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A method for preparing artificial sand using fly ash base polymer

A fly ash and artificial sand technology, applied in the field of waste resource utilization, can solve the problems of resource waste, low efficiency of fly ash utilization, environmental pollution, etc., to improve quality, accelerate chemical reaction speed, and reduce production cost effect

Active Publication Date: 2022-01-28
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Up to now, my country's fly ash resource utilization research has involved a wide range of related fields, and has achieved corresponding scientific research results to a certain extent. However, the actual utilization efficiency of fly ash in real life is not high at present. , there are still relatively large environmental pollution and waste of resources

Method used

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  • A method for preparing artificial sand using fly ash base polymer
  • A method for preparing artificial sand using fly ash base polymer
  • A method for preparing artificial sand using fly ash base polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A kind of method utilizing fly ash base polymer to prepare artificial sand, comprises the steps:

[0052] (1) Ingredients

[0053] Take by weight the following raw materials: 57 parts of fly ash, 43 parts of alkaline activator;

[0054] The basic activator is made up of the following raw materials in parts by weight: 23 parts of water glass, 23 parts of water;

[0055] The modulus (SiO 2 with Na 2 The molar ratio of O) is 1.3; The preparation steps are: sodium water glass (ω(SiO 2 )=26%, ω(Na 2 (O)=8.2%, modulus 3.28) and pure NaOH are mixed according to the mass ratio of 100:18.32, and stirred at a low speed for 1 hour, and then left to stand for 1 hour, waiting for cooling and aging.

[0056] The preparation method of the basic activator is as follows: water glass and water are mixed and stirred for 1 minute to make the basic activator;

[0057] (2) Granulation

[0058] According to the weight ratio of step (1), the fly ash is sprayed into the reaction vessel, ...

Embodiment 2

[0077] A kind of method utilizing fly ash base polymer to prepare artificial sand is basically the same as embodiment 1, the difference is:

[0078] The basic activator consists of the following raw materials in parts by weight: composite activator KOH-Na 2 SiO 3 : 12 parts, water: 33 parts; the composite activator KOH-Na 2 SiO 3 KOH, Na 2 SiO 3 The molar ratio is 5:1.

Embodiment 3

[0080] A kind of method utilizing fly ash base polymer to prepare artificial sand is basically the same as embodiment 1, the difference is:

[0081] The fly ash is an admixture fly ash, and the admixture fly ash is mixed with metakaolin in the fly ash, and the admixture ratio is as follows by mass percentage: 65% of fly ash, 35% of metakaolin; After the fly ash is mixed with metakaolin, a mixture is obtained, and the mixture is ground into a powder with a particle size of 8.05 microns to obtain the admixed fly ash.

[0082] The main components of fly ash and metakaolin in this example are shown in Table 1 below.

[0083] Table 1

[0084]

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Abstract

The invention discloses a method for preparing artificial sand by using fly ash base polymer, which belongs to the technical field of waste utilization. The present invention comprises the following steps: (1) Ingredients: Weigh the following raw materials in parts by weight: 55 to 60 parts of fly ash, 40 to 45 parts of an alkaline activator; the basic activator consists of the following raw materials in parts by weight Composition: 20 to 25 parts of water glass, 20 to 25 parts of water; (2) Granulation: Spray fly ash and alkaline activator into the reaction container, and the sprayed alkaline activator contacts with fly ash and agglomerates into a spherical shape Granules; (3) Curing: After curing the spherical particles, geopolymer particles are obtained; (4) Screening: the geopolymer particles are screened to obtain the finished artificial sand. The invention can recycle and utilize resources by using a large amount of solid waste fly ash; the artificial sand prepared by the invention meets the production requirements.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of waste, and in particular relates to a method for preparing artificial sand by using fly ash base polymer. Background technique [0002] Sand and gravel are an important part of the river ecosystem and an important habitat element of the river. With the interception of water and soil conservation facilities and reservoirs, the amount of sand coming from the river has been declining, and sand and gravel resources are becoming more and more precious, which urgently needs to be protected and managed. Sand and gravel resources are also high-quality building materials. With the rapid development of economic construction, the civil construction industry has become unprecedentedly active. The construction of a large number of infrastructure consumes a lot of resources. Among them, sand and gravel aggregates that account for more than 70% of the concrete volume need to be mined in mountains...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J2/00C04B18/02C04B40/02B01D46/02
CPCC04B18/021C04B40/0263B01J2/00B01D46/02C04B18/08C04B12/04C04B22/002C04B22/062C04B14/106
Inventor 徐迅王宗浩李莹江
Owner SOUTHWEAT UNIV OF SCI & TECH
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