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25px;"> </p> <p></p> <div id="o245010561" style="text-align: center;"></div> <p style="text-indent: 25px;"></p> <p style="text-indent: 25px;"></p> <p>    ׃受到技术的局限,E土在开发利用的q程中往往存在利用率低、冶炼成本高、环境污染大{问题。作为关键战略资源,当前低成本稀土清z生产技术已成ؓ世界性难题,是各国竞争拼抢的行业刉炏V?/p> <p>  p然资源部中国地质调查局成都矿l合利用研究所E土资源绿色高效利用创新团队首ơ提出的E土“Q团聚选”成套新技术日前在国内成功实现成果转化Qƈ应用于国外稀土矿山项目的开发。该技术通过选工艺来控制E土矿物团聚程度,最l将有用矿物提取分离Q以此来提高E土精矿的品位和回收率?/p> <p>  E土“Q团聚选”成套新技术,不仅实现了稀土矿低碳高效开发利用,q我国在稀土选矿富集分离核心技术方面保持了国际领先C?/p> <p>  破解制约E土综合开发利用瓶?/p> <p>  何ؓ“稀土”?事实上,E土是镧、铈、钕、钇{?7U金属元素的ȝ。其中,镧、铈、镨、钕被称为“轻E土”,其他元素为“中重稀土”。每U元素有着不同的用途,如镧能够应用于制备有机化工品的催化剂中以及转换农用薄膜Q铈可以用来刉喷气式推进器零Ӟ钕作为钕铁硼永磁材料Q广泛用于电子、机械等行业。同ӞE土还可以作ؓ优良的荧光、激光和电光源材料以及彩色玻璃、陶L釉料。此外,铈、钇则可作ؓ反应堆燃料的E释剂?/p> <p>  目前Q我国和世界上其他国家开采出来的E土矿石中E土氧化物的含量只有百分之几,有的甚至更低。传l的E土分LU技术存在采选回收率低、固体废物数量大、综合利用程度不高等技术难题,成ؓ制约E土资源综合开发利用的“拦路虎”?/p> <p>  Z满E土冶炼生产要求,需要不断改q稀土选矿技术方法,提高E土氧化物含量Q以得到满冉要求的稀土精ѝ然而,׃E土元素的性质极其怼Q又多以氧化物؜合物的Ş式存在于各种复杂的矿物中Q因此稀土元素的分离和提U是一Ҏ其困隄事情?/p> <p>  如何有效破解制约E土资源综合开发利用的瓉Q成都矿产综合利用研I所以满_安求ؓ目标Q重点开展了E土综合利用共性、关键性技术研IӞ通过选矿q行技术工艺的改进Q有力提高了E土精矿品的U度Q不仅能降低E土冶炼成本,qɽE土分d集效率得到成倍提升?/p> <p>  E土“Q团聚选”成套新技术面?/p> <p>  “简单来_E土‘Q团聚选技术’是以稀土捕收剂l色分子设计为基Q利用稀土与q扰矿物之间的物化差异,建立低碳短流E富集工艺的技术方法。”自然资源部高层ơ杰出青q、中国地质调查局优秀地质人才、成都矿产综合利用研I所E土创新团队学U带头h熊文良研I员告诉记者?/p> <p>  然而,团聚体控制技术是团聚磁选的核心技术之一。它是通过选工艺来控制E土矿物团聚体的团聚程度,在获得有效Q选团聚体的前提下QɽE土在选作业的回收率最大化?/p> <p>  该项技术最大的优点在于Q有效利用捕收剂选择性团聚作用,提高l粒矿物选效率,从而提高稀土精矿品位。同时加入自ȝ发的l色RFpdE土Q选药剂,大幅降低了难降解l分含量Q实现零加温选,减少了品能耗和冶炼成本?/p> <p>  成套技术在四川h大陆槽和冕宁牦牛坪稀土矿选矿工业试验表明Q应用该套技术羃短了选矿富集q程QɽE土回收率由原来的20%提高?5%以上Q精矿品位由55%提高?5%以上Qƈl合回收了铅、萤矟뀁锶钡等伴生资源。同Ӟ可降低每吨精矿碳排放?0%左右Q减了环境污染?/p> <p>  E土分LU关键核心技术国际领?/p> <p>  不同国家、不同地区、不同类型的E土资源成分差异较大,需要加大对E土共性、个性、关键性技术问题的研究Q制订解x?“对症下药”。ؓ此,成都矿l合利用研究所针对国内外不同类型的E土矿开展了技术攻兟?/p> <p>  微细_E土矿物常与其他矿物密切共生,采用传统矿方式难以单体解离Q无法得到高品质E土精ѝ研I团队提出化学解?物理分离的新思\Q攻克了国Pea ridge?E土共生矿和澳大利亚NolansE土矿{多个难选稀土矿的高效利用难题,既得C合格的稀土精矿,q实C׃生有价元素的l合利用?/p> <p>  格陵兰Kvanefjeld属于见的磷-酸盐型E土矿Q主要含E土矿物与脉石矿物的物理化学性质相近Q分选异常困难。研I团队在详细研究矿物l分及性质基础上,采用新型选捕收剂RFS强化矿物表面性质差异Q在常温条g下得到矿物纯度大?0%的稀土精矿,较国外科研机构提出的工艺程得到的精矿品位更高,作业程更简化,投资及运行成本大q降低?/p> <p>  国芒h帕斯E土矿是全球第二大E土矿山,却由于生产成本过高,?015q再度破产。研I团队先?ơʎ国矿山现场考察及调试,最l确定的选矿技术大q降低了生成本Qؓ中资企业的进入奠定了基础Q在E_提升生指标斚w提供了技术支撑?/p> <p>  在此基础上,研究团队q针对四川地区氟铈型稀土矿特点Q研发出盐酸直接出技术。稀土氯化物、氧化物、氟化物、碳酸稀土、高U金属、稀土硅化物{六大系?0余种规格。研I团队开发的pdE土品技术指标达C国际先进水^Q逐步形成以稀土新材料Z体的U技成果转化C基地?/p> <p>  目前Q凭借多q来对国内外不同cd的稀土矿资源开展的l色提取与综合利用研IӞ成都矿l合利用研究所联合盛和资源{企业,已在E土研发方面获得国家发明专?25,国、加拿大专利?;L部U技q步一{奖1V二{奖4,使我国稀土绿色清z高效利用得到大q提升,多项优势核心技术具备国际领先地位?nbsp;</p> <p><br> </p> <p style="margin: 0px; padding: 0px; box-sizing: border-box; color: rgb(51, 51, 51); font-family: K�K�, K�K�, SimSun; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; 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