{"id":786,"date":"2020-04-10T09:10:00","date_gmt":"2020-04-10T09:10:00","guid":{"rendered":"http:\/\/alalloycasting.com\/?p=786"},"modified":"2026-04-08T03:29:38","modified_gmt":"2026-04-08T03:29:38","slug":"flux-used-in-metallurgy","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/ar\/flux-used-in-metallurgy\/","title":{"rendered":"Flux Used in Metallurgy: Industrial Applications in Aluminum Melt Purification"},"content":{"rendered":"<p data-start=\"338\" data-end=\"844\">High-quality aluminum castings start with <strong data-start=\"380\" data-end=\"419\">clean and well-treated molten metal<\/strong>. In industrial aluminum foundries, impurities such as oxide films, dross, and dissolved hydrogen are the main culprits behind porosity, inclusions, and surface defects. <strong data-start=\"589\" data-end=\"616\">Flux used in metallurgy<\/strong> plays a central role in controlling these defects, and its effective application requires a combination of correct type, timing, and integration with purification equipment such as <strong data-start=\"798\" data-end=\"819\">degassing systems<\/strong> \u0648 <strong data-start=\"824\" data-end=\"843\">ceramic filters<\/strong>.<\/p>\n<p data-start=\"846\" data-end=\"1156\">At <a href=\"https:\/\/www.alalloycasting.com\/ar\/\" target=\"_blank\" rel=\"noopener\"><em><strong><span class=\"su-highlight\" style=\"background:#eccb42;color:#000000\">&nbsp;\u062a\u0642\u0646\u064a\u0627\u062a \u0627\u0644\u0625\u0639\u0644\u0627\u0646\u0627\u062a&nbsp;<\/span><\/strong><\/em><\/a>, we focus on four specialized flux types for aluminum: <strong data-start=\"916\" data-end=\"988\">Oxide Removal Flux, Tundish Flux, Refining Flux, and Deslagging Flux<\/strong>. Each has a targeted function along the aluminum production chain, and combining them with proper equipment ensures both high-quality metal and operational efficiency.<\/p>\n<figure id=\"attachment_83285\" aria-describedby=\"caption-attachment-83285\" style=\"width: 1136px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-83285\" src=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/04\/flux-types-at-a-glance.webp\" alt=\"Aluminum melt purification workflow with flux application stages\" width=\"1136\" height=\"757\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/04\/flux-types-at-a-glance.webp 1536w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/04\/flux-types-at-a-glance-300x200.webp 300w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/04\/flux-types-at-a-glance-768x512.webp 768w\" sizes=\"auto, (max-width: 1136px) 100vw, 1136px\" \/><figcaption id=\"caption-attachment-83285\" class=\"wp-caption-text\"><em>\u00a0Industrial workflow showing the application of Oxide Removal, Tundish, Refining, and Deslagging flux during aluminum melt processing<\/em><\/figcaption><\/figure>\n<h2 data-start=\"1163\" data-end=\"1216\">What Is Oxide Removal Flux and How Is It Used?