Method for preparing manganese-zinc ferrites through carrying out acid dipping on low-grade manganese ores and carrying out ferromanganese remaining and impurity removal

A low-grade manganese ore and manganese-zinc ferrite technology, applied in the field of manganese-zinc ferrite preparation, can solve the problems of increasing production costs, increasing production costs, unfavorable scale production, etc., and achieve reduced emissions, less equipment, and raw material costs low effect

Inactive Publication Date: 2012-11-14
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The weak point of this method: (1) this method is raw material with chemical reagent, has increased production cost
The equipment required for segmental cooling is expensive, which further increases the production cost
(3) Staged heating and staged cooling lead to a long time for a single production process, which is not conducive to large-scale production

Method used

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  • Method for preparing manganese-zinc ferrites through carrying out acid dipping on low-grade manganese ores and carrying out ferromanganese remaining and impurity removal
  • Method for preparing manganese-zinc ferrites through carrying out acid dipping on low-grade manganese ores and carrying out ferromanganese remaining and impurity removal
  • Method for preparing manganese-zinc ferrites through carrying out acid dipping on low-grade manganese ores and carrying out ferromanganese remaining and impurity removal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing manganese-zinc ferrite by acid leaching of low-grade manganese ore and ferromanganese preservation for impurity removal, the specific steps are as follows:

[0026] (1) extract and prepare manganese sulfate and ferric sulfate solution

[0027] Using low-grade manganese ore as raw material, first crush the low-grade manganese ore through a pulverizer, and then sieve it with a sieve with an aperture of 0.074mm. For the sieved manganese ore powder, the mass (g) of the manganese ore powder: the volume (mL) ratio of the sulfuric acid leaching agent with a mass concentration of 30% is a ratio of 1: 3, the manganese ore powder and the sulfuric acid leaching agent are added In the first reaction vessel, heat it with a 90°C water bath, stir and leaching with a stirrer for 2.5 hours, stop heating and stirring, cool to room temperature, and filter for the first time with a filter to collect the filtrate and filter residue respectively. The filter residue is...

Embodiment 2

[0034] A method for preparing manganese-zinc ferrite by acid leaching of low-grade manganese ore and ferromanganese preservation for impurity removal, the specific steps are as follows:

[0035] In the 1st (1) step: the mass concentration of sulfuric acid leaching agent is 20%, the quality (g) of manganese ore powder: the volume (mL) ratio of sulfuric acid leaching agent is 1: 2, and the water bath temperature is 80 ℃, stirring and leaching Take the time to be 2.0h, adjust the pH value of the filtrate collected by the first filtration with sodium hydroxide solution to be 5.30, the quality (g) of reduced iron powder: the volume (mL) ratio of the filtrate collected by the first filtration is 1: 8. The stirring time is 20 min, the mass (g) of sodium fluoride: the volume (mL) ratio of the filtrate collected by the second filtration is 1:8, and the stirring time is 10 min.

[0036] In step (2): NH 4 HCO 3 The mass (g): the volume (mL) of the mixed solution of manganese sulfate an...

Embodiment 3

[0040] A method for preparing manganese-zinc ferrite by acid leaching of low-grade manganese ore and ferromanganese preservation for impurity removal, the specific steps are as follows:

[0041] In the 1st (1) step: the mass concentration of sulfuric acid leaching agent is 40%, the quality (g) of manganese ore powder: the volume (mL) ratio of sulfuric acid leaching agent is 1: 4, and the water bath temperature is 100 ℃, stirring and leaching Take time as 3.0h, adjust the pH value of the filtrate collected by filtration for the first time with sodium hydroxide solution to be 5.34, the quality (g) of reduced iron powder: the volume (mL) ratio of the filtrate collected by filtration for the first time is 1: 10. The stirring time was 40 min, the mass (g) of sodium fluoride: the volume (mL) ratio of the filtrate collected by the second filtration was 1:10, and the stirring time was 30 min.

[0042] In step (2): NH 4 HCO 3 The mass (g): the volume (mL) of the mixed solution of man...

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Abstract

The invention discloses a method for preparing manganese-zinc ferrites through carrying out acid dipping on low-grade manganese ores and carrying out ferromanganese remaining and impurity removal, relating to a preparation method for magnetic materials. The method disclosed by the invention is implemented by taking low-grade manganese ores as raw materials through the steps of carrying out acid leaching on the raw materials; simultaneously adjusting the pH value of the obtained product and adding iron powder and an impurity removal reagent into the obtained product; after the impurity removal is completed, adding ferric sulfate and zinc sulfate into the obtained product so as to obtain a solution containing manganese, zinc and iron; sequentially carrying out precipitation and aging on the obtained solution so as to obtain a precursor of a manganese-zinc ferrite; and carrying out sintering on the precursor so as to obtain a finished manganese-zinc ferrite product. According to the invention, through fully using manganese and iron in low-grade manganese ores, the comprehensive utilization of resources is realized, so that the method is low in price of raw materials, simple in process steps and low in production cost, and basically achieves an effect of zero emission in the technological process, therefore, the method completely conforms to the requirements of energy conservation and emission reduction; and a soft magnetic material manganese-zinc ferrite prepared by using the method disclosed by the invention has excellent magnetic properties. The method disclosed by the invention can be widely used for preparing various magnetic materials, and magnetic materials prepared by using the method disclosed by the invention can be widely used as wave-absorbing materials in the electronic industry and military fields.

Description

technical field [0001] The invention belongs to a method for preparing soft magnetic materials, in particular to a method for preparing manganese zinc ferrite. Background technique [0002] Since 2000, Xiushan County, Chongqing City has vigorously developed the manganese industry, specifically involving the mining of manganese ore and the processing of electrolytic manganese metal. Over the years, due to weak technical force and extensive management methods, there has been a serious phenomenon of "mining the rich and abandoning the poor, easy mining and difficult disposal" in the mining area, resulting in a large number of low-grade manganese ore being abandoned. A large number of these low-grade manganese ores are piled up in the mining area. On the one hand, it increases the cost of land acquisition and site disposal of the enterprise, and increases the production cost of the enterprise; Infiltration, entering the surface and groundwater, will also affect groundwater reso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622
Inventor 徐龙君谢超谢太平刘成伦
Owner CHONGQING UNIV
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