CN220399057U - Sample preparation device for metallurgical slag sample of laser heat conduction instrument - Google Patents
Sample preparation device for metallurgical slag sample of laser heat conduction instrument Download PDFInfo
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- CN220399057U CN220399057U CN202320385518.6U CN202320385518U CN220399057U CN 220399057 U CN220399057 U CN 220399057U CN 202320385518 U CN202320385518 U CN 202320385518U CN 220399057 U CN220399057 U CN 220399057U
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- 239000002893 slag Substances 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 claims description 16
- 239000007770 graphite material Substances 0.000 claims description 7
- 238000012360 testing method Methods 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910002804 graphite Inorganic materials 0.000 abstract description 2
- 239000010439 graphite Substances 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract 2
- 230000008569 process Effects 0.000 description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 10
- 229910052802 copper Inorganic materials 0.000 description 10
- 239000010949 copper Substances 0.000 description 10
- 230000006872 improvement Effects 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 239000002918 waste heat Substances 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
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- 229910052786 argon Inorganic materials 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005464 sample preparation method Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
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- 238000000748 compression moulding Methods 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses a sample preparation device of a metallurgical slag sample of a laser heat conduction instrument, and aims to provide a sample preparation device which meets the test requirement of the metallurgical slag sample of the laser heat conduction instrument, solve the problem of difficult sample preparation, effectively improve the sample preparation precision and reduce the error of a detection result. The device is made of high-purity graphite and has good heat conduction and high temperature resistance. The device comprises a base, a top cover, a bracket, a sample forming groove, an overflow channel, a clamping groove, a traction ring, a guide inclined plane and a connecting shaft. The utility model has the characteristics of convenient and fast sample preparation, high efficiency and low cost, and the prepared sample is regular and uniform and has good detection effect.
Description
Technical Field
The utility model belongs to the technical field of metallurgy, and particularly relates to a sample preparation device for a metallurgical slag sample of a laser heat conduction instrument.
Background
The metallurgical slag is solid waste discharged in a high-temperature molten state in the pyrometallurgy process, and mainly comprises steel slag, copper slag, lead slag, tin slag and the like. Taking copper slag as an example, it is common that about 2.2 to 5 tons of smelting copper slag are produced per 1 ton of copper produced. 1048.70 ten thousand tons of refined copper are produced in China in 2021, and the copper is increased by 4.61% in year 2020. The tapping temperature of the copper slag is 1150-1300 ℃, the specific heat capacity is 1.254 kJ/(kg.K), the heat of fusion is 420kJ/kg, the thermodynamic energy of the copper slag can reach 1.86-1.99 GJ/t, and the copper slag has considerable waste heat recovery value. At present, the main metallurgical slag waste heat recovery technology comprises a dry granulation fluidized bed or a moving bed waste heat recovery technology and the like, and thermodynamic parameters such as thermal diffusivity, heat conductivity, specific heat capacity and the like of the metallurgical slag are indispensable for theoretical analysis, process calculation, engineering design and the like of a waste heat recovery process, and have very important significance for strengthening a heat transfer process and improving waste heat recovery efficiency so as to realize carbon peak in the metallurgical industry and carbon neutralization targets.
The laser flash method is a method widely applied in the field of heat conduction testing, and is used for accurately measuring the thermal diffusivity of a material and calculating the heat conductivity. The laser flash method has the characteristics of rapidness, non-destructiveness and non-contact. The principle is that the lower surface of the sample is heated by laser pulse, the temperature change of the upper surface of the sample is measured by an infrared detector, so that the thermal diffusivity is obtained, and the thermal conductivity of the material can be obtained by combining the density value and the specific heat capacity of the sample, wherein the calculation formula is lambda (T) =alpha (T) ·c p (T). Rho (T), wherein λ represents the thermal conductivity, α represents the thermal diffusivity, c p Represents specific heat capacity, ρ represents density, and T represents temperature. The laser heat conduction instrument has the outstanding advantages of high precision, high repeatability, quick measurement, abundant sample support types and the like, the measurement temperature range is-125-2800 ℃, and the sample application range is extremely wide, and the laser heat conduction instrument comprises ceramics, glass, metal, melt, powder, liquid, fiber and the like, so the laser heat conduction instrument is widely applied in the field of heat conduction test.
