{"id":3658,"date":"2018-10-25T13:41:12","date_gmt":"2018-10-25T05:41:12","guid":{"rendered":"http:\/\/www.jxscmachine.com\/?post_type=new&#038;p=3658"},"modified":"2026-06-04T15:11:59","modified_gmt":"2026-06-04T07:11:59","slug":"lexploitation-de-lor-en-roche-dure","status":"publish","type":"new","link":"https:\/\/www.jxscmachine.com\/fr\/new\/hard-rock-gold-mining\/","title":{"rendered":"Extraction d'or en roche dure"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><div class=\"vc_row wpb_row vc_row-fluid\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>This in-depth guide explores the complete process of hard rock (lode) gold mining &#8211; from geological formation and global deposits to extraction methods and processing technologies. We cover the characteristics of rock gold deposits, modern exploration techniques, and the three primary processing methods: <strong>gravity separation, flotation, and cyanide leaching.<\/strong> The article also examines essential mining equipment and real-world case studies from major gold-producing regions. Whether you&#8217;re a mining professional, investor, or geology enthusiast, this comprehensive overview provides valuable insights into the fascinating world of hard rock gold production.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<h2 style=\"color: #1e73be;text-align: center;font-family:Average Sans;font-weight:400;font-style:normal\" class=\"vc_custom_heading vc_do_custom_heading vc_custom_1780552749518\" >Hard Rock Gold<\/h2>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p><strong>L'or en roche dure<\/strong> is also called mineral gold, which is produced in mines. Gold deposits, mostly deposited by hot springs gushing out of the ground through cracks in the rocks, are often associated with quartz in cracks in the rocks. Most of the gold deposits are associated with other metals, including silver, platinum, zinc, and other metals besides gold, which was called composite gold before other metals were put forward. Ore gold occurs in different mines and contains different components of other metals, so the fineness varies from 50% to 90%.<\/p>\n<p>According to the structural state and gold content of gold in minerals, the minerals of gold deposits can be divided into three categories: <strong>gold ore, gold-bearing minerals, and gold-carrying minerals.<\/strong> The so-called independent mineral of gold refers to the gold produced in the form of gold minerals and gold-bearing minerals. It is the most important form of occurrence of gold in nature and the main object of industrial development and utilization. So far, 98 kinds of gold minerals and gold-bearing minerals have been found in the world, but only 47 kinds are common, while only 10 kinds of minerals are directly used by industry.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n\n\t<div  class=\"wpb_single_image wpb_content_element vc_align_center wpb_content_element\">\n\t\t\n\t\t<figure class=\"wpb_wrapper vc_figure\">\n\t\t\t<div class=\"vc_single_image-wrapper   vc_box_border_grey\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"482\" src=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2019\/07\/rock-gold-and-placer-gold-deposit.jpg\" class=\"vc_single_image-img attachment-full\" alt=\"gisement d&#039;or de roche et d&#039;or plac\u00e9rien\" title=\"gisement d&#039;or de roche et d&#039;or plac\u00e9rien\" srcset=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2019\/07\/rock-gold-and-placer-gold-deposit.jpg 800w, https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2019\/07\/rock-gold-and-placer-gold-deposit-300x181.jpg 300w, https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2019\/07\/rock-gold-and-placer-gold-deposit-768x463.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/div>\n\t\t<\/figure>\n\t<\/div>\n<div id=\"ultimate-heading-52506a4d960b76fdb\" class=\"uvc-heading ult-adjust-bottom-margin ultimate-heading-52506a4d960b76fdb uvc-9175\" data-hspacer=\"no_spacer\"  data-halign=\"left\" style=\"text-align:left\"><div class=\"uvc-heading-spacer no_spacer\" style=\"top\"><\/div><div class=\"uvc-main-heading ult-responsive\"  data-ultimate-target='.uvc-heading.ultimate-heading-52506a4d960b76fdb h3'  data-responsive-json-new='{\"font-size\":\"\",\"line-height\":\"\"}' ><h3 style=\"font-weight:normal;color:#dd9933;margin-bottom:10px;\">How to Find The Rock Gold Ore Deposit?