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1.
磁黄铁矿与乙硫氮相互作用电化学浮选红外光谱的研究   总被引:1,自引:0,他引:1  
考察了乙硫氮为捕收剂时磁黄铁矿的浮选行为,发现在pH2-12的范围内,磁黄铁矿均可表现良好的可浮性。只有pH>12时,可浮性下降。通过用氧化剂过硫酸铵、还原剂硫代硫酸钠调节矿浆电位, 考察了磁黄铁矿在不同pH值下,可浮性与矿浆电位之关系,得出了矿物可浮电位-pH区间。通过红外光谱测试技术的研究,探讨了乙硫氮在磁黄铁矿表面作用机理及生成产物,不同pH值下与乙硫氮作用后,磁黄铁矿浮选回收率与乙硫氮红外吸收强度有对应关系,乙硫氮的二硫化物秋兰姆是主要吸附产物。  相似文献   

2.
考查了乙黄药为捕收剂时,磁黄铁矿、脆硫锑铅矿和铁闪锌矿的浮选行为,发现在pH2~12的范围内,磁黄铁矿和脆硫锑铅矿均表现出良好的可浮性,只有pH>12时,可浮性下降。铁闪锌矿只有在酸性条件下才有较好的可浮性,当pH>5以后,浮选回收率急剧下降而不可浮。并采用氧化剂过硫酸铵、还原剂硫代硫酸钠调节矿浆电位,考查了磁黄铁矿、脆硫锑铅矿和铁闪锌矿在不同pH值下,可浮性与矿浆电位的关系,得出了矿物可浮的电位-pH区间。研究表明,三种硫化矿存在可分离电位区间。  相似文献   

3.
丙三醇黄原酸钠抑制磁黄铁矿作用机理研究   总被引:2,自引:0,他引:2  
通过测定pH值、矿浆电位以及红外光谱,探讨了丙三醇黄原酸钠抑制磁黄铁矿的作用机理.在丙三醇黄原酸钠作用下,磁黄铁矿表面存在亲矿的-C=S吸收峰和亲水的-OH吸收峰,抑制了磁黄铁矿的上浮;磁黄铁矿的可浮性与pH值和矿浆电位存在着匹配关系,在某一pH值下,只有在适宜的电位区域磁黄铁矿才可浮.  相似文献   

4.
张芹  徐兢  王昌安  陈铁军 《矿业快报》2005,21(10):10-12
考查了丁铵黑药为捕收剂时, 磁黄铁矿、脆硫锑铅矿和铁闪锌矿的浮选行为.发现磁黄铁矿和脆硫锑铅矿在pH<10范围内均有较好的可浮性,当pH>10后,回收率开始下降.铁闪锌矿只有在酸性条件下才可有很好的可浮性,当pH>5以后,浮选回收率急剧下降而不可浮.通过用氧化剂过硫酸铵,还原剂硫代硫酸钠调节矿浆电位,考查了磁黄铁矿、脆硫锑铅矿和铁闪锌矿在不同pH值下,可浮性与矿浆电位的关系,得出了矿物可浮的电位-pH区间.研究表明,三种硫化矿存在可分离电位区间.  相似文献   

5.
考查了乙硫氮为捕收剂时,磁黄铁矿、脆硫锑铅矿和铁闪锌矿的浮选行为,发现在pH2~12的范围内,磁黄铁矿具有良好的可浮性,当pH>12时,可浮性下降。而脆硫锑铅矿在整个pH范围内,均具有很好的可浮性。铁闪锌矿只有在酸性条件下才有较好的可浮性,当pH>5以后,浮选回收率急剧下降而不可浮。并采用氧化剂过硫酸铵、还原剂硫代硫酸钠调节矿浆电位,考查了磁黄铁矿、脆硫锑铅矿和铁闪锌矿在不同pH值下可浮性与矿浆电位的关系,得出了矿物可浮的电位-pH区间。研究表明,磁黄铁矿和脆硫锑铅矿可分离电位区间很窄。  相似文献   

