Method for improving evaporation and concentration efficiency of salt pan

An evaporative concentration and efficiency technology, which is applied in the field of improving the evaporation and concentration efficiency of salt fields, can solve the problems of reducing the evaporation rate of salt fields, the poor hydrophilicity of plastics, and reducing the evaporation area, so as to achieve strong operational feasibility and increase the effective evaporation area. , the effect of increasing the evaporation rate

Inactive Publication Date: 2022-08-05
ZIJIN MINING GROUP
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Problems solved by technology

This method requires the use of modified hydrophilic polymer plastic beads, but in fact, no matter how modified, the hydrophilicity of the plastic is not very good, covering the surface

Method used

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  • Method for improving evaporation and concentration efficiency of salt pan

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Effect test

Embodiment 1

[0025] A salt lake uses the precipitation method to extract lithium. A layer of evaporation balls is placed in the pre-concentration tank. The coverage of the evaporation balls is 60%, the diameter of the evaporation balls is 50mm, and the outer covering of the evaporation balls is a small cotton bag. , the thickness of the small cloth bag is 2mm. The evaporation period of brine is about 11 months, and the evaporation rate of brine is increased by about 60%.

Embodiment 2

[0027] A salt lake uses the precipitation method to extract lithium. A layer of evaporation balls is placed in the pre-concentration tank. The coverage of the evaporation balls is 30%, the diameter of the evaporation balls is 50mm, and the outer covering of the evaporation balls is a small cotton bag. , the thickness of the small cloth bag is 2mm. The evaporation period of brine is about 14 months, and the evaporation rate of brine is increased by about 30%.

Embodiment 3

[0029] A salt lake uses the precipitation method to extract lithium. A layer of evaporation balls is placed in the pre-concentration tank. The coverage rate of the evaporation balls is 60%. The diameter of the evaporation balls is 80mm. The outer coating of the evaporation balls is a water-absorbing sponge. The thickness is 20mm. The evaporation period of brine is about 9.5 months, and the evaporation rate of brine is increased by about 90%.

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Abstract

The invention relates to a method for improving evaporation and concentration efficiency of a salt pan, which comprises but is not limited to paving a certain number of evaporation balls and a certain number of separation lines in a pre-concentration tank or an evaporation tank containing brine with lower lithium concentration in the earlier stage of evaporation and concentration, and installing a plastic filter screen at an outlet of the pre-concentration tank; the evaporation ball is a plastic hollow small ball which is wrapped by cloth or water absorption sponge or other material bags with good water absorption performance, the bag opening is drawn by an elastic band or is provided with a plastic zipper, and the effective evaporation area is increased through the capillary effect of the evaporation ball, so that the evaporation rate of the salt pond is increased or/and the area of the evaporation pond is reduced. The method has the advantages of simple process, low production cost, good feasibility of production and application, remarkable economic benefit and environmental benefit and the like, and is suitable for salt lake lithium extraction application.

Description

technical field [0001] The invention relates to the technical field of lithium extraction from salt lakes, in particular to a method for improving the evaporation and concentration efficiency of salt fields. Background technique [0002] To combat global warming, more and more countries have proposed carbon neutrality goals. The global new energy transformation drives lithium demand into a new round of growth cycle. Power and energy storage batteries will contribute to the main demand increase, global lithium demand will increase sharply, and lithium supply will gradually become scarce. Lithium resources mainly exist in lithium ore and salt lakes. Since the cost of lithium extraction from salt lakes is lower than that of ore extraction, salt lake lithium resources are an important source of global lithium resource supply. [0003] Commonly used techniques for extracting lithium from salt lakes mainly include precipitation method, adsorption method, membrane method, extract...

Claims

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Application Information

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IPC IPC(8): B01D1/00C22B26/12C22B3/22
CPCB01D1/0005C22B26/12C22B3/22Y02A20/212
Inventor 蓝碧波黄怀国庄荣传马建玲邢学永
Owner ZIJIN MINING GROUP
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