<\/h3><\/div><\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>The easiest way to find rock gold on land or underground is with a rock <strong>gold detector. <\/strong>This machine is operated manually; it is very popular among small rock gold miners. They try to find rock gold or other metals underground, dig up the rock gold ore, then separate out rock gold using a small sluice box and washing machine.<\/p>\n<p>For a large-scale rock gold mining plant, a big rock gold detection machine is used to find the exact rock gold mine position and blast the rock gold stone out. Then send it to the next <a href=\"https:\/\/www.jxscmachine.com\/fr\/nouveau\/lexploitation-de-lor-en-roche-dure\/\">rock gold processing plant<\/a>.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<div id=\"ultimate-heading-61976a4d960b77045\" class=\"uvc-heading ult-adjust-bottom-margin ultimate-heading-61976a4d960b77045 uvc-5805\" data-hspacer=\"no_spacer\"  data-halign=\"left\" style=\"text-align:left\"><div class=\"uvc-heading-spacer no_spacer\" style=\"top\"><\/div><div class=\"uvc-main-heading ult-responsive\"  data-ultimate-target='.uvc-heading.ultimate-heading-61976a4d960b77045 h3'  data-responsive-json-new='{\"font-size\":\"\",\"line-height\":\"\"}' ><h3 style=\"font-weight:normal;color:#dd9933;margin-bottom:10px;\">Rock Gold Ore Worldwide Distribution<\/h3><\/div><\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>Le minerai d'or de roche est tr\u00e8s riche en Afrique et en Am\u00e9rique du Sud, notamment au Mali, au Soudan, en Tanzanie, au Mozambique, au Suriname, au Ghana, au Congo, au Zimbabwe, en Zambie, en \u00c9thiopie, au P\u00e9rou, au Chili, en Bolivie, en Australie, en Am\u00e9rique, etc.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<h2 style=\"color: #1e73be;text-align: center;font-family:Average Sans;font-weight:400;font-style:normal\" class=\"vc_custom_heading vc_do_custom_heading vc_custom_1780554024087\" >Processus de s\u00e9paration par gravit\u00e9 des minerais d'or<\/h2>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p><strong>Gravity Separation for Hard Rock Gold Mining<\/strong><br \/>\nO\u00f9 aller <a href=\"https:\/\/www.jxscmachine.com\/fr\/categorie\/concasseur-de-roches\/\">buy an ore crusher machine<\/a>?<\/p>\n<ul>\n<li><strong>\u00c9tape de concassage et de broyage<\/strong><br \/>\nThe extracted ore should be crushed by a jaw crusher initially and then by the fine crusher. When it gets the reasonable fineness, it is transported into a ball mill by an elevating conveyor and feeder and is milled by the <a href=\"https:\/\/www.jxscmachine.com\/fr\/concasseur-de-roches\/broyeur-a-boulets\/\">broyeur \u00e0 boulets<\/a>.&nbsp;<\/li>\n<li><strong>Phase de classification<\/strong><br \/>\nThe finely milled ore goes to the next procedure: classification. There is a theory that if the weights of solid particles are different, the sedimentation will be different, and the mixed ore can be classified by a spiral classifier\/screw classifier.&nbsp;<\/li>\n<li><strong>\u00c9tape d'am\u00e9lioration<\/strong><br \/>\nThe superfine particles from the ball mill will feed into a shaking table through the hydraulic classifiers, which can ensure different size distribution ore\/slurry feed into different riffles on the shaking table, in order to reach a higher recovery ratio.<br \/>\nJXSC Shaking Table is one of our flagship mining equipment with more than 30 years of experience. It has a very high recovery rate, up to 95%, high recovery rate which widely used to concentrate free gold.<\/li>\n<li><strong>\u00c9tape d'affinage de l'or<\/strong><br \/>\n<a href=\"https:\/\/www.jxscmachine.com\/fr\/machine-daffinage-de-lor\/distillateur-dor\/\">Mercury Distiller<\/a>\/Gold Amalgamator is a traditional gold refining machine, widely used to mix mercury and gold concentrate in order to get pure gold; then we can use a <a href=\"https:\/\/www.jxscmachine.com\/fr\/categorie\/equipement-de-fusion-de-lor\/\">gold melting furnace<\/a> to produce a gold bar.