Method for treating salt lake brine by using serpentine

A technology of salt lake brine and serpentine, applied in the direction of magnesium carbonate, etc., can solve the problems of high energy consumption and high cost, and achieve the effect of low energy consumption, low cost and cost reduction

Active Publication Date: 2019-01-29
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the current problems in the process of extracting lithium from salt lake brine with high magnesium-lithium ratio are large energy consumption and high cost
[0020] However, there is no relevant information on the use of serpentine to treat salt lake brine to realize the effect of Mg on CO 2 The report on the method of mineralization storage and Li enrichment in salt lake brine, how to realize the separation of magnesium and lithium in low-cost high-magnesium-lithium ratio salt lake brine has become a technical problem to be solved urgently

Method used

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  • Method for treating salt lake brine by using serpentine
  • Method for treating salt lake brine by using serpentine
  • Method for treating salt lake brine by using serpentine

Examples

Experimental program
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Embodiment 1

[0044] In this example, see figure 1 , utilize serpentine to process the method for saline lake brine, comprise the steps:

[0045] a. Serpentine pretreatment:

[0046] After the serpentine is crushed, it is ground in a planetary ball mill for 1 hour at a speed of 300r / min, and ball milling is carried out, and the sieve hole size is 200 mesh to obtain the ball milled pretreated serpentine powder, and then the serpentine powder is processed in a muffle furnace Then heat and calcine at 700° C. for 15 minutes to obtain calcined pre-activated serpentine powder;

[0047] b. Mineralization coupled reaction process:

[0048] Mix the 20g pretreated serpentine powder and 140ml salt lake brine after the treatment in the step a, and add it into the autoclave; CO 2 , forming serpentine-salt lake brine-CO 2 Reactant system solution, controlling the CO above the surface of the reactant system solution 2 The equilibrium pressure is 10Mpa, the temperature is controlled at 40°C, the reac...

Embodiment 2

[0058] This embodiment is basically the same as Embodiment 1, especially in that:

[0059] In the present embodiment, utilize serpentine to process the method for saline lake brine, comprises the steps:

[0060] a. Serpentine pretreatment:

[0061] After the serpentine is crushed, it is ground in a planetary ball mill for 5 hours at a speed of 300r / min, and ball milling is carried out, and the sieve size of the sieve is 300 mesh to obtain the ball milled pretreated serpentine powder, and then the serpentine powder is processed in a muffle furnace Then heat and calcine at 500° C. for 240 minutes to obtain calcined pre-activated serpentine powder;

[0062] b. Mineralization coupled reaction process:

[0063] Mix the 20g pretreated serpentine powder and 500ml salt lake brine after the treatment in the step a, and add it to the autoclave; CO 2 , forming serpentine-salt lake brine-CO 2 Reactant system solution, controlling the CO above the surface of the reactant system soluti...

Embodiment 3

[0069] This embodiment is basically the same as the previous embodiment, and the special features are:

[0070] In the present embodiment, utilize serpentine to process the method for saline lake brine, comprises the steps:

[0071] a. Serpentine pretreatment:

[0072] After the serpentine is crushed, it is ground in a planetary ball mill for 3 hours at a speed of 300r / min, and ball milling is carried out, and the sieve hole size is 100 mesh to obtain the ball milled pretreated serpentine powder, and then the serpentine powder is processed in a muffle furnace Then heat and calcine at 800° C. for 15 minutes to obtain calcined pre-activated serpentine powder;

[0073] b. Mineralization coupled reaction process:

[0074] Mix the 20g pretreated serpentine powder and 20ml salt lake brine after the treatment in the step a, and add it to the autoclave; CO 2 , forming serpentine-salt lake brine-CO 2 Reactant system solution, controlling the CO above the surface of the reactant sy...

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Abstract

The invention discloses a method for treating salt lake brine by using serpentine, uses serpentine to treat the salt lake brine to realize CO2 mineralization storage and enrichment of Li in the salt lake brine through Mg, and belongs to the fields of mine, metallurgy, chemical industry and environment. The method for treating the salt lake brine by using serpentine comprises the following steps: apre-activated serpentine is put into the salt lake brine with a high Mg-Li ratio, CO2 is bubbled into the salt lake brine, the solution is filtered when the reaction reaches an equilibrium, SiO2 in the serpentine residue after filtration is transferred by a strong alkali, the remaining solid after the alkali reaction is added into the filtrate, CO2 is bubbled to make the remaining solid react completely, the pH value is controlled to be 8-12, and MgCO3 precipitations are formed. According to the method, the cost of Li enrichment in the salt lake brine is reduced, guarantees for a lithium extraction process with low energy consumption, low cost and high profits are provided, and serpentine is used as an alkaline substitute of sodium carbonate to separate Mg and Li from the salt lake brinewith a high Mg-Li ratio, so that a new way for the development and utilization of serpentine ores is opened up.

Description

technical field [0001] The present invention relates to a treatment method for salt lake brine, in particular to a treatment method for separating magnesium from salt lake brine, and also relates to a CO 2 The method for mineralization and storage also relates to a method for utilizing serpentine, which is applied in the fields of mining, metallurgy, chemical industry and environmental technology. Background technique [0002] Lithium is the lightest and most active metal element in nature, and it is widely used in many fields because of its unique physical and chemical properties. Entering the 21st century, with the rapid development of new energy and new material industries, lithium, as a resource that plays an important role in the fields of high-energy batteries, aerospace, nuclear fusion power generation, etc., has attracted more and more attention from all countries in the world. Lithium and lithium salts The status of strategic resources has been gradually improved. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F5/24
CPCC01F5/24
Inventor 朱萍李祖良王杨君钱光人
Owner SHANGHAI UNIV
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