Refractory material thermal conductivity detection device and method

Abstract

A device and method for detecting the thermal conductivity of refractory materials, relating to the field of thermal conductivity measurement. The device and method for detecting the thermal conductivity of refractory materials include a detection box, a refractory material placement box, a lifting mechanism for driving the refractory material placement box to rise and fall, a pair of heating plates arranged on both sides below the refractory material placement box, and a heat-conducting pressing mechanism connecting the lifting mechanism and the two heating plates. Heat-conducting holes corresponding to the two heating plates are respectively opened on both sides of the refractory material placement box, and a first temperature sensor for detecting the temperature of the refractory material is provided at the center of the bottom wall of the refractory material placement box; when the lifting mechanism drives the refractory material placement box to descend to a preset position, the heat-conducting pressing mechanism drives the two heating plates to move toward each other and engage with the two heat-conducting holes, and the two heating plates are respectively connected to a second temperature sensor. The device and method for detecting the thermal conductivity of refractory materials can achieve the flattening and overall stability of flexible refractory materials, and ensure the accuracy of the thermal conductivity detection of flexible refractory materials.

Description

Technical Field

[0001] The present application relates to the field of thermal conductivity measurement, and in particular to a device and method for detecting the thermal conductivity of refractory materials. Background Art

[0002] Refractory materials are widely used in high-temperature furnace lining materials, high-temperature equipment, and refractory bricks in the metallurgical field. The thermal conductivity of refractory materials directly affects their performance, so the thermal conductivity coefficient test of refractory materials is very important.

[0003] The thermal conductivity of refractory materials is directly related to their surface flatness and material thickness. When testing the thermal conductivity of flexible refractory materials, the flexible refractory material samples are prone to flow and spread out during the heating process, causing their flatness and thickness to change and resulting in changes in the thermal conductivity, making it difficult to detect the accurate thermal conductivity of the flexible refractory materials.

[0004] Therefore, a device and method for detecting the thermal conductivity of refractory materials are needed to detect the thermal conductivity of flexible refractory materials that are easy to flow and spread. Summary of the Invention

[0005] The purpose of the present application is to provide a device and method for detecting the thermal conductivity of refractory materials, which can achieve the flattening and overall stability of flexible refractory materials and ensure the accuracy of thermal conductivity detection of flexible refractory materials.

[0006] This application is implemented as follows:

[0007] The present application provides a device for detecting the thermal conductivity coefficient of refractory materials, which includes a detection box, a refractory material placement box that can be lifted and lowered in the detection box, a lifting mechanism for driving the refractory material placement box to lift and lower, a pair of heating plates arranged on both sides below the refractory material placement box, and a heat-conducting pressing mechanism respectively connected to the lifting mechanism and the two heating plates, wherein heat-conducting holes corresponding to the two heating plates are respectively opened on both sides of the refractory material placement box, and a first temperature sensor for detecting the temperature of the refractory material is provided at the center of the bottom wall of the refractory material placement box; when the lifting mechanism drives the refractory material placement box to descend to a preset position, the heat-conducting pressing mechanism drives the two heating plates to move toward each other and be engaged with the two heat-conducting holes, and the two heating plates are respectively connected to second temperature sensors for detecting their temperatures.

[0008] In some optional embodiments, the lifting mechanism includes a cylinder rod connected to the cylinder on the top of the refractory material placement box, a traction rod fixedly mounted on and connected to the cylinder rod, and two symmetrically arranged downward pressure links. The downward pressure links include a horizontal rod, an oblique push rod and a vertical insertion rod connected in sequence. The horizontal rods of the two downward pressure links are respectively connected to the two ends of the traction rod.

[0009] In some optional embodiments, the heat-conducting pressing mechanism includes at least two slide rails and two pushing sliders provided in the detection box body, the two pushing sliders are respectively slidably provided on at least one slide rail, the two pushing sliders are respectively connected to the two heating plates, and the two pushing sliders are respectively provided with sockets corresponding to the vertical plug rods; when the cylinder rod of the cylinder is extended to drive the refractory material placement box to descend to a preset position, it drives the two downward-pressing connecting rods to descend synchronously, so that the two downward-pressing connecting rods are respectively inserted into the two sockets and push the two pushing sliders to move toward each other to clamp the two heating plates to the two heat-conducting holes.