<\/li>\n<\/ul>\n\n\t\t<\/div>\n\t<\/div>\n\n\t<div  class=\"wpb_single_image wpb_content_element vc_align_center wpb_content_element\">\n\t\t\n\t\t<figure class=\"wpb_wrapper vc_figure\">\n\t\t\t<div class=\"vc_single_image-wrapper   vc_box_border_grey\"><img loading=\"lazy\" decoding=\"async\" width=\"750\" height=\"1061\" src=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2018\/10\/rock-gold-gravity-processing-plant.jpg\" class=\"vc_single_image-img attachment-full\" alt=\"usine de traitement par gravit\u00e9 de l&#039;or en roche\" title=\"usine de traitement par gravit\u00e9 de l&#039;or en roche\" srcset=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2018\/10\/rock-gold-gravity-processing-plant.jpg 750w, https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2018\/10\/rock-gold-gravity-processing-plant-212x300.jpg 212w, https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2018\/10\/rock-gold-gravity-processing-plant-724x1024.jpg 724w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/div>\n\t\t<\/figure>\n\t<\/div>\n<h2 style=\"color: #1e73be;text-align: center;font-family:Average Sans;font-weight:400;font-style:normal\" class=\"vc_custom_heading vc_do_custom_heading vc_custom_1780555160770\" >Processus de flottation de l'or<\/h2>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p><strong>Processus de flottation pour l'extraction de l'or en roche dure<\/strong><br \/>\nO\u00f9 aller <a href=\"https:\/\/www.jxscmachine.com\/fr\/equipement-de-flottation\/machine-de-flottation\/\">buy a gold flotation machine<\/a>?<\/p>\n<ul>\n<li><strong>\u00c9tape de concassage et de broyage<\/strong><\/li>\n<li>Les<strong> classifying stage<\/strong> is the same as the gravity process.<\/li>\n<li><strong>\u00c9tape de m\u00e9lange et de flottation<\/strong><br \/>\nThe classified ore gets into a <a href=\"https:\/\/www.jxscmachine.com\/fr\/equipement-de-flottation\/reservoir-de-melange\/\">r\u00e9servoir de m\u00e9lange<\/a> for full mixing. At this stage, the chemical agent for foam can be added. After full mixing, the slurry will enter a flotation machine.<br \/>\nWhen the flotation machine works, the motor drives the impeller to revolve, so the centrifugal effect and negative pressure are produced. On one hand, ample air is absorbed and mixed with mineral slurry; on the other hand, the mixed mineral slurry is mingled with an additive. Meanwhile, the foams are thinned, the mineral is bound with foams, and floats up to the surface of the mineral slurry, and the mineralized foam is formed. The liquid surface can be adjusted with the height of the adjustment flashboard so that the useful foams are scraped with a squeegee.<\/li>\n<li><strong>\u00c9paississement et s\u00e9chage du concentrateur<\/strong><br \/>\nThen gold is separated from others. Since the separated ore is wet, it should be dewatered by thickening initially and dried by a <a href=\"https:\/\/www.jxscmachine.com\/fr\/machine-de-deshydratation\/secheur-rotatif\/\">s\u00e9choir<\/a>.<\/li>\n<\/ul>\n\n\t\t<\/div>\n\t<\/div>\n\n\t<div  class=\"wpb_single_image wpb_content_element vc_align_center wpb_content_element\">\n\t\t\n\t\t<figure class=\"wpb_wrapper vc_figure\">\n\t\t\t<div class=\"vc_single_image-wrapper   vc_box_border_grey\"><img loading=\"lazy\" decoding=\"async\" width=\"1142\" height=\"652\" src=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2018\/10\/Flotation-Process-for-Hard-Rock-Gold-Mining.jpg\" class=\"vc_single_image-img attachment-full\" alt=\"Processus de flottation pour l&#039;extraction de l&#039;or en roche dure\" title=\"Processus de flottation pour l&#039;extraction de l&#039;or en roche dure\" srcset=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2018\/10\/Flotation-Process-for-Hard-Rock-Gold-Mining.jpg 1142w, https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2018\/10\/Flotation-Process-for-Hard-Rock-Gold-Mining-300x171.jpg 300w, https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2018\/10\/Flotation-Process-for-Hard-Rock-Gold-Mining-768x438.jpg 768w, https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2018\/10\/Flotation-Process-for-Hard-Rock-Gold-Mining-1024x585.jpg 1024w\" sizes=\"auto, (max-width: 1142px) 100vw, 1142px\" \/><\/div>\n\t\t<\/figure>\n\t<\/div>\n<h2 style=\"color: #1e73be;text-align: center;font-family:Average Sans;font-weight:400;font-style:normal\" class=\"vc_custom_heading vc_do_custom_heading vc_custom_1780555634703\" >Processus de lixiviation de l'or<\/h2>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p><strong>Lixiviation et adsorption pour l'extraction de l'or en roche dure<\/strong><br \/>\nLa boue de minerai broy\u00e9 et de chaux passe dans une s\u00e9rie de six cuves de lixiviation o\u00f9 une solution de cyanure de sodium est ajout\u00e9e. Les cuves offrent un temps de r\u00e9tention suffisant pour permettre \u00e0 l'or et \u00e0 l'argent d'\u00eatre dissous par la solution de cyanure. De l'oxyg\u00e8ne est ajout\u00e9 pour faciliter ce processus.