Method of preparing lithium borate ores from mixed brine by utilizing natural energy

Abstract

The invention discloses a method of preparing lithium borate ores from mixed brine by utilizing natural energy. The method comprises the following steps: evaporating, freezing and evaporating carbonate brine until Li content is less than or equal to 2.5g / L or content of lithium carbonate in solid ores separated out in the brine is less than or equal to 0.5% to obtain brine A; collecting an alkaline mixture generated in the freezing process; evaporating, freezing and evaporating sulfate brine until Mg content is greater than or equal to 10g / L to obtain brine B; mixing and reacting the brine A and the brine B to obtain brine C; evaporating the brine C until sulfate radical content is 5g / L-40g / L to obtain brine D; freezing and nitrifying the brine D to obtain brine E; evaporating the brine E to a certain degree to obtain brine F; naturally evaporating the brine F to separate out sylvine ores and brine G; mixing and reacting the brine G and high-magnesium brine to obtain brine H; reacting the brine H with mirabilite to obtain brine I; evaporating the brine I to concentrate and separate out lithium sulfate ores and brine J; mixing and evaporating the brine J with fresh water or sulfate type original brine to separate out boron ores.

Description

technical field

[0001] The invention relates to a development and utilization process of salt lake brine, in particular to a method for preparing lithium carbonate salt ore from mixed brine by using natural energy. Background technique

[0002] Lithium, known as the "energy upstart" in the 21st century, is the lightest and most active metal element in nature, and it is a new energy raw material. Lithium resources in nature mainly exist in granite pegmatite deposits, salt lake brine, sea water and geothermal water.

[0003] The boron-rich lithium carbonate salt lake is a kind of resource with high value. Tibet, located on the Qinghai-Tibet Plateau, is one of the areas in the world where carbonate-type boron-rich lithium salt lakes are concentrated. Zabuye and Jiezechaka are typical representatives of them, which contain lithium, potassium, and boron resources.

[0004] In the existing carbonate-type boron-rich lithium salt lakes, taking the Jiezechaka Salt Lake in Tibet as ...

Images