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Foam ceramic and preparation method thereof

A technology of foamed ceramics and foamed plastics, which is applied in the production of ceramic products, ceramic materials, clay products, etc., can solve the problems of poor mechanical properties, easy to cause fire, poor flame retardancy, etc., and achieve low cost, good economic benefits and social benefits. Benefits, the effect of reducing energy consumption

Pending Publication Date: 2019-08-06
广西中添新型材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At the same time, for wall materials with thermal insulation function, polystyrene foam and polyurethane foam have excellent thermal insulation performance, but their flame retardancy is poor, it is easy to cause fire, and it will produce toxic gas when burning
Foamed cement products are light in weight, low in thermal conductivity, good in thermal insulation, and good in flame retardancy, but their strength is low and their mechanical properties are poor. Long-term use also poses safety hazards.

Method used

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  • Foam ceramic and preparation method thereof
  • Foam ceramic and preparation method thereof
  • Foam ceramic and preparation method thereof

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preparation example Construction

[0034] The present invention also provides the preparation method of the ceramic foam described in the above technical scheme, comprising the following steps:

[0035] Mix semi-coke, red mud, feldspar, dispersant and water to obtain ceramic slurry;

[0036] After the polyurethane foam is fully soaked in the ceramic slurry, it is dried and sintered in sequence to obtain foam ceramics.

[0037] In the present invention, semi-coke, red mud, feldspar, dispersant and water are mixed to obtain a ceramic slurry; in the present invention, the particle diameters of the semi-coke, red mud and feldspar are independently preferably ≥ 200 mesh.

[0038] In the present invention, the mass ratio of the total mass of the semi-coke, red mud and feldspar to water is preferably 100:(10-25), more preferably 100:(15-20).

[0039]In the present invention, the mixing is preferably firstly mixing semi-coke, red mud and feldspar, and then mixing the obtained mixture, dispersant and water to obtain ce...

Embodiment 1

[0047] Mix 70g semi-coke, 20g red mud and 7g feldspar and ball mill for 2 hours, pass through a 200-mesh sieve to obtain ceramic powder;

[0048] Mix the above ceramic powder, 3g dispersant and 19.4g water, and stir for 30s to obtain ceramic slurry;

[0049] At 50°C, soak 20PPI flexible polyurethane foam in 15% sodium hydroxide aqueous solution for 3 hours, rub it repeatedly, wash it with water, and dry it in the sun;

[0050] Put the pretreated 20PPI flexible polyurethane foam into the above-mentioned ceramic slurry, squeeze out the excess slurry after fully soaking the slurry, dry it at 110°C for 2 hours, and then sinter it (at a heating rate of 1.5°C / min from the chamber After the temperature rises to 600°C, the temperature rises to 1120°C at a rate of 2.5°C / min, and is kept for 1.5h), and naturally cooled to obtain foamed ceramics (bulk density 580kg / m 3 , the porosity is 62%, and the compressive strength is 8.5MPa).

Embodiment 2

[0052] Mix 65g semi-coke, 25g red mud and 7g feldspar and ball mill for 2 hours, pass through a 200-mesh sieve to obtain ceramic powder;

[0053] Mix the above ceramic powder, 3g dispersant and 19.4g water, and stir for 30s to obtain ceramic slurry;

[0054] At 50°C, soak 20PPI flexible polyurethane foam in 15% sodium hydroxide aqueous solution for 3 hours, rub it repeatedly, wash it with water, and dry it in the sun;

[0055] Put the pretreated 20PPI flexible polyurethane foam into the above-mentioned ceramic slurry, squeeze out the excess slurry after fully soaking the slurry, dry it at 110°C for 2 hours, and then sinter it (at a heating rate of 1.5°C / min from the chamber After the temperature rises to 600°C, the temperature rises to 1180°C at a rate of 2.5°C / min, and is kept for 2 hours), and naturally cooled to obtain foamed ceramics (bulk density 548kg / m 3 , the porosity is 65%, and the compressive strength is 7.6MPa).

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Abstract

The invention relates to the technical field of solid waste utilization, in particular to foam ceramic and a preparation method thereof. The foam ceramic is prepared from following raw materials, by weight, 50-70 parts of semi-coke, 20-40 parts of red mud, 3-15 parts of feldspar, and 2-10 parts of a dispersing agent. The semi-coke and the red mud are adopted as raw materials, so that the semi-cokeand the red mud are fully utilized, and resource utilization of waste is realized. According to embodiments, the foam ceramic has a bulk density of 300-700 kg / m<3>, a porosity of 50-80%, and a compressive strength of 7-10 MPa. The preparation method has the advantages of low cost, easy operation, low energy consumption and environmental protection, and is beneficial to industrial production.

Description

technical field [0001] The invention relates to the technical field of solid waste utilization, in particular to a foam ceramic and a preparation method thereof. Background technique [0002] The long-term storage of industrial waste residues not only takes up a lot of land, but also causes serious pollution and harm to water systems and the atmosphere. For example, oil shale is an important unconventional oil and gas resource. Due to its low oil content and large ash content, it will produce a large amount of oil shale semi-coke during the process of extracting shale oil, which will cause serious damage. Resource and environmental issues; red mud is used as solid waste during alumina production, and its discharge is increasing with the increase of alumina production, which also causes more and more serious environmental problems. [0003] At present, the utilization rate of semi-coke and red mud is very low, and the main treatment method is to stack and shelve, which not o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B33/132
CPCC04B33/132C04B33/1322C04B33/1328C04B38/0615C04B2235/3463C04B2235/6562C04B2235/6567C04B2235/77C04B2235/96C04B38/0074C04B38/0067Y02P40/60
Inventor 黄接高徐晓磊
Owner 广西中添新型材料有限公司
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