<\/p>\n<p>The slurry then moves through a series of carbon adsorption tanks. While the leaching process continues in these tanks, the primary objective is to remove the gold and silver from the solution. To achieve this, carbon is fed through the tanks and the gold and silver adsorb (attach) to the carbon granules. Carbon is heated to 600 degrees C and fed into the circuit in the opposite direction to the slurry flow, moving from the last adsorption tank to the first. This is because the gold and silver move towards the carbon via a diffusive process. It is necessary to have fresh carbon at the end of the chain to scalp the gold and silver that has not been removed in the previous tanks.<\/p>\n<p>By the time the slurry reaches the final adsorption tank, most of the precious metals have been removed. The barren slurry, now known as tailings, is pumped to the tailings storage facility. In contrast, by the time the carbon reaches the first adsorption tank, it has recovered most of the gold and silver from solution. This &#8220;loaded&#8221; carbon is then pumped to the elution circuit where the gold and silver are washed off with superheated water. The washed solution, called pregnant eluate, is passed to the electrowinning circuit. The remaining barren carbon is reactivated by acid washing and kilning and returned to the adsorption tanks.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n\n\t<div  class=\"wpb_single_image wpb_content_element vc_align_center wpb_content_element\">\n\t\t\n\t\t<figure class=\"wpb_wrapper vc_figure\">\n\t\t\t<div class=\"vc_single_image-wrapper   vc_box_border_grey\"><img loading=\"lazy\" decoding=\"async\" width=\"585\" height=\"763\" src=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2018\/10\/Leaching-and-Adsorption-for-Hard-Rock-Gold-Mining.jpg\" class=\"vc_single_image-img attachment-full\" alt=\"Lixiviation et adsorption pour l&#039;extraction de l&#039;or en roche dure\" title=\"Lixiviation et adsorption pour l&#039;extraction de l&#039;or en roche dure\" srcset=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2018\/10\/Leaching-and-Adsorption-for-Hard-Rock-Gold-Mining.jpg 585w, https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2018\/10\/Leaching-and-Adsorption-for-Hard-Rock-Gold-Mining-230x300.jpg 230w\" sizes=\"auto, (max-width: 585px) 100vw, 585px\" \/><\/div>\n\t\t<\/figure>\n\t<\/div>\n<h2 style=\"color: #1e73be;text-align: center;font-family:Average Sans;font-weight:400;font-style:normal\" class=\"vc_custom_heading vc_do_custom_heading vc_custom_1780556389252\" >Cas d'exploitation de l'or en roche<\/h2>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p><strong>JXSCmine Machinery Company<\/strong> in China has more than 40 years of professional experience in the rock gold process, designs a<em>&nbsp;full set of rock gold ore process flowcharts<\/em>, provides a complete set of <em>machines de s\u00e9paration du minerai d'or<\/em>, and can send an engineer to the mine site for equipment installation and commissioning guidance. Have already built many gold ore processing plants in African countries. Including Mali, Sudan, Mozambique, Suriname, Ghana, Congo, Zimbabwe, Zambia, Tanzania, Ethiopia, Peru, Chile, Bolivia, Australia, etc.<\/p>\n<p><strong>The following are the gold processing solution cases:<\/strong><\/p>\n<p class=\"entry-title\"><a href=\"https:\/\/www.jxscmachine.com\/fr\/cas\/30tph-rock-gold-processing-plant-in-australia\/\" rel=\"bookmark\">30TPH Rock Gold Processing Plant In Australia<\/a><\/p>\n<p class=\"entry-title\"><a href=\"https:\/\/www.jxscmachine.com\/fr\/cas\/5tph-alluvial-gold-and-1tph-rock-gold-processing-plant-in-niger\/\" rel=\"bookmark\">5TPH Alluvial Gold and 1TPH Rock Gold Processing Plant in Niger<\/a><\/p>\n<p class=\"entry-title\"><a href=\"https:\/\/www.jxscmachine.com\/fr\/cas\/50-tph-rock-gold-processing-plant-in-malaysia\/\" rel=\"bookmark\">50 TPH Rock Gold Processing Plant in Malaysia<\/a><\/p>\n<p class=\"entry-title\"><a href=\"https:\/\/www.jxscmachine.com\/fr\/cas\/30-tph-rock-gold-processing-in-congo\/\" rel=\"bookmark\">30 TPH Rock Gold Processing in Congo<\/a><\/p>\n<p><a href=\"https:\/\/www.jxscmachine.com\/fr\/cas\/100tph-diamond-washing-plant-south-africa-3\/\">Usine de traitement de l'or en roche 20TPH au Mozambique<\/a><\/p>\n<p class=\"entry-title\"><a href=\"https:\/\/www.jxscmachine.com\/fr\/cas\/300tpd12tph-rock-gold-cip-processing-plant-kenya\/\" rel=\"bookmark\">300TPD(12TPH) Usine