Aluminium Recycling Technology: Process, Equipment & Regulation
Independent Technical Research Institute for Aluminium Recycling Technology
铝回收与再生铝技术研究：工艺路线 · 车间装备 · 法规与贸易
We document what happens between the melting furnace and the landfill — dross formation, metal recovery, salt slag treatment, and the residue that remains. Every article is built on reaction mechanisms, measurable equipment parameters, primary patent texts and verifiable trade data.
我们记录从熔炼炉到填埋场之间发生的一切——铝渣的生成、金属的回收、盐渣的处理，以及最终剩余的残渣。每篇文章都建立在反应机理、可测量的装备参数、原始专利文本与可核查的贸易数据之上。
Latest Published
Technologies & Processes · Topic D
Thermal Efficiency in Recycling: Oxy-Fuel Combustion in Tilting Rotary Furnaces (TRF)
TRF remains the standard vessel for black dross and salt cake. This item examines what oxy-fuel combustion changes — flue gas volume, thermal efficiency, cycle time — and where the claims can and cannot be traced to a primary source.
倾动式回转炉（TRF）的富氧燃烧技术 · 已发布 2026-10-29
What We Cover
Process Documentation
Dross formation mechanisms, thermal recovery, salt-free melting, and residue valorisation routes — with reaction equations stated explicitly.
工艺文献：铝渣生成机理、热态回收、无盐熔炼与残余物资源化路线。
Equipment Evaluation
Dross presses, coolers, pans, sow moulds, degassing and filtration units — analysed on measurable parameters, not brand claims.
装备评估：压榨机、冷渣机、渣锅、锭模、除气与过滤装置。
Regulatory Mapping
How one material stream is classified differently across jurisdictions — hazardous waste catalogues, cross-border transfer rules, carbon accounting.
法规映射：同一物料流在不同法域的分类差异与碳核算。
Patent & Historical Tracing
Landmark patent families and engineering history, cited by publication number, applicant and filing date.
专利溯源：里程碑专利族与工程史，按公开号逐条引用。
Browse by Section
|
Hot dross recovery · cold dross & residue · hazardous waste valorisation |
Pressing & cooling · pans & moulds · melt refining & filtration |
Regional benchmarks · decarbonisation & CBAM · markets & resources |
|
Landmark patents · industry pioneers · patent database |
HS codes & customs data · academic and media index |
Also: About the Institute（关于本机构）· Editorial Standards（文献引用标准）· Full Sitemap（站点地图）
Key Figures
A small set of constants recurs across this site. They are quoted here with their basis, because these numbers are frequently cited without one.
| Figure | Value | Basis |
|---|---|---|
| Dross generation rate | 1–8% of melt volume | Industry source range; varies by furnace and practice |
| Metallic aluminium in dross | 30–70 wt% | Reported range; up to 80% in some primary skims |
| Heat of oxidation of aluminium | 8.7 kWh/kg metal | Patent literature — why uncontrolled hot dross self-heats |
| Oxidation loss rate in hot dross | ≈1% per minute | Manufacturer technical literature |
| In-house drain / secondary recovery | 5–25% / 40–70% | Two distinct metrics — never interchangeable |
| Primary vs secondary aluminium | ≈16 vs ≈0.5 t CO2e / t | IAI / IEA cited figures; secondary ≈5% of primary energy |
Each figure links to the page where its source and scope are stated in full. Recovery percentages quoted without a stated basis — relative to metallic aluminium input, total dross mass, or a named installation — are treated as unverified on this site.
Classification Anchors
We use one fixed set of classification codes across the entire site, so that figures quoted in different articles remain comparable. These are maintained on a permanent reference page.
