盐湖资源开发污染问题的探讨及对策

青海有丰富的盐湖资源,盐湖钾肥生产带来的副产品对盐湖资源与环境污染严重。本文阐述了水氯镁石、废弃的石盐,以及石灰法生产镁砂工艺、利用水氯镁石电解生产镁工艺等对环境的污染与危害。指出盐湖资源综合开发的关键是如何利用生产钾肥后的水氯镁石,而脱水问题又是利用水氯镁石的关键。文章重点介绍了几种防治污染的绿色生产工艺:合成铵光卤石脱水炼镁法、水氯镁石溶剂络合脱水电解制镁法、氨法制取氧化镁—直接电解氧化镁生产金属镁新工艺等,尤其是后者,属具有节能降耗、高效、清洁等特点的新技术,是当前综合利用水氯镁石的最好方法。     

我国盐湖镁资源综合开发利用向产业化生产迈进

自2006年以来,国内从事盐湖镁资源研发生产的高新科技企业利用柴达木盆地丰富的盐湖镁资源,在成功突破盐湖水氯镁石提镁技术的基础上,已形成5000t高纯氢氧化镁等系列镁产品的年产规模。     

宏观大尺寸锂离子筛的制备与吸附应用研究进展

锂是重要的战略资源，近年来随着新能源产业的快速发展，带动了金属锂及其化合物需求量的快速增长。我国已探明锂资源大多分布在盐湖卤水中，但其较高的镁锂比制约了大规模的开发利用。在众多的提锂方法中，锂离子筛吸附技术由于工艺简单、选择性高和可循环使用而被广泛研究，但人工制备的锂离子筛多为粉末状，难以回收和重复使用，不利于推广应用。通过造粒、铸膜等成型技术将锂离子筛构筑为宏观大尺寸吸附剂，能够有效弥补其在实际应用中的不足，对于加快推进盐湖卤水锂资源开发、实现我国锂资源自给自足具有重要意义。综述了锂离子筛的主要种类和发展现状、宏观大尺寸锂离子筛的常用制备方法以及宏观大尺寸锂离子筛在吸附提锂中的应用进展，最后对该技术进行了总结和展望。     

沉淀法分离高镁锂比盐湖卤水的研究现状

锂及其化合物因具有许多重要的特性而被广泛应用,尤其在新能源(锂电池)领域占有无法替代的地位。中国盐湖锂资源极为丰富,且多为高镁锂比的盐湖卤水,但锂资源的开发利用尚存在技术障碍。为此,结合笔者的研究成果,本文对沉淀法分离提取高镁锂比盐湖卤水的研究现状以及各方法的优缺点进行了归纳总结。     

基于钻石模型的青海柴达木盐湖化工产业发展竞争力研究

青海柴达木地区盐湖资源丰富,实现绿色开发潜力巨大。本文运用钻石模型,在资源承载力与环境容量的约束条件内,对青海柴达木盐湖化工产业发展竞争力的生产要素、需求条件、相关产业及支持产业的发展情况、企业战略与结构和同业对手的竞争四项关键要素和政府、机遇两项辅助影响因素进行分析,并提出以加快柴达木盐湖资源综合利用开发水平,发展青海柴达木盐湖的持续、合理、有序的循环经济道路,提高青海柴达木盐湖化工产业绿色开发的意见与建议。     

白银扎布耶锂业有限公司

白银扎布耶镪项目．是国家计委2001年9月批复通过的”西藏扎布耶锂资源开发产业化示范工程项目”的键盐加工部分．被列入国家高科技产业发展项目计划．也是西藏、甘肃两地实施西部大开发战略的一个重大项目。此项目是目前我国盐湖卤水提锂生产规模最大的工程项目．该项目的建成填补了国内盐湖提锂技术的空白．标志着我国锂工业发展迈入新的里程碑。     

平远:研讨稀土发展前景 打造稀土名片

2011年年底,广东省平远县举行稀土产业发展研讨会,中国工程院院士张国成等专家围绕"我国稀土资源和工业发展现状"、"稀土新材料在战略新兴产业中的应用"、"稀土绿色治金工艺进展"、"平远发展稀土产业的建议"等做了专题报告。中国稀土学会秘书长林东鲁出席会议并讲话。     

青海锂业破解世界性技术难题:从高镁锂比盐湖卤水中成功提取锂

正青海锂业副总经理周晓军介绍,青海锂业拥有的离子选择迁移合成碳酸锂技术,突破性地解决了高镁锂比盐湖提取锂盐这一世界性难题,成功利用台吉乃尔盐湖资源生产出高品质碳酸锂产品。该技术系统地探索了低成本从高镁锂比硫酸镁亚型盐湖卤水中提取锂的技术难题,构建了高镁锂比盐湖卤水离子选择性     

