damaged repaired part is subjected to overall insulation treatment. The repair method reduces the prerequisites for repairing platinum equipment, avoids the time cost spent on stopping production to cool down and then heating up again, and reduces the repair time of platinum equipment; extends the service life of platinum equipment and reduces the cost of repair and replacement of glass equipment; avoids the secondary damage to the platinum tube body caused by the repeated expansion and contraction of platinum metal caused by cooling and then heating up; and can be applied to the damaged surface of any eroded area on the platinum channel tube body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the damaged area of ​​the platinum pipe of the present invention;

[0020] Figure 2 It is a schematic diagram of the hot repair method of the present invention;

[0021] Among them: 1-Platinum pipe; 2-Sand holes and erosion micropores; 3-Penetration holes; 4-Welding layer; 5-Structural layer; 6-Protective layer; 7-Insulation layer. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0025] When the tube body of the platinum channel 1 is continuously used under high temperature, it is corroded by foreign matter brought in by the internal glass liquid or by external factors, resulting in sand holes, micropores or penetration holes on the surface of the tube body. In order to extend the service life of the platinum, this method is used to repair the platinum under high temperature.

[0026] See also Figure 1 In the normal production process of the glass furnace, the high-temperature molten glass continuously flows through the platinum pipe 1 into the next device. When the platinum pipe is continuously washed by the high-temperature glass for a long time, high-temperature erosion will occur, and then sand holes and micropores will appear. 2, and further erosion through the micropores will increase the erosion area, resulting in the appearance of penetration holes 3.

[0027] This method uses a variety of methods such as spraying, pasting and welding. When the pipeline is in high temperature, that is, the platinum channel is in normal use (temperature above 1500°C), the local repair area is repaired in sequence by a fusion layer 4, a structural layer 5, a protective layer 6 and a thermal insulation layer 7. A total of four layers of structural repair are performed. A fusion layer 4 is set on the surface of the damaged part of the platinum pipeline 1. The fusion layer 4 is used to block leakage. A structural layer 5 is set on the upper surface of the fusion layer 4. The structural layer 5 is a platinum alloy product. A protective layer 6 is set on the upper surface of the structural layer 5. The protective layer 6 is used to solve the problem of easy oxidation corrosion of platinum products under high temperature conditions. Then, a thermal insulation layer 7 is set on the upper surface of the protective layer 6. The thermal insulation layer 7 is used for heat preservation. The sequence is to complete a layer of structural repair from the inside to the outside along the platinum pipeline 1 first, and then perform the next layer of repair in a layer-by-layer progressive mode.

[0028] A method for repairing a platinum channel under high temperature conditions comprises the following steps:

[0029] like Figure 2As shown, firstly, the surface of the sand holes, erosion micropores 2 and penetration holes 3 of the platinum pipe 1 is cleaned to remove surface impurities;

[0030] In terms of mass percentage, a fusion bonding layer 4 is provided on the surface of the damaged part of the platinum pipe 1 by a spraying method or a pasting method, wherein the raw materials of the fusion bonding layer 4 are SiO2: 40% to 45%, Al2O3: 10% to 20%, Na2O: 10% to 20%, TiO2: 2% to 5%, ZrO2: 2% to 5% and SnO2: 2% to 5%;

[0031] A structural layer 5 is provided on the upper surface of the fusion layer 4 by a pasting method or a welding method; the structural layer 5 is a platinum-rhodium alloy product containing PtO2: 40% to 45% and Rh2O3: 55% to 60%. The platinum-rhodium alloy product is in the shape of a round thin sheet or a long thin sheet;

[0032] A protective layer 6 is provided on the upper surface of the structural layer 5 by any one of a spraying method, a bonding method or a welding method; the raw materials of the protective layer 6 are ZrO2: 40% to 50%, Y2O3: 40% to 50%, TiO2: 2% to 5%, Al2O3: 5% to 10%, and Na2O: 5% to 10%;

[0033] Then, a thermal insulation layer 7 is arranged on the upper surface of the protective layer 6 by any one of spraying, pasting or welding methods; the raw materials of the thermal insulation layer 7 are Al2O3: 50% to 60%, TiO2: 2% to 5%, Fe2O3: 1% to 2%, and Na2O: 30% to 40%.

[0034] The spraying method is to mix and grind the raw materials into nanometer-level powder, and then heat and heat the powder until the temperature reaches 800-1200° C. before applying the powder through a spraying device.

[0035] The pasting method is to mix and grind the raw materials into nano-scale powder, then heat and heat it to 1000°C, add an adhesive and stir until the mixture is in a slurry state, and then apply the mixture by physical winding and brushing.

[0036] The welding method is to heat the raw material to a temperature of 1000°C, then place the raw material in close contact with the desired part and use electric welding equipment to perform surfacing treatment on the surface joints.

