Preparation method of low-sulfur nano-iron powder

A technology of nano-iron powder and iron sheet, which is applied in the direction of nano-technology, process efficiency improvement, etc., and can solve the problems that only airflow classification equipment can be used

Inactive Publication Date: 2018-05-11
蒋央芳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Generally, the powder that can pass through the 325-mesh standard sieve, that is, the particle size is less than 44μm, is called sub-sieve powder. If you want to sieve with higher precision, you can only use airflow classification equipment, but for some easily oxidized iron powder, you can only use JZDF. Nitrogen protection classifier to do

Method used

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  • Preparation method of low-sulfur nano-iron powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A preparation method of low-sulfur nano iron powder includes the following steps:

[0057] (1) Crushing of waste zinc-manganese batteries, put the zinc-manganese batteries into a crusher and crush them into powder with a particle size of less than 200um;

[0058] (2) To dissolve the zinc-manganese battery powder material, add the zinc-manganese battery to the bottom water according to the solid-liquid ratio of 4:1, while adding acid to maintain the pH 1.1 of the reaction process, maintain the reaction temperature at 85°C, and stir at 400r / min. After 3.5 hours, take a sample of the filter residue to detect its manganese content. Add a reducing agent based on twice the mass of manganese in the filter residue, and react for 2 hours at pH 1.5, temperature 60°C, and stirring speed 400r / min to extract zinc in the residue. The manganese content is reduced to less than 0.5%;

[0059] (3) In addition to iron and aluminum, add step (1) crushed powder according to 2.2 times the mass of ...

Embodiment 2

[0075] A preparation method of low-sulfur nano iron powder includes the following steps:

[0076] (1) Crushing of waste zinc-manganese batteries, put the zinc-manganese batteries into a crusher and crush them into powder with a particle size of less than 200um;

[0077] (2) To dissolve the zinc-manganese battery powder material, add the zinc-manganese battery to the bottom water according to the solid-liquid ratio of 4:1, while adding acid to maintain the pH 1.1 of the reaction process, maintain the reaction temperature at 85°C, and stir at 400r / min. After 3.5 hours, take a sample of the filter residue to detect its manganese content. Add a reducing agent based on twice the mass of manganese in the filter residue, and react for 2 hours at pH 1.5, temperature 60°C, and stirring speed 400r / min to extract zinc in the residue. The manganese content is reduced to less than 0.5%;

[0078] (3) In addition to iron and aluminum, add step (1) crushed powder according to 2.2 times the mass of ...

Embodiment 3

[0093] A preparation method of low-sulfur nano iron powder includes the following steps:

[0094] (1) Crushing of waste zinc-manganese batteries, put the zinc-manganese batteries into a crusher and crush them into powder with a particle size of less than 200um;

[0095] (2) To dissolve the zinc-manganese battery powder material, add the zinc-manganese battery to the bottom water according to the solid-liquid ratio of 4:1, while adding acid to maintain the pH 1.1 of the reaction process, maintain the reaction temperature at 85°C, and stir at 400r / min. After 3.5 hours, take a sample of the filter residue to detect its manganese content. Add a reducing agent based on twice the mass of manganese in the filter residue, and react for 2 hours at pH 1.5, temperature 60°C, and stirring speed 400r / min to extract zinc in the residue. The manganese content is reduced to less than 0.5%;

[0096] (3) In addition to iron and aluminum, add step (1) crushed powder according to 2.2 times the mass of ...

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Abstract

The invention discloses a preparation method of low-sulfur nano-iron powder, and belongs to the technical field of metal powder preparation. The preparation method comprises the following steps that breaking of a waste zinc-manganese battery is carried out, concretely, the waste zinc-manganese battery is put in a breaker to be broken into powder with the particle size being below 200 micrometers;the zinc-manganese battery powder is dissolved by adding acid and a reducing agent; pH is adjusted for removing iron and aluminum; zinc is separated from manganese and zinc sulfate is prepared, wherein zinc is subjected to extraction separation by adopting a P204 extraction agent; impurity removal is carried out, concretely, a heavy metal capturing agent and fluoride are added so as to remove heavy metal and calcium and magnesium; and preparation of a manganese sulfate solution is carried out, concretely, manganese is subjected to extraction separation by adopting P507, then an obtained pure manganese solution is condensed and crystallized, and thus battery-grade manganese sulfate is obtained. With the adoption of the preparation method of the low-sulfur nano-iron powder, the battery-grademanganese sulfate and high-purity zinc sulfate crystals can be obtained, the obtained manganese sulfate crystals are granular, an agglomeration phenomenon does not exists, a technology is simple andrecovery of full components is realized.

Description

Technical field [0001] The invention relates to a method for preparing low-sulfur nano iron powder, and belongs to the technical field of metal powder preparation. Background technique [0002] According to the particle size, it is customarily divided into five grades: coarse powder, medium powder, fine powder, fine powder and superfine powder. The iron powder composed of particles with a particle size in the range of 150-500μm is coarse powder, with a particle size of 44-150μm for medium powder, 10-44μm for fine powder, 0.5-10μm for very fine powder, and less than 0.5μm for ultrafine powder powder. Generally, the powder that can pass through the 325 mesh standard sieve, that is, the particle size is less than 44μm, is called sub-sieve powder. For higher-precision screening, you can only use air classification equipment, but for some easily oxidized iron powder, you can only use JZDF. Nitrogen protection classifier to do it. Iron powder mainly includes reduced iron powder and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B19/20C22B47/00C22B3/38C22B23/00C22B15/00C22B26/20C22B26/22C22B13/00C22B17/00B22F9/22B82Y40/00
CPCB22F9/22B82Y40/00C22B7/007C22B13/045C22B15/0065C22B15/0084C22B17/04C22B19/22C22B23/0407C22B23/0453C22B26/20C22B26/22C22B47/00C22B3/3844C22B3/3846Y02P10/20
Inventor 蒋央芳
Owner 蒋央芳
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