Method for enhancing conical surface grinding sealing performance

Abstract

The invention provides a method for enhancing conical surface grinding sealing performance, and relates to the technical field of metallurgy, and the method comprises the following steps: carrying out decontamination treatment and rough cleaning operation on a conical graphite sleeve and a conical sealing box; a semicircular file is used for treating burrs on the surfaces of the conical graphite sleeve and the conical sealing box, and the treated conical graphite sleeve and conical sealing box are subjected to rough cleaning operation; the conical sealing box is placed on a horizontal operation table; matching the lower conical surface of the conical graphite sleeve with the upper conical surface of the conical sealing box, and rotating the conical graphite sleeve left and right in the horizontal direction; acquiring the contact condition of the upper conical surface of the conical sealing box, namely the condition of convex points; the highest protruding point is scraped; removing burrs generated after scraping by using carborundum; the scraping standard is met; and carrying out a pressurization test until the test standard value is met. The service life of the steel conical sealing box of the molten drop furnace can be prolonged, the scientific research test progress is accelerated, scientific research test consumables are saved, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgy, and in particular to a method for enhancing the sealing performance of cone surface grinding. Background Art

[0002] The dripping furnace is a metallurgical performance testing device that heats the reactor to a predetermined constant temperature and introduces a certain amount of reducing gas and protective gas. Under the action of high temperature and reducing atmosphere, the crucible test sample in the furnace reacts and the dripping material drips into the quantitative crucible. After the experiment, the computer system collects and analyzes the basic characteristics of the experimental sample such as softening range, dripping range, and pressure difference of the material column, and obtains the corresponding experimental data and curves. It is an important scientific research experimental equipment for simulating blast furnace smelting process.

[0003] The drip furnace is composed of the furnace body, the pressing device, the gas sealing device, the gas distribution cabinet and other components. The gas sealing device is composed of the lower cone surface of the conical graphite sleeve and the upper cone surface of the steel conical sealing box. Whether the airtightness of the gas sealing device meets the use standard will directly affect the size and accuracy of the pressure difference value of the material column after the test. Since the test work carried out by the drip furnace is often operated at high temperature, after a period of use, it is found that the pressure difference value of the material column in the experimental results is inaccurate (the error of the experimental results of the same sample is large). Through observation and analysis, it is found that the reasons for the poor sealing of the gas sealing device of the drip furnace are as follows:

[0004] 1. The tests conducted by the drip furnace are often operated at high temperatures, causing deformation of the conical graphite sleeve and the steel conical sealing box (the taper size exceeds the tolerance value, and the gap between the combined cone surfaces is too large), which reduces the sealing performance of the combined sealing surfaces and causes air leakage;

[0005] 2. There is a certain error in the size of the lower cone surface of the conical graphite sleeve and the upper cone surface of the steel conical sealing box after processing. The taper and surface roughness cannot be guaranteed, which is another factor affecting the airtightness.

[0006] In order to solve the existing problems and not affect the progress of scientific research experiments, the steel conical sealing box is usually dismantled and the conical surface is repaired by machining to obtain the corresponding size and sealing. Although the machining repair method can ensure airtightness, this method also has the following problems:

[0007] 1. The processing time is long, which affects the progress of the test;

[0008] 2. Frequent use of machining to repair conical surfaces will cause the overall thickness of the conical steel plate to decrease, and the deformation cycle of the shape during the test will increase, which will directly affect the service life of the steel conical sealing box. Summary of the invention

[0009] According to the above technical problem that the air sealing device of the dripping furnace fails due to shape deformation after being used for a period of time, a method for enhancing the sealing performance of conical surface grinding is provided.

