Platinum boat cleaning method

Abstract

The invention discloses a platinum boat cleaning method which comprises the following steps: heating a platinum boat to be cleaned so that the platinum boat is uniformly heated; putting the uniformly heated platinum boat into cold water, showering residual glass in the platinum boat with the cold water, and stripping the residual glass in the platinum boat; carrying out acid soaking treatment on the platinum boat by using an acid solution, and eroding and cleaning residual glass in a joint corner of the platinum boat; and cleaning the platinum boat with deionized water, and recovering the acid solution. A glass cold quenching and acid soaking composite method is used for cleaning the platinum boat, and the method is safe, simple, convenient, rapid and efficient. The repeated acid soaking is reduced, the acid liquor consumption is reduced, the cost and the environmental pollution risk are reduced, the operation risk is reduced, the safety is improved, and the platinum boat cleaning time is shortened.

Description

Technical Field

[0001] The present invention belongs to the technical field of flat glass testing and relates to a method for cleaning a platinum boat. Background Art

[0002] Glass is in a metastable state, and its internal energy is higher than that of crystals with the same composition. During the cooling process of the melt, the internal energy of the glass tends to transform into a lower crystal state. Therefore, crystallization occurs. The occurrence of crystallization will lead to glass defects and seriously affect various application performances of the glass. Therefore, by testing the crystallization performance, the liquidus temperature range of the glass can be understood to further optimize the batch formula and the process. It is of great significance for new product development, product production, and quality management.

[0003] Currently, the process of the glass crystallization performance test is to process the sample to be tested into glass particles with uniform particle size, load them into a platinum boat, and place the boat in a furnace with a temperature gradient; keep it warm for a sufficient time to reach thermal equilibrium between the glass phase and the crystal phase, and then take out the platinum boat; after the boat body cools down, take out the sample bar, and use a polarized light microscope to judge the degree and position of crystallization on the contact surface between the sample bar and the platinum boat to determine the upper and lower limit temperatures of crystallization.

[0004] During the test, the cleanliness of the boat body has a great influence on the crystallization result. Residual glass samples or other impurities at the joint of the boat body will cause the precipitation of foreign crystals during the heat preservation of the sample, affecting the judgment of the crystallization state of the sample bar itself and resulting in deviation of the crystallization temperature. In order to avoid the influence of impurities on the test result, the platinum boat, the carrier of the sample bar, needs to be thoroughly cleaned after each test or before the next test. For the cleaning of the glass inside platinum products, the existing technical means mostly use hydrofluoric acid, hydrochloric acid, and nitric acid for boiling acid pickling; the treatment time is long, or multiple acid picklings are required repeatedly, resulting in an increase in acid consumption. This not only increases the cost but also increases the risk of environmental pollution. Secondly, the acids used are all strongly corrosive acids. During the acid pickling process, if the operation is improper, it is very easy to cause harm to the human body, and there are certain safety hazards. Another treatment method is to add fluxes such as potassium pyrosulfate, boric acid, and sodium carbonate to melt the internal residual glass for the second time and cast it out. It is difficult to control the dosage of the flux, and it cannot ensure that there is no glass residue after the second melting. For continuous test operations, it is time-consuming and laborious and affects the efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for cleaning a platinum boat to solve the problems of environmental pollution and low efficiency existing in the prior art.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A method for cleaning a platinum boat includes: Heating the platinum boat to be cleaned to make it evenly heated; Put the uniformly heated platinum boat into cold water, rinse the residual glass inside the platinum boat with cold water, and peel off the residual glass inside the platinum boat; Treat the platinum boat with acid solution by acid soaking to erode and clean the glass remaining in the corners of the seams of the platinum boat; Wash the platinum boat with deionized water and recover the acid solution.

[0007] Furthermore, the temperature of the uniform heating is 900 - 1200 °C, and the heating time is 3 - 5 minutes.

[0008] Furthermore, the heating furnace is a gradient temperature furnace, a high-temperature furnace or an annealing furnace.

[0009] Furthermore, the heating process is carried out using the residual temperature during the furnace cooling process.

[0010] Furthermore, the time for rinsing with cold water is 1 - 5 minutes.

[0011] Furthermore, the acid solution is an HF solution, and the mass fraction of HF is 40%.

[0012] Furthermore, the time for acid soaking treatment is 1 - 6 hours.