[0010] In some optional implementation schemes, two reset plates are further provided in the detection box, and the two reset plates are respectively connected to the two propulsion sliders through telescopic rods. The two telescopic rods are respectively provided with reset springs, and the two ends of the reset springs are respectively connected to the reset plates and the corresponding propulsion sliders. When the lifting mechanism drives the refractory material placement box to rise, the two reset springs respectively drive the two propulsion sliders to move away from each other so that the two heating plates are separated from the two heat conduction holes.

[0011] In some optional embodiments, both ends of the refractory material placement box are provided with openings.

[0012] In some optional embodiments, two opening limiting blocks are also included.

[0013] In some optional embodiments, the bottom wall of the detection box is provided with a pre-buried slot for clamping the bottom of the refractory material placement box.

[0014] The present application also provides a method for detecting the thermal conductivity of a refractory material, which is performed using the above-mentioned device for detecting the thermal conductivity of a refractory material, and comprises the following steps:

[0015] Place the refractory material test block inside the refractory material placement box, and make the two sides of the refractory material test block fit the two heat conduction holes;

[0016] The heating plates are controlled to heat up for preheating, and the lifting mechanism is controlled to drive the refractory material placement box to descend to a preset position, so that the heat conduction pressing mechanism drives the two heating plates to move toward each other and engage with the two heat conduction holes;

[0017] Use two heating plates to heat both sides of the refractory material test block to a preset temperature, and use a first temperature sensor provided in the center of the bottom wall of the refractory material placement box to detect the temperature in the middle of the refractory material test block, and use two second temperature sensors to detect the temperature of the two heating plates to calculate the thermal conductivity of the refractory material test block.

[0018] In some optional embodiments, the following formula is used to calculate the thermal conductivity of the refractory material test block:

[0019]

[0020] Where λ is the thermal conductivity, w / m·K; P is the heating power, W; L is the distance between the two heating plates on both sides of the refractory test block, m; A is the surface area of ​​the refractory test block on both sides of the two heating plates, m 2 ; T2-T1 is the temperature gradient difference from both sides to the center of the refractory test block, that is, the temperature difference between the temperatures detected by the first temperature sensor and the second temperature sensor, usually expressed in K.

[0021] In some optional embodiments, when two heating plates are used to heat both sides of the refractory material test block to a preset temperature, both sides of the refractory material test block are first heated to 50-100°C lower than the preset temperature at a heating rate of 5-10°C / min, and then the refractory material test block is continued to be heated to the preset temperature at a heating rate of 3-5°C / min.

[0022] The beneficial effects of the present application are as follows: the refractory material thermal conductivity detection device provided by the present application includes a detection box, a refractory material placement box that can be lifted and lowered in the detection box, a lifting mechanism for driving the refractory material placement box to lift and lower, a pair of heating plates arranged on both sides of the lower side of the refractory material placement box, and a heat-conducting pressing mechanism connected to the lifting mechanism and the two heating plates respectively. Heat-conducting holes corresponding to the two heating plates are respectively opened on both sides of the refractory material placement box, and a first temperature sensor for detecting the temperature of the refractory material is provided at the center of the bottom wall of the refractory material placement box; when the lifting mechanism drives the refractory material placement box to descend to a preset position, the heat-conducting pressing mechanism drives the two heating plates to move toward each other and engage with the two heat-conducting holes. The two heating plates are respectively connected to second temperature sensors for detecting their temperatures. The refractory material thermal conductivity detection device and method provided by the present application achieve the flattening and stability of the flexible refractory material and the overall stability through the cooperation of the refractory material placement box and the two heating plates, thereby ensuring the accuracy of the thermal conductivity detection of the flexible refractory material. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A schematic structural diagram of a device for detecting thermal conductivity of refractory materials provided in an embodiment of the present application;

[0025] Figure 2 This is a schematic diagram of the structure of the refractory material thermal conductivity detection device provided in an embodiment of the present application with part of the detection box omitted;

[0026] Figure 3 A schematic diagram of the partial structure of the refractory material thermal conductivity detection device provided in an embodiment of the present application, with part of the detection box and the heat-conducting pressing mechanism omitted;

[0027] Figure 4 This is a schematic diagram of the structure of the refractory material thermal conductivity detection device provided in an embodiment of the present application, omitting some of the detection box, refractory material placement box and lifting mechanism;

[0028] Figure 5 This is a schematic cross-sectional structural diagram of a refractory material placement box of a refractory material thermal conductivity detection device provided in an embodiment of the present application.

[0029] In the figure: 100, detection box; 110, refractory material placement box; 111, opening; 120, heating plate; 130, heat conduction hole; 140, first temperature sensor; 150, limit block; 160, embedded slot; 170, second temperature sensor; 200, lifting mechanism; 210, cylinder; 220, traction rod; 230, downward pressure connecting rod; 231, horizontal rod; 232, oblique push rod; 233, vertical insertion rod; 240, cylinder bracket; 300, heat conduction pressing mechanism; 310, slide rail; 320, push slider; 330, socket; 340, reset plate; 350, telescopic rod; 360, reset spring; 370, connecting plate; 380, connecting seat; 390, connecting rod. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0033] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0035] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0036] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0037] The features and performance of the device and method for detecting thermal conductivity of refractory materials of the present application are further described in detail below in conjunction with the embodiments.

[0038] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5As shown, the embodiment of the present application provides a refractory material thermal conductivity detection device, which includes a detection box 100, a refractory material placement box 110 that can be lifted and lowered in the detection box 100, a lifting mechanism 200 for driving the refractory material placement box 110 to lift and lower, a pair of heating plates 120 provided on both sides below the refractory material placement box 110, and a heat-conducting pressing mechanism 300 connected to the lifting mechanism and the two heating plates 120 respectively. The interior of the detection box 100 is used to accommodate refractory material samples for thermal conductivity detection. Heat-conducting holes 130 corresponding to the two heating plates 120 are respectively opened on both sides of the refractory material placement box 110. The two ends of the refractory material placement box 110 are respectively An opening 111 and a limiting block 150 for inserting the opening 111 to limit the position of the refractory material sample are provided. A first temperature sensor 140 for detecting the temperature of the refractory material is provided at the center of the inner bottom wall of the refractory material placement box 110. The bottoms of the two heating plates 120 are respectively connected to second temperature sensors 170 for detecting their temperatures. The inner bottom wall of the detection box 100 is provided with a pre-buried card slot 160 for clamping the bottom of the refractory material placement box 110; when the lifting mechanism 200 drives the refractory material placement box 110 to descend to the bottom and clamp into the pre-buried card slot 160, the heat-conducting pressing mechanism 300 drives the two heating plates 120 to move toward each other and clamp into the two heat-conducting holes 130.

[0039] Among them, the lifting mechanism 200 includes a cylinder 210 fixedly connected to the top of the detection box 100 through a cylinder bracket 240, the cylinder rod of the cylinder 210 is arranged vertically and connected to the top of the refractory material placement box 110, and a horizontally arranged traction rod 220 is fixedly sleeved on the cylinder rod of the cylinder 210. Two symmetrically arranged downward pressure connecting rods 230 are connected to both ends of the traction rod 220. Each downward pressure connecting rod 230 includes a horizontal rod 231, an oblique push rod 232 and a vertical insertion rod 233 connected in sequence. The oblique push rod 232 is arranged at a 45-degree angle to the horizontal plane. The horizontal rods 231 of the two downward pressure connecting rods 230 are respectively connected to the two ends of the traction rod 220.

[0040] The cam 320 of the second end is provided with the support 310 of the second end cap 320, and the support 310 of the second end cap 320 is provided with the support 310 of the second end cap 320. Reset plates 340 are provided at both ends of the inner bottom wall of the detection box 100, and the two pushing sliders 320 are respectively connected to the connecting plates 370. The two reset plates 340 are respectively connected to the two connecting plates 370 through telescopic rods 350. The two telescopic rods 350 are respectively provided with reset springs 360. The two ends of the reset springs 360 are respectively connected to the reset plates 340 and the corresponding connecting plates 370. When the lifting mechanism 200 drives the refractory material placement box 110 to rise, it drives the oblique push rods 232 of the two downward pressing connecting rods 230 to stop pushing the two pushing sliders 320. The two reset springs 360 respectively drive the two pushing sliders 320 to move away from each other so that the two heating plates 120 are separated from the two heat conduction holes 130.

