A sintering furnace for the production of zirconia fiberboard

Abstract

This utility model relates to zirconia fiberboard production equipment and sintering technology, specifically to a sintering furnace for zirconia fiberboard production. The sintering furnace includes a furnace chamber, an inner lining, and modular honeycomb heating units. The furnace chamber lining is composed of zirconia fiberboard, and the side walls and bottom of the furnace have a main frame for mounting the modular honeycomb heating units. Each heating unit includes a honeycomb porous ceramic skeleton, heating elements, and a temperature control module, which can independently control the temperature and dynamically compensate for thermal field deviations. The heating units are detachable via a base, facilitating flexible assembly and maintenance. This utility model significantly improves the temperature uniformity within the furnace through distributed heating and zoned temperature control technology, effectively solving the problem of lateral and longitudinal temperature differences in traditional sintering equipment, improving product quality stability and process adaptability. It has advantages such as energy saving, safety, and strong scalability, and is suitable for high-efficiency sintering applications of high-temperature ceramic materials.

Description

Technical Field

[0001] This utility model relates to equipment for producing zirconia fiberboard and the field of sintering technology, specifically to a sintering furnace for producing zirconia fiberboard. Background Technology

[0002] The information disclosed in the background section of this utility model is intended only to enhance the understanding of the overall background of this utility model, and is not necessarily to be regarded as an admission or in any way implying that the information constitutes prior art known to those skilled in the art.

[0003] Zirconia (ZrO2) fiberboard is widely used in thermal insulation components for extreme high-temperature environments (>1500℃) due to its excellent high-temperature stability, low thermal conductivity, and good corrosion resistance. However, in practical applications, current equipment used for sintering zirconia fiberboard still suffers from uneven temperature distribution. Traditional resistance furnaces employ single-point temperature control, resulting in transverse temperature differences of up to 48℃ and significant longitudinal delamination, with temperature differences between the upper and lower surfaces exceeding 35℃. This leads to large differences in grain size and high density fluctuations, ultimately affecting the overall mechanical properties.

[0004] Although the industry has tried various improvement solutions, such as multi-temperature zone control, microwave-assisted sintering, and hot isostatic pressing cooling, they all have problems such as narrow applicability, insufficient penetration depth, and high equipment costs, and have failed to fundamentally solve the above-mentioned technical bottlenecks.

[0005] Based on this, this utility model proposes a novel sintering furnace device with an integrated modular honeycomb heating unit, aiming to achieve an efficient, stable, and controllable sintering process for zirconia fiberboard. Utility Model Content

[0006] To address the aforementioned technical problems, this utility model proposes a sintering furnace for the production of zirconia fiberboard, aiming to solve the problems of uneven temperature field distribution, low temperature control accuracy, and unstable product performance in the production process of zirconia fiberboard using existing sintering furnaces.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A sintering furnace for the production of zirconia fiberboard includes a furnace chamber and a furnace chamber lining, wherein the furnace chamber lining is made of zirconia fiberboard; the furnace chamber lining includes a lining furnace top, lining furnace sidewalls and lining furnace bottom.

[0009] The inner lining furnace top and inner lining sidewalls are provided with a main frame, and a number of modular honeycomb heating units are distributed and installed on the main frame.

[0010] Preferably, the modular honeycomb heating unit includes a honeycomb porous ceramic framework, and corresponding heating elements are installed inside the honeycomb porous ceramic framework.

[0011] Preferably, the heating element is an electric heating coil or a resistance film.

[0012] Preferably, a honeycomb installation cavity for installing the heating element is provided inside the honeycomb porous ceramic framework.

[0013] Preferably, the modular honeycomb heating unit further includes a base;

[0014] The base includes a connecting portion for detachably connecting with the honeycomb porous ceramic framework and a fixing portion for detachably connecting with the main body frame.

[0015] Preferably, the fixing portion includes a shrinking portion and a fixing seat;

[0016] The maximum outer diameter of the fixing seat is less than or equal to the vertical projection of the honeycomb porous ceramic framework;

[0017] The shrinking portion is used to provide an installation space.

[0018] Preferably, the inner lining furnace top is arranged in a "V" shape, and the modular honeycomb heating units on both sides of the inner lining furnace top are installed in a cross manner at an angle of 30° to 60°.

[0019] The utility model has at least the following beneficial effects:

[0020] In the utility model, each heating unit adopts a honeycomb porous ceramic framework structure, with heating elements arranged inside and an independent temperature control module integrated. This design combining distributed heating and zoned temperature control can achieve precise temperature control of different areas inside the furnace chamber, effectively solving the problems of horizontal and vertical temperature differences caused by traditional single-point temperature control.

[0021] In the utility model, the modular honeycomb heating units are detachably installed on the main body frame through fixing parts, and can be flexibly assembled and combined according to different product specifications and sintering process requirements. The adaptability of the equipment to different production tasks is improved, and it can be adapted to zirconia fiber boards with different thicknesses, shapes and sizes.

[0022] Due to the adoption of the modular structure, when a certain heating unit fails, it can be replaced separately without affecting the operation of the overall system, reducing the maintenance cost and downtime. Description of the Drawings

[0023] Figure 1 is the overall three-dimensional structure schematic diagram of the utility model;

[0024] Figure 2 It should be noted that in the translation of the description about the shape of the inner lining furnace top in item , the original text seems to have an error. It is guessed that it should be "V" shape instead of "人" shape. The translation is adjusted accordingly. If there is any other special requirement or correction, please feel free to let me know.This is a schematic diagram of the disassembled structure of a modular honeycomb heating unit.

