SANTIAGO, April 22 (Reuters) - Miners Rio Tinto

and Eramet as well as battery maker LG Energy

were among 30 companies that submitted proposals to

develop lithium extraction technology for a Chilean salt flat in

early stages of exploration, state-run mining body ENAMI said on

Monday.

ENAMI last month put out a call for companies to present

technology to do pilot tests of lithium extraction techniques at

the salt flat known as Salares Altoandinos, which the Chilean

government is seeking to develop for lithium mining.