{"id":21636,"date":"2023-11-15T14:06:00","date_gmt":"2023-11-15T06:06:00","guid":{"rendered":"https:\/\/www.jxscmachine.com\/?post_type=new&p=21636"},"modified":"2026-06-29T16:57:06","modified_gmt":"2026-06-29T08:57:06","slug":"facteurs-determinant-le-taux-de-recuperation-de-lor-par-amalgamation","status":"publish","type":"new","link":"https:\/\/www.jxscmachine.com\/fr\/new\/factors-determine-gold-amalgamation-recovery-rate\/","title":{"rendered":"Quels sont les facteurs qui d\u00e9terminent le taux de r\u00e9cup\u00e9ration de l'or par amalgamation ?"},"content":{"rendered":"

Amalgame d'or<\/strong> is a traditional method of extracting gold by binding it with mercury to form an amalgam, which is then heated to isolate pure gold. While historically significant, this process presents concerns due to mercury’s toxicity and environmental risks. The recovery rate\u2014the efficiency of gold extraction via amalgamation\u2014is influenced by multiple factors, including gold particle size, mercury quality, slurry concentration, pH levels, and temperature. Modern mining increasingly favors safer alternatives like cyanide leaching, but understanding amalgamation’s mechanics remains relevant for legacy operations and regulatory contexts.<\/p>\n

Qu'est-ce que l'amalgamation de l'or ?<\/h2>\n

Amalgame d'or<\/strong> is a method of extracting gold from its ores by mixing it with mercury. It is an ancient gold separation method. This process forms a amalgame or-mercure<\/a>Les particules d'or sont chimiquement li\u00e9es au mercure. L'amalgame est ensuite chauff\u00e9 pour vaporiser le mercure et laisser l'or. Cette technique a toujours \u00e9t\u00e9 utilis\u00e9e dans les mines d'or, en particulier dans les r\u00e9gions o\u00f9 l'or est finement diss\u00e9min\u00e9 dans le minerai et n'est pas facilement r\u00e9cup\u00e9rable par d'autres m\u00e9thodes.<\/p>\n

 <\/p>\n

\"l'or\"<\/a><\/p>\n

 <\/p>\n

 <\/p>\n

Taux de r\u00e9cup\u00e9ration de l'amalgame d'or<\/h2>\n

Les taux de r\u00e9cup\u00e9ration de l'amalgame d'or<\/strong> se r\u00e9f\u00e8re au pourcentage d'or qui peut \u00eatre r\u00e9cup\u00e9r\u00e9 avec succ\u00e8s par le processus d'amalgamation. Il mesure l'efficacit\u00e9 de la m\u00e9thode d'extraction de l'or qui consiste \u00e0 utiliser du mercure pour former un amalgame or-mercure.<\/p>\n

Le taux de r\u00e9cup\u00e9ration est calcul\u00e9 en comparant la quantit\u00e9 d'or r\u00e9cup\u00e9r\u00e9e par amalgamation \u00e0 la quantit\u00e9 totale d'or pr\u00e9sente dans le minerai ou le concentr\u00e9. Il est exprim\u00e9 en pourcentage et donne une id\u00e9e de l'efficacit\u00e9 du processus d'amalgamation pour capturer et extraire l'or de la mati\u00e8re premi\u00e8re.<\/p>\n

Un taux de r\u00e9cup\u00e9ration \u00e9lev\u00e9 indique qu'une plus grande proportion de l'or contenu dans le minerai est amalgam\u00e9e et r\u00e9cup\u00e9r\u00e9e avec succ\u00e8s. Un taux de r\u00e9cup\u00e9ration plus faible indique qu'une quantit\u00e9 importante d'or n'est pas r\u00e9cup\u00e9r\u00e9e ou est perdue au cours du processus. Les pratiques mini\u00e8res modernes visent \u00e0 maximiser les taux de r\u00e9cup\u00e9ration tout en minimisant les risques pour l'environnement et la sant\u00e9 li\u00e9s \u00e0 l'utilisation du mercure dans l'amalgamation de l'or.<\/p>\n

 <\/p>\n

Facteurs affectant le taux de r\u00e9cup\u00e9ration de l'or par amalgamation<\/h2>\n

Le taux de r\u00e9cup\u00e9ration de l'or lors de l'amalgamation au mercure d\u00e9pend des facteurs suivants the particle size and shape of natural gold, the color of gold particles, the quality of mercury, the mercury amalgamation temperature, the slurry concentration, the mercury amalgamation method, and equipment factors, etc.<\/strong><\/p>\n

1. Gold Particle Size and Shape<\/h3>\n

The particle size, shape, and monomer dissociation degree of gold are mainly related to the grinding operation. In particular, the degree of monomer dissociation has a more significant impact. Increasing the grinding fineness can improve the recovery rate of mercury amalgamation operations. Gold particles suitable for mercury amalgamation generally are 0.2-0.3 mm. The lower limit of the mercury amalgamation plate particle size in the grinding cycle is 0.015 mm, but the fine gold particles are lost with the slurry.<\/p>\n

2. La finesse des grains d'or<\/h3>\n

La couleur de l'or plac\u00e9rien est plus \u00e9lev\u00e9e que celle de l'or jaune. or filonien<\/a>, and the color of gold in the oxidation zone is higher than that of primary ore. Gold with a high color is prone to amalgamation with mercury. If the surface of gold particles is contaminated, their amalgamation ability will significantly reduce.<\/p>\n

