1. Extracting lithium from lepidolite was studied.

2. Lepidolite (in mica form) is a crystal I have used for around 10 years (under my pillow) to protect myself some harmful electromagnetic radiation.

3. Firstly, the method of extracting lithium from lepidolite has been studied.

4. A new collector BK 307 for lepidolite flotation is investigated andcompared with mixed amine.

5. A new method is given for separating K, Rb, Cs from mother liquor after extracting lithium from lepidolite.

6. A process for producing lithium-bearing alumina has been developed, which combines the digesting of lepidolite by lime with a process for producing alumina.

7. This paper mainly declares the method of extracting lithium from lepidolite and preparing the lithium chloride by double-decompose reaction with material lithium sulfate and calcium chloride.

8. A new method is given for separating K, Rb, Cs from mother liquor after extracting lithium from lepidolite. The authors study the best separating conditions.