An energy-saving sintering device for infrared reflective pigments
By combining a gradient insulation layer and an infrared reflective coating in the sintering device, along with adjustable heating rods and circulating fans, the problems of heat loss and uneven temperature were solved, achieving high efficiency, energy saving, and high-quality sintering results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU DAOMAN NEW BUILDING MATERIALS TECH CO LTD
- Filing Date
- 2025-07-17
- Publication Date
- 2026-07-03
AI Technical Summary
Existing sintering equipment suffers from severe heat radiation and heat conduction losses during high-temperature heating, leading to increased energy consumption, significant temperature inhomogeneity, unstable product quality, and easy oxidation of components at high temperatures, resulting in high maintenance costs.
By combining a gradient insulation layer and an infrared reflective coating, along with an adjustable heating rod and a circulating fan, a synergistic structure of reflective heat accumulation, forced convection, and gradient insulation is formed, reducing heat loss through radiation and conduction and achieving uniform temperature control.
It significantly improves heat utilization efficiency, controls temperature deviation within ±2℃, enhances product qualification rate and reflectivity stability, and reduces energy consumption and maintenance costs.
Smart Images
Figure CN224455401U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of industrial sintering equipment technology, specifically an energy-saving sintering device for infrared reflective pigments. Background Technology
[0002] Existing sintering equipment suffers from severe heat radiation loss during high-temperature heating: traditional furnace inner walls are mostly made of ordinary refractory materials, with a reflectivity of less than 30% for infrared radiation in the 800-2500nm wavelength band. More than 60% of the heat is lost through radiation from the furnace wall, with nearly half of the energy consumption per furnace cycle used to compensate for radiation loss. Conventional insulation layers are mostly made of single-layer ceramic fibers, with a thermal conductivity of over 0.15W / (m·K) at 1000℃. The outer wall temperature of the furnace often exceeds 80℃, and heat conduction loss accounts for 25%-30% of the total energy consumption. Uneven distribution of heating elements can cause temperature deviations within the furnace to reach ±10℃, requiring extended sintering time to ensure product quality and indirectly increasing energy consumption. Furthermore, the surface of the elements oxidizes rapidly at high temperatures, necessitating replacement every 3-6 months, resulting in high maintenance costs. When producing infrared reflective pigments, traditional equipment suffers from weak thermal reflectivity, leading to uneven heating of pigment particles and fluctuations in the reflectivity of the finished product of 5%-8%, with a pass rate of only about 70%. Although a few equipment attempts to add a reflective layer, they mostly use metal materials such as aluminum foil, which are unsuitable for high-temperature sintering scenarios. Utility Model Content
[0003] The purpose of this invention is to provide an energy-saving sintering device for infrared reflective pigments to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution:
[0005] An energy-saving sintering apparatus for infrared reflective pigments, comprising:
[0006] The furnace body includes a gradient insulation layer on the outer wall of the furnace body. The gradient insulation layer consists of zirconium oxide nanofiber felt, vacuum insulation board and aluminum zinc plate from the inside to the outside. The inner wall of the furnace body is coated with an infrared reflective coating.
[0007] A top cover, wherein a circulating fan is fixedly installed on the inner wall of the top of the top cover;
[0008] Support components, including crucible holder and crucible;
[0009] Heating components, including guide rails and heating rods.
[0010] In a preferred embodiment of this utility model, a base is fixedly installed on the bottom outer wall of the furnace body, a controller is fixedly installed on the outer wall of the aluminum-zinc coated steel plate, and a display screen and operation buttons are fixedly installed on the outer wall of the controller.
[0011] In a preferred embodiment of this utility model, the crucible rack is installed on the inner wall of the bottom of the furnace body, and a crucible is snapped onto the top of the crucible rack. The crucible is used to hold the pigment to be sintered.
[0012] In a preferred embodiment of this utility model, the top cover is inserted and connected to the inner wall of the top of the furnace body, and a handle is fixedly installed on the outer wall of the top of the top cover.
[0013] In a preferred embodiment of this utility model, the top external airflow input end of the circulating fan is provided with a filter element groove, the filter element is fixedly installed on the inner wall of the filter element groove, and the top of the filter element groove is threadedly connected to a breathable cover plate.