察尔汗盐湖资源开发的生态环境保护对策

察尔汗盐湖是我国重要的多组分盐矿之一,但其属于干旱荒漠大陆性高原气候区,生态环境相对脆弱。基于我国以往对于盐湖资源的开发模式和开发利用实践,分析了资源开发存在的生态风险因素,认为水体变化严重影响区域生态环境,因此,维持盐湖水量相对均衡是实现资源可持续开发和生态环境保护的基本需求。本文从产业发展、绿色节能、固液转化、科学蓄水、环境监测等方面,提出构建多产业集群的综合经济发展模式、全周期无污染闭环绿色生产、充分使用自然能源、固体钾转化为液体钾开采等具体对策,以实现盐湖产业与生态环境保护的融合发展。     

青海盐湖水氯镁石利用技术现状

我国青海盐湖资源丰富,但由于开发初期只注重提取氯化钾,副产的废卤水外排经日晒蒸发形成大量水氯镁石,镁资源浪费的同时对盐湖生态环境造成严重破坏,因此水氯镁石资源的综合利用问题亟待解决。文章介绍了利用盐湖水氯镁石制备金属镁、氧化镁和氢氧化镁的工艺技术现状及其存在的问题,并对盐湖水氯镁石利用技术的发展趋势进行分析与展望。      

Technological development

<正>Premiere of cutting-edge cooling appliance using rare earth magnetic refrigeration technology Magnetic refrigeration technology has attracted the attention of the world for its advantages of high efficiency,energy conservation and environmental protection.As the breakthrough made in magnetic refrigeration materials at room temperature and magnetic refrigerator in recent years,more and more countries have joined in the RD of     

Technology development

<正>High quality natural meteoritic magnet successfully produced in a short time Source:website of Tohoku University Researchers from Tohoku University in Japan have succeeded in producing a completely rare-earth free high-quality FeNi magnet.The team,led by Professor Akihiro Makino as principal investigator is supported by a MEXT(Ministry of Education,Culture,Sports,Science and Technology,Japan)project entitled,"Ultra-low     

Scientific development

<正>Top 10 potential advanced materials in the future Source:Advanced Materials on Line Material industry is the basic industry for national economy.Advanced material leads the development of material industry.It is an important strategic new emerging industry.Advanced Materials on Line held the First Capital and Technology Forum of Advanced Materials in Shenzhen on 12 December 2014,where the top 10potential advanced materials in the future were selected,aiming to promote the development and popularization of advanced materials in China.Rare earths have close relations with advanced material industry.They are widely applied in advanced materials for their excellent optical,electric and magnetic properties.     

Technological development

正DOE grant aimed at improving process to reduce nuclear fuel waste An$800,000 grant from the U.S. Department of Energy will allow Penn State researchers to investigate a new approach for removing rare-earth fission products from the molten salt baths where used nuclear fuel is electro-refined to recycle uranium and minimize nuclear waste.     

Technological development

正Rare-earth magnets from hard drives are re-used in motors US researchers have succeeded in recovering rare-earth magnets from old computer hard drives and re-using them, without alteration, in motors. A second group of researchers has developed an acid-free technique for recycling rare-earth magnets and recovering more than 99%pure rare-earth elements.The demonstrations are part of a national US effort to find ways of recycling the powerful rare-earth     

Technology development

正Extracting rare-earth elements from coal could soon be economical in U.S.Extracted from the report of UNIVERSITY PARK,Pa.The U.S.could soon decrease its dependence on importing valuable rare-earth elements,according to a team of Penn State and U.S.Department of Energy researchers who found a cost-effective and environmentally friendly way to extract these metals from coal byproducts.Using byproducts of coal production from the Northern Appalachian region of the U.S.,the team investigated whether a chemical process called ion exchange could extract REEs in a safer manner than other extraction methods.Results show that ion exchange is more environmentally friendly and requires less     

Technological development

正Technology for recovering REEs from coal ash takes step forward In a project managed and co-funded by DOE Fossil Energy's National Energy Technology Laboratory (NETL),an industry/academic research partnership has taken a significant step toward developing a pilot-scale test facility for creating a more effective way to harvest rare earth elements (REEs)from coal ash-a by-product of coal combustion,created when coal is burned to generate energy.     

Technological development

<正>Recvcling the Rare Earth Metals of E-Waste Recycling the valuable rare earth metals found in advanced electronics from smartphones to plasma screen TVs has been a challenge for both manufacturers and environmental groups.Yale researchers,though,have developed a technology that could recover these materials for reuse.Desiree Plata,the John J.Lee Assistant Professor of Chemical and Environmental Engineering,and Megan     

Technological development

<正>Researchers Publish Study on Rare-Earth Garn Researchers in the Physics Department and Institute for Nanoscience and Engineering recently published findings that may advance the understanding of rare-earth garnets,a promising material useful as a magnetic insulator in applications including magnetic recording devices,thermoelectric generation,microwave devices     

Technological development

<正>Rare Element Resources'Proprietary Separation Technology Successfully Delivers Multiple,High-Purity Rare Earth Products in an Efficient and Environmentally Sound Process Rare Element Resources Ltd.(the"Company")(NYSE MKT:REE and TSX:RES),a strategic materials company focused on delivering rare earth products to technology industries by advancing the Bear Lodge Critical Rare Earth Project,announced successful completion of bench-scale testing of its proprietary rare