CN110726662A - Experimental device for evaluating molten slag iron and erosion resistance of refractory material - Google Patents
Experimental device for evaluating molten slag iron and erosion resistance of refractory material Download PDFInfo
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Abstract
The invention discloses an experimental device for evaluating the molten slag iron and erosion resistance of a refractory material, which comprises an experimental furnace body and a masonry structure in the experimental furnace body, wherein the masonry structure comprises a furnace bottom refractory structure, a gas permeable brick layer, a side wall refractory structure and a hearth, and further comprises a cooling mechanism, a heating mechanism, a temperature measuring mechanism, a gas stirring mechanism and a tilting mechanism. The method can be used for researching the dynamic erosion of the slag iron circulation velocity to the refractory material and accurately evaluating the slag iron erosion resistance of the refractory material; the performance of the refractory material can be accurately reflected; the influence of chemical added into the slot on the refractory material is simulated; the thermocouple temperature probe is used for researching the temperature distribution of the refractory material; the mechanism of forming a protective layer on the hot surface of the blast furnace refractory material is researched through the corrosion of slag iron to the refractory material and the corrosion of harmful elements; the rate of change of mass of the refractory material in contact with the molten iron slag can also be measured; and the changes of the micro-morphology, the components and the phase of the refractory material after the experiment can be analyzed.
Description
Technical Field
The invention belongs to the technical field of refractory materials, and particularly relates to an experimental device for evaluating the molten slag iron and corrosion resistance of a refractory material.
Background
The long service life of the blast furnace hearth is one of the main reasons for limiting the service life of the blast furnace. Along with the reduction of the quality of the raw fuel and the increase of the loads of alkali metal and zinc, the environment of the blast furnace hearth is worse. The molten iron slag, coke and coal gas in the blast furnace hearth filling, and the lining material built in the hearth bear the damage of the molten iron slag, such as scouring, corrosion, infiltration, thermal stress, shear stress, chemical reaction and the like for a long time. In recent years, a plurality of large blast furnaces are burnt through by hearths, so that potential safety hazards are brought, and huge economic losses are brought to enterprises. Therefore, the method is very important for evaluating the performance of the refractory built in the hearth under the condition closer to the actual environment of the blast furnace.
The existing experimental method for the slag iron corrosion resistance and the corrosion indexes of alkali metal and zinc of the blast furnace refractory material has the following defects: (1) the method is carried out under the condition of no cooling, has a certain difference with the actual environment of a blast furnace hearth, and cannot represent whether a solidified protective layer can be formed on the hot surface of a refractory material in the production of a blast furnace; (2) each index is independently tested, the sample size of the experimental method is small, and results can be different when the sampling position is different; (3) the penetration depth, the micro appearance and the like of molten iron, alkali metal and zinc of the carbon brick are not characterized; (4) the slag iron corrosion resistance experiment is separately carried out, and the corrosion degree of the refractory material at the slag iron interface can not be represented; (5) the temperature distribution of the refractory material has not been evaluated at present.
Disclosure of Invention
The invention aims to provide an experimental device for evaluating the molten slag iron and erosion resistance of a refractory material, so as to solve the problems.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides an evaluation refractory material anti molten slag iron and erosion performance's experimental apparatus, includes the experiment stove body and sets up in this internal masonry structure of experiment stove, masonry structure wears to establish the ventilative brick layer including setting up in the stove bottom refractory structure of experiment stove body bottom, stove bottom refractory structure's middle part, and stove bottom refractory structure's top sets up lateral wall refractory structure, and lateral wall refractory structure is the annular, sets up furnace in the annular, set up cooling body on the experiment stove body, set up heating mechanism in the furnace, wear to establish temperature measurement mechanism respectively in furnace and the masonry structure, and the bottom on ventilative brick layer sets up gaseous rabbling mechanism, and the outside of experiment stove body sets up tilting mechanism.
The furnace bottom refractory structure consists of a plurality of furnace bottom refractory material layers, and each layer consists of a plurality of furnace bottom refractory bricks which are sequentially spliced along the circumferential direction; the lateral wall refractory structure is composed of a plurality of layers of lateral wall refractory material layers, each layer is formed by sequentially splicing a plurality of lateral wall refractory bricks along the circumferential direction, and an iron notch channel is arranged in the lateral wall refractory bricks in a penetrating mode and used for penetrating through a hearth and being arranged on an iron notch outside the experimental furnace body.
The side wall refractory bricks comprise outer ring refractory bricks and inner ring refractory bricks, thermocouple grooves are respectively arranged on the upper surfaces of the furnace bottom refractory bricks and the outer ring refractory bricks, the thermocouple grooves are radially arranged by taking the axis of the experimental furnace body as the circle center, and one side of each thermocouple groove close to the furnace wall of the experimental furnace body is open; and an erosion object groove is formed on the upper surface of at least one of the inner ring refractory bricks.
In order to cool the refractory material, the cooling mechanism comprises a plurality of groups of cold water pipes arranged on the inner wall of the experimental furnace body, the water inlet end and the water outlet end of each cold water pipe are respectively communicated with a water inlet pipeline and a water outlet pipeline through a water inlet surrounding pipe and a water outlet surrounding pipe arranged on the outer wall of the experimental furnace body, and a flow control valve is arranged on the water inlet pipeline. Wherein the cold water pipe adopts multiunit snakelike cold water pipe evenly distributed on the inner wall of experimental furnace body, and cooling water gets into the water inlet of cold water pipe behind the inlet water bustle pipe by the inlet channel, gets into the water outlet bustle pipe from the delivery port of cold water pipe and then discharges by outlet pipe way and accomplish cooling cycle promptly.
In order to melt the experimental raw materials added into the hearth, the heating mechanism comprises three graphite electrodes, a lifting device is arranged at the top end of each graphite electrode, and the graphite electrodes and the lifting device are communicated with the PLC through a short network system, a power supply device and a transformer.
In order to monitor the temperature and the performance of the refractory material, the temperature measuring mechanism comprises a hearth temperature measuring device and a refractory material temperature measuring device, the hearth temperature measuring device and the refractory material temperature measuring device respectively comprise a thermocouple temperature probe and a temperature monitoring device connected with the thermocouple temperature probe through a lead, the thermocouple temperature probe of the hearth temperature measuring device and the graphite electrode are parallelly arranged in the hearth in a penetrating mode, and the thermocouple temperature probes of the refractory material temperature measuring device are respectively arranged in a thermocouple groove. A thermocouple temperature measuring probe of the refractory material temperature measuring device is placed in the groove, then enters the ramming material, finally passes through a hole formed in the side wall of the experimental furnace body, is connected with the compensating lead, and is connected with the signal processing device to display the temperature.
The gas stirring mechanism comprises a gas inlet pipe arranged at the bottom of the gas permeable brick layer, the gas inlet pipe is communicated with a gas cylinder through a pipeline, and a rotor flow meter and a pressure reducing valve are arranged on the pipeline. The high-purity nitrogen in the gas cylinder penetrates through the air brick layer through the gas inlet pipe and enters the hearth, gas can be supplied into the hearth containing molten iron slag to stir the molten iron slag, and therefore the influence of the actual molten iron circulation speed of the blast furnace hearth on the erosion of refractory materials is simulated, wherein the rotameter is used for controlling the flow of the gas entering the air brick layer, and the pressure reducing valve is used for controlling the pressure of the gas entering the air brick layer.
A ramming material layer is arranged between the inner walls of the masonry structure and the experimental furnace body, and the cold water pipe is arranged in the ramming material layer. The ramming material layer is used for tightly sealing a gap between the masonry structure and the experimental furnace body.
In order to preserve heat of the hearth and prevent slag iron from splashing, the top of the hearth is provided with a furnace cover, and three electrode holes, a feeding hole and a temperature measuring hole are arranged on the furnace cover in a penetrating manner. The bell can prevent the influence of oxygen in the splash and the air of molten slag iron to the experimental result, and the charge door can be used to add the experiment raw materials to furnace.