de traitement CIP de l'or de roche au Kenya<\/a><\/p>\n<p><a href=\"https:\/\/www.jxscmachine.com\/fr\/cas\/usine-de-traitement-de-lor-alluvial-100tph\/\">100TPH Alluvial Gold &amp; Rock Gold Processing Plant in Congo<\/a><\/p>\n<p>&nbsp;<\/p>\n\n\t\t<\/div>\n\t<\/div>\n\n\t<div  class=\"wpb_single_image wpb_content_element vc_align_center wpb_content_element\">\n\t\t\n\t\t<figure class=\"wpb_wrapper vc_figure\">\n\t\t\t<div class=\"vc_single_image-wrapper   vc_box_border_grey\"><img loading=\"lazy\" decoding=\"async\" width=\"517\" height=\"355\" src=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2018\/04\/Rock-Gold-Mining-Process-Methods1.jpg\" class=\"vc_single_image-img attachment-full\" alt=\"M\u00e9thodes d&#039;extraction de l&#039;or de roche\" title=\"M\u00e9thodes de traitement de l&#039;or de roche1\" srcset=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2018\/04\/Rock-Gold-Mining-Process-Methods1.jpg 517w, https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2018\/04\/Rock-Gold-Mining-Process-Methods1-300x206.jpg 300w\" sizes=\"auto, (max-width: 517px) 100vw, 517px\" \/><\/div>\n\t\t<\/figure>\n\t<\/div>\n<\/div><\/div><\/div><\/div><div class=\"vc_row wpb_row vc_row-fluid\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><h2 style=\"color: #1e73be;text-align: center;font-family:Average Sans;font-weight:400;font-style:normal\" class=\"vc_custom_heading vc_do_custom_heading vc_custom_1780556801932\" >Conclusion and Key Takeaways<\/h2>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p><strong>Resource Significance:<\/strong> Hard rock deposits represent the primary source of global gold supply<br \/>\n<strong>Technological Advances:<\/strong> Modern methods achieve &gt;90% recovery rates<br \/>\nOperational Flexibility: Multiple processing options accommodate varying ore types<br \/>\n<strong>Global Industry:<\/strong> Production spans all inhabited continents<br \/>\n<strong>Economic Impact:<\/strong> Major contributor to many national economies<br \/>\nFor mining operations, proper method selection depends on comprehensive ore testing and economic evaluation. The future of hard rock gold mining lies in sustainable practices, efficiency improvements, and technological innovation to profitably access deeper deposits and lower-grade ores.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Jiangxi Shicheng Mine Machinery Factory est l'un des principaux fabricants de machines d'exploitation mini\u00e8re et d'ensembles complets de petites machines d'exploitation mini\u00e8re de laboratoire.<\/p>","protected":false},"author":1,"featured_media":4421,"parent":0,"menu_order":360,"comment_status":"open","ping_status":"open","template":"","format":"standard","meta":{"_acf_changed":false,"ngg_post_thumbnail":0,"footnotes":""},"categories":[],"tags":[],"class_list":["post-3658","new","type-new","status-publish","format-standard","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Hard Rock Gold Mining - JXSC Machine<\/title>\n<meta name=\"description\" content=\"It covers rock gold deposits&#039; characteristics, mining, and primary processing methods: gravity separation, flotation, and cyanide leaching.\" \/>\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\/lexploitation-de-lor-en-roche-dure\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hard Rock Gold Mining - JXSC Machine\" \/>\n<meta property=\"og:description\" content=\"It covers rock gold deposits&#039; characteristics, mining, and primary processing methods: gravity separation, flotation, and cyanide leaching.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.jxscmachine.com\/fr\/nouveau\/lexploitation-de-lor-en-roche-dure\/\" \/>\n<meta property=\"og:site_name\" content=\"JXSC Machine\" \/>\n<meta property=\"article:modified_time\" content=\"2026-06-04T07:11:59+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2018\/10\/Flotation-Process-for-Hard-Rock-Gold-Mining.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1142\" \/>\n\t<meta property=\"og:image:height\" content=\"652\" \/>\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=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"8 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.jxscmachine.com\\\/new\\\/hard-rock-gold-mining\\\/\",\"url\":\"https:\\\/\\\/www.jxscmachine.com\\\/new\\\/hard-rock-gold-mining\\\/\",\"name\":\"Hard Rock Gold Mining - 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