提高磨矿设备生产能力的几种途径

测洲选矿厂是德兴铜矿主要选矿厂之一,建厂于1965年．当时处理能力为2500t／d．经过近40年的生产实践和扩建工程,已形成处理能力为3500t／d的生产规模,磨矿设备也朝着大型化和现代化方向发展。目前用于一段磨的磨矿设备有：3．2×3．1m球磨机8台,3．2×4．5m球磨机11台,3．2×6．0m球磨机2台,5．03×6．4m磨机1台;用于石灰磨矿的磨矿设备有2．1×3．0m球磨机8台,1．5×3．0m球磨机2台。现就球磨机在我厂的应用实践,对影响其生产能力的主要因素作一分析,以期对同类矿山起借鉴作用。1影响球磨机生产能力的主要因素1．1球磨机的规格…     

凤凰山铜矿碎磨系统的现状及改造

铜陵有色金属公司凤凰山铜矿矿石硬度大、碎矿产品粒度大 ,砾磨机破碎能力差 ,球磨机钢球偏小 ,冲击破碎能力也差。投产三十多年来 ,磨机处理能力从未达到设计要求 ,磨矿用电单耗极高。经现场考察、分析、计算 ,采取碎矿维持现状、砾磨—棒磨系统报停、加大球磨机钢球直径、增加钢球综合充填率和加快转速等改进办法 ,从而大幅度地提高了Φ3 .2m× 3 .1m格子球磨机的磨矿能力和能源利用率。其处理量由目前的 60 0～ 70 0t/d提高到 14 0 0t/d以上 ,磨矿用电单耗也由 2 0kWh/t下降到 7kWh/t以下 ,效果十分显著。     

乌奴格吐山铜钼矿SABC碎磨流程能耗分布规律的研究

针对乌奴格吐山SABC碎磨流程的特点及运行情况,统计分析了SABC碎磨流程中各主要设备的能耗数据.分析结果表明,在相同处理能力条件下,无顽石返回时,半自磨机的功率大于有顽石返回时的能耗,但球磨机功率基本不变;在处理能力720-750t/h条件下,无顽石返回时,半自磨机和球磨机的平均能耗分布比例为39.24％、53.11％,有顽石返回时,半自磨机、球磨机、破碎机的平均能耗分布比例为36.76％、53.01％、2.54％,而半自磨机与破碎机的平均能耗比例之和为39.30％,与无顽石返回时半自磨机的平均能耗分布比例基本相同;半自磨机和球磨机的运行不合理.     

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。     

MGQ型球磨机主轴瓦故障分析

针对 MGQ 2 70 0× 2 1 0 0球磨机主轴瓦巴氏合金材料的常见故障进行的分析 ,找出了发生故障的原因 ,制定相应措施 ,提高了球磨机作业率。     

立式辊磨机对菱镁矿磨矿及浮选效果的影响

立式辊磨机是一种集中碎、粉磨、快速烘干、高效选粉等工序为一体的高效节能环保型设备,具有结构 简单紧凑、工作可靠、流程简单、占地面积小等诸多优点。 针对丹东宽甸某菱镁矿,分别进行立式辊磨机与球磨机磨 矿—浮选试验,通过对比磨矿能耗、磨耗、磨矿产品粒度特性、矿浆中 Fe3+浓度等数据,并比较了药剂制度对闭路试验 精矿指标的差异。 结果表明:立式辊磨机磨矿的能耗仅为球磨机磨矿能耗的 17%左右,立式辊磨机的磨耗约为球磨 机磨耗的 6%左右,同时立式辊磨机磨矿产品中有利于浮选的中间粒级(0. 105~ 0. 045 mm 粒级)含量要比球磨机磨矿 高 2. 39 个百分点、立式辊磨机磨矿矿浆中的 Fe³⁺浓度也仅为球磨机磨矿矿浆的 17. 86%;通过闭路试验精矿指标对比 表明,使用立式辊磨机磨矿,可有效降低油酸钠与六偏磷酸钠用量,并降低精矿中 CaO 品位,提升精矿质量。     

半自磨机及球磨机衬板结构的改进

针对青海某金矿磨矿系统生产过程中半自磨机及球磨机衬板磨损严重,磨机负荷增加,导致磨矿效率下降、设备运转率低、加大了生产成本等问题,通过对半自磨机衬板磨损的分析,结构改造,升条高度由原设计的150、80 mm提高至170、100 mm,衬板平板部位厚度由原设计70 mm减薄至60 mm,衬板提升条采用非对称锥面设计方案;将溢流型球磨机筒体衬板单波峰设计改进为双波峰的设计结构,将原设计为两段分割结构的端衬板,改进为三段分割结构,提高了球磨机的磨矿能力。最终实现半自磨机和球磨机衬板使用寿命分别提高了1 500 h和2 200 h,生产能力提高了50%。磨矿系统电能能耗下降12. 34 (kW·h)/t、钢耗下降0. 3 kg/t。     

用球磨机湿式磨矿和干式磨矿时其能量效率和经济比较

球磨机因其结构不同而分管磨机、球磨机、多室磨机、圆锥球磨机、三锥式磨机、多室管磨机等。球磨机排矿分溢流式、格子式、圆周筛式和周边式。湿式磨矿比干式磨矿的破碎能力和能量效率都有增加。在干燥的物料中徐徐加水,则矿粒由于水的表面张力,与干燥时相比容易凝结,此时功指数显著增加。在连续生     

橡胶衬板在MQY2100×3600球磨机上的应用

安庆铜矿选矿车间共有 6台球磨机 ,其中格子型 3台 ,溢流型 3台。矿山自 1 991年投产以来 ,所有球磨机使用的衬板都是ＺＧＭｎ1 3衬板 ,在生产过程中 ,多次发生衬板螺钉磨断、衬板脱落以及螺孔漏砂等现象 ,更有甚者 ,筒体内壁受运动着的矿浆流体的冲刷 ,导致筒体磨损严重。ＭＱＹ2 1 0 0× 36 0 0球磨机于 1 996年 3月就由于筒体磨损严重而被迫对筒体进行堆焊 3天 ,然后在内壁上贴皮带处理的事件。针对以上问题 ,根据有关资料介绍的橡胶衬板具有耐磨损、重量轻等特点 ,在选矿ＭＱＹ2 1 0 0× 36 0 0球磨机上于 1 998年 1 2月使用了海南司克…     

某选矿厂MQY5064球磨机磨矿产能优化研究

介绍了某铜矿选矿厂采用的MQY5064湿式溢流型球磨机近年来的运行情况,分析了投产初期球磨机未达产的主要原因是入磨粒度未达到设计要求,通过调整入磨粒度、钢球充填率、旋流器分级效率、磨机圆筒筛、磨矿介质等,有效提高了该磨机的处理能力,达到了设计要求。     

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