[0010] The technical means adopted by the present invention are as follows:

[0011] A method for enhancing the sealing performance of cone surface grinding comprises the following steps:

[0012] Step 1: Decontamination and rough cleaning of the conical graphite sleeve and conical sealing box;

[0013] Step 2: using a semicircular file to process the surface burrs of the tapered graphite sleeve and the tapered sealing box, and then performing a rough cleaning operation on the tapered graphite sleeve and the tapered sealing box after the processing;

[0014] Step 3: placing the conical sealing box processed in step 2 on a horizontal operating table; matching the lower conical surface of the conical graphite sleeve processed in step 2 with the upper conical surface of the conical sealing box processed in step 2, and rotating the conical graphite sleeve horizontally left and right;

[0015] Step 4: lift the lower conical surface of the conical graphite sleeve and place it on a horizontal operating table; obtain the contact condition of the upper conical surface of the conical sealing box, that is, the condition of the convex point;

[0016] Step 5: Scrape the highest raised point;

[0017] Step 6: Use diamond abrasive to remove burrs produced after scraping;

[0018] Step 7: Repeat steps 1 to 6 until the scraping standard is met;

[0019] Step 8: Reinstall the conical graphite sleeve and conical sealing box that meet the scraping standard into the furnace body, and conduct a pressure test to detect whether the maximum pressure difference value meets the test standard value; if it does not meet the test standard value, perform step 9; if it meets the test standard value, use the conical graphite sleeve and conical sealing box to conduct experiments;

[0020] Step 9: Repeat steps 7 to 8 until the test standard value is met.

[0021] Furthermore, the decontamination treatment is to use an oil cleaning agent to clean each surface of the conical graphite sleeve and the steel conical sealing box.

[0022] Furthermore, the rough cleaning operation is to wipe it with clean cotton yarn and blow away the particles on the surface with a hair dryer.

[0023] Furthermore, in step 3, the horizontal direction is rotated 360 degrees to the left and right.

[0024] Furthermore, in step 6, the diamond sand is 600 mesh.

[0025] Furthermore, the pressure test is to place a graphite crucible without holes at the bottom into a conical graphite sleeve, install a graphite pressure rod into the graphite crucible, cover the furnace top sealing cover, lower the pressurizer to the graphite pressure rod, pressurize, and introduce standard nitrogen.

[0026] Furthermore, the scraping standard is that the contact surface between the conical graphite sleeve and the conical sealing box reaches more than 70% and the contact point has 6 to 8 raised points within an area of ​​25 mm×25 mm.

[0027] Furthermore, the test standard value is 20-30Mpa.

[0028] Furthermore, the conical sealing box is made of steel.

[0029] Furthermore, the maximum pressure difference value is the difference between the pressure generated by introducing a certain amount of reducing gas when the sample is heated to 900 degrees and the pressure generated when the sample undergoes a physical reaction at high temperature and the furnace is shut down.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] The present invention can extend the service life of the steel conical sealing box of the dripping furnace, accelerate the progress of scientific research experiments, save scientific research and experimental consumables, and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1 It is a schematic diagram of the overall process of the present invention. DETAILED DESCRIPTION

[0034] 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.

[0035] 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.

[0036] like Figure 1 As shown, the present invention provides a method for enhancing the sealing performance of cone surface grinding, comprising the following steps:

[0037] Step 1: Decontamination and rough cleaning of the conical graphite sleeve and the conical sealing box; in this application, decontamination is to use an oil cleaning agent to clean the surfaces of the conical graphite sleeve and the steel conical sealing box. Rough cleaning is to wipe with clean cotton yarn and blow away the particles on the surface with a hair dryer.

[0038] Step 2: Use a semicircular file to process the surface burrs of the tapered graphite sleeve and the tapered sealing box, and then perform a rough cleaning operation on the treated tapered graphite sleeve and the tapered sealing box; the rough cleaning operation is to wipe it with clean cotton yarn and blow away the particles on the surface with a hair dryer.

[0039] Step 3: Place the conical sealing box processed in step 2 on a horizontal operating table; match the lower conical surface of the conical graphite sleeve processed in step 2 with the upper conical surface of the conical sealing box processed in step 2, and rotate the conical graphite sleeve horizontally left and right (360 degrees in each direction);

[0040] Step 4: lift the lower conical surface of the conical graphite sleeve and place it on a horizontal operating table; obtain the contact condition of the upper conical surface of the conical sealing box, that is, the condition of the convex point;

[0041] Step 5: Scrape the highest raised point;

[0042] Step 6: Use 600-grit emery to remove burrs produced after scraping;

[0043] Step 7: Repeat steps 1 to 6 until the scraping standard is met; the scraping standard is that the contact surface between the tapered graphite sleeve and the tapered sealing box reaches more than 70% and the contact point has 6 to 8 raised points within an area of ​​25mm×25mm.