The laser heat conduction instrument is used for testing, so that a sample meeting the size requirement of the sample support is required to be prepared, and at present, the laser heat conduction instrument is provided with a round sample support and a square sample support with the diameter or side length of 6-25.4 mm, and the thickness of the sample is 0.01-6 mm. For metallurgical slag materials, samples with a thickness of 1-2 mm are usually prepared to obtain better test results. The metallurgical slag is in an irregular block shape or a broken particle shape at room temperature, has higher hardness, has Mohs hardness of 6-7 degrees, has brittle texture, is relatively easy to process and mold compared with materials such as metal and the like, and is unsuitable for cold processing such as cutting, grinding and the like because the copper slag has high hardness, is fragile and has thinner samples. In addition, slag viscosity is high, surface tension is large, contact angle is large, the slag is aggregated into a drop shape in a die, and the slag is difficult to spread, even if casting and pressing are adopted, because the thickness of a sample is thin, the temperature difference between the sample and the die is large, cold cracking is extremely easy to occur during cooling, and the yield of the sample is low. At present, a sample preparation device and a sample preparation method of a metallurgical slag sample of a laser heat conduction instrument are not reported yet.
Disclosure of Invention
Aiming at the problems that metallurgical slag is high in hardness at room temperature, brittle in texture, not suitable for cold processing such as cutting and grinding, high in high-temperature casting viscosity, large in contact angle, poor in spreadability, easy to generate cold cracking during cooling and the like, the utility model provides a sample preparation device of a metallurgical slag sample of a laser heat conduction instrument.
In order to achieve the above object, the present utility model is realized by:
a sample preparation device of a metallurgical slag sample of a laser heat conduction instrument comprises a base, a top cover and a bracket; the base is provided with a shaft hole I; the top cover is provided with a shaft hole II and a shaft hole III; the bracket is provided with a shaft hole IV; the base is connected with the top cover through a main shaft; the top cover is connected with the bracket through a countershaft; the top cover rotates freely around the main shaft, and the bracket rotates freely around the auxiliary shaft; the base is provided with a sample forming groove; overflow channels are formed around the sample forming groove; the middle front end of the base is provided with a clamping groove matched with the bracket and a guide inclined plane for controlling the bracket to rotate; the front end of the base is provided with a traction ring.
As a further technical improvement, the cross section of the sample forming groove is round or square, the diameter or side length of the sample forming groove is 6-25.4 mm, and the groove depth is 1-2 mm.
As a further technical improvement, the width of the overflow channel is 3mm, and the depth is 3mm.
As a further technical improvement, the included angle between the guide inclined plane and the horizontal plane is 30 degrees.
As a further technical improvement, the cross section of one end of the bracket is semicircular with the radius of 3mm.
As a further technical improvement, the cross-sectional shape of the clamping groove is a combination of a part of a semicircle with a radius of 3mm and a tangent line of the semicircle, and the clamping groove is matched with the end face of the bracket.
As a further technical improvement, one end of the main shaft is in interference fit with the shaft hole I on one side of the base, and one end of the auxiliary shaft is in interference fit with the shaft hole III on one side of the top cover.
As a further technical improvement, the base, the top cover, the bracket, the main shaft and the auxiliary shaft are all made of high-purity graphite materials; the grade of the high-purity graphite material is grade 4.
The utility model has the advantages and beneficial effects that:
the utility model provides a sample preparation device for metallurgical slag samples of a laser heat conduction instrument, which comprises a base, a top cover and a bracket, wherein two sample forming grooves are formed in the base, two identical samples can be produced at a time, the sample preparation efficiency is high, overflow channels are formed around the sample forming grooves, and excessive slag overflow can be effectively prevented from polluting a hearth. The clamping groove matched with the bracket and the guide inclined plane for controlling the bracket to rotate are formed at the front end in the base, and the automatic closing of the top cover and the compression molding of the sample can be realized through one-step simple operation. The device has simple integral structure, is made of high-purity graphite materials, is easy to process, has lower cost and can be repeatedly used. The sample preparation device enables metallurgical slag particles to be molded in a high-temperature molten state, and solves the problems that the metallurgical slag particles are fragile in cold state cutting and polishing, high in slag viscosity in casting, large in surface tension, difficult to spread in a die and cold cracking in cooling. The prepared sample has regular appearance and higher precision, and can obtain accurate test results.
Drawings
FIG. 1 is an exploded view of a sample preparation apparatus for a metallurgical slag sample of a laser thermal conductivity meter.
FIG. 2 is a schematic illustration of a process for producing metallurgical slag samples using the present utility model.
