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A method for preparing in-situ strengthened spinel composite ferrite material

A spinel-type, in-situ strengthening technology, applied in chemical instruments and methods, iron compounds, magnetic properties of inorganic materials, etc., can solve the problems affecting the magnetic properties of composite ferrite products, easy entry of impurity elements, etc., and achieve magnetic properties. Strengthening, beneficial to industrial production, low cost of raw materials

Active Publication Date: 2022-02-18
ZHENGZHOU UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the difficulties and problems that impurity elements easily enter the crystal lattice of spinel-type composite ferrite in the process of preparing spinel-type composite ferrite materials from mineral raw materials in the prior art, thereby affecting the magnetic properties of composite ferrite products , the object of the present invention is to provide a method of using siliceous additives in the process of synthesizing spinel-type composite ferrite materials using metal mineral raw materials to realize in-situ regulation of the quantity of phase and liquid phase generation, strengthen the migration of impurity elements, and obtain Method for high-purity lattice, high-performance spinel-type composite ferrite products

Method used

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  • A method for preparing in-situ strengthened spinel composite ferrite material

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Embodiment 1

[0037] Manganese carbonate containing 15% manganese, hematite containing 62% iron, zinc calcined sand containing 45% zinc, cobalt concentrate containing 20% ​​cobalt, and copper slag containing 2% copper are used as raw materials for batching. The molar ratio of (Mn+Zn+Co+Cu) / Fe in the mixture is 2.5, the molar ratio of (Zn+Cu) / (Mn+Zn+Co+Cu) is 0.1, SiO 2 / (MnO 2 +Fe 2 o 3 ) with a molar ratio of 0.15, and the above materials are all finely ground to less than 200 meshes, accounting for 95% by mass, roasted at 1200°C for 30 minutes and then cooled in the air; the cooled materials are finely ground to less than The mass percentage of 325 mesh particle size is 100%, and the silica that is less than 400 mesh particle size of 100% is mixed to obtain the secondary mixture, and the chemical composition of the secondary mixture satisfies ( CaO+MgO+Al 2 o 3 +K 2 O+Na 2 O) / SiO 2 The molar ratio of SiO is 0.65, and SiO 2 / (MnO 2 +Fe 2 o 3 ) with a molar ratio of 0.25, and th...

Embodiment 2

[0039] Manganese oxide ore containing 30% manganese, magnetite containing 65% iron, purified cobalt slag containing 50% zinc, cobalt waste containing 18% cobalt, and copper concentrate containing 8% copper are used as raw materials for batching. The molar ratio of (Mn+Zn+Co+Cu) / Fe in the mixture is 0.2, the molar ratio of (Zn+Cu) / (Mn+Zn+Co+Cu) is 0.2, SiO 2 / (MnO 2 +Fe 2 o 3 ) with a molar ratio of 0.1, and the above materials are all finely ground to less than 200 meshes, accounting for 95% by mass, roasted at 1000°C for 90 minutes and then cooled in air; the cooled materials are finely ground to less than The mass percentage of 325 mesh particle size is 100%, and the secondary mixture is obtained by adding silica with a mass percentage of less than 400 mesh particle size of 100%, and the chemical composition of the secondary mixture satisfies (CaO+MgO+ al 2 o 3 +K 2 O+Na 2 O) / SiO 2 The molar ratio of SiO is 0.2, and SiO 2 / (MnO 2 +Fe 2 o 3 ) with a molar ratio of...

Embodiment 3

[0041] Ferromanganese ore containing 18% manganese, hematite containing 64% iron, purified cobalt slag containing 48% zinc, cobalt waste containing 15% cobalt, and copper slag containing 1.2% copper are used as raw materials for batching, and the primary mixing is controlled The molar ratio of (Mn+Zn+Co+Cu) / Fe in the material is 0.5, the molar ratio of (Zn+Cu) / (Mn+Zn+Co+Cu) is 0.1, SiO 2 / (MnO 2 +Fe 2 o 3 ) with a molar ratio of 0.15, and the above materials are all finely ground to less than 200 meshes, accounting for 100% by mass, roasted at 1050°C for 85 minutes and then cooled in air; the cooled materials are finely ground to less than The mass percentage of 325 mesh particle size is 100%, and the silica of -400 mesh particle size of 100% is added to obtain the secondary mixture, and the chemical composition of the secondary mixture satisfies (CaO+MgO+ Al 2 o 3 +K 2 O+Na 2 O) / SiO 2 The molar ratio of SiO is 0.2, and SiO 2 / (MnO 2 +Fe 2 o 3 ) at a molar ratio of...

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Abstract

The invention discloses a method for preparing an in-situ strengthened spinel-type composite ferrite material. The method comprises finely grinding and batching manganese-containing materials, iron-containing materials, zinc-containing materials, cobalt-containing materials and copper-containing materials, Carry out one-stage roasting and cooling, and then add siliceous additives to the second-stage roasting after the first-stage roasting material is finely ground to control the phase composition and element migration during the roasting process, and obtain the roasted material after phase reconstruction; the second-stage roasting The material undergoes two stages of fine grinding and magnetic separation to obtain a spinel-type composite ferrite material with a pure crystal lattice, low impurity content, and good magnetic properties. This method is especially suitable for materials where various valuable metal components are closely symbiotic To prepare multi-component composite ferrite powder materials.

Description

technical field [0001] The invention relates to a method for preparing in-situ strengthened spinel-type composite ferrite materials, in particular to a method of roasting mineral raw materials containing manganese, iron, zinc, cobalt and copper with a small amount of cheap siliceous additives. The method for realizing directional conversion and synchronous recovery of valuable components in low-quality valuable metal resources and simultaneously preparing soft magnetic materials with excellent performance belongs to the technical field of high-value processing of low-quality mineral raw materials. Background technique [0002] Spinel-type composite ferrite is a metal composite ferrite formed by two or more metal oxides. The molecular formula of composite ferrite is AB 2 o 4 , where A is a divalent metal and B is a trivalent metal. Spinel-type composite ferrite has good properties such as wave absorption, catalysis, magnetism, and adsorption properties. It is widely used in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/00H01F1/36
CPCC01G49/0072C01G49/0063H01F1/36C01P2006/42
Inventor 刘兵兵韩桂洪黄艳芳杨淑珍苏胜鹏王文娟薛毓斌
Owner ZHENGZHOU UNIV
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