银钎焊剂水溶法改性处理工艺的优化

采用水溶法改性工艺制备银钎剂,正交试验表明,烘干时间对钎剂性能的影响最大,其次是成分配比及烘干温度.在配方为42%KF+23%KBF4+35%B2O3,烘干时间为45 min,烘干温度为350℃时,制备的银钎剂质量稳定且焊接效果良好.     

锤式烘干破碎机

随着湿磨子烧技术的开发，烘干破碎机于70年代初期首先在法国研制成功。进入80年代，烘干破碎技术在欧州取得较快发展。丹麦FSL公司研制出专用于湿磨干烧工艺的ET型烘干破碎机，并配备了比较完善的进．出料、气口检测和自动喷水高温保护装置；之后德国KHD公司也开发成功。进人90年代，随着湿磨干烧技术的发展，烘干破碎机已经在世界各国推广使用。锤式烘干破碎机，也叫烘干粉磨机。它是专为破碎烘干粘性、非研磨性的原料（例如白玉、粘土、泥浆过滤饼等）而设计。是一种将高含水率（S2％）的原料烘干破碎成低含水率（＜l％）粉状生料的…     

高纯钠基膨润土制备新工艺研究

在酸性膨润土开发的基础上,研究了钠化剂、钠化温度、时间及膨润土粒度对酸性膨润土钠化和除杂效果的影响。提出了在室温下,对３００目酸性膨润土用ＮａＣｌ经２４ｈ钠化处理,再经喷雾烘干制备钠基膨润土的新工艺。     

铜在纯铝基体中的扩散行为

制备Al-Cu共晶合金钎料，用SEM和EDS研究不同钎焊温度和保温时间条件下。纯铝棒料基体对接真空钎焊接头Cu元素的扩散行为。结果表明．钎焊温度过低、保温时间过短时。Cu元素在基体内部尚来能充分扩散，在基体晶界上严重偏析，生成Al-Cu相中最脆的θ相（Al2Cu）。提高钎焊温度和保温时间有利于提高Cu元素在Al基体中的扩散效果。但过高的钎焊温度又导致θ相的重新出现，选取最佳的钎焊工艺参数才能获得良好的钎缝质量。     

用离析──氰化物浸出法处理难处理的含锰银矿石的影响因素

大部分的含锰的银氧化矿石含有与银结合的锰，不能用传统的提取银的方法处理（包括标准的氰化法技术）．可是，如所周知，当把锰溶解，则可用传统的方法将银回收．在离析法过程中，矿石与少量食盐和还原剂一起加热到680℃～800℃，银被挥发，迁移和被还原成金属银粒子．用传统的氰化物浸出法处理产生的焙砂．在实验中对成分为0．02％Cu、0．09％Pb、0．33％Zn、12．55％Mn和187g／t的含锰银矿石进行了离析—氰化法的研究，研究了焙烧温度和时间以及食盐和焦炭加入量的影响。离析条件为850℃，食盐量2．0％，焦炭量为1．0％，时间30分钟；氰化浸出条件为室温，溶液含NaCN907g／t，pH11，时间72小时，结果得的银回收率97．8％。     

铝土矿生料浆烘干与烧结特性的试验研究

在试验室条件下,参照国外研究成果,结合我国碱石灰烧结法氧化铝生产实际,从生料浆黏度变化规律、生料浆烘干过程及生料浆烧结特性等方面进行了试验.研究试验结果表明:真钙比的变化对同一水分下生料浆黏度的影响不明显,当生料将水分＜38％时,生料浆水分和生料浆温度升高对生料浆黏度值影响较大;气态悬浮干燥器中料浆烘干温度应不低于60...     

氧化铝多孔支撑体的制备

采用挤出成型工艺，选择合适用量的开孔剂和合理的烧结温度及原料粒径，制备19通道的α-Al2O3。粉体，以7％碳粉为开孔剂，烧结温度为1300℃，可以成功制得孔径分布较窄、平均孔径为2．1μm、孔隙率为48．9%的多通道无机膜支撑体。实验中成功制备了管长1m，外径30mm，内径4mm的多孔氧化铝陶瓷膜支撑体。     

烟煤全水分烘干时间的研究

《煤中全水分的测定方法》(GB/T 211-2017)中方法B2规定了烟煤烘干时间为2 h,在工作中经常性遇到检验性干燥不合格的情况。为了找出更加合理的烘干时间,设计了一系列的试验,通过对不同煤种延长烘干时间,结果对比证明,烟煤样品烘干2.5 h时的结果,检查性干燥合格率得到提升,可以替代国标规定的2 h烘干结果。     

新型醇类起泡剂ОФС

ОФС起泡剂是废杂醇油氧化得到的醇类起泡剂。它的起泡性能强，泡沫稳定性差，形成的泡沫脆。ОФС起泡剂在铅铜矿石铅铜浮选回路中应用，铅精矿铅和银回收率相同，铜和金回收率分别提高1．3％和4．5％，ОФС起泡剂在铜锌矿石铜浮选回路中应用，所获的铜精矿铜和银回收率相近，金的回收率提高3．8％。     

膨润土增孔复合颗粒对Cr6+的吸附和抗菌性能研究

针对天然饮用水中重金属离子超标和生物污染加剧的现状，通过复合造粒，研究了颗粒处理水的综合性能。当增孔剂添加量为3％．黏结剂为0．5％，热处理温度650℃，盐酸浓度为1mol／L时，对即浓度为200μg/L人工水处理后，水中Cr^6＋含量降为8μg／L，明显低于国家饮用水质量指标。增孔剂对复合颗粒吸附Cr^6＋的影响较大，黏结剂对散失率影响较大。在复合颗粒中加入2％的载银抗菌剂后，对水中大肠杆菌的抑制能力这到98．6％。     

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