优化磨矿分级系统负荷的探讨

在生产实践中,选矿厂磨矿系统经过多项技术创新后,处理量由3000t/d增加到4500t/d,同时导致二段磨矿环节负荷由0.78t/m3·h增加到0.85t/m3·h,三段磨矿环节负荷仅为0.72t/m3·h,基于流程考察、现场分析和优化计算,通过调整分级设备的工艺和结构参数,使二段磨矿负荷减少0.05t/m3·h,三段磨矿负荷增加为0.75t/m3·h,相对平衡合理。     

磨矿分级作业提效降耗技术改造与应用实践

影响磨矿效率和磨矿能耗的因素较多。磨矿分级效果如何，直接影响到选别指标。南京栖霞山铅锌矿针对磨矿分级存在的设备老、能耗高、效率低等问题，在磨机大型化应用, 磨矿自动控制、橡胶衬板与磁性衬板合理匹配等方面不断探索实践，彻底改变了磨矿、分级效率。使溢流细度-74 μm含量由73.28﹪提高到 80.65﹪；球磨效率提高了0.16 t/（m3·h）；分级效率提高16.9个百分点，降低了磨矿作业综合能耗2.2 kw.h/t，取得了显著成效。     

尖山铁矿一段磨矿分级系统设备的改造

针对尖山铁矿选矿分厂一段磨矿分级系统因处理量超出设计能力而引起的设备故障频发问题 ,对球磨机润滑系统、格子板、进料衬套密封及分级机大轴进行了改造。改造后使设备故障率大大降低 ,球磨机利用系数达到 4 .0 8t/ (m3 ·h) ,居国内领先水平。     

某铅锌矿磨矿分级循环系统降比提效试验研究

针对国内某铅锌选矿厂磨矿分级循环系统的循环负荷高、水力旋流器分级效率和球磨机磨矿效率低等问题,对现场磨矿分级系统进行流程考察和问题诊断,对试验样进行了岩矿性质测定和工艺矿物学研究,基于矿石碎磨特性开展了球磨机磨矿介质尺寸和级配的理论计算、实验室磨矿对比试验、工业应用试验。球磨机介质级配优化后,磨矿分级系统中-0.074mm粒级的返砂比由试验前的467.19%降至224.66%,分级量效率由试验前的52.26%提高至68.34%,分级质效率由试验前的46.72%提高至57.21%,磨机-200目利用系数由0.24t/(m3·h)提高至0.40t/(m3·h),磨机磨碎+0.15mm粗粒级效率由21.95%提高至38.09%,实现了磨矿分级系统中球磨机和分级机效率双提升。     

闭路湿磨中斜窄流分级设备研发与应用

介绍了闭路湿磨分级工艺中采用斜窄流分级斗 ,运用浅层沉降原理及斜窄流道的边壁剪切效应 ,缩短沉降距离以提高单位占地面积产能和改善矿浆的分散作用和分级效率 ,运用窄小的溢出面积使细粒及时溢出以提高分离精度和分级质效率的研究成果。该机已在某选厂生产使用中 ,用于闭路磨矿按 43 μm粒度分级 ,单位占地面积产能 7.5 1m3 / (m2 ·h)或 2 .91t/ (m2 ·h) ,分级质效率 5 9.89% ,底流浓度 5 8.8% ,溢流浓度 18.7% ,成功替代12 5mm水力旋流器。     

JKSimMet模拟软件在某金矿磨矿分级系统多目标协同优化中的应用

为了实现某金矿选厂的提产增效和节能降耗,采用JKSimMet模拟软件对该金矿的磨矿分级系统进行了多目标协同优化。采取的优化措施包括降低磨矿分级系统给矿粒度,调整球磨机和旋流器的关键工艺参数和增加粗磨旋流器底流给入再磨球磨机的比例。JKSimMet模拟结果显示,优化后磨矿分级系统的处理能力由35 t/h提升至44 t/h;粗磨比能耗从11.09 kWh/t降低至9.94 kWh/t,中矿再磨比能耗从9.93 kWh/t降低至7.23 kWh/t;粗磨产品细度P₈₀从86 μm减小至80 μm。通过对整个磨矿分级系统各工艺参数的协同优化,增加了磨矿分级系统的处理能力,降低了磨矿比能耗,并且提高了磨矿产品的质量,达到了多目标优化的目的。      

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…     

MVS振网筛在本钢铁精矿提铁降硅工艺中的应用

介绍了MVS电磁振动高频振网筛的结构特点及工作原理。经歪头山、南芬 2个选厂使用表明 ,平均处理能力分别高达 2 1.4 6t/ (台·h)和 2 0 .12t/ (台·h) ,平均品位分别提高 2 89和 2 81个百分点 ,平均筛分质效率分别达 39 6 7%和 4 4 78%。能有效控制好精选入选粒度 ,减少球磨机再磨负荷及过磨现象 ,提高了磨矿效率     

高频电磁场在含金硫化矿磨矿中的应用

本文研究了在含金硫化矿磨矿中采用高频电磁场能量的可能性。试验表明 ,采用高频电磁场的能量消耗大约为 2kW·h/t ,这可以大幅度地降低磨矿能耗 ( 2 0 %～ 3 0 %) ,减小磨机的磨损 ,并且提高了有用颗粒单体解离度一倍     

司家营选矿厂一段磨矿分级技术改造效果分析

司家营铁矿选矿厂氧化矿系统采用FX840-GX-P型平底旋流器代替2FLG-3000mm型双螺旋分级机后,磨矿分级效率大幅提高,且一次分级溢流粒度在一定程度上变细。磨矿效率由改造前的0.99t/(m3·h)提高到改造后的1.35t/(m3·h),-0.074mm粒级产量每小时增加16.81t。一段旋流器给矿泵的过流件寿命也由改造前的4个月增加到改造后的5个月。     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<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     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

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.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.     

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