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Method for preparing MnZn ferrite material powder from acid washing waste liquid and galvanized zinc slag

A technology for pickling waste liquid and ferrite, which is applied in the field of preparing soft magnetic MnZn ferrite powder, can solve the problems of reducing the particle size of magnetic materials, difficult to remove impurities, long process flow, etc., and achieves uniform composition and fine particle size. , the effect of simple process

Inactive Publication Date: 2012-11-21
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 is long and requires repeated grinding to reduce the particle size of the magnetic material. The main problems are that the impurities are not easy to remove and the uniformity is poor.

Method used

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  • Method for preparing MnZn ferrite material powder from acid washing waste liquid and galvanized zinc slag
  • Method for preparing MnZn ferrite material powder from acid washing waste liquid and galvanized zinc slag
  • Method for preparing MnZn ferrite material powder from acid washing waste liquid and galvanized zinc slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: figure 1 Shown, the concrete process steps of the method for preparing soft magnetic MnZn ferrite material powder by utilizing pickling waste liquid of iron and steel plant and galvanized zinc slag are:

[0028] (1) Take 35g of galvanized zinc slag and dissolve it in 1L of steel plant pickling waste solution. During the dissolution process, use hydrochloric acid to adjust the pH value of the solution to 1.5, and control the system temperature at 40°C. After the dissolution is complete, a mixed solution is obtained.

[0029] (2) Adjust the pH value of the mixed solution to 5 with ammonia water, then add 1.5ml / L of 1wt% ammonium fluoride solution into the mixed solution; react for 1.5h to obtain a reaction solution.

[0030] (3) Add 7.2 mg of 8173 flocculant to each liter of reaction solution; separate the filter cake with a filter press and discard, and the resulting filtrate is the primary solution.

[0031] (4) Fe in the primary solution and manganese chlor...

Embodiment 2

[0036] Example 2: figure 1 As shown, the concrete process steps of the method for preparing soft magnetic MnZn ferrite material powder by utilizing pickling waste liquid and galvanizing slag are:

[0037] (1) Take 32g of galvanized zinc slag and dissolve it in 1L of steel plant pickling waste solution. During the dissolution process, use hydrochloric acid to adjust the pH value of the solution to 1, control the system temperature at 50°C, and obtain a mixed solution after complete dissolution.

[0038] (2) Adjust the pH value of the mixed solution to 3 with ammonia water, then take 1ml / L of 1wt% ammonium fluoride solution and add it to the mixed solution; react for 1 hour to obtain a reaction solution.

[0039] (3) Add 6.8 mg of 8173 flocculant to each liter of reaction liquid; use a filter press to separate the filter cake and discard it, and the resulting filtrate is the primary solution.

[0040] (4) Fe in the primary solution and manganese chloride according to the ferrit...

Embodiment 3

[0045] Example 3: figure 1 As shown, the concrete process steps of the method for preparing soft magnetic MnZn ferrite material powder by utilizing pickling waste liquid and galvanizing slag are:

[0046] (1) Take 38g of galvanized zinc slag and dissolve it in 1L of steel plant pickling waste solution. During the dissolution process, use hydrochloric acid to adjust the pH value of the solution to 2, control the system temperature at 30°C, and obtain a mixed solution after complete dissolution.

[0047] (2) Adjust the pH value of the mixed solution to 6 with ammonia water, then add 2ml / L of 1wt% sodium fluoride solution into the mixed solution; react for 2 hours to obtain a reaction solution.

[0048] (3) Add 8 mg of polyacrylamide to each liter of reaction solution; separate the filter cake with a filter press and discard, and the obtained filtrate is the primary solution.

[0049] (4) Fe in the primary solution and manganese chloride according to the ferrite composition (sof...

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Abstract

The invention discloses a method for preparing MnZn ferrite material powder from acid washing waste liquid and galvanized zinc slag. The method comprises the following steps of: (1) placing the galvanized zinc slag into the acid washing waste liquid to dissolve to obtain mixed solution; (2) adjusting the pH value of the mixed solution to 3 to 6 by using ammonia water, adding fluoride and reacting to obtain reaction solution; (3) adding a flocculating agent into the reaction solution and filtering out precipitate in the mixed solution by a suction filtration method, wherein the filtrate is primary solution; (4) preparing precipitate solution from the primary solution and manganese chloride according to the mole ratio of Fe2O3 to MnO to ZnO of the ferrite components and preparing precipitator solution from ammonium bicarbonate and ammonia water; (5) allowing the precipitate solution and the precipitator solution to enter a reaction kettle to react to obtain slurry; (6) ageing the slurry obtained from the complete reaction; and (7) oxidizing, washing, filtering and drying the aged slurry to obtain MnZn ferrite material powder. The soft magnetic MnZn ferrite material powder has fine granularity, uniform and stable components and high magnetic property.

Description

technical field [0001] The invention relates to a process for treating pickling waste liquid and galvanizing slag in iron and steel plants, in particular to a method for preparing soft magnetic MnZn ferrite powder by using pickling waste liquid and galvanizing slag. Background technique [0002] At present, the pickling waste liquid in iron and steel plants is generally treated by the Luzner method, and the waste liquid is sprayed and roasted to obtain regenerated hydrochloric acid and iron oxide red. Regenerated hydrochloric acid is returned to the production line, and iron oxide red as a by-product can be used as a primary raw material for pigments and magnetic materials. However, due to the poor stability of the production process, the quality stability of iron red is poor, and the proportion that can be directly used as raw materials for advanced magnetic materials is relatively low. Galvanized zinc slag from iron and steel plants is generally treated as waste slag. Most...

Claims

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Application Information

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