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High-activity admixture slurry made of wet fly-ash and method for preparing same

A technology for wet discharge of fly ash and admixtures, which is applied in the field of high-activity admixture slurry and its preparation, can solve the problems of high energy consumption and impossibility of popularization, and achieve pollution reduction, significant social and economic benefits, and production process simple effect

Inactive Publication Date: 2006-12-27
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a major defect of this method is that it consumes a lot of energy during the drying process and cannot be popularized.

Method used

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  • High-activity admixture slurry made of wet fly-ash and method for preparing same
  • High-activity admixture slurry made of wet fly-ash and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: as figure 1 Shown, a kind of highly active wet discharge fly ash admixture slurry preparation method, it comprises the steps:

[0038] 1) Raw material selection: select wet-discharged fly ash, measure the actual moisture content and carbon content of the wet-discharged fly ash, and age for later use; the moisture content of the wet-discharged fly ash is 25-35%, free calcium oxide (f -CaO) content ≤ 2.5%, sulfur trioxide (SO 3 ) content ≤ 3%, carbon content ≤ 12%; Blaine specific surface area is 350-400m 2 / Kg;

[0039] 2) Select reinforcing agent, surface modifier and activator according to Table 1 and mix to form modifier, set aside;

[0040]3) Select the wet-discharged fly ash, calcium-increasing solution and modifier according to Table 1. The calcium-increasing solution contains the mass of water in the wet-discharged fly ash; mix and grind for 10-30 minutes to obtain the product.

[0041] See Table 1 for the slurry mix ratio of a high-activity wet-...

Embodiment 2

[0049] A kind of preparation method of high activity wet row fly ash admixture slurry, it comprises the steps:

[0050] 1) Raw material selection: select wet-discharged fly ash, measure the actual moisture content and carbon content of the wet-discharged fly ash, and age for later use; the moisture content of the wet-discharged fly ash is 25-35%, free calcium oxide (f -CaO) content ≤ 2.5%, sulfur trioxide (SO 3 ) content ≤ 3%, carbon content ≤ 12%; Blaine specific surface area is 350-400m 2 / Kg;

[0051] 2) Modifier preparation: according to the mass percentages of the reinforcing agent, surface modifier and activator in the modifier: reinforcing agent 20, surface modifying agent 35, and activator 45, select the reinforcing agent, surface modifying agent and activator Agents are mixed and set aside; the enhancer is Na 2 CO 3 , the surface modifier is a high-efficiency naphthalene-based water reducer; the activator is Na 2 SO 4 ;

[0052] 3) According to the mass percent...

Embodiment 3

[0054] A kind of preparation method of high activity wet row fly ash admixture slurry, it comprises the steps:

[0055] 1) Raw material selection: select wet-discharged fly ash, measure the actual moisture content and carbon content of the wet-discharged fly ash, and age for later use; the moisture content of the wet-discharged fly ash is 25-35%, free calcium oxide (f -CaO) content ≤ 2.5%, sulfur trioxide (SO 3 ) content ≤ 3%, carbon content ≤ 12%; Blaine specific surface area is 350-400m 2 / Kg;

[0056] 2) Modifier preparation: according to the mass percentages of the reinforcing agent, surface modifier and activator in the modifier: reinforcing agent 20, surface modifying agent 35, and activator 45, select the reinforcing agent, surface modifying agent and activator Agents are mixed and set aside; the enhancer is Na 2 CO 3 , the surface modifier is a high-efficiency naphthalene-based water reducer; the activator is sodium hydroxide;

[0057] 3) According to the mass per...

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Abstract

The invention discloses high-active doping slurry and preparing method, which comprises the following parts: 55-65 percent wet-discharge coal ash, 30-44 percent calcium-increasing solution and 1-5 percent modifier, wherein the calcium-increasing solution is calcium hydroxide solution; the modifier is composed of 10-30 percent reinforcer, 20-40 percent surface modifier and 30-50 percent activist.

Description

technical field [0001] The invention belongs to building materials, and in particular relates to a high-activity admixture slurry and a preparation method thereof. Background technique [0002] At present, the main form of my country's electricity production comes from coal combustion—thermal power generation, which accounts for about 80% of the total. According to the statistics of the National Bureau of Statistics: In 2004, the national power generation reached 2,187 billion kwh, of which thermal power generation reached 1,807.3 billion kwh. For every 10 kWh electricity produced by thermal power generation, about 1 kg of fly ash waste material will be produced. So far, the accumulation of fly ash in my country has reached more than 1.3 billion tons, covering an area of ​​more than 500,000 mu, which has caused great harm and burden to the ecological environment of our country. At the same time, the coal currently used for power generation in the world accounts for about 6...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/08C04B20/00C04B22/10C04B24/12C04B24/24C04B22/14C04B22/06
CPCC04B18/08C04B40/0039Y02W30/91C04B22/064
Inventor 马保国张美香蹇守卫罗忠涛白建飞
Owner WUHAN UNIV OF TECH
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