优先浮选稀土工业实践的调整与控制

新宝力格选矿厂是以包头富稀土中贫氧化矿为原料组织生产的。选矿厂采用优先浮选工艺回收稀土精矿。在生产中品级稀土精矿时采用一次粗选流程,生产高品级稀土精矿采用一次粗选多次精选流程。优先浮选稀土工艺具有流程结构简单,     

稀土选矿浮选过程控制系统设计

文章以某新建稀土选矿厂浮选流程为研究对象,在熟悉其工艺设备组成及工作原理的基础上,重点对浮选温度、浮选浓度等控制系统进行剖析与研究,该流程控制系统实行DCS控制,上位机采用PC计算机,下位机采用PLC系统作为现场控制单元,以灵活多样的分布式I/O接收现场传感检测信号,实现对稀土浮选流程的自动化控制。     

包钢选矿厂尾矿的稀土选矿

包钢选矿厂的尾矿中含有大量稀土，可再次利用。采用重选－浮选联合流程和单一浮选流程可使稀土富集。单一浮选流程简单，回收率相对较高，易于工业应用。     

牦牛坪重晶石、萤石回收工艺研究

针对四川江铜稀土牦牛坪稀土选矿厂稀土综合回收率较低,重晶石、萤石精矿品位不达标的现状,提出采用混合浮选工艺预先富集稀土、重晶石和萤石,然后采用湿式强磁选机分离稀土获得稀土精矿,最后对磁选尾矿进行重晶石和萤石依次优先浮选分离的新工艺,通过试验验证,该工艺解决了原设计工艺存在的问题,提高了选矿厂稀土综合回收率,并获得了合格重晶石精矿和萤石精矿。     

提高新宝力格稀土选矿厂生产水平的研究

通过对新宝力格稀土选矿厂优先浮选工艺的试验和生产数据的分析，研究了提高生产水平的途径。结果表明，降低磨矿细度（－２００目含量为９１％－９３％）、适当提高浮选深度（４５％）、提高原矿入选品位，实行轻抑制轻捕收药剂制度以及合理控制稀土精矿品位是选矿厂生产水平的有效途径。     

锡铁山浮选流程方案比较研究分析

根据技改的要求,要求新建选矿厂设备大型化、自动化、现代化。目前选矿厂磨浮车间设备小、系列多,势必要被淘汰新建。目前,西部矿业股份有限公司锡铁山分公司选矿厂的浮选流程分Ⅰ、Ⅱ、Ⅲ系列为"铅优先浮选,锌硫混浮再分离流程"、Ⅳ系列为"铅、锌顺序优先浮选流程"。依据现场实际生产指标,本次对"铅优先浮选,锌硫混浮再分离流程"、"铅、锌顺序优先浮选流程"进行了综合比较。     

氰渣有价金属综合回收工艺的改进试验研究及实践

某选矿厂自处理低品位铅矿石以来,氰渣浮选铅指标恶化.根据氰渣特性及流程现状对原工艺进行改进试验研究,采用高浓度预先搅拌脱油药、低浓度浮选、三次精选工艺流程,消除了过剩浮选油药与矿泥的不利影响,有效地提高了精矿质量,精矿的铅、银品位、回收率都有了大幅度提高.     

民主德国阿尔腾贝格锡选矿厂粗泥选矿工艺研究

本文叙述了云锡公司研究所对民主德国阿尔腾贝格锡选矿厂粗泥试料进行的全重选工艺和重——浮联合工艺的试验室指标。两流程的指标均比原选厂采用锡石浮选的指标好。     

从包钢选矿厂选铁尾矿中回收稀土研究概况与生产实践

本文对包钢选矿厂选铁尾矿矿石性质进行了小结。阐述了包钢选矿厂自投产以来,在回收铁矿物同时,回收稀土矿物的发展情况,并较重点介绍了国内研究单位所进行的选矿研究概况及目前选矿厂稀土生产实践。指出,要提高稀土产量,应从现有选铁流程中,充分利用强磁尾矿和强磁中矿的稀土矿物,并且开发和利用尾矿坝。     

铜钼选矿工艺的经济效益探讨

铜山钼铜矿属于矽卡岩型铜钼矿床,选矿厂用浮选法回收铜钼两种金属矿物。由于矿石性质(主要是含碳质矿物的干扰)和入选品位等复杂多变,选矿厂的浮选工艺流程几经改革。就其流程结构和产品方案来说,可分为三种类型,即单一选铜工艺,单一选钼工艺和铜钼混选分离工艺。历年来三种方法处理的矿石量分布如图1,主要选别指标累计见表1。     

某氟碳铈稀土矿混合浮选捕收剂优化试验研究

四川省牦牛坪稀土矿是我国第二大轻稀土矿,主要矿藏有氟碳铈稀土矿、伴生萤石和重晶石等。为提高微细粒级稀土回收率,采用混合浮选工艺替代原稀土浮选工艺,并研发了新型捕收剂CXS-211,优化试验提高了新药剂对矿石性质的适应性。闭路试验结果表明：新药剂可获得稀土REO回收率92%以上、萤石回收率88%以上的混浮精矿。     

