{"id":20800,"date":"2023-05-31T14:29:27","date_gmt":"2023-05-31T06:29:27","guid":{"rendered":"https:\/\/www.jxscmachine.com\/?post_type=new&#038;p=20800"},"modified":"2023-05-31T14:31:29","modified_gmt":"2023-05-31T06:31:29","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":"<p>O <strong>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 <strong>princ\u00edpio do m\u00e9todo de precipita\u00e7\u00e3o<\/strong> consiste em utilizar a energia solar para evaporar e concentrar naturalmente a salmoura de um lago salgado. Depois de remover o boro, o c\u00e1lcio e o magn\u00e9sio para eliminar as impurezas, \u00e9 adicionada ao licor-m\u00e3e uma mistura de precipitantes ou agentes de extra\u00e7\u00e3o de sal para separar o l\u00edtio sob a forma de precipitados. A extra\u00e7\u00e3o por precipita\u00e7\u00e3o do l\u00edtio met\u00e1lico foi aplicada anteriormente na ind\u00fastria. O processo \u00e9 maduro, simples de operar e altamente fi\u00e1vel. No entanto, este m\u00e9todo necessita de uma melhor adaptabilidade a salmouras com elevadas concentra\u00e7\u00f5es de i\u00f5es de metais alcalino-terrosos e baixas concentra\u00e7\u00f5es de i\u00f5es de l\u00edtio. De acordo com o processo espec\u00edfico, o m\u00e9todo de precipita\u00e7\u00e3o divide-se em <strong>carbonato, aluminato, boro magn\u00e9sio e co-precipita\u00e7\u00e3o de boro l\u00edtio.<\/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>&nbsp;<\/p>\n<figure id=\"attachment_20802\" aria-describedby=\"caption-attachment-20802\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2023\/05\/Salt-Lake.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-20802\" src=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2023\/05\/Salt-Lake.jpg\" alt=\"Lago Salgado\" width=\"800\" height=\"422\" srcset=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2023\/05\/Salt-Lake.jpg 1254w, https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2023\/05\/Salt-Lake-768x405.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/a><figcaption id=\"caption-attachment-20802\" class=\"wp-caption-text\">Lago Salgado<\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<p><span style=\"font-size: 29px; font-weight: bold; color: #333333; font-family: 'Noto Serif', serif;\">1. M\u00e9todo de precipita\u00e7\u00e3o de carbonatos<\/span>&nbsp;<\/p>\n<p>O m\u00e9todo de precipita\u00e7\u00e3o de carbonato consiste em evaporar e concentrar a salmoura que cont\u00e9m l\u00edtio do lago salgado, adicionar cal para remover o c\u00e1lcio e o magn\u00e9sio residuais e outras impurezas met\u00e1licas b\u00e1sicas na salmoura e, em seguida, adicionar carbonato de s\u00f3dio precipitante para preparar produtos de carbonato de l\u00edtio. O m\u00e9todo tem um baixo consumo de energia e aplica-se \u00e0 produ\u00e7\u00e3o e extra\u00e7\u00e3o industrial. A desvantagem \u00e9 que a seletividade do l\u00edtio \u00e9 baixa e o consumo de \u00e1lcalis \u00e9 relativamente grande no processo de produ\u00e7\u00e3o. Depois de a salmoura do lago salgado ser naturalmente evaporada e concentrada pela energia solar para produzir sal, esta \u00e9 separada por cristaliza\u00e7\u00e3o segmentar. Em seguida, um precipitante alcalino e o metal de impureza Mg2+ s\u00e3o adicionados para formar um precipitado insol\u00favel. O magn\u00e9sio \u00e9 removido por separa\u00e7\u00e3o s\u00f3lido-l\u00edquido e, em seguida, uma temperatura e alcalinidade espec\u00edficas s\u00e3o mantidas. Evaporar e cristalizar NaCl e, finalmente, adicionar carbonato de s\u00f3dio precipitante para preparar o produto de carbonato de l\u00edtio. Utilizar \u00e1gua de amon\u00edaco e bicarbonato de am\u00f3nio para ajustar a alcalinidade da salmoura e precipitar as impurezas de magn\u00e9sio. A taxa de remo\u00e7\u00e3o do magn\u00e9sio \u00e9 de cerca de 98%, e a taxa de recupera\u00e7\u00e3o do l\u00edtio \u00e9 superior a 95%. O m\u00e9todo de precipita\u00e7\u00e3o de carbonato tem as vantagens de uma opera\u00e7\u00e3o simples e de uma tecnologia madura. \u00c9 atualmente o m\u00e9todo mais importante para extrair l\u00edtio de salmoura de lago salgado com uma baixa rela\u00e7\u00e3o magn\u00e9sio-l\u00edtio. No processo de separa\u00e7\u00e3o e extra\u00e7\u00e3o, problemas como o grande consumo de \u00e1lcalis e a fraca seletividade limitam a sua aplica\u00e7\u00e3o industrial.