Compared with the prior art, the invention has the beneficial effects that:
the device is provided with a bottom nitrogen blowing device to stir molten iron slag in the hearth, and the dynamic erosion of the iron slag circulation speed to refractory materials is researched by adjusting the volume flow of introduced nitrogen; the method is characterized in that a proper amount of iron blocks and blast furnace slag are added into a hearth, an electrode heating device is adopted to melt iron slag to form a molten iron slag layer, dynamic erosion to different refractory materials when the molten iron slag exists simultaneously can be simulated, the slag iron erosion resistance of the refractory materials can be evaluated more accurately, particularly the erosion resistance of the refractory materials at the slag iron interface is improved, meanwhile, the size of the refractory materials is large, the contact area with the molten iron slag is greatly increased compared with the traditional test mode, and the performance of the refractory materials can be reflected more accurately; the influence of alkali metal and zinc on the refractory material of a blast furnace hearth is simulated by grooving the refractory material and adding chemicals such as alkali metal and zinc; the temperature distribution of the refractory material can be evaluated through a thermocouple temperature probe arranged in the refractory material, and the temperature distribution of the refractory material is researched; the mechanism of forming a protective layer on the hot surface of the blast furnace refractory material is researched through the corrosion of slag iron to the refractory material and the corrosion of harmful elements, so that the refractory material which is more suitable for the long service life of the blast furnace is developed; after the experiment is finished, respectively measuring the mass change rate of the refractory material contacted with the molten iron slag; the changes in the microstructure (SEM-EDS), composition (XRF) and phase (XRD) of the refractory material after the experiment were then analyzed separately.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a portion of the masonry structure of the present invention (showing the erosion sink and thermocouple sink);
FIG. 3 is a schematic view showing the structure of the hearth refractory layer in the present invention;
FIG. 4 is a longitudinal sectional view of a test furnace body according to the present invention;
FIG. 5 is a schematic view of the construction of the furnace lid of the present invention;
FIG. 6 is a schematic structural diagram of a hearth temperature measuring device according to the present invention;
FIG. 7 is a schematic view showing the operation of the refractory temperature measuring device according to the present invention;
the reference numerals have the following meanings: 1. an experimental furnace body; 2. a furnace bottom refractory structure; 3. a gas permeable brick layer; 4. a sidewall refractory structure; 5. a hearth; 6. a tilting mechanism; 7. a hearth refractory layer; 8. hearth refractory bricks; 9. a layer of sidewall refractory material; 10. side wall refractory bricks; 11. a taphole channel; 14. an outer ring refractory brick; 15. an inner ring refractory brick; 16. a thermocouple well; 17. an erosion object groove; 18. a cold water pipe; 19. a water inlet surrounding pipe; 20. a water outlet surrounding pipe; 21. a water inlet pipeline; 22. a water outlet pipeline; 23. a flow control valve; 24. a graphite electrode; 25. a lifting device; 26. a short network system; 27. a power supply device; 28. a transformer; 29. a PLC; 30. a hearth temperature measuring device; 31. a refractory temperature measuring device; 32. a thermocouple temperature probe; 33. a temperature monitoring device; 34. an air inlet pipe; 35. a gas cylinder; 36. a rotameter; 37. a pressure reducing valve; 38. ramming the material layer; 39. a furnace cover; 40. an electrode hole; 41. a feed aperture; 42. a temperature measuring hole; 43. a taphole; 44. and (4) a slag iron pool.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in figures 1-7, an experimental device for evaluating the resistance of refractory materials to molten slag iron and erosion comprises an experimental furnace body 1 and a masonry structure arranged in the experimental furnace body 1, wherein the masonry structure comprises a furnace bottom refractory structure 2 arranged at the bottom of the experimental furnace body 1, a gas permeable brick layer 3 is arranged in the middle of the furnace bottom refractory structure 2 in a penetrating manner, a side wall refractory structure 4 is arranged above the furnace bottom refractory structure 2, the side wall refractory structure 4 is annular, a hearth 5 is arranged in the annular shape, a cooling mechanism is arranged on the experimental furnace body 1, a heating mechanism is arranged in the hearth 5, temperature measuring mechanisms are arranged in the hearth 5 and the masonry structure in a penetrating manner respectively, a gas stirring mechanism is arranged at the bottom of the gas permeable brick layer 3, and a tilting mechanism 6 is arranged outside the experimental furnace body 1.
The furnace bottom refractory structure 2 consists of a plurality of furnace bottom refractory material layers 7, and each layer is formed by sequentially splicing a plurality of furnace bottom refractory bricks 8 along the circumferential direction; the lateral wall refractory structure 4 is composed of a plurality of layers of lateral wall refractory material layers 9, each layer is formed by sequentially splicing a plurality of lateral wall refractory bricks 10 along the circumferential direction, and an iron notch channel 11 is arranged in the lateral wall refractory structure 4 in a penetrating mode and used for penetrating through the hearth 5 and arranging an iron notch 43 outside the experimental furnace body 1.
