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A method for preparing non-sintering cementitious material by using waste incineration fly ash

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

Active Publication Date: 2022-03-08
浙江慧科环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • A method for preparing non-sintering cementitious material by using waste incineration fly ash
  • A method for preparing non-sintering cementitious material by using waste incineration fly ash
  • A method for preparing non-sintering cementitious material by using waste incineration fly ash

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Experimental program
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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 cementitious 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 ma...

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-...

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Abstract

The invention discloses a method for preparing a non-sintering cementitious material by using waste incineration fly ash: (1) mixing silicon slag and blast furnace slag, grinding and sieving to obtain a mixed silicon material, mixing graphite powder and waste incineration fly ash, Obtaining graphite fly ash; (2) mixing sodium hexametaphosphate, mixed silicon material and graphite fly ash to obtain a gelled precursor material; (3) dissolving the gelled precursor material in water, and performing low-temperature plasma irradiation while stirring, Drying, grinding and sieving to obtain secondary cementitious material; (4) mixing aluminum hydroxide waste with alkali slag, grinding and sieving to obtain aluminum activator; (5) mixing aluminum activator and secondary cementitious material Evenly, get gelling material. The preparation process does not require high-temperature sintering, which greatly saves process energy consumption; the cementitious material can achieve a maximum solidification rate of 99.24% of heavy metals, a removal rate of 98.75% of chlorine, and a removal rate of 98.37% of dioxins; The axial compressive strength is as high as 50.68MPa.

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

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Application Information

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Patent Type & Authority Patents(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
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