Method for preparing boron ore from mixed brine by using natural energy

Abstract

The invention provides a method for preparing boron ore from mixed brine by using natural energy. The method comprises the following steps: orderly subjecting a carbonate brine to evaporation, freezing and evaporation treatment, and obtaining brine A when Li in the brine is lower than or equal to 2.5g / L or the content of lithium carbonate in solid ore separated out from the brine is lower than or equal to 0.5%; orderly subjecting a sulfate brine to evaporation, freezing and evaporation treatment, and obtaining brine B when Mg in the brine is greater than or equal to 10g / L; mixing the brine A with the brine B for reacting to obtain brine C; naturally evaporating the brine C to a certain degree to obtain brine D; freezing the brine D to obtain brine E; evaporating the brine E to a certain degree to obtain brine F; evaporating the brine F until a mineral containing lithium is separated out to obtain brine G; mixing the brine G with high-magnesium brine to obtain brine H; reacting the brine H with mirabilite, and obtaining brine I when the ratio of Mg to Li is lower than or equal to 8:1; evaporating the brine I, proportionally mixing the brine I with fresh water or a sulfate original brine, and evaporating to separate out the boron ore.

Description

technical field

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

[0002] According to the type of brine, the salt lakes in the world can be roughly divided into several categories: carbonate type, sulfate type, chloride type and nitrate type.

[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] Boron has unique physical and chemical properties, and its application fields are very wide. In the glass industry, boron can shorten the melting time and improve transparency; in the field of electronics and computers, supercon...