The side wall refractory bricks 10 comprise outer ring refractory bricks 14 and inner ring refractory bricks 15, thermocouple grooves 16 are respectively arranged on the upper surfaces of the furnace bottom refractory bricks 8 and the outer ring refractory bricks 14, the thermocouple grooves 16 are radially arranged by taking the axis of the experimental furnace body 1 as the circle center, and one side of each thermocouple groove 16 close to the furnace wall of the experimental furnace body 1 is open; an erosion material groove 17 is provided on the upper surface of at least one of the inner ring refractory bricks 14.
The cooling mechanism is including setting up a plurality of groups of cold water pipe 18 on the inner wall of experiment stove body 1, and the end of intaking and the play water end of cold water pipe 18 are linked together in inlet channel 21 and outlet channel 22 through setting up water inlet surrounding pipe 19 and the play water surrounding pipe 20 on the outer wall of experiment stove body 1 respectively, are equipped with flow control valve 23 on the inlet channel 21.
The heating mechanism comprises three graphite electrodes 24, a lifting device 25 is arranged at the top end of each graphite electrode 24, and the graphite electrodes 24 and the lifting device 25 are communicated with a PLC29 through a short network system 26, a power supply device 27 and a transformer 28.
The temperature measuring mechanism comprises a hearth temperature measuring device 30 and a refractory material temperature measuring device 31, the hearth temperature measuring device 30 and the refractory material temperature measuring device 31 both comprise a thermocouple temperature probe 32 and a temperature monitoring device 33 connected with the thermocouple temperature probe 32 through a lead, the thermocouple temperature probe 32 of the hearth temperature measuring device 30 and the graphite electrode 24 penetrate into the hearth 5 in parallel, and the thermocouple temperature probes 32 of the refractory material temperature measuring device 31 are respectively arranged in the thermocouple grooves 16.
The gas stirring mechanism comprises a gas inlet pipe 34 arranged at the bottom of the gas permeable brick layer 3, the gas inlet pipe 34 is communicated with a gas cylinder 35 through a pipeline, and a rotor flow meter 36 and a pressure reducing valve 37 are arranged on the pipeline.
A ramming material layer 38 is arranged between the masonry structure and the inner wall of the experimental furnace body 1, and the cold water pipe 18 is arranged in the ramming material layer 38.
The top of the hearth 5 is provided with a furnace cover 39, and the furnace cover 39 is provided with three electrode holes 40, a feeding hole 41 and a temperature measuring hole 42 in a penetrating manner.
Before the experiment, firstly building the air brick layer 3 at the bottom of the experimental furnace body 1, clamping the air inlet pipe 34 in a reserved hole at the bottom of the experimental furnace body 1 to communicate the air brick layer 3 with the air inlet pipe 34, then filling and covering the bottom of the experimental furnace body 1, namely, around the air brick layer 3 with ramming mass, then selecting refractory materials according to experimental design to lay a building structure around the air brick layer 3, firstly mutually splicing 4 pieces of furnace bottom refractory bricks 8 to form a furnace bottom refractory material layer 7, sequentially upwards superposing and laying according to the designed layer number, after laying the furnace bottom refractory structure 2, aligning the top surface of the air brick layer 3 with the top surface of the furnace bottom refractory material layer 7, then laying the side wall refractory structure 4 on the furnace bottom refractory structure 2, firstly mutually splicing 4 pieces of side wall refractory bricks 10 to form an annular side wall refractory material layer 9, namely laying the inner ring refractory bricks 15 and the outer ring 14 layer, filling a gap around a snakelike cold water pipe 18 with corresponding height by using ramming mass every layer is built, laying an inner ring refractory brick 14 provided with an erosion object groove 17 according to the middle layer selected by design, putting chemical reagents such as alkali metal, zinc and the like selected in the design into the erosion object groove 17 in advance, then covering and laying the inner ring refractory brick 15 without the erosion object groove 17, opening an iron outlet channel 11 to penetrate through a hearth 5 and an iron outlet 43, aligning a thermocouple groove with an opening reserved on the side wall of an experimental furnace body 1 when laying each layer of hearth refractory structure 2 and side wall refractory structure 4, inserting a thermocouple temperature probe 32 into the thermocouple groove 16 after penetrating the thermocouple groove from the opening on the side wall of the experimental furnace body 1, when the masonry structure is completely laid, a ramming mass layer 38 is formed, and at this time, a furnace cover 39 is covered on the top surface of the hearth 5 and fixed.
