{"id":20738,"date":"2023-04-18T10:36:28","date_gmt":"2023-04-18T02:36:28","guid":{"rendered":"https:\/\/www.jxscmachine.com\/?post_type=new&#038;p=20738"},"modified":"2026-09-03T14:32:08","modified_gmt":"2026-09-03T06:32:08","slug":"processus-de-lixiviation-en-tas-du-minerai-dor","status":"publish","type":"new","link":"https:\/\/www.jxscmachine.com\/fr\/new\/gold-ore-heap-leaching-process\/","title":{"rendered":"Processus de lixiviation en tas du minerai d'or"},"content":{"rendered":"<p><strong>Gold ore heap leaching<\/strong> is a widely used <a href=\"https:\/\/www.jxscmachine.com\/fr\/nouveau\/processus-dextraction-de-lor\/\">processus d'extraction de l'or<\/a> for low-grade and suitably permeable gold ores. The basic heap leaching process involves crushing and preparing the ore, stacking it on a properly designed and lined leach pad, distributing a suitable leaching solution over the heap, and collecting the gold-bearing pregnant solution at the bottom for subsequent recovery. Compared with conventional gold processing methods, heap leaching generally requires less equipment and lower energy consumption, making it an economical option for certain low-grade gold deposits. However,<strong> the performance of gold ore heap leaching depends strongly on ore mineralogy, particle size, permeability, cyanide and oxygen conditions, solution distribution, drainage, and leaching temperature.<\/strong> Therefore, proper ore preparation, heap construction, irrigation, solution collection, and process control are essential for improving gold recovery and maintaining stable heap leaching operation.<\/p>\n<p>&nbsp;<\/p>\n<h2>What Is Gold Ore Heap Leaching?<\/h2>\n<p><a href=\"https:\/\/www.jxscmachine.com\/fr\/projet-de-minerai-epc\/lixiviation-en-tas\/\">Lixiviation en tas<\/a> is a process in which a prepared ore heap is irrigated with a suitable leaching solution. The solution passes through the ore under gravity, dissolving valuable components and carrying them into the collection system at the bottom of the heap.<\/p>\n<p>Depending on the characteristics of the ore and the storage method, heap leaching can generally be classified as:<\/p>\n<ul>\n<li><strong>Ore heap leaching:<\/strong>&nbsp;Used for crushed and prepared ore with sufficient permeability and suitable mineralogy.<\/li>\n<li><strong>Waste-rock heap leaching:<\/strong>&nbsp;Applied to low-grade waste or marginal material containing recoverable valuable metals.<\/li>\n<li><strong>Surface heap leaching:<\/strong>&nbsp;The ore is stacked on a prepared, lined surface and irrigated from above.<\/li>\n<li><strong>Permanent heap leaching:<\/strong>&nbsp;Ore is placed in a long-term leach pad or permanent storage area rather than being removed after each leaching cycle.<\/li>\n<\/ul>\n<p>La m\u00e9thode de lixiviation en tas est principalement utilis\u00e9e pour l'extraction du minerai de cuivre, du minerai d'uranium, du minerai d'or et du minerai de fer. <a href=\"https:\/\/www.jxscmachine.com\/fr\/solutions\/traitement-de-largent\/\">minerai d'argent<\/a>Il est \u00e9galement possible de traiter les scories de fonderie et les r\u00e9sidus des usines de traitement qui contiennent des ingr\u00e9dients utiles.<\/p>\n<p>La m\u00e9thode de lixiviation en tas se caract\u00e9rise par un processus simple, moins d'\u00e9quipement et une faible consommation d'\u00e9nergie, de sorte que l'investissement dans l'infrastructure et les co\u00fbts de production sont \u00e9galement faibles. Son principal inconv\u00e9nient est que le taux de lixiviation des composants pr\u00e9cieux du minerai est faible.<\/p>\n<p><a href=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2023\/04\/Gold-Ore-Heap-Leaching-Process.