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| 1 | 离子型稀土矿浸取剂遴选及柱浸工艺优化研究显示文摘采用规格为Φ6 cm×20 cm的有机玻璃柱柱浸方式,开展了离子型稀土矿新型无氨氮浸取剂的遴选及柱浸工艺优化研究,重点考察了浸取剂类型、浸出剂质量分数、浸出剂用量、浸出p H值对稀土浸出率的影响。研究结果表明,遴选出的硫酸镁作为离子型稀土矿新型无氨氮浸取剂,稀土浸出的效果较好,并确定了较优柱浸工艺条件:浸出剂硫酸镁质量分数为2%,浸出剂用量为液固体积质量比1.0∶1.0,浸出p H值为5.0,水洗用量为液固体积质量比1∶1,浸出的温度为室温。在上述条件下,进行3次平行实验,稀土平均浸出率达到98.40%。在此基础上,采用规格为Ф11 cm×100 cm的有机玻璃柱进行扩大柱浸实验,扩大实验结果表明,该浸出工艺稳定,稀土浸出率稳定,达到99%以上。 | 王瑞祥 谢博毅 余攀 张兆雪 毛继勇 熊家春 | 2015 | 稀有金属2015，39，11： | 26 |
| 2 | Leaching kinetics of ionic rare-earth in ammonia-nitrogen wastewater system added with impurity inhibitors显示文摘Ammonia-nitrogen wastewater is produced during the dressing and smelting process of rare-earth ores.Such wastewater includes a very high concentration of NH4+, as well as other ions(e.g., NH4+, RE3+, Al3+, Fe3+, Ca2+, Cl–, and Si O32–) with a p H of 5.4–5.6.Its direct discharge will pollute, yet it can be recycled and used as a leaching reagent for ionic rare-earth ores.In this study, leaching kinetics studies of both rare earth ions and impurity ion Al3+ were conducted in the ammonia-nitrogen wastewater system with the aid of impurity inhibitors.Results showed that the leaching process of rare-earth followed the internal diffusion kinetic model.When the temperature was 298 K and the concentration of NH4+ was 0.3 mol/L, the leaching reaction rate constant of ionic rare-earth was 1.72 and the apparent activation energy was 9.619 k J/mol.The leaching rate was higher than that of conventional leaching system with ammonium sulfate, which indicated that ammonia-nitrogen wastewater system and the addition of impurity inhibitors could promote ionic rare-earth leaching.The leaching kinetic process of impurity Al3+ did not follow either internal diffusion kinetic model or chemical reaction control, but the hybrid control model which was affected by a number of process factors.Thus, during the industrial production the leaching of impurity ions could be reduced by increasing the concentration of impurity inhibitors, reducing the leaching temperature to a proper range, accelerating the seepage velocity of leaching solution, or increasing the leaching rate of rare earths. | 邱廷省 朱冬梅 方夕辉 曾清华 高广阔 朱华磊 | 2014 | Journal of Rare Earths2014，32，12： | 23 |
| 3 | 离子型稀土矿浸出过程主要物质浸出规律研究显示文摘采用柱浸法研究硫酸铵浸取离子型稀土矿过程中水、稀土、硫酸铵及其他杂质离子的浸出规律.研究表明,离子型稀土矿矿土对水有较强的吸附能力,浸矿后,矿土的含水率由17.74%增加到33.7%.浸出过程中,稀土浸出率可达99.98%,杂质中Al3+浸出量比较大,Si O32-浸出量较小,而Fe3+几乎不浸出,各离子的浸出先后顺序为:Si O32-、RE3+、Al3+、Fe3+,杂质Al3+的浸出略滞后于稀土的浸出.Al3+、Fe3+浓度达到峰值时,p H值最低,随着浸矿剂和顶水的加入,浸出液的p H值开始上升,直至达到硫酸铵溶液的p H值和顶水的p H值. | 杨幼明 王莉 肖敏 黄金 蓝桥发 杜朝军 | 2016 | 有色金属科学与工程2016，7，3： | 20 |
| 4 | 离子型稀土矿浸出过程优化与分析显示文摘针对赣南不同性质离子型稀土矿浸出率不同等问题,为确定不同性质离子型稀土矿浸出最佳工艺匹配参数,进行了两种不同性质离子型稀土矿的浸出试验研究,并对其进行了工艺优化和浸出过程分析.结果表明,不同性质的离子型稀土矿浸出的工艺条件应有所不同,同时各工艺条件中的影响因素的大小关系也不一样,应根据稀土矿石性质确定浸出工艺条件. | 邱廷省 伍红强 方夕辉 | 2012 | 有色金属科学与工程2012，3，4： | 16 |
