Preparing method for microwave absorbing material based on fly ash

A technology of microwave absorbing materials and fly ash, which is applied in the production of ceramic materials, clay products, applications, etc., can solve the problems of difficult to achieve large-scale production and application, high requirements for production equipment, complex process, etc., and achieve high adsorption activity, Inexpensive and wide-ranging effects

Inactive Publication Date: 2019-05-24
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In the existing method of using fly ash to prepare composite microwave absorbing materials, the fly ash is firstly processed to obtain floating beads, and then modified pretreatment, including cleaning, sensitization and activation processes, requires high production equipment and complicated process , high cost, only suitable for laboratory research, difficult to achieve large-scale production applications

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  • Preparing method for microwave absorbing material based on fly ash

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Effect test

Embodiment 1

[0027] A preparation method of microwave absorbing material based on fly ash, comprising the following steps:

[0028] S1. Sieve the fly ash through a 300-mesh standard sieve, and dry it at a constant temperature at 110°C for 5 hours;

[0029] S2. Weigh fly ash powder and soluble starch (mass ratio accounts for 30% of the fly ash powder) and place them in an EIRICH intensive mixer to stir evenly to make mixed raw material powder;

[0030] S3. Weigh the deionized water and mixed raw material powder according to the mass ratio of 1:7, put them in the Eilixu powerful mixer and process them into ceramic raw meal balls, then dry the ceramic raw meal balls at 100°C, pass through the sieve Divide into fly ash-based ceramic microspheres with a particle size of 0.2-0.8 mm;

[0031] S4. Dissolving cobalt salts (one or more of cobalt nitrate, cobalt sulfate or cobalt chloride) in deionized water to make a 2+ The precursor solution, the mass of cobalt salt and the volume ratio of deioni...

Embodiment 2

[0035] A preparation method of microwave absorbing material based on fly ash, comprising the following steps:

[0036] S1. Sieve the fly ash through a 300-mesh standard sieve, and dry it at a constant temperature at 100°C for 6 hours;

[0037] S2. Weigh fly ash powder and soluble starch (mass ratio accounts for 20% of the fly ash powder) and place them in the EIRICH intensive mixer to stir evenly to make mixed raw material powder;

[0038] S3. Weigh the deionized water and mixed raw material powder according to the mass ratio of 1:7, put them in the Ailixu powerful mixer and process them into ceramic raw meal balls, then dry the ceramic raw meal balls at 100°C, pass through the sieve Divide into fly ash-based ceramic microspheres with a particle size of 0.2-0.8 mm;

[0039] S4. Dissolving cobalt salts (one or more of cobalt nitrate, cobalt sulfate or cobalt chloride) in deionized water to make a 2+ The precursor solution, the mass of cobalt salt and the volume ratio of deion...

Embodiment 3

[0043] A preparation method of microwave absorbing material based on fly ash, comprising the following steps:

[0044]S1. Sieve the fly ash through a 300-mesh standard sieve, and dry it at a constant temperature at 100°C for 6 hours;

[0045] S2. Weigh fly ash powder and soluble starch (mass ratio accounts for 30% of the fly ash powder) and place them in an EIRICH intensive mixer to stir evenly to make mixed raw material powder;

[0046] S3. Weigh the deionized water and mixed raw material powder according to the mass ratio of 1:7, put them in the Eilixu powerful mixer and process them into ceramic raw meal balls, then dry the ceramic raw meal balls at 100°C, pass through the sieve Divide into fly ash-based ceramic microspheres with a particle size of 0.2-0.8 mm;

[0047] S4. Dissolving cobalt salts (one or more of cobalt nitrate, cobalt sulfate or cobalt chloride) in deionized water to make a 2+ The precursor solution, the mass of cobalt salt and the volume ratio of deioniz...

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Abstract

The invention relates to a preparing method for a novel microwave absorbing material based on fly ash, and belongs to the technical field of microwave absorbing materials. The preparing method in thetechnical scheme includes the steps that firstly, the fly ash is screened, soluble starch is added, and through an Eirich powerful mixing machine, fly-ash ceramic raw meal balls are synthesized; then,the raw meal balls are screened, dried and then put into a precursor solution dissolving metal ions Co2+, and then the precursor solution is introduced into the raw meal balls with a liquid phase synthesis method; finally, through carbon thermal reduction, the ceramic composite microwave absorbing material carrying a metal simple substance Co is obtained. According to the preparing method for thenovel microwave absorbing material based on the fly ash, the fly ash as a raw material is solid waste, and is wide in source, low in cost and suitable for large-scale production application; as the specific surface area of the fly ash is large, the fly ash has high adsorption activity, and is an ideal carrier material. The ceramic composite wave-absorbing material prepared with the method has board application prospects.

Description

technical field [0001] The invention belongs to the technical field of microwave absorbing materials, and in particular relates to a preparation method of fly ash-based microwave absorbing materials. Background technique [0002] Fly ash is mainly fine powdery solid waste discharged from thermal power plants and large industrial and mining enterprises after burning coal. A large amount of fly ash not only occupies land resources, but also causes serious pollution to the atmosphere, soil and water. With the rapid development of my country's electric power industry, the discharge of fly ash continues to increase. At present, my country's fly ash emissions account for nearly 1 / 5 of the global total, but its average utilization rate is relatively low. Therefore, how to solve the contradiction of oversupply of comprehensive utilization of fly ash and realize the recycling and reuse of solid waste fly ash is not only related to the sustainable development of the national coal indu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/135C04B41/88C04B35/185
CPCY02P40/60
Inventor 力国民秦梅王凯悦周毅武雅乔张克维田玉明柴跃生白频波
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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