铝土矿反浮选脱硅中BK5O1抑制剂的研制与应用

通过浮选试验,EDS、动电位和红外光谱测定,考察了BK501抑制剂在一水硬铝石与高岭石反浮选分离中的作用效果和机理.浮选试验表明,通过药量加大,一水硬铝石几乎全部被抑制,而高岭石则可出现轻微的活化作用.最终分选指标:不脱泥,将一水硬铝石:高岭石=2:1的人工混合矿反浮选,槽内产品Al203回收率77.59%,铝硅比10.74.脱泥后,槽内产品Al2O3回收率80.12%,铝硅比10.79.机理分析表明,药剂与一水硬铝石除氢键作用外,还出现了强烈的化学键合,对高岭石产生絮凝作用而显现活化上浮.     

铝土矿反浮选脱硅中BK501抑制剂的研制与应用

通过浮选试验，EDS、动电位和红外光谱测定，考察了BK501抑制剂在一水硬铝石与高岭石反浮选分离中的作用效果和机理。浮选试验表明，通过药量加大，一水硬铝石几乎全部被抑制，而高岭石则可出现轻微的活化作用。最终分选指标：不脱泥，将-水硬铝石：高岭石=2：1的人工混合矿反浮选，槽内产品Al2O3回收率77．59％，铝硅比10．74。脱泥后，槽内产品Al2O3回收率80．12％，铝硅比10．79。机理分析表明，药剂与-水硬铝石除氢键作用外．还出现了强烈的化学键合，对高岭石产生絮凝作用而显现活化上浮。     

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。     

高岭石与一水硬铝石反浮选分离药剂研究

针对我国铝土矿资源的实际情况,对一水硬铝石与主要脉石矿物高岭石的反浮选分离作了初步研究。研究了高岭石和一水硬铝石在十二胺体系中的浮游行为,从二者晶型结构差异入手,解释了高岭石用药量相对较大,以及在酸性条件下仍可大量上浮的原因。使用抑制剂YX-2,二者可浮性出现较大差异。最后配合使用分散剂YF-2,对一水硬铝石:高岭石为2:1的人工混合矿进行反浮选分离。经过一次粗选、一次精选,槽内产品实现回收率(以Al2O3计)75.03％,铝硅比10.66。     

捕收剂CTAB对一水硬铝石与高岭石的浮选差异及其分子动力学模拟

为了研究季铵盐类捕收剂对铝土矿反浮选的影响,以十二胺（DDA）为参照捕收剂,考察了十六烷基三甲基溴化铵（CTAB）对一水硬铝石和高岭石浮选回收率的影响,并通过FTIR分析、Zeta电位检测、吸 附量测定以及分子动力学模拟对作用机理进行了系统的分析。浮选试验结果表明,CTAB浮选分离效果优于DDA,在pH=4、CTAB浓度为2×10-4 mol/L时,纯矿物浮选试验一水硬铝石和高岭石浮选回收率相差51.70个百分 点,人工混合矿试验获得了Al2O3品位71.73%、回收率71.26%、SiO2含量9.43%的精矿,铝硅比A/S达到7.60。机理分析结果表明,捕收剂CTAB在一水硬铝石和高岭石表面均有吸附,在高岭石表面的吸附量大于在一水硬 铝石表面的吸附量,且均为物理吸附;分子动力学模拟计算结果表明捕收剂CTAB与高岭石总相互作用能为与一水硬铝石总相互作用能的2.29倍,因此CTAB分子优先吸附于高岭石的表面,具有较高的选择性,有利于反 浮选的进行。     

铝土矿浮选新型捕收剂的捕收性能及机理研究

通过一水硬铝石和高岭石的单矿物浮选试验、接触角、红外光谱、和ζ电位测量分析了东北大学研制的DJL-1和DJL-2捕收剂在铝土矿正浮选中的浮选行为和作用机理。一水硬铝石与DJL-1和DJL-2作用后接触角变大、疏水性变强;高岭石与DJL-1作用后接触角几乎不变,与DJL-2作用后接触角变大。DJL-1使一水硬铝石和高岭石表面ζ电位均负向增加,DJL-2对一水硬铝石和高岭石表面ζ电位影响较小,分别使用DJL-1和DJL-2,一水硬铝石和高岭石的最大回收率之差为54.5%和70.5%,DJL-2在更宽的温度和pH范围内获得更好的浮选结果;DJL-1和DJL-2在一水硬铝石表面存在键合吸附和氢键作用,DJL-1与高岭石表面存在氢键作用。结果表明,DJL-1和DJL-2均是铝土矿正浮选的优良捕收剂,且DJL-2更优。     

一水硬铝石与高岭石反浮选分离研究

详细研究了一水硬铝石和高岭石的浮选行为 ,并以十二胺盐酸盐作为捕收剂 ,在酸性介质 ( pH3 .5 )及中性介质 ( pH7.5 )加调整剂ATNO进行反浮选分离研究 ,得到较好的分离效果 ,精矿A/S >11。同时进行了不同粒级和不同A/S的一水硬铝石和高岭石的反浮选分离 ,结果表明 ,不同的A/S条件下 ,可以得到较好的分离效果 ,但粒级对一水硬铝石和高岭石的分离有较大的影响 ,细粒级一水硬铝石与高岭石分离效果不好 ,有待于进一步研究     

粒度对一水硬铝石和高岭石浮选分离的影响

研究了不同粒度一水硬铝石和高岭石的浮选行为,结果表明:油酸钠作捕收剂时,随着粒度的变细,一水硬铝石的上浮率变小,十二胺作捕收剂时,情况相反;高岭石的上浮率变化规律与一水硬铝石相反。人工混和矿试验表明:采用油酸钠和十二胺正、反浮选分离一水硬铝石和高岭石要尽量放粗两者的入选粒度,才能达到较好的分选效果。     

季铵盐捕收剂对铝硅矿物的浮选行为

通过单矿物浮选试验、动电位测定及红外光谱分析研究了十二烷基三甲基氯化铵、十六烷基三甲基溴化铵和十八烷基二甲基苄基氯化铵3种季铵盐捕收剂对铝硅矿物一水硬铝石、高岭石、叶蜡石和伊利石的浮选行为和作用机理.结果表明:在碱性条件下,以季铵盐为捕收剂可实现一水硬铝石与3种硅酸盐矿物的反浮选分离;一水硬铝石、高岭石、叶蜡石及伊利石的等电点分别为pH6.0、3.4、2.3、3.2,随着矿浆pH值提高,这些矿物的表面动电位均呈负增加;季铵盐捕收剂主要靠静电作用吸附在一水硬铝石、高岭石、叶蜡石及伊利石表面.     

QAX224捕收剂反浮选分离一水硬铝石和高岭石的试验研究

通过浮选试验、动电位和红外光谱测定,考察了以季铵盐QAX224为捕收剂,淀粉为抑制剂,一水硬铝石与高岭石反浮选分离的作用效果和机理。浮选试验表明, 在pH=8～9的范围内,随着抑制剂用量的增加,一水硬铝石几乎全部被抑制,而高岭石则可出现轻微的活化作用。将一水硬铝石和高岭石的人工混合矿反浮选试验后,铝硅比提高到30.79。机理分析表明,捕收剂和抑制剂与高龄石除了物理作用,还出现了化学键合,一水硬铝石与捕收剂主要为静电吸附,与淀粉主要是化学吸附。     

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。