基础金属	铜电解铜铜精矿铜管铜棒废铜铜排铜合金精铜杆再生铜杆铜板带铝铝土矿氧化铝电解铝铝辅料铝棒铝合金锭废铝铝杆铝型材铝板卷铅铅精矿铅锭铅蓄电池再生精铅还原铅废铅蓄电池铅合金锌锌精矿电解锌锌合金氧化锌锌粉锡锡精矿锡锭锡材
稀有金属	稀土稀土矿稀土氧化物稀土金属钕铁硼稀散金属锑铋铟锗镓硒钽锆贵金属白银钨钨精矿钨粉碳化钨钨酸钠钨条钨铁钨材钼钼精矿工业氧化钼钼铁钼化工高纯三氧化钼钼金属钛钛精矿钛渣四氯化钛海绵钛钛金属钛白粉
新能源	锂锂矿锂化合物金属锂镍镍矿镍铁精炼镍镍盐高冰镍 MHP 钴电解钴钴粉氯化钴四氧化三钴硫酸钴钴中间品氧化钴碳酸钴钴酸锂锰锰矿电解锰电池级硫酸锰锂电正负极三元前驱体磷酸铁正极材料石油焦针状焦包覆沥青人造石墨硅碳负极硅氧负极电解液隔膜隔膜电解液电芯

华联锌铟攻克微细粒锡石回收技术瓶颈联合工艺提升回收率至92%

2025-02-18 16:25:20 来源：北方有色网责任编辑：韩泽楷

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国家知识产权局最新公开信息显示，云南华联锌铟股份有限公司（以下简称“华联锌铟”）申报的“一种铁硫粗精矿中锡石的回收方法”获发明专利授权（公开号CN119056572A）。该技术通过创新性的“分级-重选-浮选-再磨”四维协同工艺，实现铁硫尾矿中锡石的高效回收，有望将锡资源综合利用率提升20个百分点，为全球锡产业绿色升级提供中国方案。

技术突破：破解微细粒锡石回收世界难题

传统锡石回收工艺对-19μm微细粒级锡石回收率不足50%，且易造成金属泥化流失。华联锌铟的专利技术通过三大创新实现突破：

旋流分级精准调控：采用φ24m大型浓密机处理旋流器溢流，将-10μm细粒级锡石截留率从62%提升至89%；
重浮联合增效：细砂摇床+刻槽摇床组合精选，配合新型捕收剂浮选，使20-74μm粒级锡石回收率提高至92%；
智能再磨闭环：对未解离锡石实施磨矿粒度在线监测（D80≤15μm），循环再选降低流失率，尾矿含锡量从0.25%降至0.08%。

产业价值：年增锡精矿3000吨增效超6亿元

据测算，该技术应用于华联锌铟2000万吨/年选矿系统后：

资源挖潜：可从铁硫尾矿中多回收锡金属量3000吨/年（相当于中型锡矿储量），按当前锡价22万元/吨测算，年增产值6.6亿元；
降本减排：选矿电耗降低18%（吨矿节电4.2kW·h），废水回用率提升至95%，减少尾矿库堆存压力30%；
战略储备：全球锡资源静态储采比仅15年，该技术可延长矿山服务年限5-8年。

技术辐射：重构全球锡产业链格局

装备升级：配套研发的φ24m深锥浓密机、模块化摇床组已实现国产化，成本较进口设备降低40%；
标准输出：技术方案覆盖锡石粒度0.01-2mm全区间，可复制至缅甸、刚果（金）等海外锡矿；
循环经济：与宁德时代合作开发含锡电子废料再生系统，电池级硫酸亚锡回收纯度达99.99%。

专家解读
中国工程院院士孙传尧指出：“该专利标志着我国在复杂共伴生矿综合利用领域达到国际领先水平。若在全国15家大型锡矿山推广，每年可多回收锡金属5万吨，相当于2023年全球锡产量的18%。”

企业动向
华联锌铟计划投资3.8亿元建设智能化选矿示范线，2025年实现专利技术工业化应用，并联合中南大学攻关锡石量子点提取技术，开拓光伏钙钛矿电池新赛道。

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华联锌铟攻克微细粒锡石回收技术瓶颈 联合工艺提升回收率至92%

技术突破：破解微细粒锡石回收世界难题

产业价值：年增锡精矿3000吨 增效超6亿元

技术辐射：重构全球锡产业链格局

华联锌铟攻克微细粒锡石回收技术瓶颈联合工艺提升回收率至92%

产业价值：年增锡精矿3000吨增效超6亿元