高压辊磨机挤满给料控制系统开发与应用

为了提高高压辊磨机的设备利用效率,减少空转率,本文提出了一套完整的高压辊磨机给矿控制策略。该控制策略以挤满给料专家控制算法为核心,加之对整个高压辊磨机作业回路进行故障监测与诊断,保证了高压辊磨机给料的持续和稳定性,提高了作业回路的生产效率和安全性。     

研山铁矿高压辊磨机工艺参数优化试验

司家营研山铁矿引进高压辊磨机后,其产品指标一直未达到设计要求,为此,对高压辊磨机进行了工业试验,结果表明：在高压辊磨机工作压力为12.5 MPa、边料返回量为70%、辊面线速度为1.78 m/s、给料粒度为+12-40 mm时高压辊磨机破碎效果最佳。     

高压辊磨机给料系统的改造与应用

重钢西昌矿业有限公司选矿厂的GM150/80型金属矿用高压辊磨机已运行了2000多h。筛下矿物经辊磨机辊压破碎,以矿饼形式排出,打散后6mm以下的矿物达70%左右,磨碎效果良好。笔者对该高压辊磨机的给料系统做一介绍和探讨。     

高压辊磨机工艺因素的研究

高压辊磨机自问世以来,引起粉碎界的高度关注,它不仅有助于实现多碎少磨,而且随着产品细度的降低,很可能成为以碎代磨的新型粉碎设备。笔者利用φ200mm×50mm实验室型高压辊磨机,对其工艺因素进行了较系统的研究,分析了高压辊磨机的压力、转速、给料粒度和组成、含水率等工艺因素与粉碎能耗、粉碎概率等粉碎指标的关系,对于研制和设计高压辊磨机,生产运用高压辊磨机有着理论的和实践的意义。     

高压辊磨机用于顽石破碎作业的工艺研究

在自磨/半自磨工艺流程中,圆锥破碎机作为自磨机顽石处理设备,在作业率和处理量上难以与大型自磨机相匹配,造成自磨机回路系统难以达到稳定平衡,并限制了产能提升。针对自磨机和顽石破碎机的工艺特点,结合SINO铁矿自磨生产实践及实验室试验,重点研究了自磨机回路中,使用高压辊磨机进行顽石破碎作业的工艺可行性。     

高压辊磨机粉碎数学建模和计算机模拟研究进展

介绍高压辊磨机粉碎数学模型的研究进展,以及应用粉碎数学模型通过计算机模拟计算进行工业型高压辊磨机粉碎效果预测、粉碎回路流程设计和工艺条件优化的研究进展。     

高压辊磨机在金堆城钼矿的应用试验

介绍了高压辊磨机的工作原理、国内外的发展状况以及高压辊磨机在金堆城钼矿的半工业试验情况。结果表明应用高压辊磨机对金堆城钼矿石进行超细碎处理,作业效果很好,高压辊磨机的引进将给选厂的节能降耗带来巨大的发展潜力。     

高压辊磨机在金堆城钼矿的应用试验

介绍了高压辊磨机的工作原理、国内外的发展状况以及高压辊磨机在金堆城钼矿的半工业试验情况。结果表明应用高压辊磨机对金堆城钼矿石进行超细碎处理,作业效果很好,高压辊磨机的引进将给选厂的节能降耗带来巨大的发展潜力。     

高压辊磨机在金堆城钼矿的应用试验高压辊磨机在金堆城钼矿的应用试验

介绍了高压辊磨机的工作原理、国内外的发展状况以及高压辊磨机在金堆城钼矿的半工业试验情况。结果表明应用高压辊磨机对金堆城钼矿石进行超细碎处理,作业效果很好,高压辊磨机的引进将给选厂的节能降耗带来巨大的发展潜力。     

某钒钛磁铁矿高压辊磨碎矿试验

利用中钢集团安徽天源科技股份有限公司自主研发的1 000 mm×260 mm型高压辊磨机,对某钒钛磁铁矿进行了高压辊磨试验研究。试验结果表明:高压辊磨机能大幅度降低产品粒度,显著提高磨矿效率,并为高压辊磨机在大型铁矿石选矿厂应用提供了可行性依据。     

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     

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     

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     

唐口煤矿深部复杂开采工作面瓦斯分源涌出规律研究

研究工作面瓦斯涌出规律对工作面瓦斯治理有重要意义。为了得到唐口煤矿深部3号煤层复杂开采条件下工作面回采时期瓦斯涌出时空演化规律,选取6304工作面作为对象,采用实测方法研究6304工作面瓦斯涌出规律。结果表明:6304工作面瓦斯涌出量为6.534 m³/min,其中煤壁占34.27%,落煤占29.62%,采空区占36.11%;沿工作面倾向由低到高,瓦斯浓度整体为上升趋势,其中1—76号架工作面瓦斯浓度小于0.20%,76—102号架瓦斯浓度上升明显,最大为0.387%;上隅角的后部采空区是工作面的瓦斯主要涌出源,上隅角1号测点瓦斯浓度0.78%,上隅角周边3号、5号、7号、8号、9号测点瓦斯浓度平均为0.643%;周期来压时,上隅角瓦斯相对平时较高。研究为针对性的瓦斯分源监控与灾害防治提供基础。