Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of method for preparing ferromanganese spinel material

A spinel, ferromanganese technology, applied in chemical instruments and methods, iron compounds, inorganic chemistry, etc., can solve the problems of long roasting time and high roasting temperature, and achieve short roasting time, reduce reduction roasting temperature, and excellent magnetic properties. Effect

Active Publication Date: 2017-12-15
CENT SOUTH UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main disadvantages of the high-temperature solid-state reaction method are high calcination temperature (about 1500 ℃) and long calcination time (tens of hours).

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of method for preparing ferromanganese spinel material
  • A kind of method for preparing ferromanganese spinel material
  • A kind of method for preparing ferromanganese spinel material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] MnO 2 with Fe 2 o 3 Dosing according to the mass ratio of 0.5, where MnO 2 with Fe 2 o 3 The mass percentage of -325 mesh particle size is 99.5%, then add 0.5% CMC and 8% moisture to pelletize, then dry, and dry the sample in CO / (CO+CO 2 ) in an atmosphere with a concentration of 1% by volume from room temperature to 1300°C at a rate of 20°C / min, roasting for 3h, and then in N 2 The atmosphere was lowered to room temperature at a rate of 20°C / min, and then the roasted sample was ground until the -325 mesh size accounted for 100% by mass, and the obtained roasted product was spherical ferromanganese spinel material. The hysteresis loops of the samples obtained under this condition are as follows figure 1 As shown, the SEM picture of the particle morphology is as follows Figure 6 shown. Depend on Figure 6 It can be seen that the ferromanganese spinel particles have a spherical structure.

Embodiment 2

[0033] MnO 2with Fe 2 o 3 Dosing according to the mass ratio of 0.6, where MnO 2 with Fe 2 o 3 -325 mesh particle size accounts for 100% by mass, then add 0.5% humic acid and 8% moisture to make pellets, then dry, and dry the sample in (H 2 +CO) / (H 2 +CO+CO 2 ) volume percent concentration is 18.5%, H 2 / CO volume percent concentration of 20% in the atmosphere from room temperature at a rate of 20 ° C / min to 800 ° C, roasted for 10 h, and then in an Ar atmosphere at a rate of 20 ° C / min to room temperature, and then the roasted sample was ground The mass percent content of the particle size as fine as -325 mesh is 100%, and the obtained roasting product is coral reef-like ferromanganese spinel material. The hysteresis loops of the samples obtained under this condition are as follows figure 2 shown. The SEM pictures of the particle morphology are as follows Figure 7 shown. Depend on Figure 7 It can be seen that the ferromanganese spinel particles have a cora...

Embodiment 3

[0035] MnO 2 with Fe 2 o 3 Dosing according to the mass ratio of 0.55, where MnO 2 with Fe 2 o 3 -325 order particle size accounts for mass percent and composition is 100%, then add 0.5% CMC and 7% moisture to pelletize, then dry, the sample after drying is in (H 2 +CO) / (H 2 +CO+CO 2 ) volume percent concentration is 10%, H 2 / CO volume percent concentration of 10% in the atmosphere from room temperature at a rate of 20 ° C / min to 1200 ° C, roasted for 5 hours, and then in an Ar atmosphere at a rate of 20 ° C / min to room temperature, and then the roasted sample was ground The mass percent content of the particle size as fine as -325 mesh is 100%, and the obtained roasted product is spherical ferromanganese spinel material. The hysteresis loops of the samples obtained under this condition are as follows image 3 shown.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for preparing a jakobsite material. The method includes the steps that after manganese dioxide powder, iron trioxide powder, a binder and water are mixed to be uniform, briquetting and drying are carried out, obtained dry blocks are put in the H2, CO and CO2 mixed atmosphere, heating calcining and cooling are carried out, and the jakobsite material is obtained. According to the method, by controlling the calcining atmosphere and other calcining conditions, the calcining temperature can be greatly reduced, the calcining time can be greatly shortened, the jakobsite magnetic material with excellent magnetism can be obtained, the method has the advantages of being wide in raw material source, simple in process, low in energy consumption and low in cost, and industrial production is easy to achieve.

Description

technical field [0001] The invention relates to a method for preparing ferromanganese spinel materials, in particular to a method for preparing ferromanganese spinel materials by roasting manganese dioxide and ferric oxide as raw materials through reducing atmosphere, which belongs to the solid phase reaction method The field of preparing functional materials. Background technique [0002] Ferrite-manganese-based spinel ferrite is a ferrite material with a wide range of uses, many varieties, large quantities and high output value. Soft magnetic materials are mainly used as various inductive components, such as filter cores, transformer cores, wireless electromagnetic cores, and tape recording and video heads, etc., and are also key materials for magnetic recording components. Hard magnetic materials are mainly used in recorders, pickups, speakers, and magnetic cores of various instruments in telecommunication devices. [0003] High-temperature solid-phase synthesis is the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/00
CPCC01G49/0072C01P2002/30C01P2002/32C01P2004/03C01P2004/32C01P2004/61C01P2004/62C01P2006/42
Inventor 张元波刘兵兵李光辉姜涛苏子键彭志伟范晓慧黄柱成郭宇峰其他发明人请求不公开姓名
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com