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Method for solarization concentration of salt lake brine with high magnesium-lithium ratio

A technology of high magnesium-lithium ratio, soft potassium magnesium sail brine, applied in chemical instruments and methods, lithium compounds, alkali metal chlorides, etc., can solve the problem of poor traffic conditions, abnormal development conditions, and difficulties in boron and lithium production in the salt lake area. and other problems, to achieve the effect of improving quality, low cost of beach drying, good social and economic benefits

Inactive Publication Date: 2020-04-21
QINGHAI LITHIUM IND
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Problems solved by technology

However, the production of boron and lithium is still difficult
[0004] The development conditions in the salt lake area are extremely harsh. So far, except for some brine lithium mines that have been partially developed, there have been no successful examples of brine comprehensive development. The environment is extremely harsh, the ecological environment is very fragile, and the environmental protection requirements are high; the traffic is inconvenient, the traffic conditions in the Salt Lake area are extremely poor, far away from the national road, and the best conditions can only be reached by gravel roads, and far away from the product market consumption area, the shortest transportation distance is 2000km , most of which are more than 3000km away; the infrastructure is basically blank, far away from the power grid, there is no condition for the construction of large-scale chemical plants, and there are no chemical enterprises and auxiliary facilities available for hundreds of kilometers

Method used

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  • Method for solarization concentration of salt lake brine with high magnesium-lithium ratio

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] combine figure 1 Shown, a kind of method that high magnesium lithium ratio salt lake brine brine is sun-dried and concentrated, comprises the following steps:

[0047] (1) will be composed into B 3+ 0.01wt%, Li + 0.01wt%, K + 0.5wt%, Na + 5wt%, Mg 2+ 1.0wt%, SO 4 2- 2.5wt%, Cl - The 10wt% high-magnesium-lithium ratio salt lake intercrystalline brine is introduced into the sodium salt pool for beach drying and evaporation, and the content of sodium ions, potassium ions, boron ions and lithium ions in the brine is adjusted by controlling the water intake of the brine, and the beach drying is until soft potassium and magnesium The sail is just saturated, and at this time, the sodium ion content is 2.8wt%, the potassium ion content is 2.5wt%, the lithium ion content is 0.08wt%, and the boron ion content is 0.1wt%.

[0048] (2) Introduce the brine in step (1) that has been sun-dried until the magnesite is just saturated into the sulfur mixing pool for sun-drying and ...

Embodiment 2

[0051] combine figure 1 Shown, a kind of method that high magnesium lithium ratio salt lake brine brine is sun-dried and concentrated, comprises the following steps:

[0052] (1) will be composed into B 3+ 0.05wt%, Li + 0.05wt%, K + 0.8wt%, Na + 7wt%, Mg 2+ 1.3wt%, SO 4 2- 2.8wt%, Cl - The 15wt% high-magnesium-lithium ratio salt lake intercrystalline brine is introduced into the sodium salt pool for beach drying and evaporation, and the content of sodium ions, potassium ions, boron ions and lithium ions in the brine is adjusted by controlling the water intake of the brine, and the beach drying is until soft potassium and magnesium The sail is just saturated, at this time, the sodium ion content is 3.2wt%, the potassium ion content is 2.8wt%, the lithium ion content is 0.12wt%, and the boron ion content is 0.15wt%.

[0053] (2) Introduce the brine in step (1) that has been sun-dried until the magnesite is just saturated into the sulfur mixing pool for sun-drying and con...

Embodiment 3

[0056] combine figure 1 Shown, a kind of method that high magnesium lithium ratio salt lake brine brine is sun-dried and concentrated, comprises the following steps:

[0057] (1) will be composed into B 3+ 0.1wt%, Li + 0.1wt%, K + 0.1wt%, Na + 10wt%, Mg 2+ 1.5wt%, SO 4 2- 3.0wt%, Cl - The 20wt% high-magnesium-lithium ratio salt lake intercrystalline brine is introduced into the sodium salt pool for beach drying and evaporation, and the content of sodium ions, potassium ions, boron ions and lithium ions in the brine is adjusted by controlling the water intake of the brine, and the beach drying is until soft potassium and magnesium The sail is just saturated, and at this time, the sodium ion content is 3.5wt%, the potassium ion content is 3.0wt%, the lithium ion content is 0.15wt%, and the boron ion content is 0.2wt%.

[0058] (2) Introduce the brine in step (1) that has been sun-dried until the magnesite is just saturated into the sulfur mixing pool for sun-drying and c...

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Abstract

The invention relates to the technical field of salt lake brine utilization, in particular to a method for solarization concentration of salt lake brine with a high magnesium-lithium ratio. The methodcomprises the following steps: S101, solarization and evaporation in a sodium salt pond: introducing salt lake intergranular brine with a high magnesium-lithium ratio into the sodium salt pond for solarization and evaporation until picromerite is saturated; S102, solarization and concentration in a sulfur mixed ore pool: introducing the saturated picromerite brine obtained in the step S101 into the sulfur mixed ore pool for solarization and concentration until KCl begins to separate out and picromerite is completely crystallized and begins to dissolve; and S103, solarization and concentrationin a potassium mixed salt pond: introducing the brine obtained in the step S102 into the potassium mixed salt pond for solarization and concentration till brucite starts to be saturated, wherein at the moment, the concentration of Li<+> and B<3+> in the brine can meet the requirements of industrial extraction and separation. The method has the advantages that (1) the process is simple and easy tooperate; (2) solarization cost is low, and economic benefits are remarkable; (3) no pollution is produced; and (4) resources are comprehensively utilized and are not wasted.

Description

technical field [0001] The invention relates to the technical field of salt lake brine utilization, in particular to a method for beach-drying and concentrating salt lake brine with a high magnesium-lithium ratio. Background technique [0002] Lithium, as an important energy metal, is widely used in new energy, medicine, aerospace, refrigerant and other fields. The development and application of high-tech products prepared from lithium have penetrated into people's daily life. As the demand for lithium salt products in the world increases year by year, the demand for lithium salt raw materials such as lithium carbonate and lithium hydroxide is also rising. [0003] There are a large number of salt lakes on the Qinghai-Tibet Plateau in my country. Among them, the salt lakes in the Qaidam area of ​​Qinghai, such as Chaerhan Salt Lake, Dachaidan Salt Lake, East-West Taijinel Salt Lake, Yiliping Salt Lake, Gasikule Salt Lake, etc., after decades of massive investment by the sta...

Claims

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Application Information

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IPC IPC(8): C01D15/00C01D3/06
CPCC01D15/00C01D3/06
Inventor 刘国旺周晓军马军杨尚明张世春申朝贵丁林董守龙李斌寿李显君
Owner QINGHAI LITHIUM IND
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