Unlock instant, AI-driven research and patent intelligence for your innovation.

A method of extracting lithium from lithium ore

A technology for extracting lithium and lithium ore, applied in the field of metallurgy, can solve the problems of difficulty in processing spodumene and lepidolite ore at the same time, corrosion of equipment by chlorination roasting method, poor adaptability of ore, etc., and achieves strong adaptability and lithium extraction. The effect of high rate and few steps

Active Publication Date: 2020-10-02
UNIV OF SCI & TECH BEIJING
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current lithium extraction methods such as direct leaching, chlorination roasting, and pressure cooking are not very adaptable to ore, that is, the same method is only suitable for spodumene or lepidolite ore, and it is difficult to meet the requirements of simultaneous processing of spodumene and lithium. Mica Ore Requirements
In addition, the direct leaching method has a low leaching rate, and the chlorination roasting method has the problem of equipment corrosion

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 method of extracting lithium from lithium ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Mix 100g of lepidolite with calcium oxide and pulverized coal evenly, wherein the weight ratio of calcium oxide to lepidolite is 0.25:1, the weight ratio of pulverized coal to lepidolite is 0.05:1, and react at a temperature of 1300°C 1h.

[0021] (2) Pour the melt that has been reacted at high temperature into water for water quenching, and obtain water quenching slag through rapid cooling.

[0022] (3) Finely grind the water-quenched slag to obtain finely ground slag.

[0023] (4) Add the fine grinding slag to sulfuric acid solution for leaching, the liquid-solid ratio of leaching is 4:1, the acid concentration is 100g / L, the leaching temperature is 90°C, and the leaching time is 0.5h. During the leaching process, the lithium leaching rate reaches 98.9%. After the leaching is completed, a lithium-containing solution is obtained by liquid-solid separation.

[0024] (5) adding sodium carbonate to the lithium-containing solution to adjust the alkalinity to carry o...

Embodiment 2

[0026] (1) Mix 100g of lepidolite with calcium oxide and pulverized coal evenly, wherein the weight ratio of calcium oxide to lepidolite is 0.1:1, the weight ratio of pulverized coal to lepidolite is 0.1:1, and react at a temperature of 1400°C 2h.

[0027] (2) Pour the melt that has been reacted at high temperature into water for water quenching, and obtain water quenching slag through rapid cooling.

[0028] (3) Finely grind the water-quenched slag to obtain finely ground slag.

[0029] (4) Add the fine grinding residue to hydrochloric acid solution for leaching, the liquid-solid ratio of leaching is 6:1, the acid concentration is 100g / L, the leaching temperature is 60°C, and the leaching time is 3h. Lithium leaching rate reached 97.9% in the leaching process. After the leaching is completed, a lithium-containing solution is obtained by liquid-solid separation.

[0030] (5) adding sodium phosphate to the lithium-containing solution to adjust the alkalinity to carry out pre...

Embodiment 3

[0032] (1) Mix 100g of lepidolite with calcium oxide and pulverized coal evenly, wherein the weight ratio of calcium oxide to lepidolite is 0.4:1, the weight ratio of pulverized coal to lepidolite is 0.15:1, and react at a temperature of 1500°C 1h.

[0033] (2) Pour the melt that has been reacted at high temperature into water for water quenching, and obtain water quenching slag through rapid cooling.

[0034] (3) Finely grind the water-quenched slag to obtain finely ground slag.

[0035] (4) Add the fine grinding slag to nitric acid solution for leaching, the liquid-solid ratio of leaching is 8:1, the acid concentration is 126g / L, the leaching temperature is 70°C, and the leaching time is 2h. During the leaching process, the lithium leaching rate reaches 99.2%. After the leaching is completed, a lithium-containing solution is obtained by liquid-solid separation.

[0036] (5) adding sodium carbonate to the lithium-containing solution to adjust the alkalinity to carry out pr...

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 sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for extracting lithium from lithium ores, and belongs to the technical field of metallurgy. According to the method for extracting the lithium from the lithium ores, the lithium ores, calcium oxide and pulverized coals are uniformly mixed and then reacted at high temperature, the reaction product is subjected to water quenching and then is rapidly cooled to obtain water-quenched slags, the water-quenched slags are subjected to fine grinding and then added with a sulfuric acid solution for leaching so as to obtain a lithium-containing solution, and a lithium saltis obtained from the solution trough the chemical precipitation. The method for extracting the lithium from the lithium ores has the advantages of having high adaptability to raw materials, and beingshort in flow, few in working procedures and high lithium extraction rate.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for extracting lithium from lithium ore. Background technique [0002] Lithium is a soft, silvery-white alkali metal element. Lithium and its compounds have been widely used in heat-resistant glass, ceramics, lubricants, metallurgical additives and lithium-ion batteries. Lithium-ion battery, as the most promising rechargeable battery, has become the largest consumption field of lithium. The unprecedented growth of electric vehicles has dramatically increased demand for lithium. Lithium carbonate, one of the most important raw materials for lithium-ion battery production, is expected to be in short supply around 2020. The increasing demand for lithium has made lithium a strategically influential metal element. [0003] Lithium carbonate and another commonly used lithium salt (lithium phosphate) are mainly obtained by precipitation from the leach solution of lithium...

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): C22B26/12C22B3/06C22B3/08C22B3/10
CPCC22B3/065C22B3/08C22B3/10C22B26/12Y02P10/20
Inventor 王成彦邢鹏陈永强马保中
Owner UNIV OF SCI & TECH BEIJING