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Roller way kiln firing method for lightweight foamed ceramic plates

A technology of foamed ceramics and roller 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 to reduce oxidation reactions. Stage time, shortened firing cycle, excellent quality effect

Inactive Publication Date: 2018-10-19
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 about 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

Method used

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  • Roller way kiln firing method for lightweight foamed ceramic plates
  • Roller way kiln firing method for lightweight foamed ceramic plates
  • Roller way kiln firing method for lightweight foamed ceramic plates

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preparation example Construction

[0066] Correspondingly, such as image 3 As shown, the present invention provides a kind of preparation method of foamed ceramic light board, comprising:

[0067] S101, mixing the raw materials according to the proportion, and ball milling to make powder;

[0068] The ball milling can be wet milling or dry milling. The wet milling process includes: adding 30-40% water to the raw material, putting it into a ball mill for ball milling, milling until the residue on a 250-mesh sieve is less than 1%, and then passing through a spray tower to mill powder to obtain a water content of 5-40%. 10% powder.

[0069] S102, distributing the powder to obtain a green body;

[0070] S103, firing the green body through a roller kiln or a tunnel kiln to obtain a semi-finished product;

[0071] S104, cutting and grinding the semi-product to obtain a finished product.

[0072] After firing, it is necessary to grind the upper and lower surfaces of the green body and cut the edges.

[0073] Th...

Embodiment 1

[0079] (1) Formula: tile polishing waste 95.5%, foaming agent 0.5%, manganese dioxide stabilizer 4%.

[0080] (2) Preparation method:

[0081] The above raw materials are mixed according to the proportion, transported to the ball mill for ball milling, and sieved to a 250-mesh sieve with a residue of less than 1%, and then through the slurry storage tank and transfer tank to the spray tower for spray granulation, and the obtained powder The material is passed through the feeding cart and enters the roller kiln for firing. The firing method is as follows:

[0082] (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;

[0083] (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;

[0084] (c) Slowly lower the temperature, the cooling rate from 1150°C to 600°C...

Embodiment 2

[0087] (1) Formula: tile polishing waste 90%, clay 1%, feldspar 8.8%, foaming agent 0.1%, manganese dioxide stabilizer 0.1%.

[0088] (2) Preparation method:

[0089] The above raw materials are mixed according to the proportion, transported to the ball mill for ball milling, and sieved to a 250-mesh sieve with a residue of less than 1%, and then through the slurry storage tank and transfer tank to the spray tower for spray granulation, and the obtained powder The material is passed through the feeding cart and enters the roller kiln for firing. The firing method is as follows:

[0090] (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;

[0091] (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;

[0092] (c) Slowly lower the temperature, the cooling r...

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Abstract

The invention discloses a roller way kiln firing method for lightweight foamed ceramic plates; the method comprises the steps: (1) heating up to T1 of 800-900 DEG C, and holding for 0-30 min at T1, wherein the heating rate of heating from 0 DEG C to 400 DEG C is 10-20 DEG C / min, and the heating rate of heating from 400 DEG C to T1 is 1-8 DEG C / min; (2) heating up to T2 of 1150-1220 DEG C, and holding for 0-60 min at the highest temperature, wherein the heating rate of heating from T1 to T2 is 1-8 DEG C / min; and (3) slowly cooling, wherein the cooling rate of cooling from T2 to 600 DEG C is 3-9DEG C / min, and the cooling rate of cooling from 600 DEG C to 50 DEG C is 1-4 DEG C / min. By adopting of the method, low temperature fast firing is realized, and the lightweight foamed ceramic plates obtained by firing have no difference in air holes from top to bottom in same cross-sections, and have high bubble uniformity.

Description

technical field [0001] The invention relates to the technical field of ceramic plates, in particular to a method for firing foamed ceramic light plates in a roller kiln. 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 existing foamed ...

Claims

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Application Information

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IPC IPC(8): C04B33/32C04B33/132C04B33/13C04B38/02C04B38/06
CPCC04B33/1305C04B33/131C04B33/1321C04B33/1324C04B33/32C04B38/02C04B38/067C04B2235/6567C04B2235/6565C04B2235/6562C04B2235/9607C04B2235/96C04B2235/77C04B2235/3267C04B2235/3463Y02P40/60
Inventor 林智欧阳慧
Owner KEDA INDUSTRIAL GROUP CO LTD
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