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Method for preparing ceramsite raw material from household garbage incineration fly ash as well as product and application thereof

A technology of domestic waste incineration and waste incineration fly ash, which is applied in the fields of application, clay products, ceramic products, etc., can solve the problems of poor performance of ceramsite, and achieve the effect of simple preparation process

Active Publication Date: 2020-10-16
浙江中陶环保科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to avoid the generation of chloride-containing waste gas and the corrosion of chlorine to the kiln, some researchers currently use domestic waste incineration fly ash to prepare unfired ceramsite, but the preparation process requires the addition of a large amount of cementitious materials and alkali activators. The performance of ceramsite is far worse than that of ceramsite fired at high temperature

Method used

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  • Method for preparing ceramsite raw material from household garbage incineration fly ash as well as product and application thereof
  • Method for preparing ceramsite raw material from household garbage incineration fly ash as well as product and application thereof
  • Method for preparing ceramsite raw material from household garbage incineration fly ash as well as product and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The influence of embodiment 1 sodium sulfate concentration on ceramsite raw material performance

[0024] According to the solid-liquid ratio of domestic waste incineration fly ash to water of 1:1 g / mL, the domestic waste incineration fly ash and water were weighed respectively, mixed and stirred evenly to obtain waste incineration fly ash slurry. Weigh sodium sulfate and dissolve it into water to obtain sodium sulfate aqueous solution, wherein the concentrations of sodium sulfate are 0.025M, 0.035M, 0.045M, 0.05M, 0.15M, 0.25M, 0.26M, 0.28M, 0.30M. Pour nine groups of waste incineration fly ash slurry into the sample disposal area of ​​the electrodynamic reaction tank, respectively add nine groups of sodium sulfate aqueous solutions to the cathode and anode to submerge the nine groups of fly ash slurry piled up in the sample disposal area. Start the DC power supply for 1 hour of electrokinetic removal treatment to obtain nine groups of dechlorinated mortars, in which t...

Embodiment 2

[0039] Embodiment 2 The influence of voltage gradient on the performance of ceramsite raw materials

[0040] According to the solid-liquid ratio of domestic waste incineration fly ash to water of 1.5:1g / mL, the domestic waste incineration fly ash and water were weighed, mixed, and stirred evenly to obtain waste incineration fly ash slurry. Sodium sulfate was weighed and dissolved in water to obtain an aqueous sodium sulfate solution, wherein the concentration of sodium sulfate was 0.25M. The waste incineration fly ash slurry is poured into the sample disposal area of ​​the electric reaction tank, and sodium sulfate aqueous solution is added to the cathode and anode respectively until the fly ash slurry piled up in the sample disposal area is submerged. Start the DC power supply for 2 hours of electric removal treatment to obtain dechlorinated mortar, wherein the voltage gradients applied to the sample area during the electric process are 0.25V / cm, 0.35V / cm, 0.45V / cm, 0.5V / cm, ...

Embodiment 3

[0046] Example 3 Effect of fly ash, triisopropanolamine, and alkali-activated dechlorination mortar mass ratio on the performance of ceramsite raw materials

[0047] According to the solid-liquid ratio of the domestic waste incineration fly ash to water of 2:1 g / mL, the domestic waste incineration fly ash and water were weighed, mixed, and evenly stirred to obtain the waste incineration fly ash slurry. Sodium sulfate was weighed and dissolved in water to obtain an aqueous sodium sulfate solution, wherein the concentration of sodium sulfate was 0.25M. The waste incineration fly ash slurry is poured into the sample disposal area of ​​the electric reaction tank, and sodium sulfate aqueous solution is added to the cathode and anode respectively until the fly ash slurry piled up in the sample disposal area is submerged. Start the DC power supply for 3 hours of electrokinetic removal to obtain dechlorinated mortar, wherein the voltage gradient applied to the sample area during the e...

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Abstract

The invention discloses a method for preparing a ceramsite raw material from household garbage incineration fly ash as well as a product and application thereof. The method comprises the following steps: weighing water and household garbage incineration fly ash, and uniformly mixing and stirring to obtain garbage incineration fly ash slurry; pouring the waste incineration fly ash slurry into a sample treatment area of an electric device, respectively adding a sodium sulfate aqueous solution into an anode chamber and a cathode chamber until the sodium sulfate aqueous solution submerges the flyash slurry stacked in the sample treatment area, and starting a power supply for electric removal to obtain dechlorinated ash slurry; after electric removal, mixing the dechlorinated mortar with all cathode chamber electrolyte, and uniformly stirring to obtain alkali-activated dechlorinated mortar; weighing fly ash, triisopropanolamine and alkali-activated dechlorinated mortar, uniformly mixing and stirring, aging, drying and grinding into powder to obtain a ceramsite raw material. The preparation process is simple, and 99% of chlorine in the fly ash can be removed to the maximum extent. According to the invention, no additional alkali activator needs to be added, the stacking density of the fly ash sintered ceramsite prepared by the method is reduced by 44% compared with that of conventional fly ash sintered ceramsite, and the barrel compressive strength is improved by 56% at most.

Description

technical field [0001] The invention relates to the field of harmless disposal and resource utilization of hazardous wastes, in particular to a method for preparing ceramsite raw materials from domestic waste incineration fly ash and its products and applications. Background technique [0002] At present, with the rapid expansion of the city scale, the output of domestic waste in the city has increased sharply. The piled domestic garbage not only takes up a lot of land resources, but also brings serious environmental pollution problems. Waste incineration power generation technology can not only greatly reduce the quality and volume of domestic waste, but also use the heat energy obtained from combustion to generate electricity. Domestic waste incineration fly ash refers to the substances produced by the condensation or chemical reaction of heavy metals and inorganic salts volatilized under high temperature conditions during the waste incineration process during the cooling...

Claims

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Application Information

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IPC IPC(8): C04B38/06C04B18/02C04B33/135C04B20/02
CPCC04B38/009C04B33/1355C04B18/027C04B20/02C04B38/06C04B18/023C04B18/08C04B18/105C04B24/122C04B33/1352C04B38/0605Y02P40/60
Inventor 黄涛戴宇星苏怡宇宋东平金俊勋杜晶刘龙飞周璐璐
Owner 浙江中陶环保科技集团有限公司