[0013] Furthermore, the deionized water cleaning process uses an ultrasonic cleaning device.

[0014] Furthermore, the recovery of the acid solution adopts the distillation method or the ion exchange method.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a method for cleaning a platinum boat. By heating the platinum boat to be cleaned, putting the uniformly heated platinum boat into cold water for cold quenching treatment to peel off the residual glass inside the platinum boat; then treating the platinum boat with acid solution by acid soaking to erode and clean the glass remaining in the corners of the seams of the platinum boat, and finally washing the platinum boat with deionized water and recovering the acid solution. After the crystallization performance test of flat glass, the present invention uses the composite method of glass cold quenching and acid soaking for cleaning the platinum boat. While stabilizing the long strip state of the platinum boat, it is safe, simple, fast and efficient. If there is less residual glass, it is not necessary to use acid soaking again, and the platinum boat can be cleaned by cold quenching treatment. Even if there is still glass remaining after cold quenching treatment, it is only a small amount of glass, and it can be completely cleaned by acid soaking for a short time. The present invention reduces repeated acid soaking, reduces the consumption of acid solution, reduces the cost and the risk of environmental pollution, reduces the operation risk, improves the safety, and more importantly, shortens the cleaning time of the platinum boat.

[0016] Furthermore, during the heating process of the present invention, the residual heat during the furnace cooling process is utilized for heat treatment. The temperature is not high and it does not require a long time. This not only rationally utilizes the heat source and improves the energy utilization efficiency, but also can clean most of the residual glass in the platinum boat.

[0017] Furthermore, the present invention removes impurities and pollutants in the acid solution through distillation or ion exchange methods, enabling the recycled acid solution to meet the standards for reuse, realizing the recycling of resources and reducing environmental pollution. Detailed implementation manners

[0018] To enable those skilled in the art to understand the features and effects of the present invention, the following provides a general description and definition of the terms and phrases mentioned in the specification and claims. Unless otherwise specified, all technical and scientific terms used herein shall have the ordinary meaning understood by those skilled in the art regarding the present invention. In case of conflict, the definitions in this specification shall prevail.

[0019] The theories or mechanisms described and disclosed herein, whether correct or incorrect, shall not limit the scope of the present invention in any way, that is, the content of the present invention can be implemented without being limited by any specific theory or mechanism.

[0020] In this article, all features defined in the form of numerical ranges or percentage ranges, such as numerical values, quantities, contents, and concentrations, are only for the sake of simplicity and convenience. Accordingly, the description of numerical ranges or percentage ranges should be regarded as having covered and specifically disclosed all possible sub-ranges and individual numerical values within the range (including integers and fractions).

[0021] In this article, unless otherwise specified, "comprising", "including", "containing", "having" or similar terms cover the meanings of "consisting of" and "consisting essentially of". For example, "A comprises a" covers the meanings of "A comprises a and others" and "A only comprises a".

[0022] In this article, for the sake of concise description, all possible combinations of all technical features in each embodiment or example are not described. Therefore, as long as there is no contradiction in the combination of these technical features, the technical features in each embodiment or example can be combined arbitrarily, and all possible combinations should be considered as the scope described in this specification.

[0023] The following further elaborates the present invention in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.

[0024] Conventional instruments and equipment in the art are used in the following embodiments. For the experimental methods without specific conditions noted in the following embodiments, they are generally carried out under conventional conditions or according to the conditions recommended by the manufacturer. Various raw materials are used in the following embodiments. Unless otherwise specified, commercially available products are used, and their specifications are conventional specifications in the art. In the specification of the present invention and the following embodiments, unless otherwise specified, "%" represents weight percentage, "parts" represents weight parts, and the ratio represents weight ratio.

[0025] The present invention will be further described in detail below: The present invention provides a method for cleaning a platinum boat, specifically including the following steps: S1: Place the platinum boat to be cleaned in a furnace and heat it to make it evenly heated.

[0026] S2: Glass cold quenching treatment. Take out the evenly heated platinum boat and immediately put it into cold water, and rinse the inside and outside of the platinum boat with cold water for 1 - 5 minutes to subject the residual glass inside the platinum boat to the impact of hot and cold environments.

