{"id":9253,"date":"2026-10-21T13:33:16","date_gmt":"2026-10-21T05:33:16","guid":{"rendered":"https:\/\/www.recycle-plant.com\/?post_type=info&#038;p=9253"},"modified":"2026-10-21T15:02:57","modified_gmt":"2026-10-21T07:02:57","slug":"aluminum-separation-in-pet-recycling","status":"publish","type":"info","link":"https:\/\/www.recycle-plant.com\/fr\/aluminum-separation-in-pet-recycling.html","title":{"rendered":"Easy\u00a0Aluminum\u00a0Separation\u00a0in\u00a0PET\u00a0Recycling\u00a0Lines"},"content":{"rendered":"<p class=\"wp-block-paragraph\">There is a hidden enemy that standard magnets completely ignore: aluminum.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Post-consumer bottles are covered in aluminum twist-off caps (from wine and liquor bottles), thin foil seals on juice containers, and tiny brass springs inside soap dispensers. Because aluminum and brass are non-magnetic, they slide right under the magnet and enter the cutting room.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Without effective aluminum separation in PET recycling, these metal pieces travel straight into your extruder, scratching expensive screws and causing tens of thousands of dollars in breakdown repairs.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"540\" data-id=\"9254\" src=\"https:\/\/www.recycle-plant.com\/wp-content\/uploads\/2026\/10\/Aluminum-Separation-in-PET-Recycling-Lines.webp\" alt=\"Aluminum\u00a0Separation\u00a0in\u00a0PET\u00a0Recycling\u00a0Lines\" class=\"wp-image-9254\" srcset=\"https:\/\/www.recycle-plant.com\/wp-content\/uploads\/2026\/10\/Aluminum-Separation-in-PET-Recycling-Lines.webp 720w, https:\/\/www.recycle-plant.com\/wp-content\/uploads\/2026\/10\/Aluminum-Separation-in-PET-Recycling-Lines-360x270.webp 360w, https:\/\/www.recycle-plant.com\/wp-content\/uploads\/2026\/10\/Aluminum-Separation-in-PET-Recycling-Lines-180x135.webp 180w, https:\/\/www.recycle-plant.com\/wp-content\/uploads\/2026\/10\/Aluminum-Separation-in-PET-Recycling-Lines-16x12.webp 16w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">Aluminum&nbsp;Separation&nbsp;in&nbsp;PET&nbsp;Recycling&nbsp;Lines<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"540\" data-id=\"9255\" src=\"https:\/\/www.recycle-plant.com\/wp-content\/uploads\/2026\/10\/Easy-Aluminum-Separation.webp\" alt=\"Easy\u00a0Aluminum\u00a0Separation\" class=\"wp-image-9255\" srcset=\"https:\/\/www.recycle-plant.com\/wp-content\/uploads\/2026\/10\/Easy-Aluminum-Separation.webp 720w, https:\/\/www.recycle-plant.com\/wp-content\/uploads\/2026\/10\/Easy-Aluminum-Separation-360x270.webp 360w, https:\/\/www.recycle-plant.com\/wp-content\/uploads\/2026\/10\/Easy-Aluminum-Separation-180x135.webp 180w, https:\/\/www.recycle-plant.com\/wp-content\/uploads\/2026\/10\/Easy-Aluminum-Separation-16x12.webp 16w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">Easy&nbsp;Aluminum&nbsp;Separation<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">The Common Mistake: &#8220;Won&#8217;t the Water Tank Catch the Aluminum?&#8221;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Many beginners ask: <em>&#8220;Can&#8217;t my water floating tank separate aluminum?&#8221;<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The short answer is: No, it can&#8217;t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Water separation works purely on density:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Bottle&nbsp;caps&nbsp;(PP\/PE)<\/strong>&nbsp;are&nbsp;lighter&nbsp;than&nbsp;water,&nbsp;so&nbsp;they&nbsp;float&nbsp;to&nbsp;the&nbsp;top&nbsp;and&nbsp;get&nbsp;scooped&nbsp;away.