FIG. 3 is a second schematic illustration of a process for producing a metallurgical slag sample using the present utility model.
FIG. 4 is a schematic diagram of a process for producing a metallurgical slag sample using the present utility model.
FIG. 5 is a schematic diagram of a process for producing a metallurgical slag sample using the present utility model.
FIG. 6 is a schematic diagram of a process for making a metallurgical slag sample using the present utility model.
FIG. 7 is a schematic diagram of a cartridge structure of the sample preparation device.
FIG. 8 is a graph of thermal conductivity, thermal diffusivity, specific heat capacity measured using a laser thermal conductivity meter for a slag sample prepared according to the present utility model.
The device comprises a 1-base, a 2-top cover, a 3-support, a 4-sample forming groove, a 5-overflow channel, a 6-clamping groove, a 7-guiding inclined plane, an 8-traction ring, a 9-shaft hole I, a 10-shaft hole II, a 11-shaft hole III, a 12-shaft hole IV, a 13-main shaft and a 14-auxiliary shaft.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
Examples:
as shown in FIG. 1, the sample preparation device of the metallurgical slag sample of the laser heat conduction instrument comprises a base 1, a top cover 2 and a bracket 3; the base 1 is provided with a shaft hole I9; the top cover 2 is provided with a shaft hole II10 and a shaft hole III 11; the bracket 3 is provided with a shaft hole IV 12; the base 1 is connected with the top cover 2 through a main shaft 13; the top cover 2 and the bracket 3 are connected through a countershaft 14; the top cover 2 rotates freely around the main shaft 13, and the bracket 3 rotates freely around the auxiliary shaft 14; the base 1 is provided with a sample forming groove 4; overflow channels 5 are formed around the sample forming groove 4; the front end of the base 1 is provided with a clamping groove 6 which is matched with the bracket 3 and a guide inclined plane 7 which controls the bracket 3 to rotate; the front end of the base 1 is provided with a traction ring 8. The cross section of the sample forming groove 4 is round or square, the diameter or side length of the sample forming groove is 6-25.4 mm, and the groove depth is 1-2 mm. The width of the overflow 5 is 3mm, and the depth is 3mm. The included angle between the guide inclined plane 7 and the horizontal plane is 30 degrees. The cross section shape of one end of the bracket 3 is a semicircle with the radius of 3mm. The cross section of the clamping groove 6 is a combination of a part of semicircle with the radius of 3mm and a tangent line of the semicircle, and the clamping groove 6 is matched with the end face of the bracket 3. One end of the main shaft 13 is in interference fit with the shaft hole I9 on one side of the base 1, and one end of the auxiliary shaft 14 is in interference fit with the shaft hole III 11 on one side of the top cover 2. The base 1, the top cover 2, the bracket 3, the main shaft 13 and the auxiliary shaft 14 are all made of high-purity graphite materials; the grade of the high-purity graphite material is grade 4.
The operation steps of the apparatus and the sample preparation method will be described in detail with reference to fig. 2 to 6.
Under the protection of argon, the furnace temperature of the tubular furnace is raised to 1400 ℃ and kept warm, the top cover 2 is opened, excessive slag particles are stacked in the sample forming groove 4 by using a medicine spoon, the top cover 2 is rotated, the bracket 3 is jacked into the clamping groove 6, the top cover 2 is supported (shown in figure 2), then the tubular furnace end cover is opened, the sample preparation device is horizontally placed into the port of the tubular furnace, the furnace hook is used for stably pushing the sample preparation device into a furnace tube heating section, if the device is inclined, the furnace hook is used for adjusting the sample preparation device to be horizontal, finally, the tubular furnace end cover is closed for heating, and in the process of opening the tubular furnace, the protection air flow can be properly increased, and the air entering and burning loss devices are reduced.
After heating for 3-5 min, the slag particles are completely melted and gathered into drops (shown in figure 3), the end cover of the tube furnace is opened, the top cover 2 is lifted up by a furnace hook, the bracket 3 is separated from the clamping groove 6 and automatically rotates to a vertical state under the action of gravity (shown in figure 4), then the end cover is slowly put down, the bracket 3 gradually slides down and rotates under the action of the guide inclined plane 7, the supporting effect is not played any more, the top cover 2 gradually forms a closed cavity with the bottom surface and the sample forming groove 4 in the closing process, the slag is pressed into a sample shape, excessive slag flows into the overflow channel 5 (shown in figure 5), and the top cover 2 and the sample forming groove 4 are completely closed (shown in figure 6).
