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Preparation method of MnZn ferrite powder with galvanizing zinc slag and pickling waste liquid as raw materials

A technology for pickling waste liquid and ferrite, which is applied in the field of MnZn ferrite powder preparation, can solve the problems of long process and uneven doping, etc., and achieves the effects of low cost, stable product quality and reduction of production links.

Inactive Publication Date: 2013-01-30
HBIS COMPANY LIMITED HANDAN BRANCH COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process has a long process, and it is easy to introduce impurities after repeated grinding, and the doping is uneven.

Method used

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  • Preparation method of MnZn ferrite powder with galvanizing zinc slag and pickling waste liquid as raw materials
  • Preparation method of MnZn ferrite powder with galvanizing zinc slag and pickling waste liquid as raw materials
  • Preparation method of MnZn ferrite powder with galvanizing zinc slag and pickling waste liquid as raw materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: figure 1 Shown, this galvanizing slag and pickling waste liquid are the concrete processing steps of the MnZn ferrite material powder preparation method of raw material:

[0033] 1. Purification of pickling waste liquid:

[0034] (1) Add 180g of steel scrap to each liter of pickling waste solution to neutralize the free acid in the pickling waste and reduce Fe 3+ for Fe 2+ ; Obtain solution A after filtration 1 ;

[0035] (2) Control Solution A 1 temperature at 40°C, to solution A 1 Aqueous ammonia was added to adjust the pH value of the system to 5.5 to obtain solution A 2 ;

[0036] (3) To each liter of solution A 2 Add 1.7ml of 1wt% ammonium fluoride solution to the solution and react for 1.5h to obtain solution A 3 ;

[0037] (4) To the above-mentioned solution A per liter 3 Add 7.6mg of 8173 flocculant in the solution; the precipitate is filtered out by suction filtration, and the obtained filtrate is solution A.

[0038] 2. Leaching and puri...

Embodiment 2

[0048] Example 2: figure 1 Shown, this galvanizing slag and pickling waste liquid are the concrete processing steps of the MnZn ferrite material powder preparation method of raw material:

[0049] 1. Purification of pickling waste liquid:

[0050] (1) Add 140g of steel scrap to each liter of pickling waste solution to neutralize the free acid in the pickling waste and reduce Fe 3+ for Fe 2+ ; Obtain solution A after filtration 1 ;

[0051] (2) Control Solution A 1 temperature at 50°C, to solution A 1 Add ammonia water to adjust the pH value of the system to 5 to obtain solution A 2 ;

[0052] (3) To each liter of solution A 2 Add 2ml of 1wt% ammonium fluoride solution, react for 2h, obtain solution A 3 ;

[0053] (4) To the above-mentioned solution A per liter 3 Add 8 mg of 8173 flocculant in the solution; filter the precipitate by suction filtration, and the obtained filtrate is solution A.

[0054] 2. Leaching and purification of galvanized slag:

[0055] (1) Pu...

Embodiment 3

[0064] Example 3: figure 1 Shown, this galvanizing slag and pickling waste liquid are the concrete processing steps of the MnZn ferrite material powder preparation method of raw material:

[0065] 1. Purification of pickling waste liquid:

[0066] (1) Add 200g of steel scrap to each liter of pickling waste solution to neutralize the free acid in the pickling waste and reduce Fe 3+ for Fe 2+ ; Obtain solution A after filtration 1 ;

[0067] (2) Control Solution A 1 temperature at 30°C, to solution A 1 Add ammonia water to adjust the pH value of the system to 6 to obtain solution A 2 ;

[0068] (3) To each liter of solution A 2 Add 1ml of 1wt% sodium fluoride solution to the solution and react for 1h to obtain solution A 3 ;

[0069] (4) To the above-mentioned solution A per liter 3 Add 6.8mg of polyacrylamide (flocculant) to the solution; remove the precipitate by suction filtration, and the obtained filtrate is solution A.

[0070] 2. Leaching and purification of g...

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Abstract

The invention discloses a preparation method of MnZn ferrite powder with galvanizing zinc slag and pickling waste liquid as raw materials, and the preparation method comprises the process steps: (1) purifying the pickling waste liquid to obtain a solution A; (2) leaching and purifying the galvanizing zinc slag to obtain a solution B; (3) preparing a solution C from the solution A, solution B and a Mn salt according to the molar ratio of Fe2O3 to MnO to ZnO in MnZn ferrite; (4) calculating the theoretical amount of ammonium bicarbonate required for completely precipitating Fe<2+>, Mn<2+> and Zn<2+> in the solution C, and mixing ammonium bicarbonate the amount of which is 1-1.5 times the theoretical amount with ammonia water the amount of which is x times the actual amount of ammonium bicarbonate, wherein 1.5 <= x <= 2.5; (5) introducing the solution C and the solution D in a volume ratio of 1:1 into a reaction kettle for a chemical co-precipitation reaction to obtain slurry; and (6) aging the slurry, oxidizing, washing and drying to obtain a soft magnetic MnZn ferrite powder material. The preparation method is simple and practical; the raw materials have wide sources and low cost; and the obtained product has stable quality.

Description

technical field [0001] The invention relates to a process for treating galvanizing slag and pickling waste liquid in iron and steel plants, in particular to a method for preparing MnZn ferrite powder using galvanizing slag and pickling waste liquid as raw materials. Background technique [0002] At present, the pickling waste liquid in iron and steel plants is generally treated by the Luzner method invented by the Austrians to obtain regenerated hydrochloric acid and iron oxide red. The regenerated hydrochloric acid is returned to the production line, and the red iron oxide is sold as a raw material for pigments and magnetic materials. The galvanized slag from the iron and steel plant is generally purified by fire distillation or sold directly. The added value of the above two products is not high. [0003] Domestic magnetic material factories mainly use iron oxide red, manganese oxide and zinc oxide as raw materials to generate MnZn ferrite magnetic materials through soli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/26C04B35/38C04B35/622
Inventor 许斌胡志刚吝章国李玉银朱文玲徐晓卜二军
Owner HBIS COMPANY LIMITED HANDAN BRANCH COMPANY
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