分散剂NM-3对东鞍山含碳酸盐中矿浮选的影响

以NM-3为分散剂, 针对东鞍山含碳酸盐中矿进行了分散浮选试验研究, 确定了最佳分散浮选的工艺条件, 即控制pH值为12.0, 分散剂NM-3用量为200 g/t, 抑制剂淀粉用量为1 400 g/t, 活化剂氧化钙用量为400 g/t和捕收剂KS-Ⅲ用量为800 g/t, 经一粗一精分散浮选闭路试验获得了铁精矿品位为62.32%、回收率为42.57%的良好指标。分散浮选不仅流程简单, 而且获得了良好的指标, 为利用含碳酸盐中矿奠定了技术工艺基础。     

分散剂对东鞍山磁选混合精矿菱铁矿正浮选的影响

为解决东鞍山磁选混合精矿中细粒菱铁矿黏附罩盖在粗颗粒赤铁矿和石英等矿物表面造成浮选指标下降的问题。考察了在分步浮选第一步浮选中添加分散剂对菱铁矿正浮选的影响,以期找到适宜的分散剂来促进矿浆的分散,改善浮选指标。结果表明,添加分散剂有利于矿浆的分散,提高浮选指标。对混磁精以柠檬酸为分散剂首先进行菱铁矿正浮选,正浮选尾矿经1粗1精2扫赤铁矿闭路反浮选,最终获得铁品位为67.89%、回收率为69.35%的铁精矿。     

用分散剂NM-1优化东鞍山磁选粗精矿提质降杂工艺

东鞍山选矿厂原正浮选菱铁矿、反浮选分离赤（磁）铁矿与石英的工艺已不能适应采出矿石菱铁矿含量上升的情况,故以NM-1为微细粒菱铁矿的分散剂,对东鞍山磁选粗精矿进行了单一反浮选工艺研究。结果表明,在NM-1作用下,采用1粗2精1扫、中矿顺序返回的单一反浮选工艺流程处理该粗精矿,可获得铁品位为66.37%、回收率为75.00%的铁精矿;优化后的工艺流程更简洁,在精矿铁品位下降1.47个百分点的情况下铁回收率提高了5.53个百分点,达到了优化工艺流程、提高经济技术指标的效果。     

东鞍山含碳酸盐磁选混合精矿分步与分散浮选协同工艺研究

东鞍山磁选混合精矿主要有用矿物为赤铁矿以及少量的菱铁矿和磁铁矿,脉石矿物主要为石英,铁矿物多呈细颗粒存在,铁在-37 μm粒级分布率达到82.55%。为实现东鞍山含碳酸盐磁选混合精矿中铁矿物的有效分选,采用分步与分散协同浮选工艺进行试验。结果表明：以柠檬酸为分散剂、淀粉为抑制剂、KS-Ⅲ为捕收剂经菱铁矿1次正浮选,正浮选尾矿以NaOH为pH调整剂、淀粉为抑制剂、CaO为活化剂、KS-Ⅲ为捕收剂经1粗1精2扫赤铁矿反浮选闭路试验,获得了铁品位为67.89%、回收率为69.35%的铁精矿。分步与分散协同浮选通过将分步浮选工艺和分散浮选技术结合起来形成协同作用而对含碳酸盐难选铁矿石产生了较好的分选效果。     

有机分散剂对含碳酸盐铁矿石浮选的影响研究

目的在于确定能够有效分散含碳酸盐铁矿石的分散剂。通过有机分散剂种类及用量条件试验,确定了最佳分散剂为NMS-3,其最佳用量为200 g/t。制定了适合选别东鞍山含碳酸盐混合磁选精矿的一次粗选、两次精选、一次扫选的分散浮选工艺流程。闭路试验获得了品位66.37%、回收率75.00%的铁精矿。该浮选指标良好,且工艺流程简单。论文运用DLVO理论对NMS-3分散机理进行了初步探讨,为含碳酸盐铁矿石的有效利用提供理论基础。     

有机分散剂对含碳酸盐铁矿石浮选的影响

目的在于确定能够有效分散含碳酸盐铁矿石的分散剂。通过有机分散剂种类及用量条件试验,确定了最佳分散剂为NMS-3,其最佳用量为200 g/t。制定了适合选别东鞍山含碳酸盐混合磁选精矿的一次粗选、两次精选、一次扫选的分散浮选工艺流程。闭路试验获得了品位66.37%、回收率75.00%的铁精矿。该浮选指标良好,且工艺流程简单。论文运用DLVO理论对NMS-3分散机理进行了初步探讨,为含碳酸盐铁矿石的有效利用提供理论基础。     