[0027] S3: After cold quenching treatment, most of the residual glass in the platinum boat is easily peeled off; then put the platinum boat into an acid solution for acid soaking treatment to erode and clean the small amount of glass remaining in the corners of the platinum boat joints.

[0028] S4: Use an ultrasonic cleaning device to clean the platinum boat with deionized water, and recover the acid solution by distillation or ion exchange method.

[0029] Further, the temperature for the platinum boat to be evenly heated in the furnace is 900 - 1200 °C, and the heating time is 3 - 5 minutes. The heating furnace is a temperature-gradient furnace, a high-temperature furnace or an annealing furnace, and it can also be carried out using the remaining temperature during the furnace cooling process after the crystallization sample bar is taken out of the furnace.

[0030] Further, the acid solution is an HF solution, the mass fraction of HF is 40%, and the HF acid soaking treatment time is 1 - 6 hours. HF can effectively dissolve glass and improve the cleaning effect. Since heat treatment and cold quenching treatment have been carried out, most of the glass has been peeled off. Therefore, the amount of HF used and the number of acid soaking times can be reduced, the cost and the risk of environmental pollution can be reduced, and at the same time, the operation risk can be reduced and the safety can be improved.

[0031] Example 1: This example provides a method for cleaning a platinum boat, and the specific steps are as follows: Step 1: Prepare the platinum boat to be processed. The size of the platinum boat is 32 cm in length, 1.5 cm in width, and 1.2 cm in height.

[0032] Step 2: Place the platinum boat to be processed in a temperature-gradient furnace for heating. The temperature of the temperature-gradient furnace is set at 1100 °C, and the heating time is 3 min. Inside the temperature-gradient furnace, the platinum boat will undergo sufficient heat treatment to soften the residual glass material inside.

[0033] Step 3: Take out the heated platinum boat and put it into cold water for cold quenching treatment for 3 min. Short-time cold quenching can accelerate the glass cracking and being washed out without damaging the platinum boat body, effectively improving the cleaning efficiency.

[0034] Step 4: After the cold quenching treatment, perform acid soaking treatment with HF. The concentration of HF is 40%, and the acid soaking time is 2 h. HF can effectively dissolve the glass and improve the cleaning effect. Since heat treatment and cold quenching treatment have been carried out, the amount of HF used and the number of acid soaking times can be reduced, reducing costs and the risk of environmental pollution. At the same time, the operation risk is reduced and safety is improved. In addition, during the treatment process, make full use of the remaining temperature of the temperature-gradient furnace body for heat treatment, rationally utilize the heat source, avoid wasting energy, and improve energy utilization efficiency.

[0035] Step 5: Use an ultrasonic cleaning device to clean the platinum boat with deionized water, and recover the acid solution by distillation.

[0036] Through the above steps, this embodiment can effectively improve the treatment efficiency of the residual glass in the platinum boat, reduce the workload, lower costs, protect the environment, and improve safety.

[0037] Example 2: This embodiment provides a method for cleaning a platinum boat, and the specific steps are as follows: Step 1: Prepare the platinum boat to be processed. The size of the platinum boat is 32 cm in length, 1.5 cm in width, and 1.2 cm in height.

[0038] Step 2: Place the platinum boat to be processed in a temperature-gradient furnace for heating. The temperature of the temperature-gradient furnace is set at 900 °C, and the heating time is 5 min. Inside the temperature-gradient furnace, the platinum boat will undergo sufficient heat treatment to soften the residual glass material inside.

[0039] Step 3: Take out the heated platinum boat and put it into cold water for cold quenching treatment for 3 min to peel off the residual glass inside the platinum boat. Short-time cold quenching can accelerate the glass cracking and being washed out without damaging the platinum boat body, effectively improving the cleaning efficiency.

[0040] Step 4: After the cold quenching treatment, perform acid soaking treatment with HF. The concentration of HF is 40%, and the acid soaking time is 4 h to erode and clean the glass remaining in the corners of the platinum boat joints.

[0041] Step 5: Use an ultrasonic cleaning device to clean the platinum boat with deionized water, and recover the acid solution by ion exchange method.

[0042] Example 3: This example provides a method for cleaning a platinum boat, and the specific steps are as follows: Step 1: Prepare the platinum boat to be processed. The size of the platinum boat is 32 cm in length, 1.5 cm in width, and 1.2 cm in height.