Customs & Trade (HS)
| HS Code | Commodity | 中文品名 |
|---|---|---|
| 2606.00 | Bauxite, ores and concentrates | 铝矿砂及其精矿 |
| 7601.10 / 7601.20 | Unwrought aluminium — non-alloy / alloy (CBAM-covered) | 未锻轧铝 |
| 7602.00 | Aluminium scrap | 铝废碎料 |
| 2620.40 | Slag, ash & residues containing mainly aluminium (incl. skimmings, aluminium ash) | 主要含铝的矿渣、矿灰及残渣（含扒渣、铝灰） |
Hazardous Waste (China, HW48)
| Code | Waste | Hazard |
|---|---|---|
| 321-024-48 | Primary aluminium dross, salt slag & secondary dross from recovery | R, T |
| 321-026-48 | Secondary aluminium & fabrication dross, salt slag & secondary dross | R |
| 321-034-48 | Dust from flue-gas treatment of dross recovery & remelting | T, R |
R = Reactivity（反应性）, T = Toxicity（毒性）. Source: 《国家危险废物名录（2025年版）》. Full reference: Resources & Data.
Independence
AluminiumRecycling operates under three enforceable boundaries: no equipment sales agency, no paid promotional rankings, and no funding that conditions our conclusions. Independence here is defined by auditable operational limits rather than by statements of neutrality. Errors are corrected openly, with revisions recorded on the page.
本机构恪守三项可核查的行为边界：不做设备销售代理、不承接商业推广排名、不接受影响结论的资助。独立性建立在可审计的运行边界之上，而非立场宣示；错误公开更正并记录修订日期。
Read the full statement: About the Institute · Editorial Standards
Publication Roadmap — 13 Items
The reference series comprises thirteen items: nine core articles plus four technical topics. Status is updated as each item is published.
| Section | Items | Status |
|---|---|---|
| Technologies & Processes | Mainstream dross technologies compared Aluminium dross residue (HW48) valorisation TRF & oxy-fuel combustion |
1 published 2 planned |
| Casthouse Equipment | Dross presses, pans & sow moulds Melt degassing & CFF filtration |
Planned |
| Insights & Trends | Bauxite distribution & global trade Primary vs secondary aluminium Hydro power & green aluminium Regional policy differences Top 10 smelters benchmark Recycler business models Carbon footprint & CBAM |
Planned |
| Patents & Pioneers | Pioneers & Alcan dross cooler patents | Planned |
中文摘要 · 本站是什么
AluminiumRecycling 是一家独立再生铝技术专业研究机构，记录从熔炼炉到填埋场之间发生的一切：铝渣如何生成、金属如何回收、盐渣如何处理、残渣最终去向何处。
内容覆盖五个板块：技术与工艺（热渣回收、冷渣处理、危废资源化，3 篇）、车间装备（压榨机、渣锅锭模、除气过滤，2 篇）、前沿洞察（区域政策、TOP10 对标、碳足迹与 CBAM，7 篇）、专利与先驱人物（1 篇），以及资源与数据中心参考页。全站共 13 篇参考长文（9 篇主文 + 4 个技术专题）。
核心数据锚点：铝渣生成量占熔体体积 1–8%；渣中金属铝含量 30–70%（质量分数），原铝扒渣可达 80%；铝的氧化热 8.7 kWh/kg 金属——这正是热渣在空气中不会自行冷却的原因；热渣氧化损失约每分钟 1%；厂内沥铝率 5–25% 与二次回收率 40–70% 是两个不可混用的指标；原铝与再生铝碳强度约 16 与 0.5 吨 CO₂e/吨，再生能耗约为原铝的 5%。
所有内容建立在反应机理、可测量的装备参数、原始专利文本与可核查的贸易数据之上。全站统一使用一套归类编码：海关 HS 2606.00 / 7601.10-20 / 7602.00 / 2620.40（铝灰渣），以及中国危废 HW48 下的 321-024-48、321-026-48、321-034-48。
本机构恪守三项可核查的行为边界：不做设备销售代理、不承接商业推广排名、不接受影响结论的资助。独立性建立在可审计的运行边界之上，而非立场宣示；发现错误公开更正并记录修订日期。