Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing sintering-free cementing material from waste incineration fly ash

A technology of waste incineration fly ash and cementitious materials, which is applied in cement production, etc., to achieve the effects of saving process energy consumption, avoiding secondary pollution problems, and realizing harmless and resourceful utilization

Active Publication Date: 2020-08-28
浙江慧科环保科技有限公司
View PDF8 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: In view of the above problems, the present invention proposes a method for preparing non-sintering cementitious materials by using waste incineration fly ash. In the process of preparing cementitious materials, high-temperature sintering is not required, which greatly saves energy consumption and can effectively solve the problem of waste incineration flying ash. Problems caused by heavy metals, dioxins and chloride ions in ash

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 sintering-free cementing material from waste incineration fly ash
  • Method for preparing sintering-free cementing material from waste incineration fly ash
  • Method for preparing sintering-free cementing material from waste incineration fly ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Effect of mass ratio of graphite powder and waste incineration fly ash on the performance of prepared cementitious materials

[0023] Preparation of gelling material: as figure 1 As shown, silicon slag and blast furnace slag were weighed according to the mass ratio of silicon slag and blast furnace slag at 1:1, mixed and ground, and passed through a 200 mesh sieve to obtain a mixed silicon material; according to the mass ratio of graphite powder and waste incineration fly ash of 0.5:100 , 0.7:100, 0.9:100, 1:100, 3:100, 5:100, 5.5:100, 6.5:100, 7.5:100 respectively take graphite powder and refuse incineration fly ash, mix, get graphite fly ash; Weigh sodium hexametaphosphate, mixed silicon material, and graphite fly ash according to the mass ratio of sodium hexametaphosphate, mixed silicon material, and graphite fly ash of 2:10:100, and mix to obtain a gelled precursor material; according to the liquid-solid ratio of 1 mL: Mix 1mg of water and gelling precursor materia...

Embodiment 2

[0037] Effect of mass ratio of sodium hexametaphosphate, mixed silicon material, and graphite fly ash on the properties of prepared cementitious materials

[0038] Preparation of cementitious material: Weigh silicon slag and blast furnace slag respectively according to the mass ratio of silicon slag and blast furnace slag 1.5:1, mix and grind, pass through a 300-mesh sieve to obtain mixed silicon material; according to the mass ratio of graphite powder and waste incineration fly ash 5:100 respectively take graphite powder and refuse incineration fly ash, mix, get graphite fly ash; According to sodium hexametaphosphate, mixed silicon material, graphite fly ash mass ratio 2:5:100, 2:7:100, 2: 9:100, 0.5:10:100, 1:10:100, 1.5:10:100, 2:10:100, 2:15:100, 2:20:100, 4:10:100, 4:15: 100, 4:20:100, 6:10:100, 6:15:100, 6:20:100, 6.5:20:100, 7:20:100, 7.5:20:100, 6:21:100, 6:23:100 and 6:25:100 respectively weigh sodium hexametaphosphate, mixed silicon material and graphite fly ash, an...

Embodiment 3

[0045] Effect of the mass ratio of aluminum activator and secondary cementitious material on the properties of the prepared cementitious material

[0046] Preparation of cementitious material: Weigh silicon slag and blast furnace slag respectively according to the mass ratio of silicon slag and blast furnace slag 2:1, mix and grind, and pass through a 400-mesh sieve to obtain mixed silicon material; according to the mass ratio of graphite powder and waste incineration fly ash Take graphite powder and waste incineration fly ash at 5:100 respectively, and mix them to obtain graphite fly ash; weigh sodium hexametaphosphate, mix them according to the mass ratio of sodium hexametaphosphate, mixed silicon material, and graphite fly ash at 6:20:100. Silicon material and graphite fly ash were mixed to obtain gelled precursor material; water and gelled precursor material were mixed according to the liquid-solid ratio of 3mL:1mg, stirred at 480rpm, and simultaneously irradiated with low-...

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

PropertyMeasurementUnit
compressive strengthaaaaaaaaaa
compressive strengthaaaaaaaaaa
compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a sintering-free cementing material from waste incineration fly ash. The method comprises the following steps: (1) mixing silicon slag and blast furnaceslag, grinding, sieving to obtain a mixed silicon material, and mixing graphite powder and waste incineration fly ash to obtain graphite fly ash; (2) mixing sodium hexametaphosphate, the mixed siliconmaterial and graphite fly ash to obtain a gel precursor material; (3) dissolving the gelling precursor material in water, stirring while performing low-temperature plasma irradiation, drying, grinding and sieving to obtain a secondary cementing material; (4) mixing aluminum hydroxide waste and alkaline residues, grinding, and sieving to obtain an aluminum activator; and (5) uniformly mixing the aluminum activator and the secondary cementing material to obtain the cementing material. High-temperature sintering is not needed in the preparation process, so that process energy consumption is greatly reduced; the cementing material can achieve the highest heavy metal curing rate of 99.24%, the highest chlorine removal rate of 98.75% and the highest dioxin substance removal rate of 98.37%; andthe uniaxial compressive strength of a prepared mortar test block is as high as 50.68 MPa.

Description

technical field [0001] The invention relates to resource utilization of domestic garbage incineration fly ash, in particular to a method for preparing non-sintering cementitious materials by using garbage incineration fly ash. Background technique [0002] Domestic waste incineration fly ash refers to the fly ash particles captured by the flue gas evolution system after domestic waste incineration. Domestic waste incineration fly ash contains a variety of toxic and harmful substances, so it is included in the "National Hazardous Waste List" for management. In addition to toxic and harmful substances such as heavy metals and dioxins, domestic waste incineration fly ash also contains a large number of soluble components, such as sulfate, chloride ions, and alkali metal ions. Toxic and harmful substances and easily soluble components in the fly ash of domestic waste incineration are the main reasons that hinder its resource utilization. [0003] At present, the main resource ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/28C04B7/153C04B7/24C04B7/36C04B12/00
CPCC04B7/243C04B7/1535C04B7/24C04B7/36C04B12/005Y02P40/10
Inventor 黄涛宋东平金俊勋刘龙飞周璐璐张树文
Owner 浙江慧科环保科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com