[0041] The present application also provides a method for detecting the thermal conductivity of a refractory material, which is performed using the above-mentioned device for detecting the thermal conductivity of a refractory material, and includes the following steps:

[0042] Step 1: Process the refractory material into a rectangular parallelepiped test block that fits the internal space of the refractory material placement box 110, and then place it inside the refractory material placement box 110, so that the two sides of the refractory material test block are respectively in contact with the heat conduction holes 130 opened on both sides of the refractory material placement box 110, and insert two limiting blocks 150 into the openings 111 at both ends of the refractory material placement box 110 to define the position of the refractory material sample;

[0043] Step 2: Control the heating plate 120 to heat up for preheating, control the cylinder 210 of the lifting mechanism 200 to start and extend the cylinder rod to drive the refractory material placement box 110 to descend to the bottom of the refractory material placement box 110 and snap into the embedded slot 160, so that when the cylinder rod is extended, it drives the traction rod 220 and the two downward pressing connecting rods 230 to descend until the two vertical insertion rods 233 are respectively inserted into the two upper insertion holes 330 of the two pushing sliders 320, and the oblique push rods 232 of the two downward pressing connecting rods 230 respectively push the two pushing sliders 320 to move towards each other to snap the two heating plates 120 into the two heat conducting holes 130, and drive the telescopic rod 350 connected to the two pushing sliders 320 to extend and stretch the two return springs 360;

[0044] Step three, use two heating plates 120 to heat both sides of the refractory material test block to a preset temperature, use the first temperature sensor 140 provided at the center of the inner bottom wall of the refractory material placement box 110 to intermittently detect the temperature of the middle part of the refractory material test block, and use two second temperature sensors 170 to intermittently detect the temperature of the two heating plates 120 respectively, and calculate the thermal conductivity of the refractory material test block; optionally, when using two heating plates 120 to heat both sides of the refractory material test block to a preset temperature, first heat both sides of the refractory material test block to 50-100°C lower than the preset temperature at a heating rate of 5-10°C / min, and then continue to heat the refractory material test block to the preset temperature at a heating rate of 3-5°C / min.

[0045] The following formula is used to calculate the thermal conductivity of refractory test blocks:

[0046]

[0047] Wherein, λ is the thermal conductivity, w / m·K; P is the heating power, W; L is the distance between the two heating plates 120 on both sides of the refractory material specimen, m; A is the surface area of ​​the refractory material specimen on both sides and the two heating plates 120, m 2 ; T2-T1 is the temperature gradient difference from both sides to the center of the refractory test block, that is, the temperature difference between the temperatures detected by the first temperature sensor 140 and the second temperature sensor 170, usually expressed in K.

[0048] The refractory material thermal conductivity detection device and method provided in the embodiment of the present application is provided with a liftable refractory material placement box 110 to accommodate the refractory material sample, and a heat conduction hole 130 corresponding to the heating plate 120 is opened on both sides of the refractory material placement box 110. When the lifting mechanism 200 is used to drive the refractory material placement box 110 containing the refractory material sample to descend to a preset position, the heat conduction pressing mechanism 300 drives a pair of heating plates 120 to move synchronously in a direction close to each other and clamp the two heat conduction holes 130, thereby using a pair of heating plates 120 and the refractory material placement box 110 to define the position of the refractory material sample and to The refractory material sample is heated on both sides, and the first temperature sensor 140 arranged at the center of the bottom wall of the refractory material placement box 110 and the second temperature sensor 170 connected to the heating plate 120 respectively detect the temperature of the middle and side of the refractory material sample, so as to calculate the thermal conductivity coefficient of the refractory material sample. The refractory material placement box 110 and the two heating plates 120 can be used in conjunction to achieve the flattening and overall stability of the flexible refractory material, eliminate the influence of factors such as wrinkles on the surface of the flexible refractory material, and eliminate the influence of the hot wire body on the detection effect, thereby ensuring the accuracy of the detection and adapting to refractory materials of various materials.

[0049] In addition, after the inspection is completed, the lifting mechanism 200 drives the refractory material placement box 110 containing the refractory material sample to rise, driving the oblique push rods 232 of the two downward pressing connecting rods 230 to stop pushing the two pushing sliders 320, so that the two reset springs 360 connected to the two reset plates 340 respectively drive the two pushing sliders 320 to move away from each other, driving the two heating plates 120 to disengage from the two heat conduction holes 130 and reset, and causing the two telescopic rods 350 to retract and reset, so that the inspectors do not need to manually contact the high-temperature inspection box 100, ensuring the safety of the inspection process and improving the convenience and efficiency of subsequent inspections.

