{"id":20800,"date":"2023-05-31T14:29:27","date_gmt":"2023-05-31T06:29:27","guid":{"rendered":"https:\/\/www.jxscmachine.com\/?post_type=new&p=20800"},"modified":"2026-07-14T15:34:30","modified_gmt":"2026-07-14T07:34:30","slug":"methode-dextraction-du-lithium-par-precipitation-dans-un-lac-sale","status":"publish","type":"new","link":"https:\/\/www.jxscmachine.com\/fr\/new\/lithium-extraction-salt-lake-brine-precipitation-method\/","title":{"rendered":"Extraction de lithium \u00e0 partir de saumures de lacs sal\u00e9s : M\u00e9thode de pr\u00e9cipitation"},"content":{"rendered":"

Abstract:<\/strong> With the rapid development of the new energy vehicle and energy storage industries, the demand for lithium\u2014a crucial strategic resource of the 21st century\u2014continues to rise. Nearly 60% of global lithium resources are contained in salt lake brines;<\/strong> compared to spodumene ores, lithium extraction from salt lakes<\/strong> offers the advantages of abundant reserves and lower costs. As a traditional extraction method, precipitation<\/strong> remains widely used in industrial production due to its process simplicity and technological maturity. This paper provides a systematic overview of the principles and process types of the precipitation method, as well as its application in lithium extraction from salt lakes.<\/p>\n

 <\/p>\n

Introduction to the Precipitation Method<\/h2>\n

Les m\u00e9thode de pr\u00e9cipitation<\/strong> est l'une des techniques couramment utilis\u00e9es pour extraire le lithium des saumures des lacs sal\u00e9s. Le processus consiste \u00e0 pr\u00e9cipiter s\u00e9lectivement les compos\u00e9s de lithium de la solution de la saumure par le biais de r\u00e9actions chimiques. Les principe de la m\u00e9thode des pr\u00e9cipitations<\/strong> is to use solar energy to evaporate and concentrate salt lake brine naturally. After removing boron, calcium, and magnesium to remove impurities, a mixture of precipitants or salting-out agents is added to the mother liquor to separate lithium in the form of precipitates. Precipitation extraction of lithium metal has been applied earlier in industry. The process is mature, simple to operate, and highly reliable. However, this method needs better adaptability to brines with high concentrations of alkaline earth metal ions and low concentrations of lithium ions. According to the specific process, the precipitation method is divided into carbonate, aluminate, boron magnesium, and boron lithium co-precipitation.<\/strong> Nous allons pr\u00e9senter ces trois m\u00e9thodes de pr\u00e9cipitation pour l'extraction du lithium des lacs sal\u00e9s.<\/p>\n

 <\/p>\n

\"Lac<\/a>
Lac sal\u00e9<\/figcaption><\/figure>\n

 <\/p>\n

1. M\u00e9thode de pr\u00e9cipitation des carbonates<\/span> <\/p>\n

The carbonate precipitation method involves evaporating and concentrating the lithium-containing brine from the salt lake, adding lime to remove residual calcium, magnesium, and other basic metal impurities, and then adding a sodium carbonate precipitant to prepare lithium carbonate products. The method has low energy consumption and applies to industrial production and extraction. The disadvantage is that lithium selectivity is low, and alkali consumption is relatively high in the production process. After the salt lake brine is naturally evaporated and concentrated by solar energy to make salt, it is separated by segmental crystallization. Then an alkaline precipitant and impurity metal Mg2+ are added to form an insoluble precipitate. Magnesium is removed by solid-liquid separation, and then a specific temperature and alkalinity are maintained. Evaporate and crystallize NaCl, and finally add precipitant soda ash to prepare the lithium carbonate product. Use ammonia water and ammonium bicarbonate to adjust the brine alkalinity and precipitate the impurity magnesium. The removal rate of magnesium is about 98%, and the recovery rate of lithium is above 95%. The carbonate precipitation method has the advantages of simple operation and mature technology. It is currently the most important method for extracting lithium from salt lake brine with a low magnesium-lithium ratio. In the separation and extraction process, problems such as large alkali consumption and poor selectivity limit its industrial application.<\/p>\n

 <\/p>\n

2. M\u00e9thode de pr\u00e9cipitation des aluminates<\/h2>\n

By reasonably controlling the aluminum-lithium ratio, we obtain aluminum-lithium precipitates first, filter the sediments, calcinate the residues at high temperatures, and immerse the calcined products in water to separate aluminum-lithium. Use a precipitating agent to remove impurities such as calcium and magnesium in the lithium-containing solution, add sodium carbonate after evaporation and concentration for the lithium precipitation reaction, and realize the production of lithium carbonate products. Use AlCl3\u00b7H2O and NaOH as raw materials; the aluminum hydroxide precipitation method is used to precipitate lithium selectively, and then the aluminum-lithium coprecipitate is subjected to high-temperature calcination and room-temperature water immersion. After filtration, we obtain a lithium-containing solution. Add NaOH to the solution to remove calcium and magnesium impurities. After that, add sodium carbonate to get lithium carbonate. Generally speaking, the aluminate precipitation method has problems such as high evaporation energy consumption of carbonization liquid and roasting leaching liquid, large freshwater consumption, and complicated process flow.<\/p>\n

 <\/p>\n

3. M\u00e9thode de co-pr\u00e9cipitation du bore magn\u00e9sium et du bore lithium<\/h2>\n

Les m\u00e9thode de co-pr\u00e9cipitation bore-magn\u00e9sium<\/strong> refers to the demagnetization of the brine after the evaporation and concentration of the salt field to precipitate the potassium-magnesium mixed salt, adding an alkaline precipitant to control the pH value at 8-10, and under a specific temperature and pressure, making boron and magnesium co-precipitate. After solid-liquid separation, add NaOH to the mother liquor for deep magnesium removal. Then add soda ash to prepare lithium carbonate products. The recovery rate of lithium in this method reaches 80%-90%.<\/p>\n