| 5 | Mixed rare earth concentrate leaching with HCl-AlCl_3 solution显示文摘A method of Baotou mixed rare earth concentrate leaching was investigated. According to the principle of complex leaching, the quadratic orthogonal regression experiment was used to investigate effect of six factors. An optimal condition of low energy and environment friendly was determined as follows: HCl acidity is 4 mol·L-1 , AlCl3 concentration is 2mol·L-1 , reaction temperature is 85℃, reaction time is 90 min, liquid to solid ratio is 35ml·g-1 , and stirring speed is 100 r·min-1 . According to this condition, the leaching ratio of mixed rare earth concentrate is 76.5 %. The analyses of X-ray diffraction shows that bastnasite disappears, and the main peaks of filter residue is monazite and cheralite after leaching of HCl-AlCl3 solution. The result indicates that REFCO3 of the mixed rare earth concentrate can be dissolved, but REPO4 remains in the leaching residue. This method provides a way to separate and extract rare earth. | Mei Li Xiao-Wei Zhang Zhao-Gang Liu Mi-Tang Wang Jia Liu Jian-Ping Yang | 2013 | Rare Metals2013，32，3： | 10 |
| 6 | Influence of cerium on hot workability of 00Cr25Ni7Mo4N super duplex stainless steel显示文摘The effect of Ce on hot workability of 00Cr25Ni7Mo4N steel melted in vacuum induction furnace was studied by Gleeble thermal simulation machine and scanning electron microscopy(SEM).The results showed that ductility of the steel with Ce addition was increased significantly because of increasing content of austenite,segregation of Ce at grain boundaries and modification of inclusion.The optimum range of Ce content in the steel was 0.030 wt.%-0.047 wt.%,and the optimum value was about 0.047 wt.%.The effect of rare earth on the improvement of hot workability would decrease after adding 0.062 wt.% Ce because of generation of bigger aggregated inclusions and formation of brittle intermetallic phases(Ce-Fe-Cr-Mn-Mo).The temperature of steady plastic deformation of the steel with Ce addition was reduced to 1000 oC at a strain rate of 10/s and 1050 oC at a strain rate of 50/s,respectively. | 王晓峰 陈伟庆 | 2010 | Journal of Rare Earths2010，28，2： | 9 |
| 7 | 浸矿剂阳离子活性与稀土浸出特性关系研究显示文摘浸矿剂阳离子活性与浸出特性是离子型稀土浸出率的两个重要影响因素,为研究二者间的相关性,自主研发了柱浸实验装置,并结合核磁共振技术,获得了试样浸矿过程微观孔隙结构演化、浸出速率、稀土浸出量与浸矿次数的关系。综合分析可知,浸矿剂阳离子活性与土样微观孔隙结构、浸出速率关联性不强,试样孔隙结构主要由初始孔隙决定,浸出速率由孔隙结构与颗粒迁移的聚集程度决定。浸矿剂阳离子活性是稀土浸出质量的重要影响因素,但不是唯一的影响因素,浸矿剂物质的量浓度在一定程度上影响浸出效率。 | 李士超 王晓军 邹远刚 黄广黎 聂亚林 | 2019 | 矿业研究与开发2019，39，3： | 3 |
| 8 | 磁尾矿的硼盐混合焙烧抑氟-酸浸提取稀土和制备KBF_4的研究显示文摘磁尾矿是包头白云鄂博矿经磁选后产生的尾矿,含有大量的稀土和氟资源,对其开发利用具有重大的环境和经济价值。利用F-B强的配位能力采用硼化物焙烧抑氟-盐酸浸出法,以硼砂为抑氟剂,650℃焙烧1.0 h后,稀土矿中RE-F的结合能力被高温下活泼的B弱化,焙烧混合矿继续在80℃条件下4.0 mol·L-1HCl中浸出3.0 h,氟浸出率为96.52%,稀土最大浸出率为76.68%。同样采用P204对浸出液进行萃取,稀土进入有机相,实现了氟、稀土的两相分离,萃余液中添加K+并调节pH,沉淀得氟硼酸钾,产物杂质单一,基本实现了氟的资源化和稀土与氟的分离。 | 李勇 雷红霞 黄小卫 | 2014 | 中国稀土学报2014，32，5： | 0 |
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