[0044] Step 8: Reinstall the conical graphite sleeve and conical sealing box that meet the scraping standard into the furnace body, conduct a pressure test, and detect whether the maximum pressure difference value meets the test standard value; if it does not meet the test standard value (the test standard value is 20-30Mpa). , proceed to step 9; if it meets the test standard value, use the conical graphite sleeve and conical sealing box for the experiment. The pressure test is to put the graphite crucible with no holes at the bottom into the conical graphite sleeve, install the graphite pressure rod into the graphite crucible, cover the furnace top sealing cover, lower the pressurizer to the graphite pressure rod, pressurize, and pass standard nitrogen.

[0045] Step 9: Repeat steps 7 to 8 until the test standard value is met.

[0046] In this application, the conical sealing box is made of steel.

[0047] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0048] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0049] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0050] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0051] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0052] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for enhancing the sealing performance of cone surface grinding, characterized in that: The following steps are involved: Step 1: Decontamination and rough cleaning of the conical graphite sleeve and conical sealing box; Step 2: using a semicircular file to process the surface burrs of the tapered graphite sleeve and the tapered sealing box, and then performing a rough cleaning operation on the tapered graphite sleeve and the tapered sealing box after the processing; Step 3: placing the conical sealing box processed in step 2 on a horizontal operating table; matching the lower conical surface of the conical graphite sleeve processed in step 2 with the upper conical surface of the conical sealing box processed in step 2, and rotating the conical graphite sleeve horizontally left and right; Step 4: lift the lower conical surface of the conical graphite sleeve and place it on a horizontal operating table; obtain the contact condition of the upper conical surface of the conical sealing box, that is, the condition of the convex point; Step 5: Scrape the highest raised point; Step 6: Use diamond abrasive to remove burrs produced after scraping; Step 7: Repeat steps 1 to 6 until the scraping standard is met; Step 8: Reinstall the conical graphite sleeve and conical sealing box that meet the scraping standard into the furnace body, and conduct a pressure test to detect whether the maximum pressure difference value meets the test standard value; if it does not meet the test standard value, perform step 9; if it meets the test standard value, use the conical graphite sleeve and conical sealing box to conduct experiments; Step 9: Repeat steps 7 to 8 until the test standard value is met.

2. A method for enhancing the sealing performance of cone surface grinding according to claim 1, characterized in that: The decontamination treatment is to use an oil cleaning agent to clean each surface of the conical graphite sleeve and the steel conical sealing box.

3. A method for enhancing the sealing performance of cone surface grinding according to claim 1, characterized in that: The rough cleaning operation is to wipe it with clean cotton yarn and blow away the particles on the surface with a hair dryer.

4. A method for enhancing the sealing performance of cone surface grinding according to claim 1, characterized in that: In step 3, the horizontal direction is rotated 360 degrees to the left and right.

5. A method for enhancing the sealing performance of cone surface grinding according to claim 1, characterized in that: In step 6, the diamond sand is 600 mesh.

6. A method for enhancing the sealing performance of cone surface grinding according to claim 1, characterized in that: The pressure test is to put a graphite crucible without holes at the bottom into a conical graphite sleeve, install a graphite pressure rod into the graphite crucible, cover the furnace top sealing cover, lower the pressurizer to the graphite pressure rod, pressurize, and introduce standard nitrogen.

7. A method for enhancing the sealing performance of cone surface grinding according to claim 1, characterized in that: The scraping standard is that the contact surface between the conical graphite sleeve and the conical sealing box reaches more than 70% and the contact point has 6 to 8 raised points within an area of ​​25 mm×25 mm.

8. The method for enhancing the sealing performance of cone surface grinding according to claim 1, characterized in that: The test standard value is 20-30Mpa.

9. A method for enhancing the sealing performance of cone surface grinding according to claim 1, characterized in that: The conical sealing box is made of steel.

10. A method for enhancing the sealing performance of cone surface grinding according to claim 1, characterized in that: The maximum pressure difference is the difference between the pressure generated by introducing a certain amount of reducing gas when the sample is heated to 900 degrees and the pressure generated when the sample undergoes a physical reaction at high temperature and the furnace is shut down.

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