[0043] Step 2: Place the platinum boat to be processed in a high-temperature furnace for heating. The temperature of the high-temperature furnace is set at 1200 °C, and the heating time is 3 min. Inside the high-temperature furnace, the platinum boat will undergo sufficient heat treatment to soften the residual glass material inside.

[0044] Step 3: Take out the heated platinum boat and put it into cold water for cold quenching treatment for 2 min to peel off the residual glass inside the platinum boat.

[0045] Step 4: After the cold quenching treatment, perform acid soaking treatment with HF. The concentration of HF is 40%, and the acid soaking time is 1 h to erode and clean the glass remaining in the corners of the platinum boat joints.

[0046] Step 5: Use an ultrasonic cleaning device to clean the platinum boat with deionized water and recover the acid solution by distillation.

[0047] Example 4: This example provides a method for cleaning a platinum boat, and the specific steps are as follows: Step 1: Prepare the platinum boat to be processed. The size of the platinum boat is 32 cm in length, 1.5 cm in width, and 1.2 cm in height.

[0048] Step 2: Place the platinum boat to be processed in an annealing furnace for heating. The temperature of the annealing furnace is set at 1000 °C, and the heating time is 5 min. Inside the annealing furnace, the platinum boat will undergo sufficient heat treatment to soften the residual glass material inside.

[0049] Step 3: Take out the heated platinum boat and put it into cold water for cold quenching treatment for 5 min to peel off the residual glass inside the platinum boat.

[0050] Step 4: After the cold quenching treatment, perform acid soaking treatment with HF. The concentration of HF is 40%, and the acid soaking time is 3 h to erode and clean the glass remaining in the corners of the platinum boat joints.

[0051] Step 5: Use an ultrasonic cleaning device to clean the platinum boat with deionized water and recover the acid solution by distillation.

[0052] Example 5: This example provides a method for cleaning a platinum boat, and the specific steps are as follows: Step 1: Prepare the platinum boat to be processed. The size of the platinum boat is 32 cm in length, 1.5 cm in width, and 1.2 cm in height.

[0053] Step 2: Place the platinum boat to be processed in an annealing furnace for heating. The temperature of the annealing furnace is set at 900 °C, and the heating time is 4 min. Inside the annealing furnace, the platinum boat will undergo sufficient heat treatment to soften the internal residual glass material.

[0054] Step 3: Take out the heated platinum boat and immerse it in cold water for 1 min for cold quenching treatment to peel off the internal residual glass of the platinum boat.

[0055] Step 4: After the cold quenching treatment, perform acid pickling treatment with HF. The concentration of HF is 40%, and the acid pickling time is 6 h to erode and clean the glass remaining in the corners of the platinum boat joints.

[0056] Step 5: Clean the platinum boat with deionized water using an ultrasonic cleaning device and recover the acid solution by ion exchange method.

[0057] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for cleaning a platinum boat, characterized in that: include: Heat the platinum boat to be cleaned so that it is heated evenly; Put the evenly heated platinum boat into cold water, rinse the remaining glass inside the platinum boat with cold water, and peel off the remaining glass inside the platinum boat; Use acid solution to soak the platinum boat and corrode and clean the glass remaining in the corners of the platinum boat joints; The platinum boat was rinsed with deionized water and the acid solution was recovered.

2. A method for cleaning a platinum boat according to claim 1, characterized in that: The uniform heating temperature is 900-1200° C., and the heating time is 3-5 minutes.

3. A platinum boat cleaning method according to claim 1, characterized in that: The heating furnace is a gradient temperature furnace, a high temperature furnace or an annealing furnace.

4. A platinum boat cleaning method according to claim 1, characterized in that: The heating process is carried out using the residual temperature of the furnace cooling process.

5. A platinum boat cleaning method according to claim 1, characterized in that: The cold water shower time is 1 to 5 minutes.

6. A platinum boat cleaning method according to claim 1, characterized in that: The acid solution is an HF solution, and the mass fraction of HF is 40%.

7. A platinum boat cleaning method according to claim 1, characterized in that: The acid soaking treatment time is 1 to 6 hours.

8. A platinum boat cleaning method according to claim 1, characterized in that: The deionized water cleaning process uses an ultrasonic cleaning device.

9. A platinum boat cleaning method according to claim 1, characterized in that: The acid solution is recovered by distillation or ion exchange.