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A method for preparing glass-ceramics from waste incineration ash and pickling sludge

A waste incineration ash and waste incineration fly ash technology, which is applied in the field of comprehensive utilization of solid waste resources, can solve the problems of high cost, long process flow, and high energy consumption of glass-ceramics, and achieve reduced temperature difference, shortened process flow, and reduced activation Can effect

Active Publication Date: 2021-03-19
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In summary, there are problems such as high cost, high energy consumption, and long process flow in the preparation of glass-ceramic from waste incineration ash.

Method used

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  • A method for preparing glass-ceramics from waste incineration ash and pickling sludge

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Effect test

Embodiment 1

[0030] The embodiment of the present invention provides a method for preparing glass-ceramic from waste incineration ash and pickling sludge, specifically: mixing 10 wt% of waste incineration fly ash, 80 wt% of bottom ash and 10 wt% of pickling sludge Mixture, where CaO is 4wt%, SiO 2 35wt%, Al 2 o 3 9wt%, K 2 O is 5wt%, Na 2 O is 4wt%, CaF 2 3.5wt%, Fe 2 o 3 6wt%, Cr 2 o 3 0.6wt%. The mixture was heated to 1300°C and then kept for 0.5h to obtain a glass melt. The glass melt is rolled and formed to obtain the basic glass, and after a one-step nucleation and crystallization heat treatment at 800°C for 2 hours, it is cooled to room temperature to obtain a glass-ceramic product.

Embodiment 2

[0032]The embodiment of the present invention provides a method for preparing glass-ceramic from refuse incineration ash and pickling sludge, specifically: mixing 0wt% of refuse incineration fly ash, 80wt% of bottom ash and 20wt% of pickling sludge mixture, where SiO 2 35wt%, Al 2 o 3 12wt%, K 2 O is 4wt%, Na 2 O is 3wt%, CaF 2 8wt%, Fe 2 o 3 4wt%, Cr 2 o 3 is 5wt%. The mixture was heated to 1600° C. and then kept for 1.0 h to obtain a glass melt. The glass melt is calendered to obtain the basic glass, and after a one-step nucleation and crystallization heat treatment at 832°C for 1.0 h, it is cooled to room temperature to obtain a glass-ceramic product.

Embodiment 3

[0034] The embodiment of the present invention provides a method for preparing glass-ceramics by combining refuse incineration ash and pickling sludge, specifically: mixing 11wt% of refuse incineration fly ash, 76wt% of bottom ash and 13wt% of pickling sludge Mixture, where CaO is 4.5wt%, SiO 2 32wt%, Al 2 o 3 15wt%, K 2 O is 4.2wt%, Na 2 O is 3.2wt%, CaF 2 4wt%, Fe 2 o 3 5wt%, Cr 2 o 3 is 4wt%. The mixture was heated to 1370°C and then kept for 2.0 hours to obtain a glass melt. The glass melt is formed by the float method to obtain the basic glass, and after a one-step nucleation and crystallization heat treatment at 864°C for 2.0 hours, it is cooled to room temperature to obtain a glass-ceramic product.

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Abstract

The invention belongs to the field of solid waste resource utilization,and discloses a method for preparing glass ceramics by using waste incineration ash synergistic pickling sludge. The method useswaste incineration ash as a main raw material,uses the pickling sludge as a nucleating agent,obtains base glass by high temperature melting,and obtains the glass ceramic by one-step heat treatment. The method achieves the harmless disposal and high-value utilization of the waste incineration ash and the pickling sludge,prepares the glass ceramic through a melting-one-step heat treatment method,andhas the advantages of short process flow,energy saving and easy industrialization.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of solid waste resources, and specifically discloses a method for preparing glass-ceramic from waste incineration ash and pickling sludge. Background technique [0002] With the promotion of waste incineration technology in China, the disposal of waste incineration ash restricts the development of waste incineration industry. Waste incineration produces 20wt% bottom ash and 4wt% fly ash, collectively referred to as waste incineration ash, which is listed as HW18 hazardous solid waste because it contains heavy metals and dioxins. [0003] At present, waste incineration ash is generally disposed of by anti-seepage landfill, cement solidification, melting solidification and other disposal methods. The anti-seepage landfill not only occupies a large amount of land, it is easy to cause soil and groundwater pollution, but also the escape of dioxins causes air pollution; the cement solidificatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/00C03C6/06
CPCC03C1/002C03C10/0018C03C10/0063
Inventor 张深根赵世珍刘波
Owner UNIV OF SCI & TECH BEIJING
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