Production process of low-temperature sintered foamed ceramic

A technology of foamed ceramics and production technology, which is applied in the production of ceramic materials, ceramic products, applications, etc., can solve the problems of affecting the strength of products and the easy occurrence of through pores, etc., and achieve low production costs, high strength, and low firing temperature. Effect

Inactive Publication Date: 2020-11-17
GUANGDONG KITO CERAMICS GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is also proposed to reduce the firing temperature of the green body to make the liquid phase appear earlier, but the molten liquid phase that appears too early will easily appear through pores, which will affect the strength of the product

Method used

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  • Production process of low-temperature sintered foamed ceramic
  • Production process of low-temperature sintered foamed ceramic
  • Production process of low-temperature sintered foamed ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-10

[0041] With reference to the following Table 2, the formula table of the following Table 2 Examples 1-10, various components are calculated in parts by mass.

[0042] Table 2

[0043]

[0044] Weigh various raw materials according to the ratio of mass parts in Table 2, add water ball mill after initial mixing, the ball milling time is 20-24 hours, after homogenizing the slurry, pump it into the spray drying tower for spray granulation, and obtain powder particles . Of course, it needs to be explained here that wet ball milling and subsequent spray drying are commonly used raw material processing methods in the ceramic production process. In addition to this method, there are also dry granulation methods. This step only needs to mix various raw materials evenly , to obtain a powder with a uniform texture.

[0045]Spread and spread the powder obtained in step 1 in the refractory kiln furniture. Usually, the thickness of the powder is to fill 1 / 3 or less of the kiln furnitur...

Embodiment 1

[0050] The shape of the pores of the foamed ceramics obtained in Example 1 and Example 2 is irregular, with a small amount of penetrating pores, large pores in some parts, and serious internal black spots. The black heart is serious; the amount of glass flux used in these two embodiments is small, so the molten liquid phase produced is also relatively small, and some of the foaming gas generated by silicon carbide is not enclosed in the molten liquid phase, which results in penetrating pores. , there are a small amount of large pores locally, which makes the strength not high and the water absorption rate is also relatively large.

Embodiment 3

[0051] The amount of silicon carbide in Example 3 and Example 4 is reduced, so the situation of internal black centers is weakened, and with the increase of the amount of polishing slag, the silicon carbide in the polishing slag also has a foaming effect, which makes the bulk density not increase with the carbonization The amount of silicon increases due to the decrease of large pores and penetrating pores that affect the strength, and the compressive strength of the green body is improved.

[0052] Contrasting Examples 1-5, it can be concluded that using the mixture of polishing slag waste brick powder as the main ingredient is better than a single component, and the consumption of blowing agent silicon carbide should not be excessive, otherwise it will play a bad effect. Based on the quality of the main material, an additional 3 parts is added to basically reach the limit value of foamed ceramic production.

[0053] When firing foamed ceramics at a lower temperature, the exh...

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Abstract

The invention relates to the field of ceramic production, in particular to a production process of low-temperature sintered foamed ceramic. The process comprises the following steps: step 1, with ceramic clinker, polishing slag, waste glass and high-alumina clay as main materials and silicon carbide as a foaming agent, uniformly mixing the main materials with the foaming agent; step 2, molding theraw materials mixed in the step 1, carrying out high-temperature sintering at a sintering temperature of 1050-1100 DEG C, and conducting cooling to obtain a foamed ceramic blank; and step 3, subjecting a workblank obtained in the step 2 to cutting and polishing to obtain a needed shape. In the step 1, the main materials comprise the following components in parts by weight: 0-85 parts of the ceramic clinker, 0-85 parts of the polishing slag, 10-40 parts of the waste glass, and 5-15 parts of the high-alumina clay. In the step 1, 0.2-3 parts by mass of the foaming agent silicon carbide is used.Compared with the prior art, the process can fully utilize waste materials, is low in energy consumption due to low-temperature sintering, and is beneficial for popularization and application of foamed ceramic products.

Description

technical field [0001] The invention relates to the field of ceramic production, in particular to a production process of low-temperature sintered foamed ceramics. Background technique [0002] Foamed ceramics are lightweight ceramic materials with closed cells. Foamed ceramics has the advantages of light weight, heat insulation, and sound insulation, and is an excellent building material. Foamed ceramics have low requirements on the grade of raw materials, and can use a large amount of inorganic waste such as sludge and slag. It is a green and environmentally friendly building material. At present, the industrial production of foamed ceramics uses the sintering and foaming process, that is, adding a foaming agent that can release gas during high-temperature sintering to the raw materials, and the molten liquid phase generated during high-temperature sintering wraps the gas generated by the foaming agent. After cooling, closed pores are formed in the green body. Silicon c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B33/16C04B33/132C04B33/13C04B33/04
CPCC04B38/02C04B33/16C04B33/132C04B33/13C04B33/04C04B2235/3217C04B2235/3418C04B2235/77C04B2235/96C04B2235/6562C04B2235/6567C04B2235/661Y02P40/60
Inventor 张国涛邓波杨景琪江峰黄辛辰
Owner GUANGDONG KITO CERAMICS GROUP CO LTD
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