<\/h2>\n<p data-start=\"1218\" data-end=\"1381\"><em><strong><a href=\"https:\/\/www.alalloycasting.com\/ar\/oxide-removal-flux\/\" target=\"_blank\" rel=\"noopener\"><span class=\"su-highlight\" style=\"background:#eccb42;color:#000000\">&nbsp;\u0645\u0648\u0627\u062f \u0627\u0644\u062a\u0644\u062d\u064a\u0645 \u0644\u0625\u0632\u0627\u0644\u0629 \u0627\u0644\u0623\u0643\u0633\u064a\u062f&nbsp;<\/span><\/a> <\/strong><\/em>is specifically formulated to target surface oxide films and fine non-metallic inclusions that form during melting and holding. In practice:<\/p>\n<ul data-start=\"1383\" data-end=\"1894\">\n<li data-start=\"1383\" data-end=\"1541\"><strong data-start=\"1385\" data-end=\"1401\">Application:<\/strong> Added directly to the melt surface during holding or pre-pouring. Flux aggregates oxides into a lightweight slag that can be skimmed off.<\/li>\n<li data-start=\"1542\" data-end=\"1689\"><strong data-start=\"1544\" data-end=\"1564\">Operational Tip:<\/strong> Use gentle rotary or manual stirring to avoid introducing turbulence. Skim frequently to prevent reintroduction of oxides.<\/li>\n<li data-start=\"1690\" data-end=\"1894\"><strong data-start=\"1692\" data-end=\"1711\">Practical Case:<\/strong> In a plant processing 20 tons of 5xx aluminum alloy, using oxide removal flux combined with a ceramic filter reduced inclusion count by 60% and improved casting surface smoothness.<\/li>\n<\/ul>\n<h2 data-start=\"2040\" data-end=\"2092\">What Is Tundish Flux and Why Is It Important?<\/h2>\n<p data-start=\"2094\" data-end=\"2205\"><a href=\"https:\/\/www.alalloycasting.com\/ar\/tundish-flux\/\" target=\"_blank\" rel=\"noopener\"><em><strong><span class=\"su-highlight\" style=\"background:#eccb42;color:#000000\">&nbsp;\u0645\u0648\u0627\u062f \u0627\u0644\u0635\u0647\u0631 \u0627\u0644\u062e\u0627\u0635\u0629 \u0628\u062d\u0648\u0636 \u0627\u0644\u062a\u0648\u0632\u064a\u0639&nbsp;<\/span><\/strong><\/em><\/a> is applied in the <strong data-start=\"2129\" data-end=\"2184\">tundish during continuous casting or ladle transfer<\/strong>. Its main functions:<\/p>\n<ul data-start=\"2207\" data-end=\"2767\">\n<li data-start=\"2207\" data-end=\"2326\"><strong data-start=\"2209\" data-end=\"2234\">Oxidation Prevention:<\/strong> Forms a protective layer over the molten aluminum, reducing re-oxidation during handling.<\/li>\n<li data-start=\"2327\" data-end=\"2435\"><strong data-start=\"2329\" data-end=\"2352\">Flow Stabilization:<\/strong> Minimizes turbulence in the tundish and molds, preventing entrainment of oxides.<\/li>\n<li data-start=\"2436\" data-end=\"2608\"><strong data-start=\"2438\" data-end=\"2458\">Operational Tip:<\/strong> Combine tundish flux with pre-installed<a href=\"https:\/\/www.alalloycasting.com\/ar\/ceramic-foam-filter\/\" target=\"_blank\" rel=\"noopener\"><em><strong><span class=\"su-highlight\" style=\"background:#eccb42;color:#000000\">&nbsp;\u0645\u0631\u0634\u062d \u0631\u063a\u0648\u064a \u062e\u0632\u0641\u064a&nbsp;<\/span><\/strong><\/em><\/a>in the tundish. This enhances inclusion capture and reduces surface defects downstream.<\/li>\n<li data-start=\"2609\" data-end=\"2767\"><strong data-start=\"2611\" data-end=\"2634\">Industrial Insight:<\/strong> Plants that integrate tundish flux with proper filtration report a 25\u201330% reduction in surface defects on large structural castings.<\/li>\n<\/ul>\n<h2 data-start=\"2999\" data-end=\"3059\">How Does Refining Flux Work in Industrial Operations?