[0025] The reference numerals used in the attached figures are as follows:

[0026] 100. Inner lining of the furnace top; 200. Inner lining of the side wall; 300. Inner lining of the furnace bottom; 400. Main frame; 500. Modular honeycomb heating unit; 510. Honeycomb porous ceramic skeleton; 511. Honeycomb mounting cavity; 520. Base; 521. Connecting part; 522. Fixing part; 530. Heating element. Detailed Implementation

[0027] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] Figures 1 to 2 A sintering furnace for the production of zirconia fiberboard is disclosed, comprising a furnace chamber and a furnace chamber lining, wherein the furnace chamber lining is made of zirconia fiberboard; the furnace chamber lining comprises a lining furnace top 100, an lining furnace sidewall 200, and an lining furnace bottom 300.

[0029] The inner lining furnace top 100 and inner lining sidewall 200 are provided with a main frame 400. Several modular honeycomb heating units 500 are distributed and installed on the main frame 400. The modular honeycomb heating units 500 are detachably installed and fixed on the main frame 400 by corresponding fasteners, so that the modular honeycomb heating units 500 can be assembled according to actual needs.

[0030] The specific structure of the modular honeycomb heating unit 500 is as follows: it includes a honeycomb porous ceramic skeleton 510, within which a honeycomb mounting cavity 511 for mounting the heating element 530 is provided. The shape of the honeycomb porous ceramic skeleton 510 can be polygonal or circular; in this embodiment, it is a regular hexagon, designed for ease of assembly. This allows the sintering furnace to employ a combination of distributed heating and zoned heating in the production of zirconia fiberboard, solving the fundamental problem of uneven temperature field compared to traditional single-point temperature-controlled resistance furnaces.

[0031] The honeycomb porous ceramic skeleton 510 is equipped with a corresponding heating element 530, which is an electric heating coil or a resistance film. In subsequent expansion and upgrade applications, each heating element 530 can also be equipped with a corresponding temperature control module. The temperature control module includes a corresponding thermocouple and a lower-level controller. In this way, the corresponding temperature data can be collected in real time and transmitted to the central controller. The power of each unit can also be dynamically adjusted to compensate for thermal field deviations and realize closed-loop control. This avoids problems such as large differences in grain size and high density fluctuations caused by local overheating or cooling, thereby improving the consistency of the mechanical properties of the product.

[0032] In another specific embodiment, for the convenience of installing the heating element 530, the modular honeycomb heating unit 500 further includes a base 520. The honeycomb porous ceramic framework 510 and the base 520 are both made of high-temperature resistant materials, specifically ceramic materials.

[0033] The functions of the base 520 are as follows: on the one hand, it is used to connect the honeycomb porous ceramic framework 510 and the main framework 400; on the other hand, it is used for limit installation of the heating element 530. The specific structure of the base 520 is as follows: it includes a connecting part 521 for detachably connecting with the honeycomb porous ceramic framework 510 and a fixing part 522 for detachably connecting with the main framework 400. The specific connection method can adopt detachable connection with threaded fasteners.

[0034] The fixing part 522 includes a contraction part and a fixing seat; wherein, the maximum outer diameter of the fixing seat is less than or equal to the vertical projection of the honeycomb porous ceramic framework 510; the purpose is to provide installation space.

[0035] In another specific embodiment, the inner furnace top 100 is arranged in a "V" shape, and the modular honeycomb heating units 500 on both sides of the inner furnace top

[0036] The terms "upper", "lower", "outer side", "inner side", etc. in the specification, claims and above-mentioned drawings of the present utility model, if any, are used to distinguish the relative relationship in position and do not need to be given qualitative definitions. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0037] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sintering furnace for the production of zirconia fiber boards, comprising a furnace chamber and a furnace chamber lining, wherein the furnace chamber lining is made of zirconia fiber boards; the furnace chamber lining includes a lining furnace top, a lining side wall and a lining furnace bottom; and it is characterized in that: The lining furnace top and the lining side wall are provided with a main frame, and a plurality of modular honeycomb heating units are distributed and installed on the main frame.

2. The sintering furnace for the production of zirconia fiber boards according to claim 1, wherein: The modular honeycomb heating unit includes a honeycomb-shaped porous ceramic skeleton, and a corresponding heating element is installed in the honeycomb-shaped porous ceramic skeleton.

3. The sintering furnace for the production of zirconia fiber boards according to claim 2, wherein: The heating element is an electric heating coil or a resistance film.

4. The sintering furnace for the production of zirconia fiber boards according to claim 2, wherein: A honeycomb installation cavity for installing the heating element is provided in the honeycomb-shaped porous ceramic skeleton.

5. The sintering furnace for the production of zirconia fiber boards according to claim 2, wherein: The modular honeycomb heating unit further includes a base; The base includes a connecting portion for detachably connecting with the honeycomb-shaped porous ceramic skeleton and a fixing portion for detachably connecting with the main frame.

6. The sintering furnace for the production of zirconia fiber boards according to claim 5, wherein: The fixing portion includes a contracting portion and a fixing seat; The maximum outer diameter of the fixing seat is less than or equal to the vertical projection of the honeycomb-shaped porous ceramic skeleton; The contracting portion is used to provide an installation space.

7. The sintering furnace for the production of zirconia fiber boards according to any one of claims 1 to 6, wherein: The lining furnace top is arranged in a "human" shape, and the modular honeycomb heating units on both sides of the lining furnace top are installed crosswise at an angle of 30° to 60°.

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