φ3.2×4.5m琼磨机的改进

德兴铜矿二期工程设计能力为２万ｔ／ｄ。磨矿系统由９台设计能力为７０ｔ／ｈ的４３．２×４．５ｍ格子型球磨机种１台由加拿大ＡＣ公司产的设计能力为２２０ｔ／ｈ的溢流型球磨机组成。其中φ３．２×４．５ｍ球磨机的总生产能力占磨矿系统生产能力的７４％。但是由于设计和安装等多方面的原因,在生产维修与实践中,发现了许多问题。对这些问题总结、分析并改进,可对今后磨机设计制造及使用维修起到借鉴作用。１筒体衬板的改进球磨机筒体村板不仅能保护筒体,延长其使用寿命,还可以利用衬板表面的形状来控制钢球在简体内的运动轨迹。衬…     

烧结矿添加硼-镁复合添加剂工业试验

在磁铁矿精矿粉的烧结配料中加入硼－镁复合添加剂,可显著提高烧结生产效率及烧结矿的质量。经２４ｍ ２ 烧结机烧结及１８０ｍ ３ 高炉冶炼工业试验表明：采用复合添加剂技术及相应工艺后,烧结机利用系数由１．５６５ｔ／ｍ ２·ｈ提高到２．０９３ｔ／ｍ ２ ·ｈ;燃料消耗由９２．３５ｋｇ／ｔ降低到５４．０４ｋｇ／ｔ;高炉利用系数由２．３１５ｔ／ｍ ３·ｄ 提高到２．９５５ｔ／ｍ ３·ｄ;入炉焦比由６３０．４３ｋｇ／ｔ降低到５１９．６９ｋｇ／ｔ。     

搅拌磨机在弓长岭选矿厂细磨作业中的应用

针对弓长岭选矿厂再磨球磨机磨矿效率低、能耗大等问题开展了陶瓷球专用搅拌磨机代替球磨机的工业试验。试验结果表明,搅拌磨机磨矿粒度更细,排矿中-0043 mm含量比球磨机提高721个百分点;磨机电耗成本下降5026%,介质球添加量下降936%,介质成本下降5561%;单系列搅拌磨机比球磨机年节省磨矿成本18021万元。搅拌磨机磨矿效率较球磨机大幅提高,磨机利用系数从0465 1 t/（h·m3）提高到1042 3 t/（h·m3）,搅拌磨机与球磨机相比具有明显的经济效益。     

球磨机充填率与磨矿能力的关系

对铜山矿φ ３．２ × ３．１ｍ格子型球磨机动态钢球综合充填率３５％、4２％和５０％状况下，钢球的运动轨迹。抛落量、落下冲砸速度及运转负荷等进行物理及数学分析计算。论证了磨矿能力随钢球综合充填率的增加而大幅度提高，负荷在额定钢球综合充填率４５％（相当于动态钢球综合充填率的４２％）状况下为最大，超过４５％负荷反而下降。若对磨机加快转速和进出料装置进行改进，钢球综合充填率到最佳，使冲击合力矩负荷为０，甚至转变成动力，将大幅度提高磨机生产能力，节电降耗。     

细粒金的高强调和和载体浮选

智利和巴西以实验室试验规模,在保持紊流程度不变,改变输入矿浆能量的情况下,研究了高强调和（ＨＩＣ）对金的载体浮选的影响。矿浆经高强度调和后;获得了最佳结果,金回收率提高２４％,精矿品位提高５０％,浮选速率至少快３～４倍。在较低切变能量（０．５～２ｋＷ·ｈ／ｍ３矿浆）时,细粒较好地粘附于粗粒（金矿或黄铁矿）表面上,而在２～３ｋＷ·ｈ／ｍ３矿浆之间,由于剪切力作用于接触表面,细粒从粗粒表面脱除。在３～４ｋＷ·ｈ／ｍ３矿浆时,细粒自身聚结,产生更可浮的形态,而在４ｋＷ·ｈ／ｍ３矿浆时,粒间摩擦又起作用…     

新型高铬多元合金高性能耐磨铸造磨球的磨矿生产实践

新型高铬多元合金高性能耐磨铸造磨球的磨矿生产实践河北赤城后沟金矿刘金贵１前言河北省后沟金矿选矿厂目前的处理能力为４１５ｔ／ｄ，由５０ｔ／ｄ炭浆厂和３００ｔ／ｄ浮选厂组成，采用两段闭路磨矿流程。磨矿介质原为白口铸铁球，球耗一段为３．０ｋｇ／ｔ，二段为１...     

高压辊磨机和常规磨矿的比较

本文描述了在ＶＴＴ的新半工业试验厂进行的对比研究。该试验厂属于芬兰奥托昆普公司。试验矿石为铬铁矿。矿石在棒磨、球磨和高压辊磨机－球磨回路中进行磨矿，处理量０．５－３．０ｔ／ｈ。讨论了主要的磨矿特性，从矿物学观点对产品质量进行了比较。也讨论了利用高压辊磨机碎麻对铬铁矿选矿带来的效益。     

西林铅锌矿磨机给矿控制系统的研究

基于西林铅锌矿磨矿过程提出了磨机负荷给矿控制策略，并研制了由光／电、数／模转换装置，磨机负荷检测仪，ＫＭＭ可编程序调节器及变频调速器（ＶＶＶＦ）组成的磨机负荷给矿控制系统。该系统有３种运行方式，即负荷给矿、恒定给矿和手动给矿。本文详细论述了光／电、数／模转换装置的硬件结构、工作原理以及该系统的构成、控制原理．     

磨矿回路中的旋流器控制

本文介绍了磨矿回路中旋流器新的控制概念。随着磨机给矿硬度增大．磨机排矿粒度将变粗，磨机的循环负荷提高，旋流器的给料固体浓度增大，此时旋流器需要控制系统。应用体积流量分配控制可使旋流器修正分离效率曲线稳定。应用这种先进的控制系统，磨矿回路可在循环负荷为150％-620％广阔的范围内运行。高浓度的旋流器沉砂可使循环负荷最小，并且不发生过磨现象。     

城郊矿井地表沉陷的预测和影响分析

城郊矿井位于永夏矿区中部，井田面积１０３ｋｍ２。矿井可采储量４０２３Ｍｔ，工程规模２４Ｍｔ／ａ，可采煤层特征（表１）。表１可采煤层特征ｍ煤层二２三１三２２三４煤可采厚度０．８０～７．６８０．８０～２．０３０．８０～２．８００．８１～３．５５平均厚...     

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     

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     

2014 second batch of rare earth quota released

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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