给矿粒度分布对半自磨-球磨回路磨机选型的影响研究

采用在JKSim Met软件平台上的流程模拟方法研究给矿粒度分布对年处理550万t某铁矿矿石的半自磨—球磨回路磨机选型的影响。研究结果表明,减小给矿粒度可显著降低所需半自磨机和球磨机的尺寸及驱动功率,从而降低磨矿回路的投资和运行成本。     

粒度小于13.2 mm矿石颗粒的冲击粉碎试验研究

JK落重试验是测定矿石粉碎特性参数的一种方法。标准落重试验的试样粒度范围为-63.0+13.2 mm。在利用JKSim Met软件进行自磨/半自磨粉碎模拟时,由此试验获得的矿石特性参数被默认地运用于所有粒度颗粒的粉碎。以华东某金矿矿石为对象,进行了粒度小于13.2 mm矿石颗粒的冲击粉碎试验研究。结果表明,此矿石物料的粉碎存在粒度效应,随着粒度的减小,颗粒抵抗冲击粉碎的能力增大。另外还发现,试料制备时的破碎次数对颗粒的粉碎效果也有影响。     

基于JKSimMet仿真数据的破碎机和半自磨机破碎粒度分布研究

矿山破碎设备的产品粒度是衡量其生产工艺性能的重要指标,目前主要采用离线人工筛分的方法进行判定。由于操作人员及筛分设备的不同,使得筛分结果参差不齐,现有经验公式与实际测量结果难以有效拟合,影响了对该参数的有效判定。通过利用JKSim Met仿真软件获得大量的粒度分布数据,在此基础上通过经验回归,获得了破碎产品粒度的分布公式,更好地拟合了粒度分布情况,可提高检测效率和控制精度。     

SCSE——表征矿石半自磨可磨度的新指标

JK落重试验及SMC试验作为测定矿石粉碎特性的试验方法在半自磨机选型和工艺条件优化中得到越来越多的应用。由JK落重试验或SMC试验获得的物料特性参数A和b是一种建立在特定粉碎数学模型基础之上的模型参数,这两个参数本身没有明确的物理意义,尽管其乘积A×b可作为衡量矿石抵抗冲击粉碎能力的一个指标,但A×b取值大小的工艺意义只有通过模型计算结果才能体现出来。为弥补这方面的不足,JKTech公司和SMCT公司新近联合推出了一种表征矿石半自磨可磨度的新指标——SCSE值。在综述JK落重试验、SMC试验以及利用JKSim Met软件进行半自磨磨矿流程模拟的方法和原理的基础上,介绍了这个新指标的定义、意义及局限性。     

立式磨流场结构对过粉现象的影响

立式磨的过粉现象是影响立式磨效率的一个重要因素。采用Solid Works软件对立式磨进行建模,并用ANSYS软件对立式磨的过粉现象进行了分析和研究。在此基础上通过加螺旋叶片的方法,对立式磨的流场结构进行了改进,大大降低了过粉现象。通过对比不同节距值的螺旋叶片,确定了当节距值为10 m时,过粉现象显著降低,且立式磨的粉体输运效果也得到明显改进。     

基于离散元的立式辊磨机粉磨性能研究

为提升立式辊磨机粉磨性能,在分析得出辊盘配合形式、磨辊个数、转速为粉磨性能主要影响因素后,以颗粒黏结建模思想构建物料模型,将黏结键断裂数作为评价指标,基于离散元软件EDEM进行单因素实验与正交实验。运用MATLAB做回归分析,建立黏结键断裂数与磨辊个数和转速的函数关系模型与响应曲面图,然后将正交试验得出的最优方案代入计算,最后通过仿真验证最优方案的粉磨效率。结果表明:立式辊磨机的粉磨效率受辊盘配合形式的影响,且随着磨辊数与转速的增大而提升,仿真试验也验证了最佳方案的可行性,为立式辊磨机的设计提供了参考。     

预粉磨在铁矿山的应用

介绍了预粉磨工艺流程和主要粉磨设备在铁矿山的应用 ,并进行了比较 ,实践证明广义磨是一种可以在铁矿山中广泛推广应用的预粉磨设备     

预粉磨在铁矿山的应用

介绍了预粉磨工艺流程和主要粉磨设备在铁矿山的应用，并进行了比较，实践证明广义磨是一种可以在铁矿山中广泛推广应用的预粉磨设备。     

辊筒磨节能特性的探讨

众所周知，粉磨是水泥工业电耗的主要环节。升发新的粉磨设备，提高粉磨效率，一直是世界各国粉磨工作者所关注的大问题。以传统的球磨机为主的粉磨作业耗电量约占水泥厂总耗电量的65％～76％，能耗高，物料在磨内的停留时间长、噪声大。     

转速和搅拌盘结构对卧式搅拌磨粉磨效率的影响

以?230 mm×338 mm卧式搅拌磨为研究对象,采用EDEM软件对不同转速、不同搅拌盘结构型式的搅拌磨粉磨效率进行了研究。根据仿真结果和试验验证得出:相同转速下,梯形齿盘的卧式搅拌磨的粉磨效率明显高于锯齿形盘和普通圆盘;相同结构的搅拌盘,其粉磨效率并不会随着转速的提高而持续提高,并对仿真结果进行了验证分析。     

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     

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     

2014 second batch of rare earth quota released

正~~