3. M\u00e9thode d'amalgamation du mercure<\/h3>\n

L'amalgamation du mercure est divis\u00e9e en l'amalgame interne de mercure et l'amalgame externe de mercure.<\/strong> External mercury amalgamation is mixing mercury to extract gold outside the crushing chamber. External mercury amalgamation is commonly used in China with fixed and vibrating mercury amalgamation plates. Internal mercury amalgamation is performed outside the crushing chamber. During the grinding operation cycle, mercury amalgamation is used to extract gold. Gold mines in South Africa and the United States often use mercury amalgamation in ramming machines. Small and medium-sized gold mines in the Soviet Union often use disc rollers. In China, mercury amalgamation cylinders are often used. The efficiency of internal mercury amalgamation is higher than that of external mercury amalgamation, and the quality of mercury gold is good. The concentration of external amalgamated mercury slurry should not be too high to form a loose, thin slurry flow, and the flow rate should not be too high to allow gold particles to settle onto the mercury plate. The concentration of internal mercury slurry should be 30-50%, and the mercury should be suspended.<\/p>\n

 <\/p>\n

\"l'or\"<\/a><\/p>\n

 <\/p>\n

4. pH du lisier<\/h3>\n

Le pH de la boue a une grande influence sur l'effet d'amalgamation du mercure. L'effet d'amalgame du mercure est bon en milieu acide et dans les solutions de cyanure, mais lorsqu'il y a beaucoup de boue, le milieu acide ne peut pas agglom\u00e9rer la boue, et celle-ci contamine la surface des particules d'or, ce qui affecte l'effet d'amalgame du mercure. Lorsque le mercure est m\u00e9lang\u00e9 \u00e0 un milieu alcalin, par exemple en utilisant de la chaux comme r\u00e9gulateur pour pr\u00e9cipiter les sels solubles et \u00e9liminer les effets n\u00e9gatifs de la qualit\u00e9 de l'huile, l'impact du m\u00e9lange de mercure est meilleur lorsque le PH est compris entre 8 et 8,5.<\/p>\n

5. Masse de mercure<\/h3>\n

La qualit\u00e9 du mercure influence grandement l'effet de l'amalgamation au mercure. Le mercure pur ne permet pas de mouiller l'or. Le mercure contenant une petite quantit\u00e9 d'or, d'argent et de m\u00e9taux communs peut r\u00e9duire la tension superficielle du mercure et am\u00e9liorer l'effet de mouillage. L'huile de moteur, d'autres mati\u00e8res organiques et la boue fine contaminent la surface des particules d'or. Le minerai sulfur\u00e9, le talc, le graphite et l'ars\u00e9niure pr\u00e9sents dans le minerai adh\u00e8rent facilement \u00e0 la surface du mercure, ce qui affecte \u00e9galement la capacit\u00e9 de mouillage du mercure sur l'or.<\/p>\n

When mixing mercury, add an appropriate amount of mercury. Too much will reduce the elasticity and consistency of the mercury paste, causing the amalgam to be lost with the slurry. Insufficient addition of mercury makes the mercury paste hard and loses its elasticity, reducing its gold-capturing performance. After the mercury board is put into production, the initial mercury coating amount is 15-30 grams\/cubic meter, and mercury is added after 6-12 hours. The amount of mercury added is 2-5 times the gold content of the ore, and the consumption of mercury is usually 3-8 g\/ton of ore.<\/p>\n

 <\/p>\n

\"Taux<\/a><\/p>\n

6. Temp\u00e9rature d'amalgamation<\/h3>\n

In addition, temperature also affects the effect of mercury amalgamation. If the temperature is too low, it will increase the viscosity of mercury and affect the mercury amalgamation effect. If the temperature is too high, it will increase the fluidity of mercury, causing some of it to be lost. Therefore, the mercury amalgamation index is prone to seasonal changes. The mercury amalgamation temperature should generally be greater than 15 degrees. Adding mercury and adjusting the slurry concentration are used to eliminate the influence of temperature.<\/p>\n

 <\/p>\n

Conclusion: Balancing Efficiency and Sustainability<\/h2>\n

While amalgamation can achieve high recovery rates under optimal conditions, its reliance on toxic mercury demands caution. Modern alternatives such as cyanide leaching and gravity separation now dominate the industry, prioritizing environmental and worker safety. For operations still employing amalgamation, meticulous control of the above factors\u2014particle size, gold purity, method selection, slurry chemistry, mercury quality, and temperature\u2014is essential to maximize yields and minimize harm.<\/p>","protected":false},"excerpt":{"rendered":"

Gold amalgamation is a traditional method of extracting gold by binding it with mercury to form an amalgam, which is then heated to isolate pure gold. While historically significant, this process presents concerns due to mercury’s toxicity and environmental risks. The recovery rate\u2014the efficiency of gold extraction via amalgamation\u2014is influenced by multiple factors, including gold … Continuer la lecture de Quels sont les facteurs qui d\u00e9terminent le taux de r\u00e9cup\u00e9ration de l'or par amalgamation ?<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":21637,"parent":0,"menu_order":127,"comment_status":"closed","ping_status":"open","template":"","format":"standard","meta":{"_acf_changed":false,"ngg_post_thumbnail":0,"footnotes":""},"categories":[],"tags":[],"class_list":["post-21636","new","type-new","status-publish","format-standard","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"\nWhat Factors Determine Gold Amalgamation Recovery Rate? - JXSC Machine<\/title>\n<meta name=\"description\" content=\"Gold amalgamation recovery rate is influenced by gold particle size, mercury quality, slurry concentration, pH levels, and temperature.\" \/>\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\/facteurs-determinant-le-taux-de-recuperation-de-lor-par-amalgamation\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Factors Determine Gold Amalgamation Recovery Rate? 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