<\/li>\n\n\n\n<li><strong>PET&nbsp;flakes<\/strong>&nbsp;are&nbsp;heavier&nbsp;than&nbsp;water,&nbsp;so&nbsp;they&nbsp;sink&nbsp;straight&nbsp;to&nbsp;the&nbsp;bottom.<\/li>\n\n\n\n<li><strong>Aluminum<\/strong>&nbsp;is&nbsp;also&nbsp;much&nbsp;heavier&nbsp;than&nbsp;water,&nbsp;so&nbsp;it&nbsp;sinks&nbsp;right&nbsp;alongside&nbsp;the&nbsp;PET&nbsp;flakes!<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">In a standard <a href=\"https:\/\/www.recycle-plant.com\/fr\/plastic-bottle-recycling-line\/\">complete PET bottle washing line<\/a>, the screw auger at the bottom of the tank scoops up the PET flakes and the aluminum together, dumping both directly into the<a href=\"https:\/\/www.recycle-plant.com\/fr\/hot-water-washing-tank.html\"> laveuse \u00e0 chaud<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When this mixed plastic enters the extruder at 280\u00b0C, the PET plastic turns into liquid melt, but the aluminum stays solid (aluminum doesn&#8217;t melt until 660\u00b0C). As the screw spins, it drags these hard metal chunks against the barrel wall like nails on a blackboard. The result? A deeply scratched barrel, leaking plastic, ruined filter screens, and an emergency shutdown of your rPET pelletizing line.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The&nbsp;Working&nbsp;Solution:&nbsp;How&nbsp;We&nbsp;Kick&nbsp;Aluminum&nbsp;Out&nbsp;Using&nbsp;&#8220;Eddy&nbsp;Currents&#8221;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Since magnets cannot pull aluminum, Shuliy Machinery uses a smart machine called an eddy current separator for plastic.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Instead of pulling metal like a magnet, this machine shoots aluminum forward like a catapult.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Here is how it works in plain language:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>The&nbsp;Fast&nbsp;Rotor:<\/strong>&nbsp;Inside&nbsp;the&nbsp;conveyor&nbsp;roller,&nbsp;there&nbsp;is&nbsp;a&nbsp;separate&nbsp;rotor&nbsp;spinning&nbsp;with&nbsp;powerful&nbsp;magnets&nbsp;at&nbsp;over&nbsp;3,000&nbsp;RPM.<\/li>\n\n\n\n<li><strong>The&nbsp;&#8220;Electric&nbsp;Jump&#8221;:<\/strong>&nbsp;When&nbsp;a&nbsp;piece&nbsp;of&nbsp;aluminum&nbsp;moves&nbsp;over&nbsp;this&nbsp;spinning&nbsp;roller,&nbsp;the&nbsp;alternating&nbsp;magnetic&nbsp;forces&nbsp;generate&nbsp;tiny&nbsp;electrical&nbsp;currents&nbsp;inside&nbsp;the&nbsp;metal.<\/li>\n\n\n\n<li><strong>The\u00a0Repulsion\u00a0Effect:<\/strong>\u00a0This\u00a0electrical\u00a0charge\u00a0turns\u00a0the\u00a0aluminum\u00a0flake\u00a0into\u00a0a\u00a0temporary\u00a0magnet\u00a0with\u00a0the\u00a0opposite\u00a0polarity.\u00a0The\u00a0two\u00a0magnets\u00a0fight\u00a0each\u00a0other,\u00a0and\u00a0the\u00a0aluminum\u00a0is\u00a0instantly\u00a0kicked\u00a0forward\u00a0over\u00a0a\u00a0splitter\u00a0wall!<\/li>\n\n\n\n<li><strong>The&nbsp;PET&nbsp;Flakes&nbsp;Drop:<\/strong>&nbsp;Because&nbsp;plastic&nbsp;is&nbsp;nonconductive,&nbsp;the&nbsp;PET&nbsp;flakes&nbsp;simply&nbsp;fall&nbsp;down&nbsp;under&nbsp;gravity&nbsp;into&nbsp;the&nbsp;clean&nbsp;bag.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Where&nbsp;Does&nbsp;It&nbsp;Fit&nbsp;in&nbsp;Your&nbsp;Factory?