[0037] As an optional solution, the platinum channel repair method under high temperature conditions comprises the following steps:

[0038] The raw materials SiO2: 40% to 45%, Al2O3: 10% to 20%, Na2O: 10% to 20%, TiO2: 2% to 5%, ZrO2: 2% to 5% and SnO2: 2% to 5% are mixed in advance and ground into nano-scale powders. Then, the powders are coated on the surfaces of the sand holes, erosion micropores 2 and penetration holes 3 of the damaged parts of the platinum pipe 1 by high-temperature spraying equipment to form a fusion layer 4.

[0039] A platinum-rhodium alloy product (such as round thin sheets, long thin sheets, etc. cut according to the shape of the eroded part) containing PtO2: 40% to 45% and Rh2O3: 55% to 60% is initially heated at high temperature. Then the platinum product is closely attached to the surface of the fusion layer 4 on the platinum pipe 1 to be repaired, and an electric welding device is used to perform a surfacing treatment on the joint between the product and the pipe to form a structural layer 5.

[0040] The raw materials ZrO2: 40% to 50%, Y2O3: 40% to 50%, TiO2: 2% to 5%, Al2O3: 5% to 10%, and Na2O: 5% to 10% are mixed and ground into nano-scale powder, and then coated on the surface of the structural layer 5 of the welded platinum product by high-temperature spraying equipment to form a protective layer 6.

[0041] The raw material powders of Al2O3: 50% to 60%, TiO2: 2% to 5%, Fe2O3: 1% to 2%, and Na2O: 30% to 40% are mixed and ground into nano-scale powders, and a binder is added to make it into slurry. The mixed refractory material is applied to the outer surface of the protective layer 6 by a physical high-temperature brushing method to form a thermal insulation layer 7.

[0042] Example 1

[0043] A method for repairing a platinum channel under high temperature conditions comprises the following steps:

[0044] The raw materials SiO2: 45%, Al2O3: 20%, Na2O: 10%, TiO2: 2%, ZrO2: 5% and SnO2: 5% are mixed in advance and ground into nano-scale powders, and then heated to 800°C and coated on the surface of the damaged parts of the platinum pipe 1, the sand holes, the eroded micropores 2 and the penetration holes 3 through high-temperature spraying equipment to form a fusion layer 4.

[0045] A platinum-rhodium alloy product containing PtO2: 40% and Rh2O3: 60% (such as round thin sheets, long thin sheets, etc. cut according to the shape of the eroded part) is initially heated to 1000°C, and then the platinum product is closely attached to the surface of the fusion layer 4 on the platinum pipe 1 to be repaired, and an electric welding device is used to perform a surfacing treatment on the joint between the product and the pipe to form a structural layer 5.

[0046] The raw materials ZrO2: 50%, Y2O3: 40%, TiO2: 2%, Al2O3: 10%, Na2O: 5% are mixed and ground into nano-scale powder, and then heated to 1200°C and coated on the surface of the structural layer 5 of the welded platinum product through high-temperature spraying equipment to form a protective layer 6.

[0047] The raw material powders of Al2O3: 60%, TiO2: 2%, Fe2O3: 1%, and Na2O: 30% are mixed and ground into nano-scale powders, and then heated to 1000°C, and then a binder is added to make it into slurry. The mixed refractory material is applied to the outer surface of the protective layer 6 by a physical high-temperature brushing method to form a thermal insulation layer 7.

[0048] Example 2

[0049] A method for repairing a platinum channel under high temperature conditions comprises the following steps:

[0050] The raw materials SiO2: 40%, Al2O3: 10%, Na2O: 20%, TiO2: 5%, ZrO2: 2% and SnO2: 2% are mixed in advance and ground into nano-scale powders, and then heated to 1200°C and then coated on the surface of the damaged parts of the platinum pipe 1, the sand holes, the eroded micropores 2 and the penetration holes 3 through high-temperature spraying equipment to form a fusion layer 4.

[0051] A platinum-rhodium alloy product containing PtO2: 45% and Rh2O3: 55% (such as round thin sheets, long thin sheets, etc. cut according to the shape of the eroded part) is initially heated to 900°C, and then the platinum product is closely attached to the surface of the fusion layer 4 on the platinum pipe 1 to be repaired, and an electric welding device is used to perform a surfacing treatment on the joint between the product and the pipe to form a structural layer 5.

[0052] The raw materials ZrO2: 40%, Y2O3: 50%, TiO2: 5%, Al2O3: 5%, Na2O: 10% are mixed and ground into nano-scale powder, and then heated to 800°C and coated on the surface of the structural layer 5 of the welded platinum product through high-temperature spraying equipment to form a protective layer 6.

[0053] The raw material powders of Al2O3: 50%, TiO2: 5%, Fe2O3: 2%, and Na2O: 40% are mixed and ground into nano-scale powders, and then heated to 900°C, and then a binder is added to make it into slurry. The mixed refractory material is applied to the outer surface of the protective layer 6 by a physical high-temperature brushing method to form a thermal insulation layer 7.