Les m\u00e9thode de co-pr\u00e9cipitation bore-lithium<\/strong> consiste \u00e0 \u00e9liminer les impuret\u00e9s de l'ancienne saumure qui a pr\u00e9cipit\u00e9 le sodium et le potassium, en ajoutant des pr\u00e9cipitants acides tels que l'acide chlorhydrique ou l'acide sulfurique pour r\u00e9aliser la co-pr\u00e9cipitation bore-lithium, afin de r\u00e9aliser la s\u00e9paration du lithium et du magn\u00e9sium. Apr\u00e8s le lavage \u00e0 l'eau du r\u00e9sidu obtenu, les impuret\u00e9s telles que le magn\u00e9sium et le calcium sont \u00e9limin\u00e9es en profondeur et, enfin, un pr\u00e9cipitant est ajout\u00e9 pour pr\u00e9parer le carbonate de lithium. Le taux de r\u00e9cup\u00e9ration du lithium atteint 75%-85%.<\/p>\n

Les m\u00e9thode de co-pr\u00e9cipitation de bore-magn\u00e9sium et de bore-lithium<\/strong> est adapt\u00e9e \u00e0 l'extraction du lithium \u00e0 partir de saumures de lacs sal\u00e9s \u00e0 forte teneur en magn\u00e9sium et en lithium en Chine. Cette m\u00e9thode pr\u00e9sente des proc\u00e9dures de s\u00e9paration simples, une bonne op\u00e9rabilit\u00e9 et un rendement \u00e9lev\u00e9 en lithium. Elle offre certaines perspectives d'application industrielle, mais le probl\u00e8me est que les pr\u00e9cipit\u00e9s obtenus par la m\u00e9thode de copr\u00e9cipitation bore-magn\u00e9sium sont principalement collo\u00efdaux et que la s\u00e9paration solide-liquide est difficile. Au cours du processus de s\u00e9paration, le taux de perte de lithium atteint 15%-20%, ce qui entra\u00eene un gaspillage important de lithium.<\/p>\n

Based on the boron-lithium co-precipitation method, boron-lithium co-precipitation is carried out by using the process of primary freezing, evaporation with halogen, primary evaporation, secondary freezing, secondary evaporation, and precipitation of boron-lithium. The recovery rate of boron-lithium in this method is relatively high and has strong practicality. The precipitation process was developed earlier and had the advantages of mature process technology and high operational reliability. However, for the production process in China that uses high-magnesium-lithium ratio salt lake brine as raw material, the alkaline precipitant is generally large, the production cost is relatively high, and there is high & poor selectivity to lithium and other issues.<\/p>\n

Il convient de noter que la m\u00e9thode de pr\u00e9cipitation n'est qu'une des nombreuses techniques employ\u00e9es pour l'extraction du lithium. D'autres m\u00e9thodes, telles que l'extraction par solvant et l'extraction directe du lithium \u00e0 partir de la saumure, sont \u00e9galement utilis\u00e9es en fonction des caract\u00e9ristiques sp\u00e9cifiques de la saumure et du produit final souhait\u00e9.<\/p>\n

 <\/p>\n

R\u00e9sum\u00e9<\/h2>\n

As a mature technology for lithium extraction from salt lakes<\/strong>, the precipitation method encompasses various process variants tailored to different brine compositions. The carbonate method is suitable for systems with simple matrices and low magnesium-to-lithium ratios; the aluminate method can handle higher magnesium-to-lithium ratios; and boron-related processes are appropriate for boron-bearing salt lakes. Current research focuses on developing novel precipitants, optimizing precipitation conditions, and enhancing lithium recovery rates to maintain the method’s competitiveness in lithium resource development. With future technological advancements, the precipitation method is expected to overcome existing limitations and play a more significant role in processing brines with high magnesium-to-lithium ratios.<\/p>\n

 <\/p>\n

Lecture approfondie
\n<\/strong><\/p>\n

Technologie de flottation du minerai de lithium<\/a>
\nUsine de traitement du lithium<\/a>
\nLes 5 m\u00e9thodes les plus utiles pour l'extraction du lithium<\/a>
\nUsine de traitement de la l\u00e9pidolite 10TPH<\/a><\/p>\n

 <\/p>","protected":false},"excerpt":{"rendered":"

Abstract: With the rapid development of the new energy vehicle and energy storage industries, the demand for lithium\u2014a crucial strategic resource of the 21st century\u2014continues to rise. Nearly 60% of global lithium resources are contained in salt lake brines; compared to spodumene ores, lithium extraction from salt lakes offers the advantages of abundant reserves and … Continuer la lecture de Extraction de lithium \u00e0 partir de saumures de lacs sal\u00e9s : M\u00e9thode de pr\u00e9cipitation<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":20802,"parent":0,"menu_order":145,"comment_status":"closed","ping_status":"open","template":"","format":"standard","meta":{"_acf_changed":false,"ngg_post_thumbnail":0,"footnotes":""},"categories":[],"tags":[],"class_list":["post-20800","new","type-new","status-publish","format-standard","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"\nLithium Extraction From Salt Lake Brine: Precipitation Method - JXSC Machine<\/title>\n<meta name=\"description\" content=\"As a mature technology for lithium extraction from salt lakes, the precipitation method is simple to operate and highly reliable.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.jxscmachine.com\/fr\/nouveau\/methode-dextraction-du-lithium-par-precipitation-dans-un-lac-sale\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Lithium Extraction From Salt Lake Brine: Precipitation Method - 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