Method for extracting lithium from lithium clay
The invention discloses a method for extracting lithium from lithium clay, which comprises the following steps: roasting lithium clay powder, grinding roasted clinker, mixing the ground roasted clinker with a leaching agent and water, leaching at the temperature of 150-300 DEG C and the pressure of...
Saved in:
Main Authors | , , , , , |
---|---|
Format | Patent |
Language | Chinese English |
Published |
11.10.2022
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | The invention discloses a method for extracting lithium from lithium clay, which comprises the following steps: roasting lithium clay powder, grinding roasted clinker, mixing the ground roasted clinker with a leaching agent and water, leaching at the temperature of 150-300 DEG C and the pressure of 1.4-2.5 MPa, and carrying out solid-liquid separation to obtain a lithium-containing solution and leaching residues, the leaching agent is at least one of sodium hydroxide, potassium hydroxide, strong acid salt of sodium or strong acid salt of potassium, adding a proper amount of the leaching agent into the lithium-containing solution, returning to the step S2 for cyclic leaching, and carrying out cyclic leaching for several times according to the process to obtain a lithium-rich solution. According to the method, lithium in the lithium clay is selectively leached based on the ion exchange effect between Li < + > in the lithium clay ore and Na < + >/K < + > in the leaching agent at high temperature and high pressur |
---|---|
Bibliography: | Application Number: CN202210741423 |