[0014] In a preferred embodiment of this utility model, two sets of guide rails are provided, and the two sets of guide rails are symmetrically installed on the inner wall of the bottom of the furnace body, and triangular support plates are fixedly installed on the outer walls on both sides of the guide rails.
[0015] In a preferred embodiment of this utility model, the inner walls on both sides of the guide rail are symmetrically provided with first pin holes, the heating rod is configured as an arc shape, and a slide block is fixedly installed on the outer wall of the rear end of the heating rod, the slide block being slidably connected to the inner wall of the guide rail.
[0016] In a preferred embodiment of this utility model, a second pin hole is provided on the inner wall of the slide block, and a connecting pin is inserted between the first pin hole and the second pin hole to adjust the height of the heating rod.
[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
[0018] 1. The infrared reflective coating and the gradient insulation layer work together to significantly improve the furnace heat utilization rate. Through the adjustable heating rod spacing design and the heat circulation system, the temperature deviation in the furnace is controlled within ±2℃, which improves the pass rate.
[0019] 2. It is compatible with sintering processes ranging from 800 to 1600℃, enabling the production of high-reflectivity infrared pigments as well as the sintering of precision ceramics and special metal powders, making it highly versatile. Attached Figure Description
[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0021] Figure 1 This is a schematic diagram of the main structure of an energy-saving sintering device for infrared reflective pigments.
[0022] Figure 2This is a schematic diagram of the exploded structure of an energy-saving sintering device for infrared reflective pigments.
[0023] Figure 3 This is a schematic diagram of the top cover structure in an energy-saving sintering device for infrared reflective pigments.
[0024] Figure 4 This is a schematic diagram of the supporting component structure in an energy-saving sintering device for infrared reflective pigments.
[0025] Figure 5 This is a schematic diagram of the heating component structure in an energy-saving sintering device for infrared reflective pigments.
[0026] In the diagram: furnace body 100, zirconia nanofiber felt 110, vacuum insulation board 120, aluminized zinc steel plate 130, infrared reflective coating 140, controller 150, display screen 151, operation button 152, base 160, top cover 200, circulating fan 210, filter element tank 211, filter element 212, vent cover 213, handle 230, crucible rack 300, crucible 310, guide rail 400, first pin hole 410, triangular support plate 420, pin 430, heating rod 440, slide 441. Detailed Implementation
[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0028] Example 1: As Figure 1 and 2 ,include:
[0029] The furnace body 100 includes a gradient insulation layer on the outer wall of the furnace body 100. The gradient insulation layer consists of zirconia nanofiber felt 110, vacuum insulation board 120 and aluminum zinc plate 130 from the inside to the outside. The inner wall of the furnace body 100 is coated with an infrared reflective coating 150.
[0030] Top cover 200, with circulating fan 210 fixedly installed on the inner wall of the top of top cover 200;
[0031] The support assembly includes a crucible holder 300 and a crucible 310;
[0032] Heating components, including guide rail 400 and heating rod 440.
[0033] The specific application scenario of this embodiment is as follows: The gradient insulation layer on the outer wall of the furnace body 100, consisting of zirconia nanofiber felt 110, vacuum insulation board 120, and aluminized zinc steel plate 130, blocks heat conduction through low thermal conductivity materials and a vacuum environment. The infrared reflective coating 150 on the inner wall reflects 800-2500nm infrared radiation back into the furnace, reducing radiative heat loss. The circulating fan 210 of the top cover 200 drives the hot airflow to flow in the furnace, so that the heat generated by the heating components and the heating rods 440 on the guide rail 400 is evenly applied to the material in the crucible 310 on the crucible rack 300. This structure improves the heat utilization rate through the synergistic effect of "reflective heat concentration + forced convection + gradient insulation", and is suitable for small and medium-sized infrared pigment batch sintering scenarios that are sensitive to energy consumption. The infrared reflective coating 150 is made of SrTiO3 (La 3+ The mixture (5% doping) and silica sol were mixed at a mass ratio of 7:3, and 0.5% dispersant (sodium hexametaphosphate) was added. The mixture was ball-milled for 2 hours to form a slurry, which was then coated onto the inner wall of the furnace using a high-pressure airless spraying process. After drying at 80°C, the coating was sintered at 1200°C for 3 hours to form a dense coating with a reflectivity of 88%. The thickness of the infrared reflective coating 150 was 0.2-0.4 mm.