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-20739\" src=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2023\/04\/Gold-Ore-Heap-Leaching-Process.jpg\" alt=\"Processus de lixiviation en tas du minerai d&#039;or\" width=\"1200\" height=\"960\" srcset=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2023\/04\/Gold-Ore-Heap-Leaching-Process.jpg 1200w, https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2023\/04\/Gold-Ore-Heap-Leaching-Process-768x614.jpg 768w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/a><\/p>\n<h2>Pr\u00e9cautions \u00e0 prendre lors de la lixiviation en tas Extraction de l'or<\/h2>\n<p>&nbsp;<\/p>\n<h3>Am\u00e9lioration du processus de lixiviation en tas<\/h3>\n<p>&nbsp;<\/p>\n<h4>1. Application correcte de la technologie de granulation pour am\u00e9liorer la lixiviation de l'or<\/h4>\n<p>La pratique a montr\u00e9 que les mat\u00e9riaux \u00e0 grains fins et les minerais \u00e0 teneur en argile trop \u00e9lev\u00e9e ne conviennent pas \u00e0 la lixiviation en tas directe. Le pr\u00e9traitement par granulation est n\u00e9cessaire pour am\u00e9liorer la perm\u00e9abilit\u00e9 du tas de minerai avant la lixiviation en tas. Le pr\u00e9traitement par granulation peut renforcer consid\u00e9rablement la lixiviation du minerai. <a href=\"https:\/\/www.jxscmachine.com\/fr\/solutions\/traitement-de-lor\/\">l'or<\/a> and speed up the gold leaching rate. In most cases, it can also improve the gold leaching rate.<\/p>\n<p>La granulation utilise g\u00e9n\u00e9ralement de la chaux et du ciment comme liants, mais le dosage doit \u00eatre appropri\u00e9.<\/p>\n<p>&nbsp;<\/p>\n<h4>2. Optimize Heap Construction and Leaching Methods<\/h4>\n<p>Dans les pays \u00e9trangers, la production par lixiviation en tas n'adopte pas la m\u00e9thode d'un tas et d'un d\u00e9chargement, mais un parc de stockage permanent. En g\u00e9n\u00e9ral, le parc de stockage est choisi dans une vall\u00e9e ou un endroit avec une grande surface de fond. La m\u00e9thode de pulv\u00e9risation consistant \u00e0 construire alternativement des tas en couches, en cloisons ou en sections est adopt\u00e9e. Cette m\u00e9thode permet d'am\u00e9liorer consid\u00e9rablement les avantages \u00e9conomiques de l'entreprise.<\/p>\n<p>La perm\u00e9abilit\u00e9 au gaz du tas de minerai et la perm\u00e9abilit\u00e9 de la solution sont les facteurs cl\u00e9s qui d\u00e9terminent l'effet de la lixiviation en tas.<\/p>\n<p>Dans certaines mines nationales, des tubes de bambou et des b\u00e2tons de bois sont enterr\u00e9s dans le tas, et ces objets enterr\u00e9s sont retir\u00e9s apr\u00e8s une p\u00e9riode de lixiviation, de sorte que le tas de minerai se d\u00e9tache, et l'augmentation de la perm\u00e9abilit\u00e9 est propice \u00e0 la lixiviation du minerai d'or. Apr\u00e8s une p\u00e9riode de lixiviation du tas de minerai par l'institut de recherche, des explosions locales d'ameublissement ont \u00e9t\u00e9 utilis\u00e9es sur les parties gorg\u00e9es d'eau, ce qui a \u00e9galement jou\u00e9 un r\u00f4le dans l'ameublissement du tas de minerai et l'am\u00e9lioration de la perm\u00e9abilit\u00e9 ; en outre, des tuyaux perc\u00e9s de nombreux petits trous ont \u00e9t\u00e9 enterr\u00e9s dans le tas de minerai, remplissant le tuyau d'une solution de cyanure, et la solution de cyanure p\u00e9n\u00e8tre dans l'environnement par de petits trous ; diviser plusieurs zones au sommet du tas de minerai en fonction de la p\u00e9n\u00e9tration rapide, et fournir la solution de cyanure en fonction de la m\u00eame zone et du m\u00eame volume, de sorte que la solution de cyanure dans la zone \u00e0 p\u00e9n\u00e9tration lente Le volume du lixiviat est le m\u00eame que celui de la p\u00e9n\u00e9tration rapide, afin d'atteindre l'objectif d'infiltration uniforme du tas de minerai.