<\/p>\n<h2>2. M\u00e9todo de precipita\u00e7\u00e3o de aluminatos<\/h2>\n<p>Ao controlar razoavelmente a rela\u00e7\u00e3o alum\u00ednio-l\u00edtio, obtemos primeiro precipitados de alum\u00ednio-l\u00edtio, filtramos os sedimentos e calcinamos os res\u00edduos a altas temperaturas, e mergulhamos os produtos calcinados em \u00e1gua para separar o alum\u00ednio-l\u00edtio. Utilizar um agente precipitante para remover impurezas como o c\u00e1lcio e o magn\u00e9sio na solu\u00e7\u00e3o contendo l\u00edtio, adicionar carbonato de s\u00f3dio ap\u00f3s a evapora\u00e7\u00e3o e concentra\u00e7\u00e3o para a rea\u00e7\u00e3o de precipita\u00e7\u00e3o do l\u00edtio e realizar a produ\u00e7\u00e3o de produtos de carbonato de l\u00edtio. Utilizar AlCl3-H2O e NaOH como mat\u00e9rias-primas, o m\u00e9todo de precipita\u00e7\u00e3o de hidr\u00f3xido de alum\u00ednio \u00e9 utilizado para precipitar o l\u00edtio seletivamente e, em seguida, o coprecipitado de alum\u00ednio-l\u00edtio \u00e9 submetido a calcina\u00e7\u00e3o a alta temperatura e imers\u00e3o em \u00e1gua \u00e0 temperatura ambiente. Ap\u00f3s filtra\u00e7\u00e3o, obt\u00e9m-se uma solu\u00e7\u00e3o contendo l\u00edtio. Adicionar NaOH \u00e0 solu\u00e7\u00e3o para remover as impurezas de c\u00e1lcio e magn\u00e9sio. Em seguida, adicionar carbonato de s\u00f3dio para obter carbonato de l\u00edtio. De um modo geral, o m\u00e9todo de precipita\u00e7\u00e3o de aluminato apresenta problemas como o elevado consumo de energia de evapora\u00e7\u00e3o do l\u00edquido de carboniza\u00e7\u00e3o e do l\u00edquido de lixivia\u00e7\u00e3o por torrefa\u00e7\u00e3o, o grande consumo de \u00e1gua doce e o fluxo complicado do processo.<\/p>\n<p>&nbsp;<\/p>\n<h2>3. M\u00e9todo de co-precipita\u00e7\u00e3o de boro magn\u00e9sio e boro l\u00edtio<\/h2>\n<p>O <strong>m\u00e9todo de co-precipita\u00e7\u00e3o de boro e magn\u00e9sio<\/strong> refere-se \u00e0 desmagnetiza\u00e7\u00e3o da salmoura ap\u00f3s a evapora\u00e7\u00e3o e concentra\u00e7\u00e3o do campo salino para precipitar o sal misto de pot\u00e1ssio e magn\u00e9sio, adicionando um precipitante alcalino para controlar o valor do pH a 8-10, e sob uma temperatura e press\u00e3o espec\u00edficas, fazer a co-precipita\u00e7\u00e3o de boro e magn\u00e9sio. Ap\u00f3s a separa\u00e7\u00e3o s\u00f3lido-l\u00edquido, adicionar NaOH ao licor-m\u00e3e para remo\u00e7\u00e3o profunda do magn\u00e9sio. Em seguida, adicionar carbonato de s\u00f3dio para preparar produtos de carbonato de l\u00edtio. A taxa de recupera\u00e7\u00e3o do l\u00edtio por este m\u00e9todo atinge 80%-90%.<\/p>\n<p>O <strong>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<p>O <strong>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<p>Com base no m\u00e9todo de co-precipita\u00e7\u00e3o de boro-l\u00edtio, a co-precipita\u00e7\u00e3o de boro-l\u00edtio \u00e9 efectuada utilizando o processo de congela\u00e7\u00e3o prim\u00e1ria, evapora\u00e7\u00e3o com halog\u00e9neo, evapora\u00e7\u00e3o prim\u00e1ria, congela\u00e7\u00e3o secund\u00e1ria, evapora\u00e7\u00e3o secund\u00e1ria e precipita\u00e7\u00e3o de boro-l\u00edtio. A taxa de recupera\u00e7\u00e3o de boro-l\u00edtio neste m\u00e9todo \u00e9 relativamente elevada e tem um forte car\u00e1cter pr\u00e1tico. O processo de precipita\u00e7\u00e3o foi desenvolvido anteriormente e tinha as vantagens de uma tecnologia de processo madura e alta confiabilidade operacional. No entanto, para o processo de produ\u00e7\u00e3o na China que utiliza salmoura de lago salgado com elevada rela\u00e7\u00e3o magn\u00e9sio-l\u00edtio como mat\u00e9ria-prima, o precipitante alcalino \u00e9 geralmente grande, o custo de produ\u00e7\u00e3o \u00e9 relativamente elevado e a seletividade elevada e fraca para o l\u00edtio e outros problemas.