Progress of Separation and Determination Methods for Rare Earth Elements

~~Progress of Separation and Determination Methods for Rare Earth Elements     

包钢尾矿回收稀土的试验研究

对包钢尾矿坝的稀土进行了选矿工艺研究,在实验室里探索用串级闭路工艺回收包钢尾矿坝中的稀土,为白云鄂博矿稀土的可持续发展寻找新的资源综合利用方向。所阐述的工艺可以使稀土的品位达到60%,回收率达到87%,完全可以达到工业生产的标准,并且同时对萤石做了一定的工作,为下一步萤石的回收提出了看法。     

羟肟酸类捕收剂在稀土选矿中的应用与研究进展

羟肟酸是一类选择性能很好的螯合捕收剂，广泛应用于氟碳铈矿和铌钽矿等稀土矿的浮选，在稀土矿的浮选中具有不可替代的作用。本文分别对烷基羟肟酸、烷基水杨醛肟、水杨羟肟酸、2-羟基-3-萘甲羟肟酸、1-羟基-2-萘甲羟肟酸、N-羟基邻苯二甲酰亚胺六种羟肟酸类捕收剂的结构、合成以及对稀土矿的捕收性能等进行了综述。     

羟肟酸类捕收剂在稀土矿物浮选中的应用及发展

综述了稀土有效捕收剂羟肟酸的浮选性能及其在稀土矿物浮选中的作用机理,介绍了我国几大稀土矿应用羟肟酸选别稀土矿物的情况,讨论了羟肟酸类捕收剂在稀土矿物浮选中的发展和方向。     

REEs fractionation and sedimentary implication in surface sediments from eastern South China Sea

To get features of rare earth elements(REEs)fractionation,106 surface sediment samples from eastern South China Sea were determined for REEs combined with major and trace elements by ICP-MS.The distribution pattern of REEs,strong correlation between REEs and Al,North American shale composite(NASC)normalization all suggest a dominant crustal source for REEs in the research area.However, distinct fractionation among REEs was observed in surface sediment from area with water depth over 2000 m,confirmed by the strong positive correlation among light rare earth elements(LREEs)and among heavy rare earth elements(HREEs)but weaker relationship between LREEs and HREEs.Eluviation by Cl – might be a key role on the fractionation of REEs,comparing with factors such as grain size,co-precipitation with Fe and Mn hydroxide,calcareous and siliceous biogenic precipitation.The fractionation among REEs could be used as index to illustrate the sedimentary environment in reverse.     

我国氟碳铈矿选矿生产工艺进展

自１９９４年以来，随着轻稀土产品市场的好转，稀土行业的龙头工艺—稀土选矿生产工艺流程也得到了促进与发展，涌现出几种新的生产工艺流程和稀土矿物浮选药剂。本文就我国内蒙古白云鄂博矿、四川冕宁矿、山东微山矿的稀土选矿工艺流程予以介绍，并对上述地区生产工艺中存在的问题加以讨论。     

Rare earth elements: Properties and applications to methanol synthesis catalysis via hydrogenation of carbon oxides

Methanol (CH₃OH) is an important industrial chemical with a wide variety of uses. Industrial methanol synthesis catalysts are typically composed of Cu, Zn, and Al, but the use of catalysts incorporating rare earth elements has been shown to improve the catalytic performance. Due to their unique chemical and physical properties, the use of rare earth elements (scandium, yttrium, and the lanthanides) in catalysis in general has continued to increase over the past few decades, while the use of rare earth in methanol synthesis catalysts has not, despite often improving performance. The ability of several of the rare earth elements (Pr, Ce, Eu, Tb, Yb) to easily switch between oxidation states makes them beneficial for many different types of catalysts. However, for methanol synthesis the surface basicity is an important property, and the basic nature of the rare earth elements can be used to tune the basicity of catalysts. A small number of correlations between rare earth properties and catalytic performance have been observed, but often do not apply to other catalysts. Properties such as strength of basic sites, ionic radius, and electronegativity have been found to correlate with performance results such as activity or selectivity.     

风化壳淋积型稀土矿浸出液沉淀浮选溶液化学分析

通过对风化壳淋积型稀土矿浸出液沉淀浮选进行溶液化学研究,探讨了体系pH、沉淀剂及浮选剂对沉淀浮选的影响.结果表明,风化壳淋积型稀土矿浸出液杂质可通过优先沉淀浮选以氢氧化物或焦磷酸盐或聚磷酸沉淀形式全部有效除去,最后将优先沉淀浮选除杂后浸出液中和提高pH值,再用沉淀浮选方法有效提取稀土.     

Electronic Theoretical Study of the Interaction between Rare Earth Elements and Impurities at Grain Boundaries in Steel

Rareearths(RE)aresurfaceactiveelements ,theirapplicationsinmetalmaterialscanbesum marizedaspurification ,modificationandall oying[1～ 3 ] .Itisaveryattractivesubjectthattheinter actionofREelementswithlowmeltingpointimpuri tiesintheregionofGBs ,suchasP ,S ,As ,Sbandsoon .ResultsofexperimentsshowthatsegregationinGBsofasmallamountofREinsteelrestrainsharmfulimpuritiessuchasP ,S ,As ,Pb ,Sb ,tosegregateto wardsGBs ,soREelementscancleanseandenhanceGBs ,therebyimprovethehightemperatureducti…