In carrying out the experiment:
1. starting electronic devices such as the short net system 26, the power supply device 27, the transformer 28, the PLC29 and the temperature detection device 33, opening the gas cylinder 35 to adjust the gas flow and pressure through the pressure reducing valve 37 and the rotor flow meter 36 to introduce nitrogen into the air brick layer 3, adjusting the cooling water quantity according to the experimental design scheme, opening the circulating water system, adjusting the flow control valve 13 to enable water to sequentially pass through the water inlet pipeline 21, the water inlet surrounding pipe 19, the cold water pipe 18, the water outlet surrounding pipe 20 and the water outlet pipeline 22 under the designed pressure and flow, and finally entering the water tank to finish circulating cooling.
2. The graphite electrode 24 is lifted to leave the experimental furnace body 1 by starting the lifting device 25 through the PLC29, an iron block is added through the feeding hole 41, the PLC29 adjusts the current of the power supply device 27 to a design value, the voltage of the transformer 28 to the design value, after the electrode platform is confirmed to be operated without people, the closing permission key switch is opened and the closing knob is pressed, the transformer 28 is turned on at one time, and the 3-phase electrode voltage meter indicates the closing permission key switch. And then the PLC29 starts the lifting device 25 to lead the graphite electrodes 24 to descend along the vertical direction, when 3 graphite electrodes 24 respectively pass through the electrode holes 40 and contact with the furnace burden, the graphite electrodes stop descending, at the moment, electric arcs are generated, and the electric furnace starts to smelt.
3. When the added iron blocks are completely melted, the PLC29 starts the lifting device 25 to lift the graphite electrode 24, when the arc flow is reduced to 0, the switch is switched off to disconnect the transformer 28, then the graphite electrode 24 is lifted away from the experimental furnace body 1, the thermocouple temperature probe 32 of the hearth temperature measuring device 30 is inserted into the temperature measuring hole 42 to measure the temperature of molten iron, after the temperature reaches the temperature required by the experiment, the blast furnace slag is added through the feeding hole 41, and the smelting is restarted according to the operation mode during the initial feeding.
4. After the blast furnace slag is completely melted, the heating power can be adjusted to a proper value through the power supply device 27 and the transformer 28 according to the experimental design, and the temperature and the time required by the experiment are reached, so that the smelting process is completed.
5. After smelting, open tap hole 43 and through tilting mechanism 6 make the tilting tapping of experimental furnace body 1 to the slag iron pond 44 in, the tapping finishes to return experimental furnace body 1 to horizontal position fast, treats the furnace body cooling back, stops the cooling water, stops letting in nitrogen gas, takes out a sample after tearing open the stove.
6. And analyzing the acquired data according to an experimental design scheme, analyzing the components, phases, micro-morphology and macro-morphology of the refractory material, and determining the damage mechanism of the refractory material.
Claims (9)
1. An experimental device for evaluating the molten slag iron and erosion resistance of a refractory material is characterized in that: including experiment stove body (1) and set up the masonry structure in experiment stove body (1), masonry structure wears to establish ventilative brick layer (3) including setting up in the stove bottom refractory structure (2) of experiment stove body (1) bottom, the middle part of stove bottom refractory structure (2), and the top of stove bottom refractory structure (2) sets up lateral wall refractory structure (4), and lateral wall refractory structure (4) are the annular, sets up furnace (5) in the annular, set up cooling body on experiment stove body (1), set up heating mechanism in furnace (5), wear to establish temperature measurement mechanism respectively in furnace (5) and the masonry structure, and the bottom on ventilative brick layer (3) sets up gaseous rabbling mechanism, and the outside of experiment stove body (1) sets up tilting mechanism (6).
