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Technology for preparing base geopolymer eco-material

A technology of ecological materials and alkali bases, applied in the field of resource disposal of solid waste, to achieve the effects of good water storage, high utilization rate, and high process waste rate

Inactive Publication Date: 2017-08-15
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current research, three factors need to be considered for resource utilization of domestic waste incineration fly ash: (1) Performance and cost

Method used

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  • Technology for preparing base geopolymer eco-material
  • Technology for preparing base geopolymer eco-material
  • Technology for preparing base geopolymer eco-material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 100 parts of kaolin in a crucible, place it in a muffle furnace at 700°C for calcination for 2 hours, and after cooling to room temperature, grind it through a 100-mesh sieve for use. Take 70 parts of domestic waste incineration fly ash, 30 parts of metakaolin, and 10 parts of sodium hydroxide, put them in a container and mix them evenly, add 30 parts of water, stir at a frequency of 200 rpm for 20 minutes, pour the mixture into the mold to Vibrate at a frequency of 50 times / min for 2 minutes. The mold is placed in a drying oven at 80°C for 12 hours, and then the mold is removed, and the removed block is placed in a drying oven at 30°C for 21 days, and then the alkali-based polymer ecological material is obtained. The detection index of the test piece in embodiment 1 is shown in the subscript.

[0022] The test piece detection index in the table 1-1 embodiment 1

[0023]

[0024] The test piece heavy metal leaching value in the embodiment 1 of table 1-2

[00...

Embodiment 2

[0027] Take 100 parts of kaolin and place it in a crucible, place it in a muffle furnace at 900°C for calcination for 0.5h, and after cooling to room temperature, grind it through a 100-mesh sieve for use. Take 61 parts of household waste incineration fly ash, 29 parts of metakaolin, and 20 parts of sodium silicate in a container and mix them evenly, add 22 parts of water, stir at 120 rpm for 25 minutes, pour the mixture into the mold for 40 times Vibrate at a frequency of 3 minutes per minute. After the mold is placed in a drying oven at 50°C for 24 hours, the mold is removed, and the molded pieces are placed in a drying oven at 50°C for 16 days to obtain an alkaline-based polymer ecological material. The detection indexes of the test piece in embodiment 2 are shown in the subscript.

[0028] The test piece detection index in the table 2-1 embodiment 2

[0029]

[0030] The test piece heavy metal leaching value in the embodiment 2 of table 2-2

[0031]

Embodiment 3

[0033] Take 100 parts of kaolin and place it in a crucible, place it in a muffle furnace at 800°C for calcination for 1 hour, and after cooling to room temperature, grind it through a 100-mesh sieve for use. Take 50 parts of domestic waste incineration fly ash, 50 parts of metakaolin, 6 parts of potassium hydroxide and sodium silicate and mix them in a container, add 10 parts of water, stir at 50 rpm for 30 minutes, and inject the mixture after stirring Vibrate in the mold for 6 minutes at a frequency of 20 times / min. The mold was placed in a drying oven at 30°C for 48 hours, and then the mold was removed, and the removed block was placed in a drying oven at 80°C for 12 days to obtain an alkaline-based polymer ecological material. The detection indexes of the test piece in embodiment 3 are shown in the subscript.

[0034] The test piece detection index in the table 3-1 embodiment 3

[0035]

[0036] The test piece heavy metal leaching value in the embodiment 3 in table 3-...

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Abstract

The invention relates to a technology for preparing a base geopolymer eco-material. The technology comprises the steps of taking a proper amount of kaolin, calcining, grinding and sieving to obtain metakaolin; mixing the following raw materials evenly in parts by weight: 50-70 parts of domestic waste incineration fly ash, 30-50 parts of metakaolin, 10-20 parts of an excitant and a dry material, doping 10-30 parts of water, stirring evenly and injecting the mixture into a die for compaction; putting the mold into a drying oven for dry maintenance and then dismantling the die; and finally further maintaining a brick body after the die is dismantled in the drying oven of 30-80 DEG C for 12-21d to obtain the base geopolymer eco-material. A novel environment-friendly functional material is produced by using the metakaolin and the domestic waste incineration fly ash. The industrial wastes can be utilized through adjusting measures to local conditions, so that land and water resources are effectively protected and environmental pollution is controlled. The technology has significant environmental, economic and social benefits.

Description

technical field [0001] The invention relates to a resource disposal of solid waste, in particular to a process for preparing alkaline-based polymer ecological materials from domestic waste incineration fly ash. Background technique [0002] In the process of domestic waste incineration, the tail gas treatment process will produce fly ash which accounts for about 5% of the total waste incineration. It is estimated that the annual output of domestic waste incineration fly ash in my country is about 5 million tons. Fly ash is generally off-white or dark gray, with a particle size of less than 300 μm, a moisture content of 5% to 15%, a heat loss rate of 10% to 15%, and various particle shapes. The pollution caused by fly ash to the environment mainly includes heavy metal pollution, dioxin pollution and dissolved salt pollution. The main heavy metal pollution elements in fly ash are Pb, Cd and Ni. During the waste incineration process, due to incomplete incineration due to wast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/10C04B14/10
CPCC04B28/006C04B2201/20C04B2201/50C04B18/105C04B14/106C04B22/062C04B12/04Y02P40/10Y02W30/91
Inventor 康治金刘志英徐炎华徐学骁刘杨曹洁
Owner NANJING UNIV OF TECH
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