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Porcelain granule and preparation method thereof

A technology of ceramsite and materials, which is applied in the field of ceramsite and its preparation, can solve the problems of insufficient utilization of waste residue, etc., and achieve the effect of rich pores, high strength and good surface properties

Inactive Publication Date: 2010-01-13
准格尔旗粉煤灰煤矸石研发中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the technical problem of insufficient utilization of waste slag in the prior art, and provides a ceramsite prepared from industrial waste and a preparation method thereof

Method used

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  • Porcelain granule and preparation method thereof

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preparation example Construction

[0025] figure 1 It is a schematic flow diagram of the preparation method of ceramsite of the present invention. Such as figure 1 As shown, the method includes the following steps:

[0026] Step 10. Take red mud, fly ash, pore-forming agent and binder as raw materials, and use coal gangue as sintering aid to perform ball milling and sieving respectively.

[0027] The chemical composition of the red mud of the present invention includes 23% to 26% SiO in weight percentage 2 , 4%~12% Fe 2 O 3 , 13%~15% Al 2 O 3 , 2%~4%Na 2 O and 42% to 57% CaO.

[0028] The chemical composition of the fly ash of the present invention includes 35%-45% SiO in weight percentage 2 , 3%~6% Fe 2 O 3 , 30%~40% Al 2 O 3 , 0.8%~1.2%Na 2 O and 6%-11% CaO.

[0029] The chemical composition of the coal gangue of the present invention includes 50% to 70% SiO in weight percentage 2 , 8%~11% Fe 2 O 3 , 18%~24% Al 2 O 3 , 0.1%~0.3%Na 2 O and 0.7% to 1.2% of CaO.

[0030] Among them, the red mud and fly ash are the main...

Embodiment 1

[0047] First, the red mud, fly ash, coal gangue, limestone and clay are respectively subjected to ball milling and sieving treatment; secondly, the material after ball milling and sieving is taken as 50% red mud and 30% powder according to its mass percentage. Coal ash, 10% coal gangue, 2% limestone and 8% clay are mixed uniformly, and 15% of the total mass of the mixed material is added to the mixture, and then the aging treatment is carried out for 8 hours; then, the stale Add 15% water to the total mass of the material again and mix it uniformly to form a spherical material; then put the spherical material into a drying device and dry it at 105°C for 11 hours; finally, put the dried spherical material into After the heating device is heated at 1140°C, the ceramsite can be obtained by natural cooling.

[0048] The ceramsite prepared by this example has an apparent porosity of 47.89%, a water absorption rate of 33.32%, and a bulk density of 1.53kg / m 3 , The crushing strength is ...

Embodiment 2

[0050] First, the red mud, fly ash, coal gangue, limestone and clay are respectively subjected to ball milling and sieving treatment; secondly, the material after ball milling and sieving treatment is taken as 60% red mud and 20% powder according to its mass percentage. Coal ash, 10% coal gangue, 6% limestone and 4% clay are mixed uniformly, and 20% of the total mass of the mixed material is added to the mixture, and then the aging treatment is carried out for 8 hours; then, the stale Add 10% water to the total mass of the material again and mix it uniformly to form a spherical material; then put the spherical material into a drying device and dry at 105°C for 9.5 hours; finally, put the dried spherical material into After the heating device is heated at 1160°C, the ceramsite can be obtained by natural cooling.

[0051] The ceramsite prepared by this embodiment has a apparent porosity of 48.83%, a water absorption rate of 32.19%, a bulk density of 1.52kg / m3, a crushing strength o...

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Abstract

The invention relates to a preparation method of porcelain granule, comprising the following steps: carrying out ball milling and screening process on red mud, flyash, coal gangue, pore former and binding agent; taking 50-65 percent of red mud, 20-30 percent of flyash, 10-20 percent of coal gangue, 4-10 percent of pore former and 1-5 percent of binding agent by weight percent to be uniformly mixed, adding water, uniformly mixing and carrying out staleness treatment; adding water again and uniformly mixing to carry out agglomerating treatment to form globular material; placing the globular material into a drying device for drying process; and placing the dried globular material into a heating device to heat and naturally cooling to obtain the porcelain granule. In the invention, industrial solid waste red mud is utilized as the main material, the flyash and the coal gangue are utilized as sintering aid, and proper pore former and binding agent are added as ingredients, thereby porous porcelain granules which have rich air outlets, favorable surface characteristic and high strength and meet the requirement of waste water treatment application are prepared through selecting preparation process and controlling sintering temperature.

Description

Technical field [0001] The invention relates to a ceramsite and a preparation method thereof, in particular to a ceramsite prepared by using industrial waste and a preparation method thereof. Background technique [0002] Red mud is the waste residue of the alumina industry. Due to the large output and low utilization rate, a large amount of red mud accumulates. With the development of the aluminum industry, the amount of red mud discharged from the production of alumina is increasing. At present, most alumina plants at home and abroad transport red mud to storage yards and build dams for storage. The accumulation of red mud not only takes up a lot of land, causing pollution to the environment, but also makes many useful components in the red mud unreasonably utilized, resulting in waste of resources. [0003] Fly ash is the waste produced after coal combustion, which is mainly collected and discharged from thermal power plants through flue gas filtration and electrical separatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00B09B3/00
Inventor 张开元
Owner 准格尔旗粉煤灰煤矸石研发中心
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