2. The experimental apparatus for evaluating the resistance of a refractory material to molten slag iron and erosion as set forth in claim 1, wherein: the furnace bottom refractory structure (2) consists of a plurality of furnace bottom refractory material layers (7), and each layer is formed by sequentially splicing a plurality of furnace bottom refractory bricks (8) along the circumferential direction; lateral wall refractory structure (4) comprise a plurality of layers of lateral wall refractory material layer (9), and every layer is formed by splicing a plurality of lateral wall resistant bricks (10) in proper order along the circumferencial direction, wears to be equipped with taphole passageway (11) in lateral wall refractory structure (4) for link up furnace (5) and set up in taphole (43) of experiment furnace body (1) outside.
3. The experimental apparatus for evaluating the molten slag iron and erosion resistance of a refractory material according to claim 2, wherein: the side wall refractory bricks (10) comprise outer ring refractory bricks (14) and inner ring refractory bricks (15), thermocouple grooves (16) are respectively formed in the upper surfaces of the furnace bottom refractory bricks (8) and the outer ring refractory bricks (14), the thermocouple grooves (16) are radially arranged by taking the axis of the experimental furnace body (1) as the circle center, and one end, close to the furnace wall of the experimental furnace body (1), of each thermocouple groove (16) is open; an erosion object groove (17) is arranged on the upper surface of at least one of the inner ring refractory bricks (15).
4. The experimental facility for evaluating the molten slag iron and erosion resistance of a refractory material according to claim 3, wherein: the cooling mechanism comprises a plurality of groups of cold water pipes (18) arranged on the inner wall of the experimental furnace body (1), the water inlet ends and the water outlet ends of the cold water pipes (18) are respectively communicated with a water inlet surrounding pipe (19) and a water outlet surrounding pipe (20) on the outer wall of the experimental furnace body (1) through arrangement, a water inlet pipeline (21) and a water outlet pipeline (22) are communicated, and a flow control valve (23) is arranged on the water inlet pipeline (21).
5. The experimental facility for evaluating the molten slag iron and erosion resistance of a refractory material according to claim 4, wherein: the heating mechanism comprises three graphite electrodes (24), a lifting device (25) is arranged at the top end of each graphite electrode (24), and the graphite electrodes (24) and the lifting device (25) are communicated with a PLC (29) through a short network system (26), a power supply device (27) and a transformer (28).
6. The experimental facility for evaluating the molten slag iron and erosion resistance of a refractory material according to claim 5, wherein: the temperature measuring mechanism comprises a hearth temperature measuring device (30) and a refractory material temperature measuring device (31), the hearth temperature measuring device (30) and the refractory material temperature measuring device (31) respectively comprise a thermocouple temperature probe (32) and a temperature monitoring device (33) connected with the thermocouple temperature probe (32) through a lead, the thermocouple temperature probe (32) of the hearth temperature measuring device (30) and a graphite electrode (24) are parallelly arranged in a hearth (5) in a penetrating mode, and the thermocouple temperature probe (32) of the refractory material temperature measuring device (31) is respectively arranged in a thermocouple groove (16).
7. The experimental facility for evaluating the molten slag iron and erosion resistance of a refractory material according to claim 6, wherein: the gas stirring mechanism comprises a gas inlet pipe (34) arranged at the bottom of the gas permeable brick layer (3), the gas inlet pipe (34) is communicated with a gas cylinder (35) through a pipeline, and a rotameter (36) and a pressure reducing valve (37) are arranged on the pipeline.
8. The experimental apparatus for evaluating the resistance of a refractory material to molten slag iron and erosion as set forth in claim 7, wherein: a ramming material layer (38) is arranged between the masonry structure and the inner wall of the experimental furnace body (1), and the cold water pipe (18) is arranged in the ramming material layer (38).
9. The experimental apparatus for evaluating the resistance of a refractory material to molten slag iron and erosion as set forth in claim 8, wherein: the top of the hearth (5) is provided with a furnace cover (39), and the furnace cover (39) is provided with three electrode holes (40), a feeding hole (41) and a temperature measuring hole (42) in a penetrating way.
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| CN112525745A (en) * | 2020-11-03 | 2021-03-19 | 北京科技大学 | Physical simulation test device for scouring erosion of tundish lining refractory and using method |
| CN113702426A (en) * | 2021-09-24 | 2021-11-26 | 中国建材检验认证集团股份有限公司 | Test device and test method for evaluating overall heat insulation performance of refractory material |
| CN116399129A (en) * | 2023-06-09 | 2023-07-07 | 广东科达新能源装备有限公司 | Refractory material heat insulation performance test furnace and test method |
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