氰渣压滤机的反洗改造与生产实践

介绍了对氰化系统氰渣压滤机进行反洗改造和在实际生产中的应用情况,重点对反洗水量及反洗时间进行了分析和说明.     

新型电解铝生产管理系统

针对电解铝生产管理过程中存在的问题,开发一种新型管理系统,即上位计算机采用无线通信方式轮流给多台控制仪发送配料单,然后轮流接收各个控制仪的计量结果并进行统一管理.控制仪借助于格雷码编码器记忆每个电解槽的位置,避免手工输入槽号的繁琐和错误.实际应用表明,新型电解铝生产管理系统明显提高了生产效率和管理水平.     

矿山设备虚拟现实系统的实现

为了弥补现有CAD方法无法预知设计的设备是否适合某些工作环境的不足,缩短设计周期和减少设计费用,提出了实现矿山设备虚拟现实系统的基本过程和方法,为开发矿山设备虚拟现实系统提供了一种基本开发模式.结合实际情况,以一种破碎机为研究对象,使用MultiGen Creator转换并优化原有的三维CAD模型,最终生成VR数据模型,以Vega和Visual C 作为软件平台,实现了矿山设备虚拟现实系统.这一系统具有通用性和可移植性,适用于各种产品.     

采空区塌陷的离散元模拟

采矿区的稳定以及因塌陷而产生的地质灾害是人们目前急需解决的问题.采用离散元法对含不连续面岩体的采矿区进行了模拟计算,并以此来评价采空区的稳定,以及可能因塌陷而导致的地面影响范围,模拟计算结果与实际情况吻合较好,误差11.7%,这为以后进行类似的分析和评价提供了一种新的方法.     

山恋

巍峨的长白山,沃野千里。沿山脉西行有一座七顶山,山下坐落着一个村庄,风景秀丽。在北方姗姗来迟的春天里,满山的冰凌花顶着尚未消融的冰雪绽放,翠绿的山川透着芬芳,沁人心     

一切都在

<正>有好多天,一休和尚独坐参禅,默然不语。师父看出了其中的玄机,微笑着领他走出了寺门。寺外,一片大好的春光。放眼望去,天地间弥漫着清新的气息,还有半绿的草芽、飞翔的小鸟和静静流淌的小河……     

午夜 过客 人生

寂寞甚至厌恶的情绪充斥着整个灵魂,狠狠地捶了一下桌子,嘭!居然连随意发泄制造出来的声音也在这漆黑的午夜显得格外沉闷,真扫兴!呆呆地看着电脑屏幕上一闪一闪的提示符,连手指都无力抬起。看了看墙上的时钟,凌晨两点四十八分。电脑里放的是许美娴的《内疚》,歌中的伤感,害得我接二连三地抽了十来张的纸巾。想到曾经的我、现在的我,眼泪不知不觉已滑落到嘴角……     

BP神经网络预测在城市可持续发展中的应用

在综合分析影响乌鲁木齐城市可持续发展因子基础上,探讨了干旱区城市可持续发展因子变化趋势.利用乌鲁木齐市区气象观测站1951～2001年51年的降水、气温、相对湿度等长期连续气象观测资料及有关统计年鉴数据,采用Matlab、EXCEL、Erdas、Arcgis等软件进行数据分析处理,通过一般趋势分析、神经网络方法进行预测,得出了乌鲁木齐21年来的变化特征和未来的变化趋势.     

化学精炼提Ag在大冶有色公司的实践

大冶公司稀贵金属厂采用半湿法工艺处理铜电解阳极泥,对四种从氯化银中提取银的方法进行了比较研究,从直收率、质量等方面考虑,选择了水合肼还原法,银转化率>99%,银回收率>98.6%.     

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