[0050] Example 1

[0051] The present application also provides a method for detecting the thermal conductivity of a refractory material, which is performed using the above-mentioned device for detecting the thermal conductivity of a refractory material, and includes the following steps:

[0052] Step 1: Process the refractory material into a rectangular refractory material test block that fits the internal space of the refractory material placement box 110, and then place it inside the refractory material placement box 110, so that the two side surfaces of the refractory material test block are respectively in contact with the heat conduction holes 130 opened on both sides of the refractory material placement box 110, and insert two limiting blocks 150 into the openings 111 at both ends of the refractory material placement box 110 to limit the position of the refractory material sample. The length, width and height of the refractory material test block are 230 mm × 114 mm × 75 mm respectively;

[0053] Step 2: Control the heating plate 120 to heat up for preheating, control the cylinder 210 of the lifting mechanism 200 to start and extend the cylinder rod to drive the refractory material placement box 110 to descend to the bottom of the refractory material placement box 110 and snap into the embedded slot 160, so that when the cylinder rod is extended, it drives the traction rod 220 and the two pressing links 230 to descend until the two vertical insertion rods 233 are respectively inserted into the two upper holes 330 of the pushing sliders 320, and the oblique push rods 232 of the two pressing links 230 respectively push the two pushing sliders 320 towards each other to snap the two heating plates 120 into the two heat conducting holes 130;

[0054] Step 3: Use two heating plates 120 to heat both sides of the refractory test block to a preset temperature. First, heat both sides of the refractory test block to 1250°C at a heating rate of 8°C / min, and then continue to heat the refractory test block to 1300°C at a heating rate of 5°C / min. Use the first temperature sensor 140 provided at the center of the inner bottom wall of the refractory placement box 110 to detect the temperature of the middle part of the refractory test block at 1000°C, and use two second temperature sensors 170 to detect the temperature of the two heating plates 120 at intervals of 1300°C, and calculate the thermal conductivity of the refractory test block.

[0055] The following formula is used to calculate the thermal conductivity of refractory test blocks:

[0056] therefore, In this embodiment, a three-phase AC heating plate 120 is used, and P is set to 880 W, so the obtained λ=2.10 w / m·K.

[0057] Example 2

[0058] The present application also provides a method for detecting the thermal conductivity of a refractory material, which is performed using the above-mentioned device for detecting the thermal conductivity of a refractory material, and includes the following steps:

[0059] Step 1: Process the refractory material into a rectangular parallelepiped refractory material test block that fits the internal space of the refractory material placement box 110, and then place it inside the refractory material placement box 110, so that the two side surfaces of the refractory material test block are respectively in contact with the heat conduction holes 130 opened on both sides of the refractory material placement box 110, and insert two limiting blocks 150 into the openings 111 at both ends of the refractory material placement box 110 to limit the position of the refractory material sample. The length, width and height of the refractory material test block are 230 mm × 150 mm × 65 mm respectively;

[0060] Step 2: Control the heating plate 120 to heat up for preheating, control the cylinder 210 of the lifting mechanism 200 to start and extend the cylinder rod to drive the refractory material placement box 110 to descend to the bottom of the refractory material placement box 110 and snap into the embedded slot 160, so that when the cylinder rod is extended, it drives the traction rod 220 and the two pressing links 230 to descend until the two vertical insertion rods 233 are respectively inserted into the two upper holes 330 of the pushing sliders 320, and the oblique push rods 232 of the two pressing links 230 respectively push the two pushing sliders 320 towards each other to snap the two heating plates 120 into the two heat conducting holes 130;

[0061] Step 3: Use two heating plates 120 to heat both sides of the refractory test block to a preset temperature. First, heat both sides of the refractory test block to 1350°C at a heating rate of 10°C / min, and then continue to heat both sides of the refractory test block to 1410°C at a heating rate of 3°C / min. Use the first temperature sensor 140 provided at the center of the inner bottom wall of the refractory placement box 110 to detect the temperature of the middle part of the refractory test block at intervals of 1130°C, and use two second temperature sensors 170 to detect the temperature of the two heating plates 120 at intervals of 1410°C, and calculate the thermal conductivity of the refractory test block.

[0062] The following formula is used to calculate the thermal conductivity of refractory test blocks:

[0063] therefore, In this embodiment, a three-phase AC heating plate 120 is used, and P is set to 1150 W, so the obtained λ=1.935 w / m·K.