[0034] Example 2: Figure 1 and Figure 2 The bottom outer wall of the furnace body 100 is fixedly installed with a base 160, the outer wall of the aluminum-zinc coated steel plate 130 is fixedly installed with a controller 150, and the outer wall of the controller 150 is fixedly installed with a display screen 151 and an operation button 152.
[0035] The specific application scenario of this embodiment is as follows: The base 160 provides stable support for the furnace body 100, preventing internal structural displacement due to vibration during equipment operation. The controller 150 on the outer wall of the aluminized zinc steel plate 130 displays parameters such as furnace temperature and fan speed in real time via the display screen 151, realizing digital control of the sintering process. When the temperature deviation exceeds ±1℃, the controller automatically adjusts the power of the heating rod 440 to ensure process stability. This is suitable for laboratory research and development or high-quality pigment production scenarios requiring precise temperature control.
[0036] Example 3: Figure 2 and Figure 4 The crucible rack 300 is installed on the inner wall of the bottom of the furnace body 100, and the top of the crucible rack 300 is snapped with a crucible 310, which is used to hold the pigment to be sintered.
[0037] The specific application scenario of this embodiment is as follows: the crucible rack 300 fixes the crucible 310 through a snap-fit structure to ensure the stability of the material position during the sintering process and avoid the crucible tilting due to airflow disturbance. The crucible 310 directly carries the pigment to be sintered. The material of the crucible 310 can be corundum, which is resistant to high temperature and has strong chemical stability, and can prevent the pigment from reacting with the container and contaminating the finished product. With the secondary heating of the infrared reflective coating 150, the pigment particles are heated evenly, which is suitable for the standardized sintering of powdered or granular infrared reflective pigments.
[0038] Example 4: Figure 1 and Figure 3 The top cover 200 is connected to the inner wall of the top of the furnace body 100 by insertion. The top outer wall of the top cover 200 is fixedly installed with a handle 230. The top external airflow input end of the circulating fan 210 is provided with a filter element groove 211. The filter element 212 is fixedly installed on the inner wall of the filter element groove 211. The top of the filter element groove 211 is threadedly connected with a breathable cover plate 213.
[0039] The specific application scenario of this embodiment is as follows: the plug-in connection between the top cover 200 and the furnace body 100 enhances the sealing performance and reduces the leakage of hot air; the handle 230 facilitates quick opening and closing of the top cover, improving operational convenience. Inside the filter element groove 211 of the circulating fan 210, the filter element 212 filters the air entering the furnace, preventing impurities from contaminating the pigments at high temperatures. The ventilated cover 213 ensures airflow while preventing external dust from entering. This structure is suitable for scenarios requiring high material purity, and also simplifies the cleaning and maintenance process of the top cover.
[0040] Example 5: Figure 2 and Figure 5 Two sets of guide rails 400 are provided, and the two sets of guide rails 400 are symmetrically installed on the bottom inner wall of the furnace body 100. Triangular support plates 420 are fixedly installed on the outer walls of both sides of the guide rails 400. First pin holes 410 are symmetrically opened on the inner walls of both sides of the guide rails 400. The heating rod 440 is designed as an arc shape. A slide block 441 is fixedly installed on the outer wall of the rear end of the heating rod 440. The slide block 441 is slidably connected to the inner wall of the guide rails 400. A second pin hole is opened on the inner wall of the slide block 441. A pin 430 is inserted between the first pin hole 410 and the second pin hole to adjust the height of the heating rod 440.
[0041] The specific application scenario of this embodiment is as follows: Two sets of symmetrical guide rails 400 provide sliding support for the heating rod 440, and the triangular support plate 420 enhances the stability of the guide rails and prevents deformation at high temperatures. By sliding the slide block 441 within the guide rails 400, the position of the heating rod 440 along the depth direction of the furnace can be adjusted. The first pin hole 410 and the second pin hole cooperate with the pin 430 to achieve a stepped adjustment of the heating rod height. The arc-shaped heating rod 440 can be adapted to the arc-shaped outer wall of the crucible 310, shortening the heating distance and improving the thermal radiation efficiency. This design is suitable for scenarios with different sizes of crucibles or changes in material quantity, flexibly matching diverse heating needs.
