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Method for preparing Mn-Zn-Ni ferrite magnetic material by using low-grade nickel resource

A technology of nickel ferrite and magnetic materials, which is applied in the fields of magnetism of inorganic materials, manufacturing of inductors/transformers/magnets, electrical components, etc., can solve problems such as high cost, heavy pollution, and low added value of products, and achieve high-efficiency separation and high-efficiency performance effect

Active Publication Date: 2018-01-19
CENT SOUTH UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the disadvantages of high energy consumption, high pollution, high cost, and low added value of products in the fire reduction and wet leaching processes of low-grade nickel resources, the purpose of the present invention is to provide a method for directly preparing low-grade nickel resources. The method of high-performance manganese-zinc-nickel ferrite magnetic materials, compared with the existing method of analyzing pure and high-quality nickel resource raw materials, has an absolute low-cost advantage, and realizes efficient value-added processing of low-grade resources

Method used

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  • Method for preparing Mn-Zn-Ni ferrite magnetic material by using low-grade nickel resource

Examples

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Embodiment 1

[0033] TNi0.9% laterite nickel ore, manganese oxide ore, hematite, and quicklime are mixed together to obtain mixture A. The chemical composition of mixture A (TMn 3.1%, TFe 25.8%, TNi0.3%, TZn 1.2%), Mixture, CaO / SiO in A 2 is 0.05, the mass percentage of the mixture-325 mesh particle size is 95%, and the specific surface area is 2550cm 2 / g, add 0.25% bentonite and 8% moisture to make pellets, then dry, roast the dried samples in a muffle furnace, the roasting temperature is 1300°C, the roasting time is 90min, and the roasted samples are ground after cooling The mass percentage of particle size to -325 mesh is 99.5%. Magnetic separation is carried out in a magnetic field with a magnetic field strength of 800Gs, and the recovery rate of Ni in the process is 99.1%. The obtained magnetic product is mixed with zinc oxide and secondary zinc oxide to obtain a mixture B. In the mixture B, (Mn+Zn+Ni) / Fe is 0.45, Zn / (Mn+Zn+Ni) is 0.2, SiO 2 The content of the compound B is 0.01%, t...

Embodiment 2

[0035] TNi1.2% nickel smelting slag, manganese oxide ore, ferromanganese ore, hematite, goethite, quicklime, and limestone are mixed to obtain mixture A. The chemical composition of mixture A (TMn16.4%, TFe28.8% , TNi0.5%, TZn 1.5%), mixture, CaO / SiO in A 2 is 0.45, the mass percentage of the mixture-325 mesh particle size is 96%, and the specific surface area is 2650cm 2 / g, add 0.25% bentonite and 8% moisture to make pellets, then dry, roast the dried samples in a muffle furnace, the roasting temperature is 1100°C, the roasting time is 120min, and the roasted samples are ground after cooling The mass percentage of particle size up to -325 mesh is 100%, and the magnetic separation is carried out in a magnetic field with a magnetic field strength of 500Gs, and the recovery rate of Ni is 99.5% in the process. The obtained magnetic product is mixed with zinc oxide and secondary zinc oxide to obtain a mixture B. In the mixture B, (Mn+Zn+Ni) / Fe is 0.65, Zn / (Mn+Zn+Ni) is 0.5, and ...

Embodiment 3

[0037] The lateritic nickel ore of TNi0.9%, the nickel sulfide ore of TNi1.7%, manganese oxide ore, ferromanganese ore, hematite, goethite, quicklime, limestone are carried out batching to obtain mixture A, the chemical composition of mixture A (TMn 12.4%, TFe 25.2%, TNi0.6%, TZn0.8%), mixture, CaO / SiO in A 2 is 0.35, the mass percentage of the mixture-325 mesh particle size is 96%, and the specific surface area is 2650cm 2 / g, add 0.25% bentonite and 8% moisture to make pellets, then dry, roast the dried samples in a muffle furnace, the roasting temperature is 1250°C, the roasting time is 90min, and the roasted samples are ground after cooling The mass percentage of particle size up to -325 mesh is 100%, and the magnetic separation is carried out in a magnetic field with a magnetic field strength of 750Gs, and the recovery rate of Ni is 98.8% in the process. The obtained magnetic product is mixed with zinc oxide and secondary zinc oxide to obtain a mixture B. In the mixture ...

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Abstract

The invention discloses a method for preparing a Mn-Zn-Ni ferrite magnetic material by using a low-grade nickel resource. The method comprises the following steps: performing fine grinding on a low-grade nickel resource, a manganese source, an iron source, a calcareous flux and a binder to prepare agglomerate; drying the agglomerate, performing primary roasting, and performing fine grinding and magnetic separating on the roasted agglomerate to obtain magnetic concentrate; mixing the magnetic concentrate and a zinc source, compacting the materials, and performing secondary roasting on a mouldedmaterial to obtain the Mn-Zn-Ni ferrite magnetic material. Compared with a traditional magnetic method that a pure substance is roasted to prepare the manganese ferrite, the method can directly employ mineral or secondary resource with large reserves as a raw material, the purity of the Mn-Zn-Ni ferrite is high, the magnetic property is good, and the method has the advantages of wide raw materialsource, simple process, low cost, and easy realization of industrial production.

Description

technical field [0001] The invention relates to a method for recovering low-grade nickel, in particular to a method for preparing high-performance manganese-zinc-nickel ferrite magnetic materials by using low-grade nickel resource raw materials through de-doping, and belongs to the field of metal resource recovery and material preparation . Background technique [0002] Nickel is an important strategic metal. It has become a key material for the development of modern aviation industry and national defense industry. It is an indispensable metal in the high-tech field and the establishment of a high-level material and cultural system for modern human beings. It plays a pivotal role in the national economy. [0003] Laterite nickel ore is formed by long-term weathering and leaching metamorphism of nickel-bearing peridotite in tropical or subtropical regions. It is a loose clay-like ore composed of iron, aluminum, silicon and other hydrous oxides. Due to the oxidation of iron ,...

Claims

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Application Information

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IPC IPC(8): C04B35/38C04B35/626C04B35/622H01F1/36H01F41/02
Inventor 张元波姜涛刘兵兵李光辉苏子键彭志伟饶明军范晓慧黄柱成张鑫王娟路漫漫古佛全韩本来王嘉涂义康
Owner CENT SOUTH UNIV
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