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

Method for extracting lithium carbonate from low-grade lithium mica

A lepidolite, low-grade technology, applied in the direction of lithium carbonate;/acid carbonate, etc., can solve the problem of incapable of large-scale industrial production of lithium, to reduce hydrofluoric acid mist, eliminate dust problems, The effect of reducing energy consumption

Active Publication Date: 2017-12-15
福州华复新能源科技有限公司
View PDF6 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to, aiming at the defect in the prior art that cannot be scaled up for industrial production of lithium from low-grade lepidolite ore, a method for obtaining lithium carbonate from low-grade lepidolite is proposed, which can be used on a large scale Industrial production of lithium carbonate from low-grade lepidolite with high overall recovery

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
  • Method for extracting lithium carbonate from low-grade lithium mica

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Take 40 kg of low-grade lepidolite, 12 kg of potassium sulfate, 8 kg of calcium sulfate, 6 kg of cement and 4 kg of loess, and press 7 kg of water to form a block of 240 × 120 × 120 mm Bricks, a total of 10 bricks with a weight of 7.7 kg were obtained. After 24 hours of natural air drying, they were stacked on a 3.6 x 3.6 m brick truck to form a column shape of 240 x 1800 mm (the rest were brick embryos for construction), and one was pushed every 120 minutes. Brick embryo car, the highest temperature is 1050 ℃, after 60 hours out of the oven, the columnar shape remains good, take a brick from the upper, middle and lower, break it, take a comprehensive sample of 2 kg, ball mill to 200 mesh, and mix it according to the mass ratio of solid to liquid ratio of 1:1 The crushed clinker was leached in two-stage countercurrent to obtain leaching solution and leaching slag. The leaching temperature was 60°C and the leaching time was 30 minutes. The Li in the leaching solution 2 T...

Embodiment 2

[0055] Take 40 kg of low-grade lepidolite, 12 kg of potassium sulfate, 8 kg of calcium sulfate, 6 kg of cement and 4 kg of loess, and press 7 kg into a brick of 240×120×120 mm. , a total of 10 bricks weighing 7.7 kg were obtained. After 24 hours of natural air-drying, they were stacked on a 3.6×3.6-meter brick truck to form a column shape of 240×1800mm (the rest were brick embryos for construction), and a brick was pushed every 120 minutes. Embryo car, control the maximum temperature of the material at 950°C, and leave the oven after 60 hours. The columnar shape remains good. Take a brick from the upper, middle and lower bricks, break it, take a comprehensive sample of 2 kg, and ball mill it to 200 mesh. According to the solid-liquid ratio of 1:1 The mass ratio of the crushed clinker is obtained by two-stage countercurrent leaching to obtain leaching liquid and leaching residue. The leaching temperature is 60°C, the leaching time is 30 minutes, and the Li in the leaching liquid...

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 belongs to the technical field of lithium industry, and particularly relates to a method for extracting lithium carbonate from low-grade lithium mica. The method comprises the steps of mixing the low-grade lithium mica with a calcination agent, a fluorine-fixing acid-removing agent, a molding hardening agent and a high-temperature plasticizer, adopting an industrial block molding machine for building materials and the like to mold the mixed materials, putting the molded materials into a tunnel kiln for calcination, and then obtaining the lithium carbonate product after ball milling, leaching, purifying and impurity removal, carbonation and lithium settling, washing and drying. By means of the method, the lithium carbonate can be obtained from the low-grade lithium mica in a large-scale and industrialized mode, wherein the overall recovery rate is high.

Description

technical field [0001] The invention belongs to the technical field of lithium industry, in particular to a method for obtaining lithium carbonate from low-grade lepidolite. Background technique [0002] Lithium resources are basically divided into lithium brine, spodumene and lepidolite. Lithium brine basically relies on natural drying and concentration to extract lithium, and spodumene basically uses sulfuric acid roasting or limestone to extract lithium; and the lepidolite concentrates that can be mass-produced at present are all low-grade, namely Li 2 The O content is 2.5-3.5%, which belongs to the low-grade and difficult-to-handle lithium ore resources. It is also rich in potassium, rubidium and cesium. How to develop and utilize low-grade lepidolite is of great significance to the development of my country's lithium industry. [0003] At present, the method of roasting sodium sulfate, calcium chloride and calcium carbonate to obtain lithium carbonate is generally used...

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 Applications(China)
IPC IPC(8): C01D15/08
CPCC01D15/08
Inventor 许长威倪振松许长志胡东山
Owner 福州华复新能源科技有限公司
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