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Microcrystalline glass and preparation method thereof

A technology of glass-ceramics and industrial sludge, which is applied in the field of materials, can solve problems such as energy consumption, and achieve the effects of saving energy, reducing pollution, and reducing manufacturing costs

Active Publication Date: 2018-11-09
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Municipal sludge ash contains a large amount of Si, Al, Ca and other basic elements that form the matrix of glass-ceramic, but the current glass-ceramic preparation technology needs to control the temperature at about 1300 ° C, and it needs to be kept at high temperature for several hours. lead to massive consumption of energy

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  • Microcrystalline glass and preparation method thereof
  • Microcrystalline glass and preparation method thereof
  • Microcrystalline glass and preparation method thereof

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preparation example Construction

[0040] The present invention also provides a preparation method for the above-mentioned glass-ceramic, comprising the following steps:

[0041] S1 The molar ratio of the elements in the mixed mixture of municipal sludge ash and industrial sludge is: (Al+Fe):Pb:Cu:Zn=2-18:1-2:1-2:1-2 Quantitative mixing.

[0042] A better ratio is: (Al+Fe):Pb:Cu:Zn=8-14:1:1:1.

[0043] The selection of industrial sludge in this step can be selected and combined according to the content of heavy metals in electroplating industrial sludge, smelting industrial sludge, and lead paste of waste lead-acid batteries.

[0044] S2 Grind the mixture of municipal sludge ash and industrial sludge evenly, and then press it into thin slices with a tablet machine.

[0045] Before grinding, an appropriate amount of ethanol can be added to the mixture to make the mixture powder into a muddy paste, which is conducive to making the mixture more uniform in the subsequent grinding process.

[0046] After the mixi...

Embodiment 1

[0054] S1 Mix 29.01g of municipal sludge ash, 35.05g of electroplating industrial sludge, 64.52g of smelting industrial sludge, and 24.68g of waste lead paste.

[0055] In this step, the municipal sludge is selected from the dried sludge of Shenzhen Luofang Sewage Treatment Plant, and its main components and contents are:

[0056] SiO 2 42.69%; Al 2 o 3 18.6%; Fe 2 o 3 6.09%; CaO 0.9%; MgO 1.0%; K 2 O 2.47%, NaO 0.4%.

[0057] The above-mentioned municipal sludge is dried at 110°C, then sintered at 900°C to form sludge ash, which is passed through a 300-mesh sieve for later use.

[0058] In this step, the electroplating plant sludge selected by the electroplating industrial sludge mainly contains Fe 2 o 3 , CuO, Cr 2 o 3 And some insoluble impurities, use dehydration equipment and industrial sludge dryer to heat and dry, grind through a 300-mesh sieve for later use.

[0059] The smelting industrial sludge is selected from lead-zinc smelter sludge, which mainly co...

Embodiment 2

[0065] S1 Mix 26.07g of municipal sludge ash, 38.34g of electroplating industrial sludge, 70.64g of smelting industrial dry sludge, and 25.88g of waste lead-acid battery lead paste.

[0066] In this step, the municipal sludge is selected from the dried sludge of Shenzhen Shajing Sewage Treatment Plant, and its main components and contents are:

[0067] SiO 2 34.89%; Al 2 o 3 21.92%; Fe 2 o 3 8.27%; CaO 2.07%; MgO 0.59%; K 2 O1.51%.

[0068] The above-mentioned municipal sludge is dried at 110°C, then sintered at 900°C to form sludge ash, which is passed through a 300-mesh sieve for later use.

[0069] In this step, the electroplating industrial sludge is selected from electroplating factory sludge, mainly containing Fe 2 o 3 , CuO, Cr 2 o 3 And some insoluble impurities, use dehydration equipment and industrial sludge dryer to heat and dry, and grind to 300 mesh.

[0070] The smelting industrial sludge is selected from lead-zinc smelter sludge, which mainly conta...

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Abstract

Microcrystalline glass is provided and is prepared by mixing raw materials which are municipal sludge ash and industrial sludge. An element ratio that is (Al+Fe):Pb:Cu:Zn in the mixture of the municipal sludge ash and the industrial sludge is equal to 2-18:1-2:1-2:1-2. A preparation method includes mixing the raw materials according to the abovementioned ratio; uniformly grinding the mixture; thenpressing the mixture into sheets with a sheet pressing machine; maintaining the temperature of the sheets in a high-temperature furnace at 850-950 DEG C for a certain period of time; and cooling to obtain the microcrystalline glass. Solid wastes are adopted as the raw materials to prepare the microcrystalline glass so that objectives of recycling resources and protecting the environment are achieved, and stabilization of three heavy metals which are Zn, Pb and Cu which are seriously harmful can be achieved at a low sintering temperature because the industrial sludge polluted by the heavy metals Pb, Cu and Zn is doped, and the doped elements destroy a regular system of a pure phase system.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a method for constructing a glass-ceramic by using sludge as a raw material and a method for preparing the glass-ceramic. Background technique [0002] Glass-ceramics is a polycrystalline solid material containing a large number of microcrystalline phases and a certain amount of glass phases, which is produced by controlling or inducing crystallization of the basic glass with a specific material ratio during heat treatment. The coexistence of crystal phase and glass phase determines the diversity of microstructure and chemical composition of glass-ceramic, so that glass-ceramic has a variety of excellent properties. [0003] In the existing method for preparing glass-ceramics, pure chemical substances (pure phase Al 2 O 3 , SiO 2 , MgO, CaO, etc.) or mineral clay as a raw material, and mineral clay is a limited resource. Glass-ceramics are usually prepared under...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00C03B32/02
CPCC03B32/02C03C10/0063
Inventor 唐圆圆马维夏运雪
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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