Method for preparing high-modulus water glass by using fly ash

A high modulus water glass, fly ash technology, applied in the direction of alkali metal silicate, silicate, etc., to achieve the effect of mild conditions

Inactive Publication Date: 2019-02-15
SHANXI UNIV
View PDF7 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, the inventors utilized amorphous SiO in fly ash 2 On the basis of calcination and acid leaching, the crystalline phase quartz and mullite were transformed into amorphous SiO 2 , and finally prepared a high-mo

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing high-modulus water glass by using fly ash
  • Method for preparing high-modulus water glass by using fly ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Mix fly ash with 20wt% sodium hydroxide solution, control the solid-to-liquid ratio of fly ash and sodium hydroxide to 1:3, react at 100°C for 2 hours, and filter and separate the obtained desiliconized ash with Fly ash and sodium hydroxide are mixed and ground according to the Na:Al:Si molar ratio of 0.8, and roasted at 850°C for 2h; the roasted product is mixed with 20wt.% hydrochloric acid according to the solid-to-liquid ratio of 1:4, and reacted at 90°C for 2h After the reaction, filter and wash with water to obtain acid leaching residue; mix acid leaching residue and desiliconization solution at a ratio of 1:4, react at 80°C for 2 hours, and filter to obtain high modulus water glass.

Embodiment 2

[0035] Mix fly ash with 20wt% sodium hydroxide solution, control the solid-to-liquid ratio of fly ash and sodium hydroxide to 1:4, react at 95°C for 3 hours, and filter and separate the obtained desiliconized ash with Fly ash and sodium hydroxide are mixed and ground according to the Na:Al:Si molar ratio of 1.0, and roasted at 850°C for 3h; the roasted product is mixed with 20wt% hydrochloric acid according to the solid-to-liquid ratio of 1:5, and reacted at 90°C for 3h, After the reaction, filter and wash with water to obtain acid leaching residue; mix acid leaching residue and desiliconization solution at a ratio of 1:3.5, react at 100°C for 1 hour, and filter to obtain high modulus water glass.

Embodiment 3

[0037] Mix fly ash with 20wt% sodium hydroxide solution, control the solid-to-liquid ratio of fly ash and sodium hydroxide to 1:4, react at 100°C for 2 hours, and filter and separate the obtained desiliconized ash with Fly ash and sodium carbonate were mixed and ground according to the Na:Al:Si molar ratio of 0.8, and roasted at 890°C for 2h; the roasted product was mixed with 20wt.% hydrochloric acid according to the solid-to-liquid ratio of 1:5, and reacted at 90°C for 2h, After the reaction, filter and wash with water to obtain acid leaching residue; mix acid leaching residue and desiliconization solution at a ratio of 1:3.2, react at 90°C for 1 hour, and filter to obtain high modulus water glass.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for preparing high-modulus water glass by using fly ash. The method comprises the following steps: 1), mixing the fly ash and a sodium hydroxide solution with the concentration of 20wt.% according to a solid-liquid ratio of 1:2 to 1:4, reacting at 90-100 DEG C for 2-4h, and after completion of a reaction, performing filtering separation to obtain desiliconized ashand a desiliconized solution; 2), performing mixed grinding on the desiliconized ash, the fly ash and sodium salt, and calcinating at 850-900 DEG C for 2-3h; 3), mixing a calcinated product and a hydrochloric acid solution with the concentration of 20wt.%, reacting at 80-90 DEG C for 2-4h, and after completion of a reaction, filtrating and washing by using water to obtain an acid leaching residue,wherein the solid-liquid ratio of the calcinated product to hydrochloric acid is 1:3 to 1:6; 4), mixing the acid leaching residue with the desiliconized solution according to a solid-liquid ratio of1:2 to 1:5, reacting for 0.5-2h while heating at 70-100 DEG C, and then filtering to obtain the high-modulus water glass. The water glass prepared by the method has the modulus of 3.0 or above.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of industrial solid waste fly ash, and in particular relates to a method for preparing high-modulus water glass by using fly ash. Background technique [0002] Fly ash is one of the main solid wastes produced by coal-fired power plants, with an output of more than 600 million tons. At present, fly ash is widely used in the fields of building materials and construction engineering, with a utilization rate of 70%. The large amount of unutilized fly ash not only occupies valuable land resources, but also is had a serious impact on the environment. [0003] On the other hand, fly ash contains various oxides, such as Al 2 o 3 , SiO 2 , CaO, Fe 2 o 3 etc., where Al 2 o 3 and SiO 2 content of more than 80%. Therefore, extracting these oxides from fly ash to prepare high value-added chemical products can not only alleviate the environmental problems caused by fly ash, but also gener...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C01B33/32
CPCC01B33/32C01P2006/80
Inventor 程芳琴柳丹丹崔静磊郭彦霞吴海滨
Owner SHANXI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap