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Foam glass prepared from fly ash as well as preparation method and application thereof

A foam glass and fly ash technology, applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve the problems of fly ash polluting the environment and achieve the effects of avoiding environmental hazards, reducing pore content, and reducing pore size

Pending Publication Date: 2021-01-29
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the above problems, the object of the present invention is to provide a foam glass prepared by using fly ash and its preparation method and application. The problem of ash polluting the environment; the foam glass prepared by using fly ash has higher strength and less harmful substance release

Method used

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  • Foam glass prepared from fly ash as well as preparation method and application thereof
  • Foam glass prepared from fly ash as well as preparation method and application thereof
  • Foam glass prepared from fly ash as well as preparation method and application thereof

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Embodiment 4

[0028] 1) The fly ash was mixed with glass powder and silicon carbide for 30 minutes using a planetary dry ball mill to obtain a mixture. The mass fraction of fly ash in the mixture was 15%, and the mass fraction of silicon carbide in the mixture was 1%. Add PVB alcohol solution with a mass concentration of 10% to the mixture. The mass of PVB alcohol solution is 5% of the mixture. After granulation, carry out semi-dry pressing molding with a molding pressure of 20 tons to obtain a green body with a specification of φ30×10mm ;

[0029] 2) Heat the green body at 120°C for 12 hours, then raise the temperature to 720°C for 4 hours, then raise the temperature to 950°C for 30 minutes at a heating rate of 4°C / min for foaming, and finally cool down to 560°C for 4 hours and then The temperature of the furnace is lowered, and the foam glass prepared by using fly ash is obtained, such as figure 1 , 2 As shown in the figure, it can be seen that the product has typical closed-cell foam g...

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Abstract

The invention discloses foam glass prepared from fly ash as well as a preparation method and application of the foam glass, and belongs to the technical field of foam glass preparation. Fly ash and glass powder are adopted as raw materials and mixed with a foaming agent, then a PVB alcoholic solution is added for granulation, and after molding, high-temperature foaming is conducted through two times of heating, so that the foam glass is obtained. Through two times of heating and heat preservation, part of dioxin can be effectively decomposed, and meanwhile, the formation amount of a high-temperature melt phase is promoted so as to effectively coat residual dioxin, high chlorine, high calcium and heavy metal components. According to the method, the high-temperature melt effectively coats the high chlorine, high calcium, heavy metal components and residual dioxin, the heavy metal elements are left to stand in water for a long time, leakage of the high calcium and high chlorine componentsis little, and harm of the components to the environment is avoided. The method is simple in process and suitable for large-scale production, the fly ash is adopted as the raw material, and the problem of environmental pollution is solved while the low-cost raw material is obtained.

Description

technical field [0001] The invention belongs to the technical field of foam glass preparation, and in particular relates to a foam glass prepared by using fly ash, a preparation method and application thereof. Background technique [0002] Fly ash is a mixture of high chlorine, high calcium, dioxin and heavy metal oxides, and is a highly hazardous solid waste. Improper disposal of fly ash will cause serious poisoning to the environment. At present, Japan's treatment measures for fly ash are mainly high-temperature melting to prepare glass bodies, with an effective utilization rate of 86%. The main uses are asphalt, aggregates for paving, landfill soil, and aggregates for concrete. The disposal of fly ash in the United States and Germany is mainly based on landfill, and the resource utilization is still in the basic research and pilot test stage. The current status of domestic waste incineration fly ash disposal is still dominated by solidification / stabilization-landfill. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B19/08C03C11/00C04B14/22
CPCC03B19/08C03C11/007C04B14/22
Inventor 白建光何天颖王润星陈平梁利东柴德亮黄瑞张阳
Owner SHAANXI UNIV OF SCI & TECH
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