[0042] The working principle of this utility model is as follows: When used by those skilled in the art, the furnace body 100 is the core. The infrared reflective coating 150 on the inner wall of the furnace body 100 reflects the 800-2500nm infrared radiation generated by the heating components back into the furnace, reducing radiative heat loss. The zirconium nanofiber felt 110, vacuum insulation board 120, and aluminized zinc steel plate 130 on the outer wall block heat conduction through low thermal conductivity materials and the vacuum environment. Combined with the plug-in sealing structure of the top cover 200, a three-dimensional heat insulation barrier is formed, increasing the heat utilization rate to over 80%. During the heating process, the controller 150 operates via a preset program and button 1. The system is set to 52, with real-time feedback on the display screen 151. The power of the heating rod 440 is adjusted, and automatic calibration is performed when the temperature deviation exceeds ±1℃. The circulating fan 210 of the top cover 200 drives the hot airflow for forced convection. The clean air filtered by the filter element 212 forms a "top air supply - middle heat exchange - bottom return" cycle in the furnace, eliminating temperature gradients. The crucible 310 fixed by the crucible rack 300 places the pigment to be sintered in the uniform heat field area in the center of the furnace. The height-adjustable design of the heating rod 440 ensures that the material receives consistent heat, guaranteeing the temperature uniformity of infrared pigment sintering with a deviation of ≤±1℃, and improving the stability and pass rate of the finished product reflectivity.
[0043] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. An infrared reflective pigment energy-saving sintering device, characterized by, include: The furnace body (100) includes a gradient insulation layer on the outer wall of the furnace body (100), wherein the gradient insulation layer consists of zirconium nanofiber felt (110), vacuum insulation board (120) and aluminum zinc plate (130) from the inside to the outside, and the inner wall of the furnace body (100) is coated with an infrared reflective coating (150). A top cover (200) is provided, wherein a circulating fan (210) is fixedly installed on the inner wall of the top of the top cover (200); The support assembly includes a crucible holder (300) and a crucible (310); The heating assembly includes a guide rail (400) and a heating rod (440).
2. The energy-saving sintering device for infrared reflective pigments according to claim 1, characterized in that The bottom outer wall of the furnace body (100) is fixedly mounted with a base (160), the outer wall of the aluminum-zinc coated steel plate (130) is fixedly mounted with a controller (150), and the outer wall of the controller (150) is fixedly mounted with a display screen (151) and an operation button (152).
3. The energy-saving sintering device for infrared reflective pigments according to claim 1, characterized in that, The crucible rack (300) is installed on the bottom inner wall of the furnace body (100), and the top of the crucible rack (300) is snapped with a crucible (310) for holding pigments to be sintered.
4. The energy-saving sintering device for infrared reflective pigments according to claim 1, characterized in that, The top cover (200) is connected to the inner wall of the top of the furnace body (100) by insertion, and the handle (230) is fixedly installed on the outer wall of the top of the top cover (200).
5. The energy-saving sintering apparatus for infrared reflective pigments according to claim 4, wherein The top external airflow input end of the circulating fan (210) is provided with a filter element groove (211), and a filter element (212) is fixedly installed on the inner wall of the filter element groove (211). The top of the filter element groove (211) is threadedly connected to a breathable cover plate (213).
6. An energy-saving sintering apparatus for an infrared reflective pigment according to claim 1, wherein Two sets of guide rails (400) are provided. The two sets of guide rails (400) are symmetrically installed on the inner wall of the bottom of the furnace body (100). Triangular support plates (420) are fixedly installed on the outer walls on both sides of the guide rails (400).
7. An energy-saving sintering apparatus for an infrared reflective pigment according to claim 6, wherein The inner walls of both sides of the guide rail (400) are symmetrically provided with first pin holes (410). The heating rod (440) is set in an arc shape. The outer wall of the rear end of the heating rod (440) is fixedly installed with a slide (441). The slide (441) is slidably connected to the inner wall of the guide rail (400).
8. An energy-saving sintering apparatus for an infrared reflective pigment according to claim 7, wherein The inner wall of the slide (441) is provided with a second pin hole, and a pin (430) is inserted between the first pin hole (410) and the second pin hole to adjust the height of the heating rod (440).