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Method for preparing manganese-zinc ferrite wave absorbing material from casting waste dust

A technology of manganese-zinc ferrite and wave-absorbing material is applied in the field of comprehensive disposal and comprehensive utilization of solid waste, which can solve the problems of difficult disposal of foundry waste ash, reduce the production burden of enterprises, environmental pollution, etc., and achieve broadband electromagnetic wave absorption. The effect of high efficiency, high magnetic permeability, high electromagnetic wave absorption efficiency

Active Publication Date: 2018-11-23
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

[0005] Aiming at the problem that casting waste ash is difficult to deal with, the purpose of the present invention is to provide a method for preparing manganese-zinc ferrite wave-absorbing material by using foundry waste ash, so as to solve the problems caused by deep burial and stacking of foundry waste ash. Environmental pollution problems, while reducing the production cost of ferrite absorbing materials, greatly reducing the production burden of enterprises

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The sieved waste ash was calcined at 600°C for 2 hours, weighed 200g of cast waste ash after decarbonization and oxidation, added 1000mL of 8mol / L nitric acid solution, heated and stirred continuously to transform the iron, manganese and other elements into Ferric nitrate, manganese nitrate, the pH value of the solution after the complete reaction is about 4-5, the content of ferromanganese in the solid mixture is measured by a fluorescence analyzer, according to the measurement results, an appropriate amount of manganese nitrate and zinc oxide are added to the solution in proportion to adjust The component content of Fe, Mn, Zn in the solution makes the mole percentage content of Fe in the solution be 52.5%, the mole percentage content of Zn is 12%, and the rest is a small amount of side effects such as Ni, Cr, Ca, etc. that exist in Mn and other waste ash. Composition, wherein the Ni content is 100ppm, the Cr content is 100ppm, and the Ca content is 200ppm.

[0020] S...

Embodiment 2

[0027] The sieved waste ash was calcined at 600°C for 2 hours, weighed 200g of cast waste ash after decarbonization and oxidation, added 1000mL of 8mol / L nitric acid solution, heated and stirred continuously to transform the iron, manganese and other elements into Ferric nitrate, manganese nitrate, the pH value of the solution after the complete reaction is about 4-5, the content of ferromanganese in the solid mixture is measured by a fluorescence analyzer, according to the measurement results, an appropriate amount of manganese nitrate and zinc oxide are added to the solution in proportion to adjust The component content of Fe, Mn, Zn in the solution makes the mole percentage content of Fe in the solution be 53.5%, the mole percentage content of Zn is 13.5%, and the rest is a small amount of side effects such as Ni, Cr, Ca, etc. that exist in Mn and other waste ash. Composition, wherein the Ni content is 100ppm, the Cr content is 100ppm, and the Ca content is 200ppm.

[0028]...

Embodiment 3

[0035] The sieved waste ash was calcined at 600°C for 2 hours, weighed 200g of cast waste ash after decarbonization and oxidation, added 1000mL of 8mol / L nitric acid solution, heated and stirred continuously to transform the iron, manganese and other elements into Ferric nitrate, manganese nitrate, the pH value of the solution after the complete reaction is about 4-5, the content of ferromanganese in the solid mixture is measured by a fluorescence analyzer, according to the measurement results, an appropriate amount of manganese nitrate and zinc oxide are added to the solution in proportion to adjust The component content of Fe, Mn, Zn in the solution makes the mole percentage content of Fe in the solution be 53.5%, the mole percentage content of Zn is 13.5%, and the rest is a small amount of side effects such as Ni, Cr, Ca, etc. that exist in Mn and other waste ash. Composition, wherein the Ni content is 100ppm, the Cr content is 100ppm, and the Ca content is 200ppm.

[0036]...

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Abstract

The invention relates to a method for preparing a manganese-zinc ferrite wave absorbing material from casting waste dust. The preparation method mainly comprises the following steps of screening impurity removal, calcination carbon removal, oxidation, nitrification, silicon removal, quantitative preparation, self-propagating combustion synthesis, sintering and the like. The casting waste dust is subjected to grading treatment; the metal elements such as manganese and iron in the raw waste dust are fully recovered and utilized; the high value-added product is provided for the casting waste dust. The manganese-zinc ferrite wave absorbing material prepared by the method has the characteristics of high magnetic conductivity, wide frequency band and high electromagnetic wave absorption efficiency, and can be widely applied to various electronic products and national defense industrial wave absorbing products.

Description

technical field [0001] The invention belongs to the field of comprehensive disposal and comprehensive utilization of solid waste, and in particular relates to a method for preparing manganese-zinc ferrite wave-absorbing materials by utilizing foundry waste ash. Background technique [0002] With the continuous progress of modern electronic information technology, the development of electronic information and communication industry shows a trend of rapid development. More and more electronic products are an indispensable part of people's life. The inevitable electromagnetic radiation not only has a relatively strong impact on electronic equipment In addition to large interference, there is also harm to the human body. [0003] As a commonly used means of anti-electromagnetic interference, wave-absorbing material technology can absorb, convert and attenuate useless and harmful electromagnetic energy generated by electromagnetic pollution. hotspot. Absorbing materials mainly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622
CPCC04B35/2658C04B35/62204C04B2235/3262C04B2235/3284
Inventor 贾屹海常杰善赵凯
Owner GUANGDONG TSINGDA TONGKE ENVIRONMENTAL PROTECTION TECH CO LTD
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