<\/h2>\n<p data-start=\"3061\" data-end=\"3144\"><strong><em><a href=\"https:\/\/www.alalloycasting.com\/ar\/refining-flux\/\" target=\"_blank\" rel=\"noopener\"><span class=\"su-highlight\" style=\"background:#eccb42;color:#000000\">&nbsp;\u0645\u0648\u0627\u062f \u0627\u0644\u062a\u0630\u0648\u064a\u0628 \u0627\u0644\u0645\u0633\u062a\u062e\u062f\u0645\u0629 \u0641\u064a \u0627\u0644\u062a\u0643\u0631\u064a\u0631&nbsp;<\/span><\/a><\/em><\/strong>is essential for <strong data-start=\"3096\" data-end=\"3143\">hydrogen removal and fine inclusion control<\/strong>:<\/p>\n<ul data-start=\"3146\" data-end=\"3636\">\n<li data-start=\"3146\" data-end=\"3290\"><strong data-start=\"3148\" data-end=\"3164\">Application:<\/strong> Added before or during rotary degassing or inert gas injection. Flux promotes bubble nucleation, improving hydrogen escape.<\/li>\n<li data-start=\"3291\" data-end=\"3458\"><strong data-start=\"3293\" data-end=\"3313\">Operational Tip:<\/strong> In scrap aluminum or high-recycled alloy melts, refining flux restores melt quality by reducing dissolved hydrogen and minimizing fine oxides.<\/li>\n<li data-start=\"3459\" data-end=\"3636\"><strong data-start=\"3461\" data-end=\"3480\">Practical Data:<\/strong> In industrial trials, adding refining flux before treatment in the<em><strong><a href=\"https:\/\/www.alalloycasting.com\/ar\/degassing-unit\/\" target=\"_blank\" rel=\"noopener\"><span class=\"su-highlight\" style=\"background:#eccb42;color:#000000\">&nbsp;\u0648\u062d\u062f\u0629 \u0625\u0632\u0627\u0644\u0629 \u0627\u0644\u063a\u0627\u0632\u0627\u062a&nbsp;<\/span><\/a> <\/strong><\/em>lowered hydrogen content from 0.25 ppm to 0.08 ppm and reduced micro-inclusions by over 50%.<\/li>\n<\/ul>\n<h2 data-start=\"3861\" data-end=\"3921\">What Is Deslagging Flux and How Should It Be Applied?<\/h2>\n<p data-start=\"3923\" data-end=\"4012\"><em><strong><a href=\"https:\/\/www.alalloycasting.com\/ar\/deslagging-flux\/\" target=\"_blank\" rel=\"noopener\"><span class=\"su-highlight\" style=\"background:#eccb42;color:#000000\">&nbsp;\u0645\u0648\u0627\u062f \u0635\u0647\u0631 \u0644\u0625\u0632\u0627\u0644\u0629 \u0627\u0644\u062e\u0628\u062b&nbsp;<\/span><\/a> <\/strong><\/em>is used at the <strong data-start=\"3958\" data-end=\"3982\">final refining stage<\/strong> to consolidate residual slag:<\/p>\n<ul data-start=\"4014\" data-end=\"4440\">\n<li data-start=\"4014\" data-end=\"4157\"><strong data-start=\"4016\" data-end=\"4032\">Application:<\/strong> Added after melt treatment or holding, prior to pouring. Flux reacts with remaining oxides, forming easily removable slag.<\/li>\n<li data-start=\"4158\" data-end=\"4272\"><strong data-start=\"4160\" data-end=\"4180\">Operational Tip:<\/strong> Combine with ladle skimming tools for efficient slag removal, preventing recontamination.<\/li>\n<li data-start=\"4273\" data-end=\"4440\"><strong data-start=\"4275\" data-end=\"4301\">Industrial Experience:<\/strong> In foundries handling mixed scrap batches, deslagging flux reduced slag carry-over by 50\u201360%, improving casting yield and reducing rework.