FeS04取代H2S04选别黄铁矿的研究

研究了用FeSO4取代H2SO4作调整剂从浮选铅锌的尾矿中回收黄铁矿的可能性.将FeSO4加入到浮选铅锌的尾矿中,使受抑制的黄铁矿恢复可浮性.试验表明,当FeSO4用量为15～18 kg/t时,矿浆pH由12.8降到8左右.用乙黄药作捕收剂,可获得的硫精矿品位47.26%,回收率87.88%.该指标与用H2SO4的选别指标相近.     

从某铅锌矿尾矿中回收微细粒级黄铁矿试验研究

某高硫铅锌矿采用高碱优先浮选法, 优先浮选铅锌, 再从铅锌尾矿中回收硫。在铅锌尾矿浓缩过程中产生大量微细粒级尾矿, 这部分尾矿-10 μm粒级产率为71.5%, 硫品位为16.5%, 并且硫主要以黄铁矿形式存在。为有效回收黄铁矿资源, 对该微细粒级尾矿进行了试验研究, 经过一次粗选两次精选一次扫选的开路试验流程, 获得硫品位47.22%、回收率67.51%的硫精矿。     

环江某铅锌矿中黄铁矿的浮选试验研究

针对广西环江某铅锌多金属硫化矿铅锌浮选尾矿中黄铁矿的特殊性,采用新型捕收剂C08与新型活化剂F09组合使用,解决了硫酸等活化剂不能活化的难题,可获得硫精矿S品位48.50%、硫作业S回收率94.71%的良好选别指标。     

铅锌矿浮选尾矿选铁除硫试验研究

新疆某铅锌银铁多金属矿石,含有磁黄铁矿2%,在铅锌银浮选尾矿综合回收磁铁矿的流程中,致使铁精矿硫含量超标。通过对铅锌浮选尾矿选铁除硫试验研究,确定除硫药剂制度为：组合活化剂硫酸368g/t Lc 20g/t,捕收剂丁黄药15g/t DH 5g/t,可以获得全铁品位67.97%,含硫0.19%的铁精矿,磁铁矿中铁回收率达87.64%的优良指标,且除硫药剂成本低廉。     

某高砷高硫金铅锌多金属硫化矿弱磁选硫试验

某高砷高硫金铅锌多金属硫化矿选矿厂现采用金铅—锌—硫优先浮选工艺,由于原矿中含有大量的磁黄铁矿,恶化了锌浮选效果,导致锌精矿品位低,为了改善锌浮选指标,研究采用弱磁选预先选出磁黄铁矿。为了确定弱磁选的适宜设置地点,进行了入浮原矿、锌浮选原矿、锌浮选尾矿的弱磁选试验,并考查了金、银、铅、锌等有价元素在弱磁选精矿中的损失情况。试验结果表明:锌浮选之前预先选出磁黄铁矿,锌金属损失率较低(8.30%),且弱磁选尾矿中的锌品位可由1.09%富集到1.76%,并可排除磁黄铁矿对锌浮选的干扰,所以在入浮前设置弱磁选作业具有可行性。     

用重选法从铅锌浮选尾矿中回收黄铁矿试生产成功

<正> 我矿铅锌浮选尾矿富含黄铁矿。原采用在尾矿库自然沉积,从尾矿矿浆流源头的黄铁矿富集带中用人工挖掘部分黄铁矿作为硫精矿出售,硫精矿质量低且不稳定,黄铁矿损失大。为了保证硫精矿质量,提高硫回收率和企业经济效益,在广州有色金属研究院的协助下,我矿新建一座用螺旋溜槽—旋流器从铅锌浮选尾矿中回收黄铁矿的重选车间。通过试生产及半年以来的生     

某高硫铅锌矿石选矿试验

某高硫铅锌矿石中磁黄铁矿和黄铁矿含量大、铅锌嵌布关系复杂、嵌布粒度细等,以新药剂BK-509和BK-512抑制硫化铁矿物,采用磁选-铅锌依次优先浮选工艺进行了铅、锌、硫分离试验。结果表明,矿石在磨矿细度为-0.074 mm占90%的情况下,经1粗1精弱磁选、2粗2扫浮选选铅、铅粗精矿再磨至-0.043 mm占85%情况下4次精选、铅扫选尾矿1粗2扫选锌、锌粗精矿再磨至-0.043 mm占90%情况下4次精选,获得了铅品位为56.71%、回收率为76.85%的铅精矿,锌品位为45.98%、回收率为75.57%的锌精矿。试验的铅、锌精矿指标理想,可作为铅锌回收工艺流程设计的依据。     

云南某低品位铅锌硫化矿选矿工艺研究

云南某低品位铅锌硫化矿石含铅0.76%、锌2.10%,并伴生少量银,矿石中铅主要以方铅矿形式存在,锌主要以闪锌矿形式存在。为了合理开发该资源,对其进行了选矿工艺研究。结果表明,在-74μm占80%的磨矿细度条件下,采用乙硫氮+丁基黄药作铅的捕收剂、ZnSO4+Na2SO3作锌的抑制剂优先浮选铅,尾矿用硫酸铜活化,用丁基黄药作捕收剂浮选锌,获得了铅品位52.11%、回收率81.56%的铅精矿和锌品位50.73%、回收率89.16%的锌精矿,实现了铅锌分离。     

某地区磁黄铁矿型铅锌硫化矿浮选试验研究

对某地区难选磁黄铁矿型铅锌硫化矿开展了铅、锌综合回收工艺试验研究。以新型酯类铅矿物捕收剂ZQ-11与25^#黑药组合作铅捕收剂浮选铅矿物,铅浮选尾矿进行磁选脱硫,脱硫尾矿以丁基黄药作捕收剂浮选锌矿物,在原矿铅品位1.84%、锌品位4.53%情况下,闭路试验获得了铅品位62.57%、含锌3.30%、铅回收率89.49%的铅精矿和锌品位43.37%、含铅1.01%、锌回收率85.79%的锌精矿,实现了难选磁黄铁矿型铅锌硫化矿的有效回收。     

过氧化氢-氧化钙强化抑制煤系黄铁矿的作用机理研究

煤系黄铁矿的有效抑制是煤泥浮选脱硫的关键。通过浮选试验和矿物表面分析技术研究过氧化氢(H2O2)和氧化钙(CaO)对煤系黄铁矿的抑制效果强化及作用机理。研究结果表明:单独使用 H2O2 或 CaO 时,在最佳用量条件下,煤系黄铁矿上浮率分别为 15.15% 和 15.45%,当同时加入CaO(2kg/t)及 H2O2(60kg/t)时,煤系黄铁矿上浮率最低为8.97%,说明 H2O2 能强化 CaO 对黄铁矿的 抑 制 作 用。CaO 与黄铁矿作用可产生少量含钙物质(主要是硫酸盐)覆盖于黄铁矿表面,一定程度上降低了黄铁矿的表面疏水性。H2O2 与 CaO 共同作用条件下,黄铁矿表面氧化还原反应加剧,促进表面 Fe—S键断裂和 Fe、S离子的溶出,以及含 Fe氧化产物 Fe2 (SO4)3,Fe(OH)3,Fe2O3 和 含 Ca氧 化 产 物CaSO4,Ca(OH)2 的生成和覆盖,强化对煤系黄铁矿的抑制     

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。