{"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":"extracao-de-litio-metodo-de-precipitacao-de-salmoura-de-lago-salgado","status":"publish","type":"new","link":"https:\/\/www.jxscmachine.com\/pt\/new\/lithium-extraction-salt-lake-brine-precipitation-method\/","title":{"rendered":"Extra\u00e7\u00e3o de l\u00edtio de salmoura de lago salgado: M\u00e9todo de Precipita\u00e7\u00e3o"},"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

O m\u00e9todo de precipita\u00e7\u00e3o<\/strong> \u00e9 uma das t\u00e9cnicas comuns utilizadas para extrair l\u00edtio de salmouras de lagos salgados. O processo envolve a precipita\u00e7\u00e3o selectiva de compostos de l\u00edtio da solu\u00e7\u00e3o de salmoura atrav\u00e9s de reac\u00e7\u00f5es qu\u00edmicas. O princ\u00edpio do m\u00e9todo de precipita\u00e7\u00e3o<\/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> Vamos apresentar estes tr\u00eas m\u00e9todos de precipita\u00e7\u00e3o para a extra\u00e7\u00e3o de l\u00edtio de lagos salgados.<\/p>\n

 <\/p>\n

\"Lago<\/a>
Lago Salgado<\/figcaption><\/figure>\n

 <\/p>\n

1. M\u00e9todo de precipita\u00e7\u00e3o de carbonatos<\/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\u00e9todo de precipita\u00e7\u00e3o de aluminatos<\/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\u00e9todo de co-precipita\u00e7\u00e3o de boro magn\u00e9sio e boro l\u00edtio<\/h2>\n

O m\u00e9todo de co-precipita\u00e7\u00e3o de boro e magn\u00e9sio<\/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

O m\u00e9todo de co-precipita\u00e7\u00e3o boro-l\u00edtio<\/strong> refere-se \u00e0 remo\u00e7\u00e3o de impurezas da salmoura antiga que precipitou s\u00f3dio e pot\u00e1ssio, adicionando precipitantes \u00e1cidos como \u00e1cido clor\u00eddrico ou \u00e1cido sulf\u00farico para fazer a co-precipita\u00e7\u00e3o de boro-l\u00edtio, para realizar a separa\u00e7\u00e3o de l\u00edtio e magn\u00e9sio. Depois de o res\u00edduo obtido ser lavado com \u00e1gua, as impurezas como o magn\u00e9sio e o c\u00e1lcio s\u00e3o profundamente removidas e, finalmente, \u00e9 adicionado um precipitante para preparar o carbonato de l\u00edtio. A taxa de recupera\u00e7\u00e3o do l\u00edtio atinge 75%-85%.<\/p>\n

O m\u00e9todo de co-precipita\u00e7\u00e3o de boro magn\u00e9sio e boro l\u00edtio<\/strong> \u00e9 adequado para a produ\u00e7\u00e3o de extra\u00e7\u00e3o de l\u00edtio a partir de salmoura de lago salgado com elevada rela\u00e7\u00e3o magn\u00e9sio-l\u00edtio na China. Este m\u00e9todo tem procedimentos de separa\u00e7\u00e3o simples, forte operacionalidade e alto rendimento de l\u00edtio. Tem algumas perspectivas de aplica\u00e7\u00e3o industrial, mas o problema \u00e9 que os precipitados obtidos pelo m\u00e9todo de co-precipita\u00e7\u00e3o de boro e magn\u00e9sio s\u00e3o maioritariamente coloidais e a separa\u00e7\u00e3o s\u00f3lido-l\u00edquido \u00e9 dif\u00edcil. Durante o processo de separa\u00e7\u00e3o, a taxa de perda de l\u00edtio atinge 15%-20%, resultando num grande desperd\u00edcio de l\u00edtio.<\/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

\u00c9 importante notar que o m\u00e9todo de precipita\u00e7\u00e3o \u00e9 apenas uma das v\u00e1rias t\u00e9cnicas utilizadas para a extra\u00e7\u00e3o de l\u00edtio. Outros m\u00e9todos, como a extra\u00e7\u00e3o por solventes e a extra\u00e7\u00e3o direta de l\u00edtio da salmoura, s\u00e3o tamb\u00e9m utilizados, dependendo das caracter\u00edsticas espec\u00edficas da salmoura e do produto final pretendido.<\/p>\n

 <\/p>\n

Resumo<\/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

Leitura alargada
\n<\/strong><\/p>\n

Tecnologia de flota\u00e7\u00e3o de min\u00e9rio de l\u00edtio<\/a>
\nF\u00e1brica de processamento de l\u00edtio<\/a>
\nOs 5 m\u00e9todos mais \u00fateis de beneficiamento na minera\u00e7\u00e3o de l\u00edtio<\/a>
\nPlanta de processamento de lepidolita 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 … Continuar a ler Extra\u00e7\u00e3o de l\u00edtio de salmoura de lago salgado: M\u00e9todo de Precipita\u00e7\u00e3o<\/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\/pt\/novo\/extracao-de-litio-metodo-de-precipitacao-de-salmoura-de-lago-salgado\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\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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