<\/p>\n<p>\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>&nbsp;<\/p>\n<h3><strong>Leitura alargada<br \/>\n<\/strong><\/h3>\n<p><a href=\"https:\/\/www.jxscmachine.com\/pt\/novo\/tecnologia-de-flotacao-de-minerio-de-litio\/\">Tecnologia de flota\u00e7\u00e3o de min\u00e9rio de l\u00edtio<\/a><br \/>\n<a href=\"https:\/\/www.jxscmachine.com\/pt\/solucoes\/fabrica-de-processamento-de-litio\/\">F\u00e1brica de processamento de l\u00edtio<\/a><br \/>\n<a href=\"https:\/\/www.jxscmachine.com\/pt\/novo\/5-metodos-de-beneficiacao-de-minas-de-litio\/\">Os 5 m\u00e9todos mais \u00fateis de beneficiamento na minera\u00e7\u00e3o de l\u00edtio<\/a><br \/>\n<a href=\"https:\/\/www.jxscmachine.com\/pt\/solucoes\/fabrica-de-processamento-de-lepidolite-10tph\/\">Planta de processamento de lepidolita 10TPH<\/a><\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>O m\u00e9todo de precipita\u00e7\u00e3o \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 consiste em utilizar a energia solar para evaporar e concentrar naturalmente as salmouras de lagos salgados. Depois de remover o boro, o c\u00e1lcio e ... <a href=\"https:\/\/www.jxscmachine.com\/pt\/new\/lithium-extraction-salt-lake-brine-precipitation-method\/\" class=\"more-link\">Continuar a ler <span class=\"screen-reader-text\">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":137,"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":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Lithium Extraction From Salt Lake Brine: Precipitation Method - JXSC Machine<\/title>\n<meta name=\"description\" content=\"The precipitation method is one of the common techniques used to extract lithium from salt lake brines. The process involves selectively precipitating lithium compounds from the brine solution through chemical reactions.\" \/>\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 - JXSC Machine\" \/>\n<meta property=\"og:description\" content=\"The precipitation method is one of the common techniques used to extract lithium from salt lake brines. The process involves selectively precipitating lithium compounds from the brine solution through chemical reactions.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.jxscmachine.com\/pt\/novo\/extracao-de-litio-metodo-de-precipitacao-de-salmoura-de-lago-salgado\/\" \/>\n<meta property=\"og:site_name\" content=\"JXSC Machine\" \/>\n<meta property=\"article:modified_time\" content=\"2023-05-31T06:31:29+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2023\/05\/Salt-Lake.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1254\" \/>\n\t<meta property=\"og:image:height\" content=\"662\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Tempo estimado de leitura\" \/>\n\t<meta name=\"twitter:data1\" content=\"5 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.jxscmachine.com\\\/new\\\/lithium-extraction-salt-lake-brine-precipitation-method\\\/\",\"url\":\"https:\\\/\\\/www.jxscmachine.com\\\/new\\\/lithium-extraction-salt-lake-brine-precipitation-method\\\/\",\"name\":\"Lithium Extraction From Salt Lake Brine: Precipitation Method - JXSC Machine\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.jxscmachine.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.jxscmachine.com\\\/new\\\/lithium-extraction-salt-lake-brine-precipitation-method\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.jxscmachine.com\\\/new\\\/lithium-extraction-salt-lake-brine-precipitation-method\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.jxscmachine.com\\\/wp-content\\\/uploads\\\/2023\\\/05\\\/Salt-Lake.jpg\",\"datePublished\":\"2023-05-31T06:29:27+00:00\",\"dateModified\":\"2023-05-31T06:31:29+00:00\",\"description\":\"The precipitation method is one of the common techniques used to extract lithium from salt lake brines. 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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.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.jxscmachine.com\/pt\/novo\/extracao-de-litio-metodo-de-precipitacao-de-salmoura-de-lago-salgado\/","og_locale":"pt_PT","og_type":"article","og_title":"Lithium Extraction From Salt Lake Brine: Precipitation Method - JXSC Machine","og_description":"The precipitation method is one of the common techniques used to extract lithium from salt lake brines. 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