黑龙江某晶质石墨风化样分选实验

黑龙江某石墨矿属于晶质石墨矿石,原矿固定碳含量9.3％.通过对该地区鳞片石墨矿进行选矿实验研究,得出适宜的浮选条件为:粗选磨矿细度为-75 μm 60％的条件下,煤油用量为52g/t,2#油用量为56g/t.进行一段粗选两段扫选、粗精矿五段再磨六段精选,中矿循序返回的闭路实验流程,最终获得产率9.19％,固定碳品位94...     

甘肃某细鳞片石墨矿选矿试验研究

甘肃某石墨矿属于鳞片石墨矿石,原矿固定碳含量较低,为4.48%,石墨鳞片较小。对该地区细鳞片石墨矿进行选矿试验研究,得出适宜的粗选条件为:粗磨磨矿细度为-0.074mm占63.52%、浮选浓度为27%、煤油用量为640g/t、2#油用量为110g/t、生石灰用量为2500g/t(即矿浆pH=9),粗精矿采用五次再磨六次精选流程进行开路试验、闭路试验,最终获得石墨精矿固定碳含量为95.70%,回收率为71.78%的选别指标,为该地区石墨资源的开发利用提供了技术依据。     

马达加斯加某大鳞片石墨矿选矿试验研究

为提高大鳞片石墨保护率,针对马达加斯加某大鳞片石墨矿进行了选矿试验研究。在磨矿介质为钢棒、磨矿质量分数为60%,-0.15mm含量为68.73%,浮选质量分数33%,生石灰用量2000 g/t,煤油用量160 g/t,2#油用量60 g/t的粗选条件下,采用"2段粗磨粗选、5段再磨8次精选、合格大鳞片石墨预先分级、中矿返回"的闭路流程,获得固定碳质量分数为90.21%、保护率为69.19%的+0.3 mm产品,以及固定碳质量分数为92.48%、保护率为73.01%的0.15~0.3 mm产品。     

抑制剂对块状隐晶质石墨浮选试验影响研究

对原矿进行化学成分分析和矿物组成分析,该石墨矿的脉石主要为石英和伊利石,选用水玻璃和羧甲基纤维素钠为浮选抑制剂。通过对块状隐晶质石墨浮选中抑制剂添加地点及两种抑制剂用量试验,探索在1次粗选1次精选实验中抑制剂的最佳添加位置和用量,并对水玻璃和羧甲基纤维素钠这两种抑制剂的抑制机理进行了讨论。结果表明,在精选段添加抑制剂的尾矿固定碳含量损失较小,而且能得到相对较高品位及回收率的精矿。精选作业中抑制剂水玻璃和羧甲基纤维素钠用量均为500 g/t时,精矿固定碳含量与回收率分别为83.84%和76.05%,所获精矿各项工艺指标最佳。     

黑龙江某低品位微细粒石墨矿提纯试验研究

黑龙江某低品位微细粒石墨矿原矿固定碳含量(质量分数)为6.01%,石墨嵌布粒度0.002～0.020 mm占85%。采用浮选和混酸法联合工艺进行提纯。粗选磨矿细度-0.045 mm质量分数为89%,复合改性柴油用量为280 g/t,2#油(松醇油)用量为150 g/t;粗精矿采用一磨两选工艺进行四段再磨八次精选,低品位中矿集中再磨再选,获得浮选精矿固定碳含量为94.94%,固定碳回收率为90.22%。浮选精矿混酸法提纯工艺为：一段提纯浆料质量分数40%,HF用量20%,HCl用量20%,反应温度70℃,反应时间6 h;二段提纯浆料质量分数40%,HCl用量40%,HNO₃用量5%,反应温度70℃,反应时间2 h。最终获得高纯石墨产品,固定碳含量为99.95%。     

东北某晶质石墨矿可选性初步研究

为了解东北某石墨矿选矿工艺特征及矿石可选性,对该晶质石墨矿进行了矿石性质、石墨粗选条件试验、石墨精选条件试验和闭路试验等一系列试验研究。研究结果表明:该石墨矿适宜一段粗磨、粗精矿九段再磨、10次精选、中矿分段集中返回的选矿流程,闭路试验获得的石墨精矿固定碳含量为94.52%,固定碳回收率为92.19%。试验研究为该石墨矿的选厂工艺参数优化提供了数据支持和技术指导,亦可为相似矿石性质的石墨矿石的可选性提供参考。     

吉林某地区含隐晶质难选石墨矿选矿试验研究

针对吉林地区某含难选微细粒隐晶质石墨矿进行选矿试验研究,在确定最佳粗选条件基础上,采用一次粗选、粗精矿七次再磨八次精选闭路流程,石墨原矿固定碳含量由11.51%提高至精矿固定碳85.21%,回收率为81.32%。     

黑龙江萝北某石墨矿石选矿试验

黑龙江萝北某鳞片状低品位石墨矿石矿物嵌布关系复杂,矿石硬度较大。为确定该资源的节能、高效开发利用方案,对有代表性矿石进行了选矿试验。结果表明,在粗磨磨矿细度为-0.074 mm占90.06%的情况下,以石灰（1 000 g/t）为黄铁矿抑制剂、煤油（460 g/t）为石墨捕收剂、2^#油（70 g/t）为起泡剂进行1次粗选,粗精矿经5阶段再磨再选（最后一次再磨产品为2次连续精选）,中矿1直接抛尾,中矿2、中矿3合并返回粗选,中矿4～中矿6返回与精矿1合并入再磨2的闭路流程处理该固定碳含量为13.12%的石墨矿石,可获得固定碳含量为97.50%、回收率为90.63%、-0.074 mm占76.70%的优质石墨精矿,达到 GB/T3518－1995中石墨精矿最高质量等级标准。     

萝北鳞片石墨选矿工艺流程试验研究

针对黑龙江萝北鳞片石墨矿物共生关系复杂的现状,选取具有代表性的矿石,结合矿石工艺矿物学研究,在破碎、磨矿、浮选等试验的基础上确定最佳选矿工艺流程。研究结果表明:在粗磨时间为3.5 min、煤油用量为250 g/t、仲辛醇用量为25 g/t的条件下,矿石采用一次粗选、一次扫选,粗精矿经四阶段再磨后五次精选,中矿1、中矿2、中矿3合并扫选后返回粗选,中矿4、中矿5、中矿6合并返回一段再磨的闭路选矿工艺流程,可获得精矿固定碳含量为95.92%、回收率为95.24%、尾矿品位为0.87%的优良工艺指标。试验所确定的最佳选矿工艺流程,可为该地区石墨选矿厂的工艺流程设计提供一定理论借鉴。     

内蒙古某低品位大鳞片石墨矿选矿试验研究

为更好开发利用低品位大鳞片石墨,针对内蒙古某低品位大鳞片石墨矿进行了选矿试验研究。在磨矿介质为棒磨、磨矿浓度60%、-0.15 mm 59.43%、浮选浓度23%、煤油105 g/t、2#油55 g/t、浮选时间3 min的粗选条件下,采用2段粗磨粗选、1段扫选、6段再磨7次精选、合格大鳞片石墨预先分级、中矿返回的闭路流程,获得固定碳为90.37%的+0.3 mm产品,固定碳含量为90.21%的-0.3+0.15 mm产品,+0.15 mm产品大鳞片综合保护率为74.36%。     

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。