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...

AI Technical Summary

Problems solved by technology

[0005] my country's salt lake brine is rich in boron resources. However, the current development of salt lake brine resources and the process of extracting boron resources from brine often introduce chemical reagents, resulting in serious environmental pollution.

In addition, the environment in the plateau salt lake area is harsh. For example, Zabuye Lake and Jiezechaka Lake are both at an altitude of about 4500m. The traffic is basically in a blank state; the products are far away from the market, and the same product, such as KCl, is highly profitable in Golmud, with a net profit of more than 1,000 yuan per ton, while in Tibet, even if the increase in price and cost under harsh conditions is not considered, only transportation The increase in cost will greatly reduce the profit of the product or even turn it into a loss. Therefore, it will be very difficult to develop these salt lakes with the existing methods