Method for preparing high-conductivity granular material by utilizing waste and old manganese-zinc ferrite

A technology of manganese-zinc-ferrite and manganese-zinc-ferrite, which is applied in the field of preparing high-conductivity granular materials, can solve the problems of not showing the advantages of the chemical co-precipitation method, reducing the initial magnetic permeability of magnetic devices, etc., and achieves good practical value , wide range of impurity removal, obvious economic benefits

Inactive Publication Date: 2013-02-13
ZHONGSHAN KECHENG CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If waste is used as raw material, although its cost can be effectively controlled, if only general impurity removal treatment is done, if the content of any of these added elements in the raw material exceeds a certain range, it will seriously reduce the quality of the porcelain. The initial magnetic permeability of the parts, the obtained products cannot be used to prepare high magnetic permeability cores, and can only be used as ordinary raw materials, and basically cannot reflect the advantages of the chemical co-precipitation process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] a. Sulfuric acid enhanced dissolution and impurity removal: Take 73 ml of industrial concentrated sulfuric acid, add 80 grams of grinding powder under stirring, control the reaction temperature at about 100 ° C, and soak for 2 hours. The solution (I) was obtained by filtration.

[0029] b. Reduction and impurity removal: Heat the solution (I) to 50°C, add 16 grams of iron powder, 6.5 grams of zinc powder, and 1.2 grams of manganese powder into it under stirring, and add the time for adding the three kinds of powders of iron, zinc and manganese The interval is 1 hour. After adding manganese powder for 1 hour, adjust the reaction solution to a suitable pH value with 3N sodium hydroxide aqueous solution, add 4 grams of iron powder, continue to react for 4 hours, and filter to obtain the solution (II).

[0030] c. Co-precipitation and impurity removal: use 6N sodium hydroxide aqueous solution as a precipitant, add the solution (II) under stirring, adjust the pH to 10.5, and...

Embodiment 2

[0036] a. Sulfuric acid enhanced dissolution and impurity removal: Take 73 ml of industrial concentrated sulfuric acid, add 80 grams of waste manganese zinc ferrite component powder that has been crushed and pulverized into powder under stirring, control the reaction temperature at about 100 ° C, soak for 2 Hour. The solution (I) was obtained by filtration.

[0037] b. Co-precipitation and impurity removal: use 6N sodium hydroxide aqueous solution as precipitant, add solution (I) under stirring, adjust pH to 10.5, react at 45°C, age for 3 hours, filter and wash with water to obtain manganese, zinc, iron and hydrogen Oxide coprecipitated powder (I).

[0038] c. Hydrolysis to remove impurity: add co-precipitation powder (I) into pure water 10 times the weight of precipitation powder, adjust pH to 12-13 with 2N aqueous sodium hydroxide solution, temperature 150°C, keep stirring for 8 hours, then cool down , filtered, and washed with water to obtain manganese-zinc-iron oxide co-...

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PUM

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Abstract

The invention discloses a method for preparing a high-conductivity granular material by utilizing waste and old manganese-zinc ferrite. The method comprises the following steps of: a, removing impurities by reinforced dissolution of sulfuric acid; b removing impurities by reduction; c, removing impurities by coprecipitation; and d, removing impurities by hydrolysis. The invention aims to overcome the defect in the prior art, and provides a method for preparing a high-magnetic conductivity (mu i is equal to over 10,000) compound raw material granular material of manganese-zinc ferrite by performing acid dissolution and impurity removal on grinding power and magnetic core wastes generated in the process of machining the magnetic cores and magnetic devices in obsolete electrical equipment.

Description

technical field [0001] The invention relates to a method for preparing high-conductivity pellets by using waste manganese-zinc ferrite. Background technique [0002] According to statistics in 2005, the output of manganese zinc ferrite in my country is 200,000-300,000 tons / year, and it is expected to reach 500,000-600,000 tons / year in 2015, and this magnetic material has been widely used in my country for nearly five years. Ten years of history, the resulting waste from the two sources will add up year by year. First, the grinding powder and magnetic core waste produced in the process of magnetic core processing accounted for more than 10% of the ferrite output. Second, the magnetic devices used in electrical equipment in the early years entered the ranks of waste products as the equipment was eliminated. The sum of the amount of waste manganese zinc ferrite formed every year is measured in hundreds of thousands of tons, and the amount accumulated year by year will increase ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/622C04B35/26
Inventor 张立军桑长春葛培盛傅峰李基森
Owner ZHONGSHAN KECHENG CHEM FIBER
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