{"id":1457,"date":"2023-03-08T16:59:10","date_gmt":"2023-03-08T15:59:10","guid":{"rendered":"https:\/\/www.aucoffre.com\/academie\/?p=1457"},"modified":"2023-03-17T10:49:43","modified_gmt":"2023-03-17T09:49:43","slug":"recyclage-or-tout-savoir","status":"publish","type":"post","link":"https:\/\/www.aucoffre.com\/academie\/recyclage-or-tout-savoir\/","title":{"rendered":"Recyclage de l&rsquo;or : un processus complexe (mais indispensable)"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">M\u00e9tal pr\u00e9cieux et convoit\u00e9 s\u2019il en est, l\u2019or reste toutefois un mat\u00e9riau qu\u2019il est possible de recycler afin de le r\u00e9introduire dans l\u2019\u00e9conomie. Quels produits est-on capable de recycler ? Quels sont les proc\u00e9d\u00e9s qui permettent de donner une seconde vie au m\u00e9tal jaune ? Pourquoi est-il n\u00e9cessaire de recycler l\u2019or ? Zoom sur une industrie complexe mais n\u00e9cessaire.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quels objets en or peut-on recycler ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">L\u2019\u00e9ventail des objets dont il est possible d\u2019extraire et de recycler l\u2019or est plus large qu\u2019on ne le pense et celui-ci couvre plusieurs secteurs :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Le luxe et la joaillerie <\/strong>(bagues, colliers, boucles d\u2019oreille, bracelets).<br><\/li>\n\n\n\n<li><strong>L\u2019\u00e9lectronique <\/strong>(smartphones, \u00e9crans de t\u00e9l\u00e9vision, composants d\u2019ordinateur, certains CD et DVD).<br><\/li>\n\n\n\n<li><strong>Le textile et la d\u00e9coration<\/strong> (certains livres, v\u00eatements et verres color\u00e9s).<br><\/li>\n\n\n\n<li><strong>L\u2019automobile <\/strong>(pots catalytiques).<br><\/li>\n\n\n\n<li><strong>La sant\u00e9 <\/strong>(couronnes dentaires).<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Parce que les produits (smartphones, tablettes, ordinateurs) de l\u2019industrie \u00e9lectronique pr\u00e9sentent un cycle de vie tr\u00e8s court, ce secteur est un v\u00e9ritable gouffre pour la consommation d\u2019or. En outre, il est rare que les utilisateurs proc\u00e8dent \u00e0 la r\u00e9paration de leur mat\u00e9riel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Bon \u00e0 savoir <\/strong><strong>:<\/strong> Avec une tonne de composants \u00e9lectroniques d\u2019ordinateurs, on peut pr\u00e9lever jusqu\u2019\u00e0 230 grammes d\u2019or !<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Si d\u2019aucuns pourraient croire que l\u2019or recycl\u00e9 perd de sa valeur et de son attractivit\u00e9, <strong>de nombreux bijoutiers et joailliers vendent pourtant de l\u2019or recycl\u00e9 <\/strong>d\u2019une puret\u00e9 tout aussi \u00e9lev\u00e9e que celle qui caract\u00e9rise les produits neufs.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Comment l\u2019or est-il recycl\u00e9 ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Le recyclage de l\u2019or se d\u00e9roule en cinq \u00e9tapes principales :<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>R\u00e9colte<\/strong>. On pr\u00e9l\u00e8ve les objets compos\u00e9s (en tout ou partie) d\u2019or. <a href=\"https:\/\/www.loretlargent.info\/or\/ou-revendre-son-or\/\">De nombreuses agences sp\u00e9cialis\u00e9es<\/a> et autres organismes proposent \u00e0 leur client\u00e8le d\u2019acheter et de stocker cet or de seconde main.<\/li>\n<\/ol>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n<li><strong>Tri<\/strong>. L\u2019or est envoy\u00e9 en fonderie, o\u00f9 il sera tri\u00e9 par niveaux de puret\u00e9 selon son titrage ou selon le nombre de carats.<\/li>\n<\/ol>\n\n\n\n<ol class=\"wp-block-list\" start=\"3\">\n<li><strong>Fonte<\/strong>. L\u2019or est fondu \u00e0 une temp\u00e9rature d\u2019environ 1100\u00b0C. En effet, le point de fusion du m\u00e9tal jaune (passage de l\u2019\u00e9tat solide \u00e0 l\u2019\u00e9tat liquide) se situe pr\u00e9cis\u00e9ment \u00e0 1064,18\u00b0C. On r\u00e9cup\u00e8re ainsi l\u2019or sous sa forme brute.