山西某金红石矿选矿试验研究

山西某金红石矿采用重选主干流程进行选别,精矿产品TiO2品位为90%左右,但金红石(TiO2)的回收率不足50%。为提高金红石的选矿回收率,开展了以浮选为主干流程的选矿工艺研究。确定的选矿方案为两次浮选抛尾─金红石浮选(一次粗选、两次精选)─浮选精矿除杂(弱磁选—强磁选—重选)。全流程试验结果表明:采用浮选主干流程大大提高了精矿TiO2的回收率,总精矿TiO2回收率为69.25%,金红石矿物的回收率达到86.42%,其中精矿1含TiO289.58%、TiO2回收率46.84%;精矿2含TiO280.53%、TiO2回收率22.41%。同时综合回收了磁铁矿和钛铁矿。     

东海县金红石矿中石榴子石的综合回收

东海县金红石矿是一个大型的榴辉岩型金红石矿床,但金红石（ＴｉＯ２）品位只有２．８％,而伴生石榴石矿物品位达到４０％,综合利用石榴子石是开发该矿的关键,因此在其设计中,浮选金红石前先磁选综合回收石榴子石产品,将取得较好的经济效益。     

陕南地区角闪岩型难选金红石矿选矿试验研究

陕南地区某角闪岩型难选金红石矿含TiO_23.35%,主要脉石矿物为石英、白云石、绿泥石等,有用矿物嵌布粒度微细,矿物嵌布关系复杂,分选难度大。采用摇床抛尾,粗精矿再磨后浮选金红石,浮选精矿酸洗后再脱硫的流程可获得TiO_290.56%,回收率为50.24%的金红石精矿,其中含S 0.025%、P0.021%、TFe 0.56%,精矿指标达到天然金红石精矿二级标准,为陕南地区金红石矿的开发利用提供良好的技术借鉴。     

潜水层以下海滨砂矿毛矿精选新工艺研究

究了含有独居石、钛铁矿、锆英石、金红石和锡石的潜水层以下海滨砂矿中毛矿精选新工艺，毛矿重选富集后湿式强磁选。磁性产品在自然ｐＨ值条件下，添加水玻璃、ＭＳ－５浮选独居石，浮选精矿经磁选后得品位高于６５％的独居石精矿；独居石浮选尾矿通过磁选得到钛铁矿精矿。非磁性产品用摇床丢尾并将有用矿物分成３组粗精矿和１组中矿，锆英石粗精矿和中矿采用分流流程、捕收剂Ｂ３和抑制剂ＲＷ，在弱酸性条件下浮选，浮选精矿电选除钛后得锆精矿特级品和一级品；锆英石浮选尾矿经电选和金红石粗精矿采用浮选－电选流程均可获得含ＴｉＯ２高于９０％的金红石精矿。锡石粗精矿用电选精选得锡石精矿。     

采用浮选-磁选流程使金红石回收率逾70％

湖北省地质实验研究所对湖北枣阳金红石开展的浮选-磁选工艺试验,使得金红石的回收率达到70％～74％,这项成果对湖北省乃至全国金红石的开发具有重要意义。湖北枣阳金红石矿为我国大型原生金红石矿之一,由于选矿指标不理想,经济效益差。20世纪70年代建成的选厂至今处于关停状态。几十年来不少科研单位及大专院校曾进行过试验研究,     

涞水金红石选矿试验研究

正概述涞水金红石矿属原生矿，矿石粒度细是其主要持证，—10μm占22．28％，且含泥量大，细泥的干扰严重影响着最终产品的技术指标。本试验研究，选用重选一浮选一介电射频联合流程，最终精矿品位（TiO2）85．64％，回收率22．47％（开路）；次精矿品位80．22％，回收率1753％。虽然精矿品位达到了技术指标，但是回收率偏低。随着介电射频选矿工艺的改进，将会得到满意的结果。2深水金红石矿石性质及特征2．1光谱分析（见表1）22原矿化学成分化学分析结果为（％）：TIO。3·87、FCZO38．56、SIO246sl、A12（）s1862、CS（）O．99、M…     

原生金红石矿浮选药剂研究进展

我国原生金红石矿具有矿物成分复杂、目的矿物品位低、嵌布粒度较细等特点, 浮选法是回收利用金红石和提高其品位的重要手段, 其中浮选药剂是关键。浮选金红石的捕收剂主要有脂肪酸类、膦酸类、胂酸类、羟肟酸类, 调整剂可分为活化剂与抑制剂。为促进金红石选矿技术的进步, 以及为选矿工作者们提供技术理论的参考, 文章在概述了金红石矿性质、浮选难点以及微纳气泡浮选的基础上, 对捕收剂、抑制剂、活化剂的研究进展与作用机理进行了详细的阐述, 以加深对原生金红石矿浮选药剂的认识与了解, 并对未来药剂的研究方向进行了展望。      

某难选金红石矿选矿试验研究

某金红石矿品位较低,嵌布粒度细,属难选微细粒金红石矿。本文采用浮选抛尾作为金红石选别的预选作业,可一次性抛尾72.27%;抛尾后的粗精矿再采用重选、再磨酸浸、浮选的工艺流程,获得了含TiO290.28%、回收率为47.37%的金红石精矿。     

