某高硅胶磷矿反浮选脱硅研究

与常规的阳离子捕收剂做比较,对BK430在某高硅胶磷矿中反浮选脱硅的应用进行了试验研究。试验结果表明,在酸性条件下,磨矿细度为-74μm占55%,以BK430为脱硅捕收剂,对原矿反浮选脱镁的粗精矿经过一次粗选、五次精选全开路浮选流程,可以获得含P2O530.39%,含SiO212.79%的磷精矿,P2O5回收率为92.70%。     

铝土矿反浮选脱硅技术研究

以河南某地中等铝硅比矿石为研究对象,围绕着铝土矿反浮选脱硅技术展开系统研究,研发专有分散剂BK500、选择性抑制剂BK501、含铝硅酸盐高效捕收剂BK421。试验采用两次脱泥、脱泥底流反浮选脱硅,最终获得Al2O3回收率为81.20%、铝硅比为10.82的合格精矿。     

BK430在铝土矿反浮选脱硅中的应用

考察了以BK430作为捕收剂对中国铝土矿资源中一水硬铝石、伊利石和高岭石3种典型矿物的浮选行为。单矿物试验结果表明:在不添加抑制剂和弱酸性条件下,BK430对高岭石和伊利石的捕收力明显强于一水硬铝石;添加一水硬铝石抑制剂DF,有助于进一步扩大一水硬铝石与2种铝硅酸盐矿物的可浮性差异;人工混合矿的试验结果与单矿物试验结果比较吻合。对河南某铝硅比为4.43的铝土矿进行了反浮选脱硅试验,经过脱泥—反浮选可以获得Al2O3/SiO2为9.21,Al2O3回收率为62.49%的精矿。BK430有望成为一种在近中性条件下铝土矿反浮选的脱硅捕收剂。     

叶轮转速对硅钙质胶磷矿双反浮选的影响

浮选机叶轮转速对硅钙质胶磷矿反浮选脱镁、反浮选脱硅有不同的影响。随着叶轮转速的增加,脱镁尾矿产率降低,MgO脱除率降低,BK424捕收能力略有减弱,选择性变化不大。随着叶轮转速的增加,反浮选脱硅尾矿产率增加,S iO2脱除率升高,BK430捕收剂略有增加,但是选择性明显变差,P2O5损失率增大。在阴离子捕收剂体系中,较高的转速导致粗粒白云石从矿化气泡脱落,降低了其上浮率;对磷灰石影响较小。在阳离子捕收体系中,较高的转速增加了细粒磷灰石与BK430的作用,增加了其上浮率。研究结果表明,降低浮选机叶轮转速可以提高磷精矿P2O5回收率。     

耐低温捕收剂BK425在某高镁胶磷矿中的应用

应用耐低温捕收剂BK425对某高镁胶磷矿进行了反浮选降镁试验研究,并与常规捕收剂进行了对比。在其他条件一定的情况下,考察了磨矿细度、硫酸用量、BK425用量、温度对降镁效果的影响。试验结果表明:BK425反浮选降镁的浮选性能最佳且受温度影响较小,是一种应用前景广阔的捕收剂。在磨矿细度为-0.074 mm 70%、BK425用量为600 g/t、硫酸作为调整剂的酸性条件下,经过1次粗选、1次精选和1次扫选的闭路浮选流程,可获得P2O5品位为28.76%、MgO品位为1.17%,P2O5回收率为91.78%的磷精矿。     

贵州某高镁高铝胶磷矿双反浮选降杂试验研究

以BK425为反浮选脱镁捕收剂,BK432为反浮选脱铝捕收剂,对贵州某高镁高铝胶磷矿采用双反浮选进行了提质降杂试验研究。原矿一段磨矿细度为-0.074 mm含量占70%,二段中矿再磨细度为-0.074 mm含量占75%,经过双反浮选闭路试验流程可以获得P2O5品位33.97%,倍半氧化物之和(Al2O3+Fe2O3)2.23%,Mg O含量0.73%,P2O5回收率73.71%的磷精矿。BK432捕收能力强,形成的脱铝泡沫较脆,容易消泡,流动性好,为反浮选脱铝闭路流程创造了良好的前提条件。     

BK431在某含铷长石与石英浮选分离中的应用

以BK431为长石捕收剂,对某强磁—脱泥底流进行了长石与石英的浮选分离试验研究。在其他条件一定的情况下,考察了药剂配比、硫酸用量、BK431用量、BK205用量和捕收剂种类对长石精矿的影响。在酸性条件下,以硫酸作为调整剂,BK431为捕收剂,BK205为起泡剂,经过2次粗选、1次精选的开路浮选流程,获得了K2O品位为6.57%、K2O回收率为62.83%,Rb2O品位为0.190%、Rb2O回收率为74.48%的长石精矿。     

回水中的微细粒矿物资源化利用

利用酸性工业废水,采用双反浮选方法对贵州某中低品位硅钙质磷矿进行浮选试验。考察磨矿细度、酸性废水用量、捕收剂用量对精矿P2O5品位和回收率的影响。结果表明,当磨矿细度-0.074mm76.8℅,利用酸性废水和新型脱硅捕收剂BY,可使原矿P2O5品位为25.75℅的硅钙质磷矿获得P2O5品位为31.29%,回收率为85.90%的磷精矿。既可降低生产成本,又可获得较好的浮选指标。     

新型铜抑制剂BK511用于某矿铜钼分离浮选的试验研究

采用新型抑制剂BK511,对强捕收剂黄药浮选的铜钼混合精矿进行铜钼分离浮选试验。试验采用两次铜钼分离粗选、钼粗精矿一次精选后再磨、再经五次精选工艺流程,获得钼精矿含钼45.31%,含铜1.14%,钼回收率89.94%的浮选指标。结果表明,BK511对采用强捕收剂黄药浮选的铜钼混合精矿中的铜矿物,具有较好的抑制作用。     

新型抑制剂BK511在某矿铜钼分离浮选中的试验研究

研究采用新型抑制剂BK511,对强捕收剂黄药浮选的铜钼混合精矿进行了铜钼分离浮选试验研究。试验采用两次铜钼分离粗选、钼粗精矿一次精选后再磨、再经五次精选工艺流程,获得了钼精矿含钼45.31%,含铜1.14%,钼回收率89.94%的浮选指标。试验结果表明,BK511对采用强捕收剂黄药浮选的铜钼混合精矿中的铜矿物,具有较好的抑制作用。     

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。