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

A kind of synthetic method of using iron tailings as raw material to prepare bismuth-doped lithium ferrous silicate cathode material

A technology of lithium ferrous silicate and cathode material, applied in silicate, alkali metal silicate, battery electrodes, etc., can solve the problem of not achieving full utilization of iron tailings, low economic benefits, and low added value of products, etc. question

Inactive Publication Date: 2020-04-21
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although iron tailings have been used in construction materials to a certain extent, the iron ore processed by this method only accounts for 12.4% of the national annual iron tailings processing, but it is far from reaching the full utilization of iron tailings. To develop a new way to utilize iron tailings. In addition, as a building material, its product has low added value and low economic benefits.

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 synthetic method of using iron tailings as raw material to prepare bismuth-doped lithium ferrous silicate cathode material

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] The iron tailings are ball milled to below 400 mesh, and the mass ratio iron tailings: caustic soda = 1:4 is used for batching and mixing. The obtained mixture is heated and activated in a microwave oven. The power of the microwave oven is adjusted to 1500MHz, the temperature is 810°C, and the heating time After the mixture is activated, quickly pour it into water according to the mass ratio of mixture: water = 1:25, put the above mixed solution in a silicone oil bath at 160°C, stir and react for 6 hours, filter after the reaction, and the obtained filtrate is Sodium silicate solution; by molar ratio SiO 3 2- : Fe 2+ = 1:1, add ferric nitrite to the sodium silicate solution, then fully stir and react in a silicone oil bath at 120°C for 4 hours; And dry at 100°C for 8 hours to obtain a precipitate; then molar ratio of Fe 2+ : Li + : Bi 3+ =1:2:0.01, mix lithium oxide and bismuth trioxide into the sediment, and after mixing thoroughly, put the mixture in a muffle f...

example 2

[0026] The iron tailings are ball milled to below 400 mesh, and the mass ratio of iron tailings: caustic soda = 1:3 is used for batching and mixing. The obtained mixture is heated and activated in a microwave oven. The power of the microwave oven is adjusted to 2000MHz, and the temperature is 850°C. After the mixture is activated, quickly pour it into water according to the mass ratio of mixture: water = 1:25, put the above mixed solution in a silicone oil bath at 160°C, stir and react for 6 hours, filter after the reaction, and the obtained filtrate is Sodium silicate solution; by molar ratio SiO 3 2- : Fe 2+ = 1:1, add ferric nitrite to the sodium silicate solution, then fully stir and react in a silicone oil bath at 120°C for 4 hours; And dry at 100°C for 8 hours to obtain a precipitate; then molar ratio of Fe 2+ : Li + : Bi 3+ =1:2:0.015, mix lithium oxide and bismuth trioxide into the sediment, after mixing thoroughly, put the mixture in a muffle furnace for calcin...

example 3

[0028] Ball mill the iron tailings to less than 400 mesh, and carry out batching and mixing according to the mass ratio of iron tailings: caustic soda = 1:3. The obtained mixture is heated and activated in a microwave oven. The power of the microwave oven is adjusted to 2500MHz, and the temperature is 850°C. After the mixture is activated, quickly pour it into water according to the mass ratio of mixture: water = 1:25, place the above mixture in a 160°C methyl silicone oil bath, stir and react for 6 hours, filter after the reaction, and obtain the filtrate It is sodium silicate solution; by molar ratio SiO 32- : Fe 2+ =1:1, add ferric nitrite to the sodium silicate solution, then fully stir and react in a silicone oil bath at 120°C for 4 hours; and dried at 100°C for 7 hours to obtain a precipitate; then molar ratio of Fe 2+ : Li + : Bi 3+ =1:2:0.02, mix lithium oxide and bismuth trioxide into the sediment, after mixing thoroughly, place the mixture in a muffle furnace f...

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a synthesis method for preparing a bismuth-doped lithium silicate positive electrode material by taking iron tailing as a raw material. The synthesis method comprises the steps of firstly, preparing a sodium silicate solution by taking the iron tailing as the raw material; secondly, adding ferrous nitrate into the sodium silicate solution to obtain a ferrous nitrate precipitant; thirdly, mixing lithium oxide and Fe2O3 with the precipitant; and finally, performing calcination and cooling to obtain a bismuth-doped lithium silicate sample. The lithium silicate system material is an important lithium battery positive electrode material, and the method has very important significance to integrated utilization of the iron tailing, environmental protection, and promotionon development of high and new technology.

Description

technical field [0001] The invention relates to a synthesis method for preparing a bismuth-doped lithium ferrous silicate cathode material by using iron tailings as a raw material, and belongs to the field of inorganic non-metallic materials. Background technique [0002] The grade of mineral resources in our country is low, and they need to be processed before use. The solid waste left after the processing is called tailings. The solid waste left after the iron ore passes through the specific separation process of the iron beneficiation plant is called iron tailings. As the main source of iron ore, iron ore has been increasing in demand with the continuous growth of my country's iron and steel industry in recent decades. Coupled with the increase in the price of iron ore concentrates, the intensity of iron ore mining has increased, and the stockpiles of iron tailings have risen sharply. The stockpiles of iron tailings in my country once reached more than one billion tons ...

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): H01M4/58H01M10/0525C01B33/32
CPCY02E60/10
Inventor 瞿云华
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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