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A kind of lightweight aggregate of fly ash-based wave-absorbing composite material and its preparation method

A composite material and fly ash technology, applied in the field of materials, can solve the problems of limitation and high density, and achieve the effects of low cost, wide source and low price

Active Publication Date: 2021-01-15
GUANGDONG TSINGDA TONGKE ENVIRONMENTAL PROTECTION TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional ferrite powder has the disadvantage of high density, which limits its application

Method used

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  • A kind of lightweight aggregate of fly ash-based wave-absorbing composite material and its preparation method
  • A kind of lightweight aggregate of fly ash-based wave-absorbing composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Mixing of dry materials: according to fly ash 1000g, Mn x Zn 1-x Fe 2 o 4 200g of wave absorbing agent, 100g of bentonite, 50g of kaolin, 50g of feldspar, and 10g of water reducer are weighed, and the powder is evenly mixed in a closed high-speed mixer at a speed of 2000-3000r / min, and the mixing time is about 15min;

[0022] (2) Preparation of clay mineral / ferrite composite wave absorbing agent slurry: first dissolve 2.5g of PVA in 250g of water, after the PVA is completely dissolved, add Mn xZn 1-x Fe 2 o 4 Add 50g of wave absorbing agent and 50g of bentonite into the aqueous solution, and stir thoroughly to form a uniform bentonite-based / ferrite composite wave absorbing agent slurry;

[0023] (3) The powder obtained in step (1) is granulated into a spherical shape through a disc granulator, the disc rotation speed is 30-40r / min, and the composite wave absorbing agent slurry obtained in step (2) is used to spray granulate , the diameter of the granulated ma...

Embodiment 2

[0025] (1) Mixing of dry materials: according to 1000g of fly ash, Ni x Zn 1-x Fe 2 o 4 250g of wave absorbing agent, 100g of bentonite, 50g of kaolin, 50g of feldspar, and 10g of water reducer are weighed, and the powder is evenly mixed in a closed high-speed mixer at a speed of 2000-3000r / min, and the mixing time is about 15min;

[0026] (2) Preparation of bentonite-based / ferrite composite wave absorbing agent slurry: First, dissolve 2.5g of PVB in 250g of water, and then dissolve Ni x Zn 1-x Fe 2 o 4 Add 35g of wave-absorbing agent and 65g of bentonite into the aqueous solution and stir thoroughly to form a uniform bentonite-based / ferrite composite wave-absorbing agent slurry;

[0027] (3) The powder obtained in step (1) is granulated into a spherical shape through a disc granulator, the disc rotation speed is 30-40r / min, and the composite wave absorbing agent slurry obtained in step (2) is used to spray granulate , the diameter of the granulated material ball is con...

Embodiment 3

[0029] (1) Mixing of dry materials: according to 1000g of fly ash, Co x Zn 1-x Fe 2 o 4 225g of wave absorbing agent, 125g of bentonite, 65g of kaolin, 50g of feldspar, and 10g of water reducer are weighed, and the powder is evenly mixed in a closed high-speed mixer at a speed of 2000-3000r / min, and the mixing time is about 15min;

[0030] (2) Preparation of bentonite-based / ferrite composite wave absorbing agent slurry: first dissolve 2.5g of PVA in 250g of water, and after the PVA is completely dissolved, add Co x Zn 1-x Fe 2 o 4 Add 40g of wave absorbing agent and 50g of bentonite into the aqueous solution, and stir thoroughly to form a uniform bentonite-based / ferrite composite wave absorbing agent slurry;

[0031] (3) The powder obtained in step (1) is granulated into a spherical shape through a disc granulator, the disc rotation speed is 30-40r / min, and the composite wave absorbing agent slurry obtained in step (2) is used to spray granulate , the diameter of the gr...

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Abstract

The invention provides a coal ash-based wave absorbing composite material lightweight aggregate and a preparation method thereof; the coal ash-based wave absorbing composite material lightweight aggregate uses the coal ash-based wave absorbing composite material as the core, and the core is wrapped by a clay mineral ferrite wave absorbing agent as a shell, thus forming a composite core-shell structure; the lightweight aggregate firstly evenly mixes the raw materials that include coal ash, bentonite, clay and ferrite; the wave absorbing agent can form electromagnetic network conduction in the raw material; granulation can form a sphere, and the sphere is wrapped by the clay mineral ferrite wave absorbing agent; a maintenance and sintering process is carried out, thus forming the coal ash-based wave absorbing composite material lightweight aggregate with a good wave absorbing performance; the prepared coal ash-based wave absorbing composite material lightweight aggregate has a good electromagnetic loss property, and can satisfy lightweight aggregate lightweight and high strength physical properties.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a lightweight aggregate of a fly ash-based wave-absorbing composite material and a preparation method thereof. Background technique [0002] With the rapid development of the modern electronics industry and the widespread use of various electronic products, mobile communications, broadcasting, radar, magnetic therapy, computers, etc. have become frequent contacts in people's daily life, making electromagnetic radiation a new Social nuisance. Electromagnetic radiation will affect people's health, and will cause serious interference to the surrounding electronic equipment, so that their working procedures will be out of order, resulting in wrong actions; at the same time, electromagnetic radiation will leak information, so that computers and other instruments have no information security guarantee . For this reason, many developed countries and international organiz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00
CPCH05K9/0081
Inventor 常杰善贾屹海赵凯
Owner GUANGDONG TSINGDA TONGKE ENVIRONMENTAL PROTECTION TECH CO LTD