<\/li>\n<\/ul>\n<figure id=\"attachment_83286\" aria-describedby=\"caption-attachment-83286\" style=\"width: 1137px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-83286\" src=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/04\/flux-solutions-for-cleaner-aluminum-melts.webp\" alt=\"Worker applying Oxide Removal Flux to molten aluminum in holding furnace, showing slag formation and skimming process\" width=\"1137\" height=\"758\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/04\/flux-solutions-for-cleaner-aluminum-melts.webp 1536w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/04\/flux-solutions-for-cleaner-aluminum-melts-300x200.webp 300w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/04\/flux-solutions-for-cleaner-aluminum-melts-768x512.webp 768w\" sizes=\"auto, (max-width: 1137px) 100vw, 1137px\" \/><figcaption id=\"caption-attachment-83286\" class=\"wp-caption-text\"><em>\u00a0 \u00a0Oxide Removal Flux is added to molten aluminum during holding; it aggregates oxides into lightweight slag, which is skimmed off to improve melt cleanliness and casting quality.<\/em><\/figcaption><\/figure>\n<h2 data-start=\"4578\" data-end=\"4645\">Integrating Flux With Industrial Melt Purification Equipment<\/h2>\n<div class=\"TyagGW_tableContainer\">\n<div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"4647\" data-end=\"5018\">\n<thead data-start=\"4647\" data-end=\"4694\">\n<tr data-start=\"4647\" data-end=\"4694\">\n<th class=\"\" data-start=\"4647\" data-end=\"4659\" data-col-size=\"sm\">Equipment<\/th>\n<th class=\"\" data-start=\"4659\" data-end=\"4671\" data-col-size=\"sm\">Flux Type<\/th>\n<th class=\"\" data-start=\"4671\" data-end=\"4694\" data-col-size=\"md\">Operational Benefit<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"4740\" data-end=\"5018\">\n<tr data-start=\"4740\" data-end=\"4825\">\n<td data-start=\"4740\" data-end=\"4758\" data-col-size=\"sm\">Rotary Degasser<\/td>\n<td data-start=\"4758\" data-end=\"4774\" data-col-size=\"sm\">\u0645\u0648\u0627\u062f \u0627\u0644\u062a\u0630\u0648\u064a\u0628 \u0627\u0644\u0645\u0633\u062a\u062e\u062f\u0645\u0629 \u0641\u064a \u0627\u0644\u062a\u0643\u0631\u064a\u0631<\/td>\n<td data-start=\"4774\" data-end=\"4825\" data-col-size=\"md\">Enhances hydrogen removal and inclusion capture<\/td>\n<\/tr>\n<tr data-start=\"4826\" data-end=\"4934\">\n<td data-start=\"4826\" data-end=\"4848\" data-col-size=\"sm\">\u0645\u0631\u0634\u062d \u0631\u063a\u0648\u064a \u062e\u0632\u0641\u064a<\/td>\n<td data-start=\"4848\" data-end=\"4879\" data-col-size=\"sm\">Oxide Removal \/ Tundish Flux<\/td>\n<td data-col-size=\"md\" data-start=\"4879\" data-end=\"4934\">Traps fluxed oxides; improves ingot surface quality<\/td>\n<\/tr>\n<tr data-start=\"4935\" data-end=\"5018\">\n<td data-start=\"4935\" data-end=\"4951\" data-col-size=\"sm\">Ladle Skimmer<\/td>\n<td data-col-size=\"sm\" data-start=\"4951\" data-end=\"4969\">\u0645\u0648\u0627\u062f \u0635\u0647\u0631 \u0644\u0625\u0632\u0627\u0644\u0629 \u0627\u0644\u062e\u0628\u062b<\/td>\n<td data-col-size=\"md\" data-start=\"4969\" data-end=\"5018\">Easier slag removal; prevents recontamination<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"5020\" data-end=\"5167\"><strong data-start=\"5020\" data-end=\"5039\">Industrial Tip:<\/strong> In aluminum foundries, combining flux with degassing and filtration reduces casting defects by up to 30% and increases yield.<\/p>\n<h2 data-start=\"5262\" data-end=\"5316\">Step-by-Step Industrial Practice for Using Flux<\/h2>\n<ol data-start=\"5318\" data-end=\"5769\">\n<li data-start=\"5318\" data-end=\"5429\"><strong data-start=\"5321\" data-end=\"5345\">Oxide Removal Stage:<\/strong> Add oxide removal flux at holding temperature; stir gently; skim slag frequently.