金红石与石榴石浮选分离试验研究

针对榴辉岩型金红石矿石中金红石与石榴石分离难的问题,以金红石与石榴石纯矿物为对象,分别研究了捕收剂苯乙烯磷酸(SPA)、活化剂硝酸铅、抑制剂氟硅酸钠、矿浆p H对金红石和石榴石浮选行为的影响,并对金红石与石榴石的人工混合矿进行了浮选分离工艺条件研究。纯矿物浮选试验结果表明:SPA对金红石和石榴石都具有捕收能力,硝酸铅对金红石和石榴石均具有活化作用,氟硅酸钠能选择性抑制石榴石;人工混合矿浮选试验表明:在矿浆p H=6,捕收剂SPA浓度为1×10-5 mol/L,活化剂硝酸铅浓度为1×10-4 mol/L,抑制剂氟硅酸钠浓度为2.5×10-4 mol/L情况下,可高效浮选分离金红石和石榴石的人工混合矿,得到金红石含量达73.83%、回收率达86.62%精矿。     

金红石浮选药剂研究进展

浮选是金红石选别的重要手段,为了促进金红石选矿技术的进步,从捕收剂、调整剂两方面对金红石浮选药剂进行了梳理、总结。金红石浮选的主要捕收剂为脂肪酸类、膦酸类、胂酸类、羟肟酸类等,在生产实践中,各类捕收剂均存在一定的局限性;调整剂包括活化剂和抑制剂,活化剂主要有硝酸铅,通过增强矿石表面钛质点的活性来活化金红石;抑制剂主要为反浮选抑制金红石的硫酸铝和糊精,以及抑制脉石矿物的六偏磷酸钠、氟硅酸钠和羧甲基纤维素(钠)等。对浮选药剂种类及其在矿物表面作用机理的分析,可加深对金红石矿浮选药剂的认识,为选矿工作者提供技术参考。     

New energy vehicle:an opportunity for rare earth magnets

<正>Extracted from Securities Guide 1.Popularity of new energy vehicles—an irresistible market trend1.1 Progress of new energy vehicles Chinese Premier Li Keqiang said recently on a visit to Xi'an BYD Autos that new energy vehicles,especially new energy bus,can lessen environment and noise pollution.He encouraged the use of new     

China rare earth market review

正November 1~10,2014Chinese rare earth market was still inactive.Demand for rare earth products was weak.Consumers took a wait-and-see attitude for lower price.As it was an off season for rare earth products,it was expected that prices of rare earth could continue turbulence at the bottom in short terms.Due to a sharp drop,demand for rare earth from downstream recovered.Affected by new energy vehicles,wind powder and energy-efficient appliances,production of rare earth permanent     

China rare earth market review

正August 1~10,2014 There was some good news in rare earth industry recently.Restructuring plans of rare earth groups led by Baotou IronSteel Group and Xiamen Tungsten Group respectively have been approved by MIIT.And rare earth storage policy,which had been expected for a very long time,has been launched officially.Pushed by the good news,rare earth price started to rebound since August 5.Price of didymium oxide and dysprosium oxide rose about 1% to 2%,averagely.About 10% of     

China rare earth market review

正July 1~10,2014Due to weak demand from downstream industry and slow transactions,rare earth market remained weak and price of rare earth products continued to decline.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,     

注浆加固技术在十三矿-685 m进风大巷中的应用

针对煤矿开采深度不断向深部延伸,掘进巷道受深部高应力的影响越来越大,巷道围岩整体稳定性差,矿山压力显现越剧烈现象,一般锚网喷加锚索支护无法从根本上控制巷道的变形。总结了平煤股份十三矿-685 m进风大巷注浆加固技术,依据对巷道掘进之后变形监测数据的采集,对巷道变形机理进行分析研究,并对注浆时段进行了合理选择,在对巷道的注浆工艺进行了充分论证的基础上,对巷道进行了注浆。注浆后效果表明:巷道滞后注浆时间段的选择非常重要,巷道在恰当的时间内进行注浆加固施工,能有效控制巷道的变形,巷道注浆后变形量明显减小,岩体的稳定性明显增强,减少了巷道日常维修工作,降低了矿井的生产成本,保障了矿井的安全生产。     

Brief news

正China Minmetals Rare Earth Construction of Jianghua Separation Plant is set to complete at the yearend Civil works of Jianghua Separation Plant have been finished and the company is installing and debugging equipments now.It is estimated that construction of Jianghua Separation Plant will be     

Brief news

正Total transactions of rare earth in Rare Earth Ex-change Center of Hunan South Rare and Precious Metal Exchange neared 40 billion yuan from January to October From the opening in January of this year to the end of October,the total transaction of rare earth products in Rare Earth Exchange Center of Hunan South Rare and Precious Metal Exchange neared40 billion yuan.There are 16 varieties including dysprosium oxide and terbium oxide traded on the exchange center,one of the largest trading platforms for rare earth oxides in China.     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

Theoretical basis for optimal collector concentrations and pulp pH values during flotation of sulfide-free minerals

A hypothesis that associates optimal conditions of mineral flotation with a zero charge of their surface is put forward. This hypothesis serves as a basis for a methodology to obtain and verify quantitative physical-chemical models for a minimal necessary concentration of a collector during flotation of sulfide-free minerals. These models may be of use for upgrading engineering processes of flotation and as a job for the concentration plant automation systems. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 2, pp. 89–99, March–April, 2006.