[0054] Example 3

[0055] A method for repairing a platinum channel under high temperature conditions comprises the following steps:

[0056] The raw materials SiO2: 42%, Al2O3: 15%, Na2O: 15%, TiO2: 4%, ZrO2: 3% and SnO2: 3% are mixed in advance and ground into nano-scale powders, and then heated to 1000°C and then coated on the surface of the damaged parts of the platinum pipe 1, the sand holes, the eroded micropores 2 and the penetration holes 3 through high-temperature spraying equipment to form a fusion layer 4.

[0057] A platinum-rhodium alloy product containing PtO2: 42% and Rh2O3: 67% (such as round thin sheets, long thin sheets, etc. cut according to the shape of the eroded part) is initially heated to 950°C, and then the platinum product is closely attached to the surface of the fusion layer 4 on the platinum pipe 1 to be repaired, and an electric welding device is used to perform a surfacing treatment on the joint between the product and the pipe to form a structural layer 5.

[0058] The raw materials ZrO2: 45%, Y2O3: 45%, TiO2: 5%, Al2O3: 5%, Na2O: 7% are mixed and ground into nano-scale powder, and then heated to 1100°C and coated on the surface of the structural layer 5 of the welded platinum product through high-temperature spraying equipment to form a protective layer 6.

[0059] The raw material powders of Al2O3: 55%, TiO2: 5%, Fe2O3: 1%, and Na2O: 35% are mixed and ground into nano-scale powders, and then heated to 950°C, and then a binder is added to make it into slurry. The mixed refractory material is applied to the outer surface of the protective layer 6 by a physical high-temperature brushing method to form a thermal insulation layer 7.

[0060] The fusion layer provided in the present invention fuses the surface of the glass liquid leakage area, and the powder particles constituting the fusion layer solidify the leaked liquid glass liquid to a certain extent. At least in a short period of time (within a few hours) under high temperature conditions, the leaking glass should not continue to leak outward in liquid form. The leakage is blocked before the next step of setting the platinum alloy products of the structural layer can be carried out. Similarly, the protective layer solves the problem that the platinum products constituting the structural layer are very easy to oxidize and corrode under high temperature conditions, and only then a layer of protective treatment is carried out in a targeted manner. In order to insulate the repaired area, the last step, that is, the operation of the technical insulation layer, is carried out. Only when the protective layer is implemented, can the protected area be subjected to overall insulation treatment.

[0061] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A method for repairing a platinum channel, characterized in that: The following steps are involved: During the use of the pipeline, a fusion layer (4) for blocking leakage is arranged on the surface of the damaged part of the platinum pipeline (1); a structural layer (5) is arranged on the upper surface of the fusion layer (4), and the structural layer (5) is made of a platinum alloy; a protective layer (6) for preventing oxidation corrosion of the platinum alloy is arranged on the upper surface of the structural layer (5); and a thermal insulation layer (7) for heat preservation is arranged on the upper surface of the protective layer (6); in terms of mass percentage, the raw materials of the fusion layer (4) are composed of SiO2: 40% to 45%, Al2O3: 10% to 20%, Na2O: 10% to 20%, TiO2: 2% to 5%, ZrO2: 2% to 5% and SnO2: 5%.

2. The method for repairing a platinum channel according to claim 1, characterized in that: Measured by mass percentage, the structural layer (5) is a platinum alloy product containing PtO2: 40% to 45% and Rh2O3: 55% to 60%.

3. The method for repairing a platinum channel according to claim 2, characterized in that: The platinum alloy product is in the shape of a round thin sheet or a long thin sheet.

4. The method for repairing a platinum channel according to claim 1, characterized in that: Calculated by mass percentage, the raw materials of the protective layer (6) are composed of ZrO2: 40% to 50%, Y2O3: 40% to 50%, TiO2: 2% to 5%, Al2O3: 5% to 10%, and Na2O: 5% to 10%.

5. The method for repairing a platinum channel according to claim 1, characterized in that: Calculated by mass percentage, the raw materials of the thermal insulation layer (7) are composed of Al2O3: 50% to 60%, TiO2: 2% to 5%, Fe2O3: 1% to 2%, and Na2O: 30% to 40%.

6. The method for repairing a platinum channel according to claim 1, characterized in that: The fusion bonding layer (4) is provided by a spraying method or a pasting method, the structural layer (5) is provided by a pasting method or a welding method, and the protective layer (6) and the thermal insulation layer (7) are provided by any one of the spraying method, the pasting method or the welding method.

7. The method for repairing a platinum channel according to claim 6, characterized in that: The spraying method is to mix and grind the raw materials into nanometer-level powder, and then heat and heat the powder until the temperature reaches 800-1200° C. before applying the powder through a spraying device.

8. The method for repairing a platinum channel according to claim 6, characterized in that: The pasting method is to mix and grind the raw materials into nano-scale powder, then heat and heat it to 900-1000°C, add an adhesive and stir until the mixture is in a slurry state, and then apply the mixture by physical winding and brushing.

9. The method for repairing a platinum channel according to claim 6, characterized in that: The welding method is to heat the raw material to a temperature of 900-1000°C, then place the raw material in close contact with the desired part and use electric welding equipment to perform surfacing treatment on the surface joints.

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