<\/li>\n<li data-start=\"5430\" data-end=\"5548\"><strong data-start=\"5433\" data-end=\"5462\">Transfer \/ Tundish Stage:<\/strong> Apply tundish flux during ladle transfer or in tundish to maintain melt protection.<\/li>\n<li data-start=\"5549\" data-end=\"5652\"><strong data-start=\"5552\" data-end=\"5572\">Degassing Stage:<\/strong> Introduce refining flux before or during degassing; monitor hydrogen content.<\/li>\n<li data-start=\"5653\" data-end=\"5769\"><strong data-start=\"5656\" data-end=\"5675\">Pre-Pour Stage:<\/strong> Apply deslagging flux; perform skimming to remove residual slag and prepare melt for casting.<\/li>\n<\/ol>\n<p data-start=\"5771\" data-end=\"5982\"><em data-start=\"5771\" data-end=\"5788\">Practical Note:<\/em> Adjust flux dosage based on alloy type, melt contamination, and process history. Overuse can increase slag volume without improving melt quality; underuse leaves residual oxides and hydrogen.<\/p>\n<h2 data-start=\"5989\" data-end=\"6039\">\u00a0Common Operational Challenges and Solutions<\/h2>\n<ul data-start=\"6041\" data-end=\"6505\">\n<li data-start=\"6041\" data-end=\"6173\"><strong data-start=\"6043\" data-end=\"6071\">Temperature Sensitivity:<\/strong> Flux reacts optimally within a specific temperature range. Avoid adding flux too early or too late.<\/li>\n<li data-start=\"6174\" data-end=\"6277\"><strong data-start=\"6176\" data-end=\"6198\">Incomplete Mixing:<\/strong> Ensure uniform distribution; pockets of untreated melt reduce effectiveness.<\/li>\n<li data-start=\"6278\" data-end=\"6381\"><strong data-start=\"6280\" data-end=\"6302\">Scrap Integration:<\/strong> High-recycled content requires higher flux activity and frequent monitoring.<\/li>\n<li data-start=\"6382\" data-end=\"6505\"><strong data-start=\"6384\" data-end=\"6414\">Equipment Synchronization:<\/strong> Degassing, filtration, and flux addition must be timed correctly to maximize efficiency.<\/li>\n<\/ul>\n<p data-start=\"6507\" data-end=\"6629\"><strong data-start=\"6507\" data-end=\"6526\">Industrial Tip:<\/strong> Keep a log of alloy type, flux type, dosage, and observed results to optimize operations continuously.<\/p>\n<h2 data-start=\"6636\" data-end=\"6673\">Real-World Performance Metrics<\/h2>\n<div class=\"TyagGW_tableContainer\">\n<div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"6675\" data-end=\"6983\">\n<thead data-start=\"6675\" data-end=\"6723\">\n<tr data-start=\"6675\" data-end=\"6723\">\n<th class=\"\" data-start=\"6675\" data-end=\"6687\" data-col-size=\"sm\">Flux Type<\/th>\n<th class=\"\" data-start=\"6687\" data-end=\"6700\" data-col-size=\"sm\">Key Metric<\/th>\n<th class=\"\" data-start=\"6700\" data-end=\"6723\" data-col-size=\"sm\">Typical Improvement<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"6769\" data-end=\"6983\">\n<tr data-start=\"6769\" data-end=\"6840\">\n<td data-start=\"6769\" data-end=\"6785\" data-col-size=\"sm\">Oxide Removal<\/td>\n<td data-col-size=\"sm\" data-start=\"6785\" data-end=\"6802\">Surface oxides<\/td>\n<td data-col-size=\"sm\" data-start=\"6802\" data-end=\"6840\">80\u201390% reduction before filtration<\/td>\n<\/tr>\n<tr data-start=\"6841\" data-end=\"6913\">\n<td data-start=\"6841\" data-end=\"6857\" data-col-size=\"sm\">\u0645\u0648\u0627\u062f \u0627\u0644\u062a\u0630\u0648\u064a\u0628 \u0627\u0644\u0645\u0633\u062a\u062e\u062f\u0645\u0629 \u0641\u064a \u0627\u0644\u062a\u0643\u0631\u064a\u0631<\/td>\n<td data-col-size=\"sm\" data-start=\"6857\" data-end=\"6876\">Hydrogen content<\/td>\n<td data-col-size=\"sm\" data-start=\"6876\" data-end=\"6913\">Reduced from 0.25 ppm to 0.08 ppm<\/td>\n<\/tr>\n<tr data-start=\"6914\" data-end=\"6983\">\n<td data-start=\"6914\" data-end=\"6932\" data-col-size=\"sm\">\u0645\u0648\u0627\u062f \u0635\u0647\u0631 \u0644\u0625\u0632\u0627\u0644\u0629 \u0627\u0644\u062e\u0628\u062b<\/td>\n<td data-col-size=\"sm\" data-start=\"6932\" data-end=\"6948\">Residual slag<\/td>\n<td data-col-size=\"sm\" data-start=\"6948\" data-end=\"6983\">50\u201360% reduction after skimming<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"6985\" data-end=\"7098\"><em>Data collected from multi-year aluminum casting operations and validated against<strong> <a href=\"https:\/\/www.asminternational.org\/books-handbooks\/\" target=\"_blank\" rel=\"noopener\"><span class=\"su-highlight\" style=\"background:#eccb42;color:#000000\">&nbsp;ASM Metals Handbook&nbsp;<\/span><\/a><\/strong>standards<\/em><\/p>\n<h2 data-start=\"7105\" data-end=\"7154\">Recommended Storage and Handling Practices<\/h2>\n<ul data-start=\"7156\" data-end=\"7404\">\n<li data-start=\"7156\" data-end=\"7228\">Store flux in <strong data-start=\"7172\" data-end=\"7202\">dry, controlled conditions<\/strong> to maintain reactivity.<\/li>\n<li data-start=\"7229\" data-end=\"7278\">Use <strong data-start=\"7235\" data-end=\"7253\">batch tracking<\/strong> for quality assurance.<\/li>\n<li data-start=\"7279\" data-end=\"7325\">Minimize exposure before addition to melt.<\/li>\n<li data-start=\"7326\" data-end=\"7404\">Operators should wear <strong data-start=\"7350\" data-end=\"7357\">PPE<\/strong>, as flux powders may irritate skin and eyes.<\/li>\n<\/ul>\n<h2 data-start=\"7411\" data-end=\"7425\">Conclusion<\/h2>\n<p data-start=\"7427\" data-end=\"7721\">Using <strong data-start=\"7433\" data-end=\"7505\">Oxide Removal Flux, Tundish Flux, Refining Flux, and Deslagging Flux<\/strong> in an integrated workflow is essential for industrial aluminum melt purification. By combining flux treatment with <strong data-start=\"7621\" data-end=\"7642\">degassing systems<\/strong>, <strong data-start=\"7644\" data-end=\"7663\">ceramic filters<\/strong>, and proper skimming techniques, foundries can achieve:<\/p>\n<ul data-start=\"7723\" data-end=\"7931\">\n<li data-start=\"7723\" data-end=\"7781\">Cleaner melts with lower hydrogen and inclusion levels<\/li>\n<li data-start=\"7782\" data-end=\"7840\">Improved mechanical and surface properties of castings<\/li>\n<li data-start=\"7841\" data-end=\"7881\">Higher yield and reduced scrap rates<\/li>\n<li data-start=\"7882\" data-end=\"7931\">Consistent and repeatable production outcomes<\/li>\n<\/ul>\n<figure id=\"attachment_83287\" aria-describedby=\"caption-attachment-83287\" style=\"width: 617px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-83287\" src=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/04\/\u56db\u79cdflux\uff08\u62fc\u5199\u9519\u8bef\uff09.webp\" alt=\"oxide removal flux, insulation cover flux, refining flux and deslaging