<\/li>\n<\/ol>\n\n\n\n<ol class=\"wp-block-list\" start=\"4\">\n<li><strong>Affinage<\/strong>. L\u2019or est ensuite extrait et s\u00e9par\u00e9 des autres m\u00e9taux auxquels il pouvait jusqu\u2019\u00e0 pr\u00e9sent \u00eatre m\u00e9lang\u00e9 (alliages) et d\u00e9barrass\u00e9 des \u00e9ventuelles impuret\u00e9s. On obtient ainsi un or pur \u00e0 99,9%, soit 24 carats.<\/li>\n<\/ol>\n\n\n\n<ol class=\"wp-block-list\" start=\"5\">\n<li><strong>Reconditionnement<\/strong>. L\u2019or pur est enfin moul\u00e9 <a href=\"https:\/\/www.loretlargent.info\/or\/quel-placement-en-or-choisir\/\">sous la forme de lingots d\u2019or ou de pi\u00e8ces d\u2019or<\/a> afin d\u2019\u00eatre r\u00e9introduit sur les march\u00e9s. Il circulera en tant qu\u2019or d\u2019investissement, dans des bijoux ou encore au sein de composants \u00e9lectroniques.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Recyclage de l\u2019or : quels d\u00e9fis ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Si le processus de recyclage de l\u2019or peut sembler complexe au premier abord, <strong>celui-ci est pourtant pratiqu\u00e9 depuis plusieurs mill\u00e9naires<\/strong>. \u00c0 l\u2019\u00e9poque par exemple, les pi\u00e8ces d\u2019or \u00e0 l\u2019effigie d\u2019un roi \u00e9taient fondues \u00e0 la fin de son r\u00e8gne pour remplacer son profil par celui de son successeur !<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00e9anmoins, recycler l\u2019or tout en conservant un produit pur de 24 carats en fin de proc\u00e9d\u00e9 demande une technologie bien plus avanc\u00e9e. Ce d\u00e9fi est d\u2019autant plus colossal qu\u2019il prend en compte la contrainte \u00e9cologique.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En effet, un tel processus s\u2019av\u00e8re :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>complexe ;<\/li>\n\n\n\n<li>co\u00fbteux ;<\/li>\n\n\n\n<li>et polluant jusqu\u2019\u00e0 il y a peu.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Aujourd\u2019hui, seuls 20% de l\u2019or fran\u00e7ais utilis\u00e9 est recycl\u00e9. En revanche, concernant les bijoux, leur quasi-totalit\u00e9 rejoint le circuit du recyclage.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<div class=\"jeg_video_container jeg_video_content\"><iframe title=\"BIJOUX : d\u00e9couvrez l&#039;offre OZE, l&#039;OR Z\u00c9RO EMPREINTE  | Acad\u00e9mie AuCOFFRE\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/hCSHa7fj8dc?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Pourquoi recycler l\u2019or ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">D\u2019un point de vue individualiste et pragmatique, la valeur \u00e9conomique de l\u2019or depuis la fin des accords de Bretton Woods suffit \u00e0 justifier son recyclage.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cette valorisation \u00e9conomique est renforc\u00e9e par la rar\u00e9faction des mines aurif\u00e8res (dont la disparition est pr\u00e9vue pour 2050), en parall\u00e8le d\u2019une demande industrielle toujours plus importante. L\u2019or est donc un m\u00e9tal pr\u00e9cieux qu\u2019il est judicieux de recycler et de conserver le plus longtemps possible.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En outre, le recyclage des mati\u00e8res premi\u00e8res comme le m\u00e9tal jaune permet \u00e0 un pays de <strong>pr\u00e9server ses stocks<\/strong> et donc sa souverainet\u00e9 \u00e9conomique, plut\u00f4t que d\u2019avoir recours \u00e0 l\u2019importation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mais le v\u00e9ritable enjeu du recyclage de l\u2019or est en fait \u00e9cologique : sans recours \u00e0 ce processus, seule l\u2019extraction permet de disposer de r\u00e9serves d\u2019or (pour l\u2019instant) suffisantes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Or, l\u2019extraction aurif\u00e8re est une pratique qui impacte consid\u00e9rablement la plan\u00e8te sous bien des aspects :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>ass\u00e8chement des sols ;<\/li>\n\n\n\n<li>pollution de l\u2019air ;<\/li>\n\n\n\n<li>contamination des eaux.