<\/p>\n<p>&nbsp;<\/p>\n<h4>3. Improve Pregnant Solution Collection and Drainage<\/h4>\n<p>Laying rich liquid collection pipes at the bottom of the ore heap can speed up the flow of the solution, eliminate ore accumulation water, increase the gold leaching speed, and prevent the ore heap from collapsing and causing landslides. In foreign heap leaching production, the bottom of the ore heap is almost entirely covered with liquid collecting pipes. In the domestic heap leaching production of Shanghang Zijinshan Gold Mine in Fujian and Kanggur Gold Mine in Xinjiang, etc., they have designed and laid liquid collecting pipes by themselves, and the effect is good. No rich liquid is found around the heap leaching field. The effluent solution was also quite clear. The Comprehensive Institute of the Ministry of Geology and Mineral Resources also adopted this measure during granulation and heap leaching and achieved obvious results.<\/p>\n<p>&nbsp;<\/p>\n<figure id=\"attachment_26068\" aria-describedby=\"caption-attachment-26068\" style=\"width: 1000px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2023\/04\/Gold_Heap_Leaching_Optimization_Strategies.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-26068\" src=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2023\/04\/Gold_Heap_Leaching_Optimization_Strategies.jpg\" alt=\"gold heap leaching optimization strategies\" width=\"1000\" height=\"558\" srcset=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2023\/04\/Gold_Heap_Leaching_Optimization_Strategies.jpg 1000w, https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2023\/04\/Gold_Heap_Leaching_Optimization_Strategies-768x429.jpg 768w, https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2023\/04\/Gold_Heap_Leaching_Optimization_Strategies-18x10.jpg 18w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><figcaption id=\"caption-attachment-26068\" class=\"wp-caption-text\">gold heap leaching optimization strategies<\/figcaption><\/figure>\n<h4>4. Control Leaching Temperature<\/h4>\n<p>Les <a href=\"https:\/\/www.jxscmachine.com\/fr\/nouveau\/procede-dextraction-de-lor-par-cyanuration\/\">r\u00e9action de cyanuration<\/a> Dans les climats froids, les principaux probl\u00e8mes de la lixiviation en tas sont donc la solution et la temp\u00e9rature. Lorsque la temp\u00e9rature de lixiviation est inf\u00e9rieure \u00e0 10\u00b0C, le taux de dissolution de l'or chute fortement. Pour pallier ce probl\u00e8me et prolonger la saison de lixiviation en tas, la solution est d'abord chauff\u00e9e, puis envoy\u00e9e dans le tas de minerai.<\/p>\n<p>&nbsp;<\/p>\n<h4>5. Optimize Sprinkler and Drip Irrigation<\/h4>\n<p>Spraying and dripping are two different liquid distribution methods in the heap-leaching process. Both can produce a uniform liquid distribution effect, and uniform liquid distribution is one of the key factors in improving the gold leaching rate. The rotary swinging spray equipment widely used at home and abroad has the advantages of a large spraying area, uniform spraying liquid, no atomization, not easy to block, and convenient loading and unloading. The loss and wind entrainment loss are relatively large.<\/p>\n<p><strong>Drip leaching<\/strong> is suitable for heap leaching production under the natural conditions of drought, high temperature, strong wind, and water shortage in the Gobi desert area. Due to the unique advantages of drip leaching equipment, it has been widely used abroad. For example, 80% of heap leaching in the United States uses the drip method used to extract gold; with the success of the Saidu Gold Mine&#8217;s first application of drip equipment in my country, the trickle technology is also gradually popularized and applied in my country.