Continuous ion exchange device and method for extracting lithium from salt lake brine

A salt lake brine and continuous ion technology, applied in the field of continuous ion exchange for extracting lithium and continuous ion exchange device for extracting lithium, can solve the problems of low product concentration, low resin utilization rate, large water consumption, etc., and achieve high concentration of qualified liquid, The effect of high utilization rate and simple equipment

Active Publication Date: 2011-04-27
SUNRESIN NEW METERIALS CO LTD XIAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the invention is that the existing fixed bed adsorption device extracts lithium from the brine in the salt

Method used

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  • Continuous ion exchange device and method for extracting lithium from salt lake brine
  • Continuous ion exchange device and method for extracting lithium from salt lake brine
  • Continuous ion exchange device and method for extracting lithium from salt lake brine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] figure 1 , 2 The number of rinsing resin column groups set in is 3 groups, which are respectively the first rinsing resin column group, the second rinsing resin column group and the third rinsing resin column group, and the upper port of each resin column is provided with The brine feed branch pipe, the fast rinsing feed branch pipe, the washing feed branch pipe, the first reflux feed branch pipe and the second reflux feed branch pipe connected to it, and the brine discharge branch pipe connected to the lower port of each resin column , fast leaching discharge branch pipe, first reflux discharge branch pipe, second reflux discharge branch pipe and qualified liquid discharge branch pipe; the main feed pipe includes brine feed main pipe, fast leaching feed main pipe, washing feed feed main pipe , the first reflux feed main pipe and the second reflux feed main pipe, the discharge main pipe includes the brine discharge main pipe, the fast rinsing discharge main pipe, the f...

Embodiment 2

[0102] The difference with embodiment 1 is:

[0103] The resin of the resin column adopts the ion sieve type adsorbent seplite LXL-10B (Xi’an Lanxiao Technology Co., Ltd.), the content ratio of magnesium and lithium in the initial salt lake brine is 432:1, and the treatment rate of the salt lake brine in the adsorption resin column group of the salt lake brine is 5BV / h, processing capacity: 40BV, the processing rate of deionized water in the fast elution resin column group is 10BV / h, and the processing capacity is 2BV; the first elution resin column group, the second elution resin column group and the third elution resin column group The processing rate of the washing liquid in the eluting resin column group is 3BV / h, and the processing volume is 2BV.

[0104] Among them, the time for the control valve cycle switching is 480min.

[0105] The mass concentration ratio of magnesium and lithium in the upper feed liquid of the second leaching resin column group is 12: 1, and the m...

Embodiment 3

[0107] The difference with embodiment 1 is:

[0108] The resin of the resin column adopts Amberlite IR-120B (Rohm and Haas in the United States), and the magnesium-lithium content ratio in the initial salt lake brine is 432:1. The treatment rate of the salt lake brine in the adsorption resin column group is 6BV / h, and the treatment capacity is 50BV. The treatment rate of deionized water in the fast rinsing resin column group is 15BV / h, and the processing capacity is 4BV; the washing liquid in the first elution resin column group, the second elution resin column group and the third elution resin column group The processing rate is 4BV / h, and the processing capacity is 6BV.

[0109] Among them, the time for the control valve to switch periodically is 500min.

[0110] The mass concentration ratio of magnesium and lithium in the upper feed liquid of the second leaching resin column group is 13.5: 1, and the magnesium and lithium mass concentration ratio in its lower discharge liq...

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Abstract

The invention discloses a continuous ion exchange device for extracting lithium from salt lake brine, comprising resin, a plurality of resin columns used for loading the resin, a feeding main pipe which is communicated with the upper end of each resin column and a discharge main pipe which is communicated with the lower end of each resin column, wherein the resin columns are sequentially connected in series by a serial pipeline to form an adsorption resin column group, a rapid leaching resin column group and a leaching resin column group which are in sequential mobile circulation running, andeach feeding branch pipe and each discharge branch pipe are respectively provided with a control valve used for harmoniously controlling the transformation process of realizing ion exchange, washing,leaching and resin in turn among the resin column groups. Compared with the traditional fixed bed adsorption technology, the invention has the advantages of simple equipment, convenient operation, high automation degree, small usage amount of resin, high utilization ratio, stable product concentration and high concentration of qualified liquid.

Description

technical field [0001] The invention relates to a continuous ion exchange device, in particular to a continuous ion exchange device for extracting lithium from salt lake brine, and also relates to a continuous ion exchange method for extracting lithium from salt lake brine using the device. Background technique [0002] Metal lithium and its compounds have great application prospects in energy and new materials, and lithium extraction from salt lake brine will become the main direction of lithium salt production in the 21st century. Lithium resources in nature mainly occur in granite pegmatite deposits, salt lake brine, sea water and geothermal water. According to statistics, the reserves of lithium resources in salt lake brine account for about 70-80% of the total amount of lithium resources. Therefore, lithium extraction from salt lake brine will become the main way for lithium salt production. Lithium salt products (calculated as lithium carbonate) produced from brine in ...

Claims

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Application Information

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IPC IPC(8): C22B3/24C22B26/12
CPCY02P10/20
Inventor 寇晓康李岁党王刚边维娜樊文岷
Owner SUNRESIN NEW METERIALS CO LTD XIAN
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