[0064] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

Claims

1. A device for detecting thermal conductivity of refractory materials, characterized in that: It includes a detection box, a refractory material placement box which is liftable and arranged in the detection box, a lifting mechanism for driving the refractory material placement box to be lifted and lowered, a pair of heating plates arranged on both sides of the lower side of the refractory material placement box, and a heat-conducting pressing mechanism respectively connected to the lifting mechanism and the two heating plates. Heat-conducting holes corresponding to the two heating plates are respectively opened on both sides of the refractory material placement box, and a first temperature sensor for detecting the temperature of the refractory material is provided at the center of the bottom wall of the refractory material placement box; when the lifting mechanism drives the refractory material placement box to descend to a preset position, the heat-conducting pressing mechanism drives the two heating plates to move toward each other and be engaged with the two heat-conducting holes, and the two heating plates are respectively connected to second temperature sensors for detecting their temperatures.

2. The refractory material thermal conductivity detection device according to claim 1, characterized in that: The lifting mechanism includes a cylinder rod connected to the cylinder on the top of the refractory material placement box, a traction rod fixedly mounted and connected to the cylinder rod, and two symmetrically arranged downward pressure connecting rods. The downward pressure connecting rods include a horizontal rod, an oblique push rod and a vertical insertion rod connected in sequence. The horizontal rods of the two downward pressure connecting rods are respectively connected to the two ends of the traction rod.

3. The refractory material thermal conductivity detection device according to claim 2, characterized in that: The heat-conducting pressing mechanism includes at least two slide rails and two pushing sliders provided in the detection box body, the two pushing sliders are respectively slidably provided on at least one of the slide rails, the two pushing sliders are respectively connected to the two heating plates, and the two pushing sliders are respectively provided with sockets corresponding to the vertical insertion rods; when the cylinder rod of the cylinder is extended to drive the refractory material placement box to descend to a preset position, it drives the two pressing connecting rods to descend synchronously, so that the two pressing connecting rods are respectively inserted into the two sockets and then push the two pushing sliders to move toward each other to clamp the two heating plates to the two heat-conducting holes.

4. The refractory material thermal conductivity detection device according to claim 3, characterized in that: Two reset plates are also provided in the detection box body, and the two reset plates are respectively connected to the two propulsion sliders through telescopic rods. The two telescopic rods are respectively provided with reset springs, and the two ends of the reset springs are respectively connected to the reset plates and the corresponding propulsion sliders. When the lifting mechanism drives the refractory material placement box to rise, the two reset springs respectively drive the two propulsion sliders to move away from each other so that the two heating plates are separated from the two heat-conducting holes.

5. The refractory material thermal conductivity detection device according to claim 1, characterized in that: Both ends of the refractory material placement box are respectively provided with openings.

6. The refractory material thermal conductivity detection device according to claim 5, characterized in that: It also includes two limiting blocks for the openings.

7. The refractory material thermal conductivity detection device according to claim 1, characterized in that: The bottom wall of the detection box body is provided with a pre-buried card slot for clamping the bottom of the refractory material placement box.

8. A method for detecting thermal conductivity of refractory materials, characterized in that: The method is carried out using the refractory material thermal conductivity detection device according to any one of claims 1 to 7, and comprises the following steps: Placing the refractory material test block inside the refractory material placement box, and making the two sides of the refractory material test block fit the two heat conduction holes; Controlling the heating plate to heat up for preheating, controlling the lifting mechanism to drive the refractory material placement box to descend to a preset position, and causing the heat-conducting pressing mechanism to drive the two heating plates to move toward each other and engage with the two heat-conducting holes; Use the two heating plates to heat both sides of the refractory material test block to a preset temperature, and use a first temperature sensor provided at the center of the bottom wall of the refractory material placement box to detect the temperature of the middle part of the refractory material test block, and use two second temperature sensors to detect the temperature of the two heating plates to calculate the thermal conductivity of the refractory material test block.

9. The method for detecting thermal conductivity of refractory materials according to claim 8, characterized in that: The following formula was used to calculate the thermal conductivity of the refractory test blocks: Wherein, λ is the thermal conductivity, w / m·K; P is the heating power, W; L is the distance between the two heating plates on both sides of the refractory material test block, m; A is the surface area of ​​the two sides of the refractory material test block and the two heating plates, m 2 ; T2-T1 is the temperature gradient difference from both sides to the center of the refractory test block, that is, the temperature difference between the temperatures detected by the first temperature sensor and the second temperature sensor, usually expressed in K.

10. The method for detecting thermal conductivity of refractory materials according to claim 8, characterized in that: When using the two heating plates to heat both sides of the refractory material test block to a preset temperature, first heat both sides of the refractory material test block to a temperature 50-100°C lower than the preset temperature at a heating rate of 5-10°C / min, and then continue to heat the refractory material test block to the preset temperature at a heating rate of 3-5°C / min.

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