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Tunnel kiln superposition sintering method for foamed ceramic lightweight boards

A technology of foamed ceramics and tunnel kiln, which is applied in the production of ceramic materials, ceramic products, and applications. It can solve the problems of poor overall product uniformity, difficult oxidation of the formula system, and long firing cycle, so as to reduce the oxidation reaction stage. Time, excellent quality, and reduced floor space

Inactive Publication Date: 2018-12-14
KEDA INDUSTRIAL GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the existing foamed bricks are relatively thick and the formula system is difficult to oxidize, the formula system of the foamed ceramics determines that it must be fired in a tunnel kiln. The firing cycle of the tunnel kiln is generally 24-26 hours, and the firing cycle is long. , higher temperature
[0005] And, if figure 1 As shown, the foamed ceramic plate made by the prior art has multi-layer pores formed inside
During the foaming process, due to the long foaming time and the influence of gravity, the pores in the lower layer will be flattened, making the overall uniformity of the product poor
[0006] In addition, the existing tunnel kiln firing is single-layer stack firing, basically manual operation, requiring a lot of manpower, low efficiency and high cost

Method used

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  • Tunnel kiln superposition sintering method for foamed ceramic lightweight boards
  • Tunnel kiln superposition sintering method for foamed ceramic lightweight boards
  • Tunnel kiln superposition sintering method for foamed ceramic lightweight boards

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] (1) Formula: tile polishing waste 95.5%, foaming agent 0.5%, manganese dioxide stabilizer 4%.

[0073] (2) Preparation method:

[0074] The raw materials are mixed according to the proportion, and the powder is obtained through ball milling;

[0075] Distributing the powder on the kiln car, wherein the kiln car includes a support, and the support is provided with a three-layer sagger, and the sagger is used for the distribution of the powder;

[0076] Push the kiln car into the tunnel kiln for three-layer superposition firing treatment. The firing method is as follows:

[0077] (a) Raise the temperature to 800°C and keep it at 800°C for 20 minutes, wherein the heating rate from 0°C to 400°C is 10°C / min, and the heating rate from 400°C to 800°C is 3°C / min;

[0078] (b) Raise the temperature to 1150°C and keep it at the highest temperature for 40 minutes, wherein the heating rate from 800°C to 1150°C is 3°C / min;

[0079] (c) Slowly lower the temperature, the cooling ra...

Embodiment 2

[0081] (1) Formula: tile polishing waste 90%, clay 1%, feldspar 8.8%, foaming agent 0.1%, stabilizer 0.1%.

[0082] (2) Preparation method:

[0083] The raw materials are mixed according to the proportion, and the powder is obtained through ball milling;

[0084] Distributing the powder on the kiln car, wherein the kiln car includes a support, and the support is provided with a three-layer sagger, and the sagger is used for the distribution of the powder;

[0085] Push the kiln car into the tunnel kiln for three-layer superposition firing treatment. The firing method is as follows:

[0086] (a) Raise the temperature to 820°C and keep it at 820°C for 15 minutes, wherein the heating rate from 0°C to 400°C is 15°C / min, and the heating rate from 400°C to 820°C is 5°C / min;

[0087] (b) Raise the temperature to 1170°C and keep it at the highest temperature for 30 minutes, wherein the heating rate from 820°C to 1170°C is 4°C / min;

[0088] (c) Slowly lower the temperature, the cool...

Embodiment 3

[0090] (1) Formula: tile polishing waste 92%, clay 5%, feldspar 2%, foaming agent 0.2%, stabilizer 0.8%.

[0091] (2) Preparation method:

[0092] The raw materials are mixed according to the proportion, and the powder is obtained through ball milling;

[0093] Distributing the powder on the kiln car, wherein the kiln car includes a support, and the support is provided with a three-layer sagger, and the sagger is used for the distribution of the powder;

[0094] Push the kiln car into the tunnel kiln for three-layer superposition firing treatment. The firing method is as follows:

[0095] (a) Raise the temperature to 830°C and keep it at 830°C for 25 minutes, wherein the heating rate from 0°C to 400°C is 15°C / min, and the heating rate from 400°C to 830°C is 5°C / min;

[0096] (b) Raise the temperature to 1180°C, and keep it at the highest temperature for 0-60min, wherein, the heating rate from 830°C to 1180°C is 5°C / min;

[0097] (c) Slowly lower the temperature, the cooling...

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Abstract

The invention discloses a tunnel kiln superposition sintering method for foamed ceramic lightweight boards. The method comprises the following steps: (1) mixing raw materials according to a ratio, ball milling, and performing spray drying, wherein the raw materials comprise ceramic tile polished waste residues, clay, feldspar, a foaming agent and a stabilizer, and the stabilizer is manganese dioxide; (2) distributing powder on a kiln car, wherein the kiln car comprises brackets, at least three layers of saggers are arranged on the brackets, and the sagger is used for distribution molding of the powder; (3) pushing the kiln car into a tunnel kiln for performing multilayer superposition sintering treatment, wherein the firing temperature is 1150-1220 DEG C, and the firing cycle is 15-24 hours. With the adoption of the method disclosed by the invention, low-temperature fast firing is realized, the fired foamed ceramic lightweight boards are arranged on the same section, the air holes do not have any difference from top to bottom, and the bubble uniformity is high.

Description

technical field [0001] The invention relates to the technical field of ceramic plates, in particular to a tunnel kiln stack firing method for foamed ceramic light plates. Background technique [0002] The matrix materials used in foamed ceramics come from wastes such as ceramic factory waste and industrial waste (tile polishing waste or cinder or stone waste, etc.). If these wastes are not treated, they will be piled up or landfilled randomly. Waste of resources. [0003] This foamed ceramic product has gradually begun to be used nationwide due to its advantages of light weight, high strength, fire prevention, earthquake resistance, heat insulation, sound insulation, strong combination, easy handling, and wide application. And because the raw materials are solid wastes such as coal slag, tile polishing waste, slag, etc., it has positive social significance in terms of full utilization of resources and environmental protection. [0004] The formula system of the existing fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/13C04B33/32C04B38/02
CPCC04B33/131C04B33/1324C04B33/32C04B35/63C04B38/02C04B2235/3463C04B2235/349C04B2235/77C04B2235/96C04B2235/9607Y02P40/60
Inventor 林智
Owner KEDA INDUSTRIAL GROUP CO LTD
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