The traction ring 8 is hooked by a furnace hook, the device is rapidly and stably pulled out to a port of the tubular furnace, the device is rapidly clamped up and down by the crucible clamp, the device is guaranteed to be in a closed state, the device is horizontally clamped out and put into the high-temperature-resistant protective cover filled with argon gas for cooling, burning loss of the high-temperature device in the air is reduced, the service life is prolonged, and the device is waited for complete cooling.
Taking out the sample carefully, polishing with coarse metallographic sand paper to remove the surface layer reduced by graphite, polishing with fine metallographic sand paper to be smooth, measuring with a micrometer to the required size, removing surface dust, and finally placing into a sample support 3 of a laser heat conduction instrument for measurement. The thermal conductivity, thermal diffusivity, and specific heat capacity of the slag sample measured in this example are plotted against temperature as shown in fig. 8.
The embodiments described above are merely exemplary embodiments of the present utility model and are not all embodiments. It will be appreciated by those skilled in the art that other simple changes and modifications may be made to the embodiments of the utility model, which are intended to be covered by the appended claims and their description.
Claims (8)
1. A sample preparation device of a metallurgical slag sample of a laser heat conduction instrument comprises a base (1), a top cover (2) and a bracket (3); the method is characterized in that: the base (1) is provided with a shaft hole I (9); the top cover (2) is provided with a shaft hole II (10) and a shaft hole III (11); the bracket (3) is provided with a shaft hole IV (12); the base (1) is connected with the top cover (2) through a main shaft (13); the top cover (2) is connected with the bracket (3) through a countershaft (14); the top cover (2) rotates freely around the main shaft (13), and the bracket (3) rotates freely around the auxiliary shaft (14); the base (1) is provided with a sample forming groove (4); overflow channels (5) are formed around the sample forming groove (4); the front end of the base (1) is provided with a clamping groove (6) which is matched with the bracket (3) and a guide inclined plane (7) which controls the bracket (3) to rotate; the front end of the base (1) is provided with a traction ring (8).
2. The sample preparation device for metallurgical slag samples of a laser heat conduction instrument according to claim 1, wherein: the cross section of the sample forming groove (4) is round or square, the diameter or side length of the sample forming groove is 6-25.4 mm, and the groove depth is 1-2 mm.
3. The sample preparation device for metallurgical slag samples of a laser heat conduction instrument according to claim 1, wherein: the width of the overflow channel (5) is 3mm, and the depth is 3mm.
4. The sample preparation device for metallurgical slag samples of a laser heat conduction instrument according to claim 1, wherein: the included angle between the guide inclined plane (7) and the horizontal plane is 30 degrees.
5. The sample preparation device for metallurgical slag samples of a laser heat conduction instrument according to claim 1, wherein: the cross section shape of one end of the bracket (3) is a semicircle with the radius of 3mm.
6. The sample preparation device for metallurgical slag samples of a laser heat conduction instrument according to claim 1, wherein: the cross section of the clamping groove (6) is a combination of a part of a semicircle with the radius of 3mm and a circular tangent line of the semicircle, and the clamping groove (6) is matched with the end face of the bracket (3).
7. The sample preparation device for metallurgical slag samples of a laser heat conduction instrument according to claim 1, wherein: one end of the main shaft (13) is in interference fit with the shaft hole I (9) on one side of the base (1), and one end of the auxiliary shaft (14) is in interference fit with the shaft hole III (11) on one side of the top cover (2).
8. The sample preparation device for metallurgical slag samples of a laser heat conduction instrument according to claim 1, wherein: the base (1), the top cover (2), the bracket (3), the main shaft (13) and the auxiliary shaft (14) are all made of high-purity graphite materials; the grade of the high-purity graphite material is grade 4.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320385518.6U CN220399057U (en) | 2023-01-16 | 2023-01-16 | Sample preparation device for metallurgical slag sample of laser heat conduction instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320385518.6U CN220399057U (en) | 2023-01-16 | 2023-01-16 | Sample preparation device for metallurgical slag sample of laser heat conduction instrument |
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| Publication Number | Publication Date |
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| CN220399057U true CN220399057U (en) | 2024-01-26 |
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| CN202320385518.6U Active CN220399057U (en) | 2023-01-16 | 2023-01-16 | Sample preparation device for metallurgical slag sample of laser heat conduction instrument |
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| CN (1) | CN220399057U (en) |
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