从某泥岩型铀矿中浮选碳酸盐矿物的研究

针对某泥岩型铀矿,采用浮选碳酸盐矿物的方法来降低铀浸出时的试剂消耗。矿石含泥量很高,且只能在不脱泥的情况下进行浮选,调节矿浆温度至30℃,添加水玻璃作为矿泥分散剂和脉石矿物的抑制剂,用氧化石蜡皂作为碳酸盐矿物捕收剂,在条件试验的基础上采用"一粗二精二扫、中矿顺序返回"的闭路流程,在10台1.5L连续浮选设备中进行连选试验。结果表明,该浮选方法可以有效地将碳酸盐矿物浮选出来,得到w(CO_2)为23.34%的碳酸盐矿物精矿产品,以CO_2计回收率为88.26%。     

低品位锡细泥选择性絮凝浮选试验研究

试验矿样中矿泥含量高,矿物种类繁多,有用矿物锡石品位低,仅为0.40%,嵌布粒度微细,可浮性与锡石相近的方解石类碳酸盐矿物含量高,导致该锡细泥回收难度大,本试验研究了选择性分散-絮凝对锡细泥浮选回收的影响。锡细泥在矿浆pH值为6.5的环境下,添加分散剂水玻璃+CMC、絮凝剂APAM进行预处理,实现微细矿粒选择性分散-絮凝,之后采用组合捕收剂BY-9+P86,经过"一粗二精一扫"闭路浮选流程可得到品位10.34%、回收率80.83%的锡精矿。     

新型绿色浮选体系中菱锰矿与碳酸盐脉石矿物的浮选行为研究

以菱锰矿与碳酸盐脉石矿物白云石、方解石和菱铁矿为研究对象,通过浮选试验和Zeta电位、FTIR和XPS分析,系统研究了在新型绿色浮选药剂体系中矿浆p H值与药剂用量对4种碳酸盐矿物浮选行为的影响和界面作用机理。结果表明,捕收剂ZJS与抑制剂JBS可以发挥协同作用,是菱锰矿与碳酸盐脉石矿物反浮选分离的最佳组合药剂;在ZJS用量为60 mg/L、JBS用量为20 mg/L时,菱锰矿的浮选回收率仅为10%,白云石的浮选回收率大于40%,方解石和菱铁矿的浮选回收率均超过55%。Zeta电位、FTIR和XPS分析结果表明,在ZJS捕收剂浮选体系中,抑制剂JBS均以物理吸附方式作用于4种碳酸盐矿物界面,且JBS在菱锰矿界面的吸附能力强于其他碳酸盐脉石矿物,使菱锰矿亲水性增强,有利用反浮选分离;该新型浮选体系有望实现中高品位碳酸锰矿石中部分钙、镁、铁碳酸盐的脱出,为碳酸锰矿石进一步提质、降杂提供依据。     

白钨矿浮选

富集含白钨矿的钨矿石并用浮选法回收白钨。粉状矿与水混合,制备含固体20～40％的矿浆。矿浆与下述药剂混合进行搅拌:(1)≥1碱金属碳酸盐,以达PH=10～11;(2)碱金属硅酸盐,抑制硅酸盐与碳酸盐脉石;(3)脂肪酸捕收剂,以覆盖白钨矿矿粒。然后,向矿浆中添加起泡     

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     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

唐口煤矿深部复杂开采工作面瓦斯分源涌出规律研究

研究工作面瓦斯涌出规律对工作面瓦斯治理有重要意义。为了得到唐口煤矿深部3号煤层复杂开采条件下工作面回采时期瓦斯涌出时空演化规律,选取6304工作面作为对象,采用实测方法研究6304工作面瓦斯涌出规律。结果表明:6304工作面瓦斯涌出量为6.534 m³/min,其中煤壁占34.27%,落煤占29.62%,采空区占36.11%;沿工作面倾向由低到高,瓦斯浓度整体为上升趋势,其中1—76号架工作面瓦斯浓度小于0.20%,76—102号架瓦斯浓度上升明显,最大为0.387%;上隅角的后部采空区是工作面的瓦斯主要涌出源,上隅角1号测点瓦斯浓度0.78%,上隅角周边3号、5号、7号、8号、9号测点瓦斯浓度平均为0.643%;周期来压时,上隅角瓦斯相对平时较高。研究为针对性的瓦斯分源监控与灾害防治提供基础。