6.
研究了以乙硫氮为捕收剂时,方铅矿、闪锌矿和单斜磁黄铁矿这3种单矿物在不同矿浆pH值及不同矿浆电位下的浮选行为。结果表明:方铅矿在整个试验pH范围内的可浮性均很好,单斜磁黄铁矿在低pH值下的可浮性差,闪锌矿的可浮性随着pH值的增大而急剧减弱;矿浆电位对单斜磁黄铁矿的浮选行为影响不大,方铅矿在矿浆电位升高时可浮性变差,闪锌矿在矿浆电位降低时可浮性变差。  相似文献   

7.
考察了乙基黄药为捕收剂时,脆硫锑铅矿的浮选行为,发现在pH2 ̄12的范围内,脆硫锑铅矿均可表现良好的可浮性,只有pH>12时,可浮性下降。通过用氧化剂过硫酸铵、还原剂硫代硫酸钠调节矿浆电位,考察了脆硫锑铅矿在不同pH值下,可浮性与矿浆电位的关系,得出了矿物可浮的电位-pH区间。并通过红外光谱测试的研究,探讨了乙基黄药在脆硫锑铅矿表面作用机理及生成产物,不同pH值及不同电位下与乙基黄药作用后,脆硫锑铅矿浮选回收率与红外吸收强度有一定的对应关系,在弱酸性范围,红外信号最强。乙基黄药在脆硫锑铅矿表面作用主要生成物为黄原酸铅。  相似文献   

8.
针对磁黄铁矿易氧化且氧化后可浮性差、难以通过浮选将其与其他矿物分离的问题,通过单矿物浮选试验、接触角测量、Zeta电位测定以及红外光谱测试等方法研究了酸预处理对不同氧化程度六方晶系磁黄铁矿浮选行为的影响及作用机理。结果表明,六方晶系磁黄铁矿氧化程度越深,其可浮性越差; 通过酸预处理可以明显提高六方晶系磁黄铁矿可浮性,且酸预处理pH值越低,酸预处理后六方晶系磁黄铁矿可浮性越好; 酸预处理后的六方晶系磁黄铁矿接触角明显增大,疏水性得到提高,零电点向负方向偏移,表面带正电的氧化产物发生脱附; 红外光谱测试结果表明,丁基黄药与六方晶系磁黄铁矿发生化学吸附同时生成双黄药。  相似文献   

9.
研究了乙黄药、乙硫氮和丁胺黑药分别为捕收剂时,脆硫锑铅矿的电化学浮选行为。结果表明,脆硫锑铅矿在3种捕收剂体系中虽然浮选行为不尽相同,但均表现了较好的可浮性。脆硫锑铅矿的浮选行为依赖矿浆电位。矿浆电位调节所用药剂为过硫酸铵((NH4)2S2O8))和硫代硫酸钠((Na2S2O4))。考查了脆硫锑铅矿在不同pH值下,其可浮性与矿浆电位之关系,得出了脆硫锑铅矿的可浮电位-pH区间,为大厂矿区复杂硫化矿电位控制分选提供了理论依据。  相似文献   

10.
通过丁基铵黑药药剂用量及矿浆pH对未活化和活化单斜磁黄铁矿浮选试验,以及单斜磁黄铁矿表面ζ电位及红外光谱测定,研究丁基铵黑药体系下,单斜磁黄铁矿的浮选行为及其表面吸附机理。结果表明,单斜磁黄铁矿在弱酸性及中性条件下可浮性最好,Cu~(2+)对其有一定的活化效果。丁基铵黑药在单斜磁黄铁矿表面为化学吸附,其表面生成正二丁基二磷酸亚铁。  相似文献   

11.
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  相似文献   

12.
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  相似文献   

13.
<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  相似文献   

14.
<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  相似文献   

15.
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  相似文献   

16.
文奇 《中州煤炭》2018,(6):175-178
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。  相似文献   

17.
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  相似文献   

18.
<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  相似文献   

19.
<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why  相似文献   

20.
正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.  相似文献   

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