煤质化验过程中误差的产生及控制

为了提高煤质化验过程中的准确度,保证煤炭质量,本文对煤质化验工作的内容以及煤炭检验过程中误差产生的原因进行了分析,提出了与之相应的误差控制措施。煤炭检验中需要避免采样误差、制样误差、干燥误差、分析误差以及人为误差的出现。高精度的煤炭检验工作能够为煤炭生产、经营提供合法有效的检验数据。     

选煤厂煤质检验工作中的误差及规避对策思考

煤质检验直接影响着煤炭的质量,由于煤样的不均匀性,煤质检验结果不可避免地存在误差。在一般选煤厂煤质检验中,主要存在偶然性误差、过程误差与过失误差,而这些误差都存在不可避免性。文章分析了误差产生的原因,提出一些可行性的措施,希望能够规避煤质检验过程中存在的问题,并为煤质检验的误差规避提供一些有用的经验。     

煤炭检验的误差及应对策略分析

文章以煤炭检验技术方式为切入点,重点阐述煤炭检验工作中误差的形成原因。在煤炭检验工作中,存在各类影响因素,会对检验结果的准确性造成影响。基于此,文章首先阐述煤炭检验工作的重要作用,其次深入分析当前煤炭检验误差问题,例如采样、制备、检测以及环境等因素,当以上环节存在问题时,便会影响到煤炭检验工作的准确程度。最后从多方面入手,根据误差形成原因提出针对性的优化措施。     

探讨煤质化验中误差分析及控制方法

煤质化验结果表征着煤炭的质量,决定着煤炭的生产、销售和使用。在化验过程中受多种因素影响会出现误差。本文分析了煤质化验采样、制样、干燥、分析等过程中可能出现的误差,制定了相应的误差控制方法。     

煤质精准分析方法研究及应用

煤是我国工业生产中的重要原料和能源物质,但是煤的性质和成分各不相同,为了有效、迅速而准确的控制煤炭加工产品的品质,就要进行煤质分析,通过对煤质的不同需求来进行不同侧重点的检验.其中最重要的就是对煤质检验的数据精准度把握.因此,就要对煤炭化验的准确性进行有效研究:明白为何要进行煤质分析;分析煤质分析中产生的误差,其中随机...     

煤质分析与检查对选煤厂设计及加工的重要性

煤炭选矿设计,煤质的分析和检测是确保煤的质量的关键。企业必须对原煤的煤质进行分析与检验,确保在选煤厂的设计中,对煤质进行合理、有效的分析和检验,并能正确地指导选煤厂的生产过程,同时建立、健全煤炭质量管理制度,加强煤炭质量监控,使煤在不同生产阶段都能得到较好的质量控制。     

煤质化验中减少误差途径和方法

煤质化验不仅关乎煤炭的质量,还直接影响到煤炭价格和煤炭企业的经济效益,是煤炭开发利用的关键技术。本文基于对煤质化验过程的分析,探讨了影响煤质化验结果精确度的误差来源,参照煤质化验国家标准,提出了减少煤质化验误差来源的途径和方法。本文研究结果对如何降低煤质化验误差影响提供了参考和理论指导。     

提高煤质化验准确性的方法探讨

煤炭作为一种传统能源,一直在能源领域中扮演着重要角色。而煤质化验作为煤炭生产中的重要环节之一,一直以来都受到了来自相关专业人士的高度关注。文章介绍了煤质化验中误差产生的原因,列举了煤质化验采样流程中的要点,并提出了煤质化验工作改进的建议,供相关专业人士探讨研究。     

煤质检验数据的审核

介绍了开滦(集团)有限责任公司煤炭出矿前六个层次煤质检测方法的相关关系,出现异常检测数据时的处理方法以及运用日常掌握的煤质检验数据对外销煤炭质量进行预测和对煤质检测数据的审核方法。     

浅析煤的水分测定中应注意的一些问题

在详细介绍煤中水分分布的基础上，提出某些企业和个体化验室在煤质检验工作中由于没有严格执行GB／T212标准，忽视分析水分对煤质检测工作的重要性，造成同一样品检验结果的不一致性，从而产生煤炭质量纠纷。     

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。