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Et ce, en raison :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>des d\u00e9penses colossales en eau n\u00e9cessaire \u00e0 l\u2019extraction ;<\/li>\n\n\n\n<li>d\u2019une consommation \u00e9norme en carburant (pour le fonctionnement des machines) ;<\/li>\n\n\n\n<li>des besoins \u00e9lev\u00e9s en oxyde de soufre ;<\/li>\n\n\n\n<li>de lourdes \u00e9missions de d\u00e9chets miniers (cyanure, mercure et autres substances).<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tout cela, sans compter les pratiques ill\u00e9gales d\u2019orpaillage (recherche et exploitation d\u2019or dans les rivi\u00e8res) qui, elles aussi, d\u00e9truisent les sols et les eaux.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Malgr\u00e9 sa complexit\u00e9 et son co\u00fbt, le recyclage de l\u2019or n\u2019est aujourd\u2019hui plus une option pour sortir de l\u2019extraction aurif\u00e8re fr\u00e9n\u00e9tique et entretenir la circulation et l\u2019usage du m\u00e9tal jaune.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<div class=\"jeg_video_container jeg_video_content\"><iframe title=\"ACHETER SA PREMI\u00c8RE PI\u00c8CE D&#039;OR : faire le bon choix | AuCOFFRE\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/cX5JpC4pgsQ?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<\/div><\/figure>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button aligncenter\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.aucoffre.com\/oze-or-zero-empreinte\">D\u00e9couvrir OZE, l&rsquo;Or Z\u00e9ro Empreinte<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>M\u00e9tal pr\u00e9cieux et convoit\u00e9 s\u2019il en est, l\u2019or reste toutefois un mat\u00e9riau qu\u2019il est possible de recycler afin de le r\u00e9introduire dans l\u2019\u00e9conomie. Quels produits est-on capable de recycler ? Quels sont les proc\u00e9d\u00e9s qui permettent de donner une seconde vie au m\u00e9tal jaune ? Pourquoi est-il n\u00e9cessaire de recycler l\u2019or ? Zoom sur une [&hellip;]<\/p>\n","protected":false},"author":15,"featured_media":1458,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"content-type":"","jnews-multi-image_gallery":[],"jnews_single_post":{"subtitle":"","format":"standard","video":"","gallery":"","source_name":"","source_url":"","via_name":"","via_url":"","override_template":"0","override":[{"template":"1","single_blog_custom":"","parallax":"1","fullscreen":"1","layout":"right-sidebar","sidebar":"default-sidebar","second_sidebar":"default-sidebar","sticky_sidebar":"1","share_position":"top","share_float_style":"share-monocrhome","show_share_counter":"1","show_view_counter":"1","show_featured":"1","show_post_meta":"1","show_post_author":"1","show_post_author_image":"1","show_post_date":"1","post_date_format":"default","post_date_format_custom":"Y\/m\/d","show_post_category":"1","show_post_reading_time":"0","post_reading_time_wpm":"300","show_zoom_button":"0","zoom_button_out_step":"2","zoom_button_in_step":"3","show_post_tag":"1","show_prev_next_post":"1","show_popup_post":"1","number_popup_post":"1","show_author_box":"0","show_post_related":"0","show_inline_post_related":"0"}],"override_image_size":"0","image_override":[{"single_post_thumbnail_size":"crop-500","single_post_gallery_size":"crop-500"}],"trending_post":"0","trending_post_position":"meta","trending_post_label":"Trending","sponsored_post":"0","sponsored_post_label":"Sponsored by","sponsored_post_name":"","sponsored_post_url":"","sponsored_post_logo_enable":"0","sponsored_post_logo":"","sponsored_post_desc":"","disable_ad":"0"},"jnews_primary_category":{"id":""},"jnews_social_meta":{"fb_title":"","fb_description":"","fb_image":"","twitter_title":"","twitter_description":"","twitter_image":""},"jnews_override_counter":{"override_view_counter":"0","view_counter_number":"0","override_share_counter":"0","share_counter_number":"0","override_like_counter":"0","like_counter_number":"0","override_dislike_counter":"0","dislike_counter_number":"0"},"footnotes":""},"categories":[80],"tags":[141,97,91,83,89],"niveau":[130],"class_list":["post-1457","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-univers-metaux-precieux","tag-curiosite","tag-histoire","tag-investissement","tag-or","tag-pieces","niveau-debutant"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - 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