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Timing is everything. You cannot separate aluminum when the plastic is still wet, because water makes the flakes stick together.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Shuliy&#8217; s engineered layout places metal removal in three logical checkpoints:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Before&nbsp;the&nbsp;Crusher&nbsp;(Whole&nbsp;Bottles):<\/strong>&nbsp;A&nbsp;heavy&nbsp;overhead&nbsp;magnet&nbsp;picks&nbsp;up&nbsp;baling&nbsp;wire&nbsp;and&nbsp;steel&nbsp;scraps,&nbsp;protecting&nbsp;the&nbsp;knives&nbsp;of&nbsp;your&nbsp;heavy-duty&nbsp;<a href=\"https:\/\/www.recycle-plant.com\/fr\/pet-bottle-crushing-machine.html\">PET&nbsp;crusher<\/a>.<\/li>\n\n\n\n<li><strong>After&nbsp;the&nbsp;Dryer&nbsp;(Dry&nbsp;Flakes):<\/strong>&nbsp;Once&nbsp;the&nbsp;flakes&nbsp;pass&nbsp;through&nbsp;our&nbsp;horizontal&nbsp;dryer&nbsp;and&nbsp;hot&nbsp;air&nbsp;pipe,&nbsp;the&nbsp;dry,&nbsp;loose&nbsp;material&nbsp;passes&nbsp;over&nbsp;the&nbsp;Eddy&nbsp;Current&nbsp;Separator&nbsp;to&nbsp;bounce&nbsp;out&nbsp;aluminum&nbsp;caps,&nbsp;foil,&nbsp;and&nbsp;copper&nbsp;bits.<\/li>\n\n\n\n<li><strong>Before&nbsp;the&nbsp;Silo&nbsp;(Final&nbsp;Check):<\/strong>&nbsp;Right&nbsp;before&nbsp;packing&nbsp;or&nbsp;feeding&nbsp;the&nbsp;extruder,&nbsp;an&nbsp;ultra-sensitive&nbsp;digital&nbsp;metal&nbsp;sensor&nbsp;inspects&nbsp;the&nbsp;stream.&nbsp;If&nbsp;a&nbsp;0.5mm&nbsp;tiny&nbsp;metal&nbsp;particle&nbsp;is&nbsp;still&nbsp;hidden&nbsp;inside,&nbsp;a&nbsp;high-speed&nbsp;air&nbsp;blast&nbsp;puffs&nbsp;it&nbsp;out&nbsp;automatically.<\/li>\n<\/ol>","protected":false},"excerpt":{"rendered":"<p>There is a hidden enemy that standard magnets completely ignore: aluminum. Post-consumer bottles are covered in aluminum twist-off caps (from wine and liquor bottles), thin foil seals on juice containers, and tiny brass springs inside soap dispensers. Because aluminum and brass are non-magnetic, they slide right under the magnet and enter the cutting room. Without [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":9255,"parent":0,"template":"","tags":[],"info-type":[3],"class_list":["post-9253","info","type-info","status-publish","has-post-thumbnail","hentry","info-type-knowledge-base"],"taxonomy_info":{"info-type":[{"value":3,"label":"Knowledge Base"}]},"featured_image_src_large":["https:\/\/www.recycle-plant.com\/wp-content\/uploads\/2026\/10\/Easy-Aluminum-Separation.webp",720,540,false],"author_info":{"display_name":"Ella","author_link":"https:\/\/www.recycle-plant.com\/fr\/author\/admin\/"},"comment_info":"","_links":{"self":[{"href":"https:\/\/www.recycle-plant.com\/fr\/wp-json\/wp\/v2\/info\/9253","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.recycle-plant.com\/fr\/wp-json\/wp\/v2\/info"}],"about":[{"href":"https:\/\/www.recycle-plant.com\/fr\/wp-json\/wp\/v2\/types\/info"}],"author":[{"embeddable":true,"href":"https:\/\/www.recycle-plant.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.recycle-plant.com\/fr\/wp-json\/wp\/v2\/media\/9255"}],"wp:attachment":[{"href":"https:\/\/www.recycle-plant.com\/fr\/wp-json\/wp\/v2\/media?parent=9253"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.recycle-plant.com\/fr\/wp-json\/wp\/v2\/tags?post=9253"},{"taxonomy":"info-type","embeddable":true,"href":"https:\/\/www.recycle-plant.com\/fr\/wp-json\/wp\/v2\/info-type?post=9253"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}