<\/p>\n<p>L'investissement dans l'\u00e9gouttage est inf\u00e9rieur de 40% \u00e0 celui de l'\u00e9quipement de pulv\u00e9risation, l'\u00e9vaporation de la solution est r\u00e9duite de 27% \u00e0 6%, le pic de lixiviation de l'or appara\u00eet une semaine plus t\u00f4t et la dur\u00e9e de lixiviation est r\u00e9duite de 109d \u00e0 72d. Le taux de lixiviation est pass\u00e9 de 70,5% \u00e0 78,6%.<\/p>\n<p>&nbsp;<\/p>\n<h3>Am\u00e9liorer l'environnement de travail de l'agent et am\u00e9liorer la lixiviation du minerai d'or<\/h3>\n<p>&nbsp;<\/p>\n<h4>Application of Leaching Aids<\/h4>\n<p>Oxygen plays an extremely important role in the cyanidation process, and the use of oxidants is an important technical measure to improve gold ore heap leaching. Batt studied the promotion of barium, strontium, and calcium peroxides on cyanide leaching, and found that they can release oxygen into the solution. For example, for some ores, when adding 1.5kg\/Ca0p, the heap leaching process can be sped up by 20 d.<\/p>\n<p>An appropriate amount of impregnating or wetting agent is added to the cyanide solution to facilitate the penetration of the cyanide solution and react with the wrapped gold. Pre-alkali treatment before heap leaching can reduce the influence of harmful gold ions on cyanide leaching, reduce the amount of cyanide, and maximize the gold leaching rate. Multi-stage leaching can obtain precious liquid with a gold content of up to 4ppm, significantly higher than single-stage heap leaching.<\/p>\n<p>&nbsp;<\/p>\n<h2>Conclusion<\/h2>\n<p>Gold ore heap leaching is a relatively simple and cost-effective method for recovering gold from suitable low-grade ores, but achieving a high gold leaching rate requires careful control of the entire heap leaching process. Key factors include <strong>appropriate crushing and granulation, good ore heap permeability, uniform sprinkler or drip irrigation, efficient pregnant solution collection and drainage, suitable leaching temperature, and adequate oxygen and reagent conditions.<\/strong> In particular, improving solution distribution and maintaining good gas and liquid permeability can significantly enhance the contact between the leaching solution and gold-bearing minerals. For ores containing high clay content, fine particles, or other characteristics that restrict solution flow, pretreatment and process optimization are especially important. By selecting the appropriate heap construction method and leaching conditions according to the ore characteristics, mining operations can improve gold recovery, shorten the leaching cycle, reduce reagent and energy consumption, and achieve more stable and economical gold ore heap leaching results.<\/p>","protected":false},"excerpt":{"rendered":"<p>Gold ore heap leaching is a widely used gold extraction process for low-grade and suitably permeable gold ores. The basic heap leaching process involves crushing and preparing the ore, stacking it on a properly designed and lined leach pad, distributing a suitable leaching solution over the heap, and collecting the gold-bearing pregnant solution at the &hellip; <a href=\"https:\/\/www.jxscmachine.com\/fr\/new\/gold-ore-heap-leaching-process\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Processus de lixiviation en tas du minerai d'or<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":20739,"parent":0,"menu_order":155,"comment_status":"closed","ping_status":"open","template":"","format":"standard","meta":{"_acf_changed":false,"ngg_post_thumbnail":0,"footnotes":""},"categories":[],"tags":[],"class_list":["post-20738","new","type-new","status-publish","format-standard","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Gold Ore Heap Leaching Process - 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