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Tunnel kiln firing system of foamed ceramic light-weight board

A technology for foaming ceramics and tunnel kilns, which is applied in the production of ceramic materials, ceramic products, applications, etc., can solve the problems of poor overall product uniformity, difficult oxidation of the formulation system, long firing cycle, etc., to avoid single-layer stacking. The effect of sintering, shortening the sintering cycle, and reducing the production space

Inactive Publication Date: 2018-11-16
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 firing system of foamed ceramic light-weight board
  • Tunnel kiln firing system of foamed ceramic light-weight board
  • Tunnel kiln firing system of foamed ceramic light-weight board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] (1) Formula: tile polishing waste 95.5%, foaming agent 0.5%, manganese dioxide stabilizer 4%.

[0096] (2) Preparation method:

[0097] The raw materials are mixed according to the proportion, and the powder is obtained through ball milling;

[0098] The powder is distributed on the kiln car through the feeding line, and then the kiln car is pushed into the tunnel kiln for three-layer stacking firing treatment to obtain foamed ceramic light boards. The firing method is as follows: (a) heating to 800°C , and kept at 800°C for 20min, wherein, the heating rate from 0°C to 400°C was 10°C / min, and the heating rate from 400°C to 800°C was 3°C / min; (b) heating to 1150°C, And keep it at the highest temperature for 40min, wherein, the heating rate from 800°C to 1150°C is 3°C / min; (c) slowly cool down, the cooling rate from 1150°C to 600°C is 3°C / min, The cooling rate for cooling down to 50°C is 1°C / min;

[0099]Finally, the foamed ceramic light board is unloaded through the u...

Embodiment 2

[0101] (1) Formula: tile polishing waste 90%, clay 1%, feldspar 8.8%, foaming agent 0.1%, stabilizer 0.1%.

[0102] (2) Preparation method:

[0103] The raw materials are mixed according to the proportion, and the powder is obtained through ball milling;

[0104] The powder is distributed on the kiln car through the feeding line, and then the kiln car is pushed into the tunnel kiln for three-layer stacking firing treatment to obtain foamed ceramic light boards. The firing method is as follows: (a) heating to 820 °C , and kept at 820°C for 15 minutes, wherein, the heating rate from 0°C to 400°C was 15°C / min, and the heating rate from 400°C to 820°C was 5°C / min; (b) heating to 1170°C, And keep it at the highest temperature for 30min, wherein, the heating rate from 820°C to 1170°C is 4°C / min; (c) slow down the temperature, the cooling rate from 1170°C to 600°C is 4°C / min, The cooling rate for cooling down to 50°C is 2°C / min;

[0105] Finally, the foamed ceramic light board is ...

Embodiment 3

[0107] (1) Formula: tile polishing waste 92%, clay 5%, feldspar 2%, foaming agent 0.2%, stabilizer 0.8%.

[0108] (2) Preparation method:

[0109] The raw materials are mixed according to the proportion, and the powder is obtained through ball milling;

[0110] The powder is distributed on the kiln car through the feeding line, and then the kiln car is pushed into the tunnel kiln for three-layer stacking firing treatment to obtain foamed ceramic light boards. The firing method is as follows: (a) heating to 830°C , and kept at 830°C for 25min, wherein, the heating rate from 0°C to 400°C was 15°C / min, and the heating rate from 400°C to 830°C was 5°C / min; (b) heating to 1180°C, And keep warm at the highest temperature for 0-60min, wherein, the heating rate from 830°C to 1180°C is 5°C / min; (c) slow down the temperature, the cooling rate from 1180°C to 600°C is 5°C / min, by The cooling rate from 600°C to 50°C is 2°C / min;

[0111] Finally, the foamed ceramic light board is unloade...

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Abstract

The invention discloses a tunnel kiln firing system of a foamed ceramic light-weight board. The tunnel kiln firing system comprises a feeding line, a tunnel kiln and a discharging line, wherein a kilncar comprises a support, the support is provided with a sagger, the sagger comprises a base plate, a surrounding plate and high-temperature-resistant paper, the surrounding plate is erected on the periphery of the base plate, and the base plate and the surrounding plate are both provided with the high-temperature-resistant paper. The feeding line comprises a cleaning unit for cleaning the base plate and the surrounding plate, a first laying unit for laying the high-temperature-resistant paper on the base plate, a surrounding plate erection unit for erecting the surrounding plate on the base plate, a second laying unit for laying the high-temperature-resistant paper on the surrounding plate, a material distribution unit for distributing a material on the sagger formed by the base plate, the surrounding plate and the high-temperature-resistant paper and a conveying unit for delivering the kiln car completing material distribution to the tunnel kiln. The tunnel kiln firing system achieves multi-layer firing, high automatic degree, high production efficiency and cost and space saving.

Description

Technical field [0001] The invention relates to the technical field of ceramic plates, and in particular to a tunnel kiln firing system for foamed ceramic lightweight plates. Background technique [0002] The matrix material used in foamed ceramics comes 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, piled up or landfilled at will, they will pollute the environment and also Resources were wasted. [0003] This foamed ceramic product has gradually begun to be used across the country due to its advantages of light weight, high strength, fire resistance, earthquake resistance, heat insulation, sound insulation, strong combination, easy handling, and wide application. And because its raw materials are solid waste such as cinder, tile polishing waste, and slag, it has positive social significance in terms of full utilization of resources and environmental protection. [0004]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B9/02C04B33/13C04B33/132C04B38/02C04B38/06
CPCC04B33/1305C04B33/131C04B33/1321C04B33/1324C04B38/02C04B38/067C04B2235/77C04B2235/96C04B2235/9607F27B9/021Y02P40/60
Inventor 林智欧阳慧
Owner KEDA INDUSTRIAL GROUP CO LTD
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