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Lightweight foamed ceramics and preparation method thereof

A technology of lightweight foam and ceramics, which is applied in the field of lightweight foam ceramics and its preparation, and lightweight foam ceramics. It can solve the problems of high sintering temperature, long holding time, and difficulty in production, and achieve low firing temperature and high utilization rate. High, resource-saving effect

Active Publication Date: 2012-12-26
GANSU WANTE TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"In this invention, the sintering temperature is high (1300°C~1450°C), the holding time is long (10~16h), the energy consumption is large, and calcium fluoride, which is easy to corrode equipment, is used as raw material, which is not easy to produce

Method used

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  • Lightweight foamed ceramics and preparation method thereof
  • Lightweight foamed ceramics and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Take 20g of phosphate tailings, 8g of silt, 12g of feldspar, 7g of shale, 5g of kaolin, 7g of yellow sand, 40.4g of water, and 0.6g of sodium tripolyphosphate and put them into a light ball mill and ball mill and mix for 15 hours to obtain a uniformly mixed raw meal; take Rosin soap 4g, sodium lauryl sulfonate 7g, sodium carboxymethyl cellulose 0.8g, water 80g, placed in a container and mechanically stirred quickly for 15 minutes to obtain foam; add 25.9g of foam to the raw meal, mechanically stirred for 10 minutes, and then add 3.9g starch, continue to stir for 20 minutes to obtain ceramic slurry; cast the ceramic slurry into a 90℃ oven for curing and drying to obtain a green body; put the green body in a sintering furnace, and then heat up from room temperature at 6℃ / min Sinter it at 1150°C for 1 hour, and obtain a lightweight foam ceramic after cooling.

[0038] Tested by Archimedes drainage method for density, rebound method for compressive strength, and flat plate met...

Embodiment 2

[0040] Take 30g of phosphate tailings, 5g of sludge, 11g of feldspar, 4g of shale, 3g of kaolin, 6.4g of yellow sand, 40g of water, 0.6g of sodium hexametaphosphate and ball mill and mix for 18h to obtain a uniformly mixed raw meal; take 5g of rosin soap, ten 4g of sodium dialkyl sulfonate, 0.1g of polyacrylamide, and 86g of water, placed in a container and quickly stirred for 20 minutes to obtain foam; add 10.6g of foam to the raw meal, mechanically stirred for 20 minutes, then add 0.6g of gum arabic, and continue stirring for 10 minutes To obtain ceramic slurry; cast the ceramic slurry into a 75℃ oven for curing and drying to obtain a green body; put the green body in a sintering furnace, and then heat up from room temperature at 2℃ / min to 1130℃, sintering for 1.5h , After cooling, a lightweight ceramic foam is obtained.

[0041] The test method is the same as in Example 1. The density of the lightweight ceramic foam is 0.264g / cm 3 , The compressive strength is 13.08MPa, and th...

Embodiment 3

[0043] Take 20g of phosphate tailings, 7.5g of silt, 14g of feldspar, 6g of shale, 7g of kaolin, 5.3g of yellow sand, 40g of water, and 0.2g of sodium humate, and ball mill and mix for 12h to obtain a uniformly mixed raw meal; take Tween 3g, ten 3g of sodium dialkylbensulfonate, 0.3g of polyacrylamide, and 90g of water, placed in a container and quickly stirred for 12.5min to obtain foam; add 18g of foam to the raw meal, mechanically stirred for 25min, then add 2g of gelatin, and continue to stir for 35min, Obtain the ceramic slurry; cast the ceramic slurry and place it in an oven at 70℃ to solidify and dry to obtain a green body; put the green body in a sintering furnace, and then heat up from room temperature at 5℃ / min to 1060℃, and sinter for 0.5h. After cooling, a lightweight ceramic foam is obtained.

[0044] The test method is the same as in Example 1. The density of the lightweight ceramic foam is 0.263g / cm 3 , The compressive strength is 12.64MPa, and the thermal conducti...

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Abstract

The invention relates to lightweight foamed ceramics and a preparation method of the lightweight foamed ceramics. The lightweight foamed ceramics are prepared by the steps as follows: mechanically agitating raw material, curing agent and foam based on a certain ratio, so as to obtain uniform ceramic size; moulding the ceramic size by casting; and curing and drying same at a certain temperature; and finally sintering the dried blank body to obtain the lightweight foamed ceramics. The lightweight foamed ceramics are important for efficiently utilizing the solid waste, reducing the pollution of the industrial solid waste to the environment, and reducing the production cost; the produced lightweight ceramics have the advantages of being more in closed air pores, relatively low in heat conductivity, relatively high in strength, and relatively low in sintering temperature; and the lightweight foamed ceramics are suitable to be applied to the fields of lightweight decorative material, building insulation wall material, sound insulating material, fireproof material and sinking preventing material.

Description

Technical field [0001] The invention belongs to the technical field of solid waste utilization, and relates to a lightweight foam ceramic, in particular to a lightweight foam ceramic and a preparation method thereof. Background technique [0002] my country's phosphate rock resources are quite rich, with reserves second only to Morocco, ranking second in the world. The eight largest phosphate rock is mainly distributed in Hubei, Hunan, Sichuan, Jiangsu, Guizhou, Yunnan and other provinces, but 80% of them are low- and medium-grade phosphate rock. Phosphate tailings are solid wastes discharged from the flotation concentrate of phosphate ore that cannot be fully utilized. In recent years, with the rapid development of the phosphate chemical industry and the low grade of phosphate ore in my country, the phosphate chemical industry produces a large amount of phosphate tailings every year. Phosphate tailings generally accumulate in the tailing pond in the form of fine sand, which not...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/10
Inventor 吉晓莉陈卓翟成成吴事江王先海
Owner GANSU WANTE TECH DEV
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