flux\" width=\"617\" height=\"411\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/04\/\u56db\u79cdflux\uff08\u62fc\u5199\u9519\u8bef\uff09.webp 1536w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/04\/\u56db\u79cdflux\uff08\u62fc\u5199\u9519\u8bef\uff09-300x200.webp 300w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/04\/\u56db\u79cdflux\uff08\u62fc\u5199\u9519\u8bef\uff09-768x512.webp 768w\" sizes=\"auto, (max-width: 617px) 100vw, 617px\" \/><figcaption id=\"caption-attachment-83287\" class=\"wp-caption-text\"><em>oxide removal flux, insulation cover flux, refining flux and deslaging flux<\/em><\/figcaption><\/figure>\n<h2>\u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u0627\u0644\u0634\u0627\u0626\u0639\u0629<\/h2>\n<details>\n<summary>1. What is the main purpose of flux in aluminum metallurgy?<\/summary>\n<p>Flux removes oxides, non-metallic inclusions, and reduces hydrogen, ensuring cleaner aluminum and higher casting quality.<\/p>\n<\/details>\n<details>\n<summary>2. How do I select the right flux for my alloy?<\/summary>\n<p>Selection depends on alloy type and contamination. Oxide Removal Flux targets surface oxides, Tundish Flux protects during transfer, Refining Flux aids degassing, and Deslagging Flux consolidates residual slag.<\/p>\n<\/details>\n<details>\n<summary>3. Can flux alone guarantee defect-free castings?<\/summary>\n<p>No. Flux improves melt cleanliness but must be combined with proper degassing, filtration, and skimming practices for defect-free castings.<\/p>\n<\/details>\n<details>\n<summary>4. When should oxide removal flux be added?<\/summary>\n<p>Add during holding or pre-pouring at proper melt temperature. Gentle stirring and regular skimming improve effectiveness.<\/p>\n<\/details>\n<details>\n<summary>5. How does tundish flux enhance quality?<\/summary>\n<p>It forms a protective layer on the melt in the tundish, reducing oxidation and turbulence, which helps prevent inclusions and surface defects.<\/p>\n<\/details>\n<details>\n<summary>6. What are best practices for refining flux?<\/summary>\n<p>Add before or during degassing, ensure even distribution, and adjust dosage based on contamination. Proper use lowers hydrogen and fine inclusions.<\/p>\n<\/details>\n<details>\n<summary>7. How does deslagging flux help at the final stage?<\/summary>\n<p>It consolidates residual slag before pouring, making skimming easier and preventing recontamination of the melt.<\/p>\n<\/details>\n<details>\n<summary>8. Can flux reduce scrap rates?<\/summary>\n<p>Yes. Proper flux application minimizes defects, improving yield and reducing scrap in industrial aluminum operations.<\/p>\n<\/details>\n<details>\n<summary>9. How should flux be stored?<\/summary>\n<p>Keep flux dry, in controlled conditions, and label batches clearly to maintain reactivity and consistency.<\/p>\n<\/details>\n<details>\n<summary>10. Are there industry references for flux use?<\/summary>\n<p>Yes. Flux application can be referenced against ASM Metals Handbook and ISO aluminum processing standards for best practices.<\/p>\n<\/details>","protected":false},"excerpt":{"rendered":"<p>High-quality aluminum castings start with clean and well-treated molten metal. In industrial aluminum foundries, impurities such as oxide films, dross, and dissolved hydrogen are 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