钾长石煅烧活化制备钾硅肥试验研究

钾长石富含钾、硅及其它对农作物有益的多种元素。通过对钾长石中Ｋ２Ｏ、ＳｉＯ２、ＣｕＯ、ＺｎＯ、Ｆｅ２Ｏ３、ＣａＯ组份的水溶性研究,结果表明,钾长石中添加５％￣１０％的碳酸钠,并在７００℃左右煅烧１５￣３０ｍｉｎ,能使Ｋ２Ｏ水溶性由６．７０ｍｇ／ｇ增至６７．８ｍｇ／ｇ,ＳｉＯ２水溶性由０．１４１ｍｇ／ｇ提高到６．０４１ｍｇ／ｇ,可用来制备富含多种微量元素的钾硅肥。     

超细石英粉在红外陶瓷材料中的应用

超细石英粉经热压成型（ＨＰ）制红外陶瓷材料，工艺简单，原料成本低。作者研究了材料的热膨胀性能，分析了ＳｉＯ２粒度及添加剂Ａｌ２Ｏ３、Ｆｅ２Ｏ３对材料在８￣２５μｍ波段红外发射率的影响。结果表明，红外材料在３００℃时的热膨胀率小于４×１０＾－６／℃，红外发射率大于８４％。     

处理煤系硫铁矿的新途径

阐述了用γ－Ｆｅ２Ｏ３．Ｈ２Ｏ及ＦｅＯ（ＯＨ）处理煤系硫铁矿的方法及最佳条件，试验表明明在γ－Ｆｅ２Ｏ３．Ｈ２Ｏ的量为６０ｇ／Ｌ，溶液酸度在ｐＨ０．５～１．０范围内，通过０．３Ｌ／ｍｉｎ的空气并加热至沸的情况下，对１０ｇ／Ｌ硫铁矿反应１６ｈ，硫铁矿硫脱除率可达９０％以上，比单纯用ＦｅＣｌ３氧化硫铁矿快３ｈ以上。     

MOCVD—YBCO／Ag膜的显微组织

用ＸＲＤ、ＳＥＭ和ＥＤＳ研究了用三源分别蒸发和单溶液源超声雾化蒸发ＭＯＣＶＤ－ＹＢＣＯ／Ａｇ超导膜的显微组织和成分。两种工艺所制ＹＢＣＯ样品的ＴＣＯ为８８～９１Ｋ。静态沉积ＹＢＣＯ／Ａｇ膜的电流密度Ｊｃ高于动态沉积样品。其中单溶液源超声雾化ＭＯＣＶＤ－ＹＢＣＯ／Ａｇ膜的Ｉｃ和Ｊｃ最高达到３５８Ａ和２２×１０５Ａ／ｃｍ２（７７Ｋ，０Ｔ）。     

稀土铝合金导电母线的研制

为满足输变电工程对导电铝合金母线提出的技术要求，试验了４种稀土变形铝合金，通过对比试验，优选了一种高导电、高强度的稀土铝合金（Ａｌ－０５Ｍｇ－０６Ｓｉ－０２Ｃｕ－０３５Ｆｅ－００５Ｔｉ－０２ＲＥ）。     

ICP－AES法测定四氟化铀标准物质中Cr、Fe、Mo、Ni和Ti

本法采用２５％（ＮＨ４）２ＣＯ３和Ｈ２Ｏ２溶解ＵＦ４，利用２３７－季铵萃淋树脂色谱分离技术，将ＵＦ４中铀与待测杂质元素在６．５ｍｏｌ·Ｌ（－１）ＨＮＯ３介质中定量分离后，及９７５型ＩＣＰ直读光谱仪同时测定ＵＦ４标准物质中Ｃｒ、Ｆｅ、Ｍｏ、Ｎｉ和Ｔｉ。取样３００ｍｇ时，分析结果均落在标准值的置信区间内，相对标准偏差＜１０％。测定下限为０．０４×１０－６～０．０７３×１０－６。     

铁水快速定硅测头的研制和应用

炼铁高炉热状况控制和低硅铁冶炼、铁水炉外脱磷及某些稀有元素回收等工艺都要求能够快速确定铁水中的硅含量，而传统的化学和光谱分析法不能满足这一要求。本专题用一种测头能直接、迅速、准确地测量铁水中的硅含量。这种硅测头是用ＭｇＯ稳定的ＺｒＯ２作固体电解质，ＺｒＯ２＋ＺｒＳｉＯ４为辅助电极制成的，测头电池表达式为：Ｍｏ－ＺｒＯ_｜〔Ｓｉ〕Ｆｅ｜ＺｒＯ_２＋ＺｒＳｉＯ_４｜ＺｒＯ_２（ＭｇＯ）｜Ｍｏ＋ＭｏＯ_２｜Ｍｏ在实验室中，用这种测头进行了各种条件下的硅含量测试，它能在１０ｓ内测出硅电动势，且具有较高的分辨率。测试电动势与理论值十分相近，说明这种测头可靠。用到工厂高炉炉前测试高硅铁水中硅，大部分测试成功；在低硅铁水中，正常操作时，３～５ｓ就能得到稳定的硅电动势，硅含量测定值与分析值偏差小于０．１ｗｔ％，测试成功率可达９０％以上。此类测头能满足工业要求，可投入实际应用。     

催化动力学－停流光度法测定微量铁──H_2O_2－变色酸体系

用停流光度法研究了Ｆｅ（２＋）对Ｈ_２Ｏ_２氧化变色酸动力学反应体系的催化作用，建立了快速测定铁的停流动力学光度法，测定条件为：Ｈ２Ｏ２１．０％，变色酸７．５×１０－３ｍｏｌ／Ｌ，ＰＨ１．８，反应温度２８℃，在４３５ｕｍ处测定吸光度。本法线性测定范围为０．１５－１．２μｇ／ｍＬＦｅ（２＋），检出限为０．０１２μｇ／ｍＬ。停流技术的应用大大缩短了分析周期，明显提高了选择性。     

磁选分离埃及阿塔图矿磷酸盐矿石中的含Fe^3＋的白云石

阿布塔图尔磷酸盐矿床由于含Ｆｅ＾３＋的白云石的存在而具有特性,其中,白云石中含有６０％Ｓ、７０％的ＭｇＯ,可以采用磁选的方法降低各粒级中ＭｇＯ的含量,事实上,高梯度磁选机（ＨＧＭＳ）的温式磁选分离,适合于２１０－７４μｍ和７４－３８μｍ料级,经化验,分别含有２．６％和５．８％的ＭｏＯ（原矿白云石中ＭｇＯ一为７５％得到的最终精矿品位为Ｐ２Ｏ５３１．２％和ＭｇＯ１．１７％,磷酸盐回收率为７０％,而１５     

Bi2S3矿浆电解热力学

由Ｂｉ２Ｓ３在ＮａＣｌ溶液中的溶解度,Ｂｉ２Ｓ３－Ｃｌ－Ｈ２Ｏ系的电位－ｐＨ,电位－ｌｇ「Ｃｌ」图分析表明：Ｂｉ２Ｓ３矿在氯盐水溶液中的溶解度有了很大的提高,在矿浆电解时它同时存在三种浸出机理。即 １．化学溶解,Ｂｉ２Ｓ３（Ｓ）＋３ｎＣｌ（ａｑ）＋６Ｈ（ａｑ）＾＋＝２ＢｉＣｌ＾３－ｎｎ（ａｑ）＋３Ｈ２Ｓ＾０（ａｑ） ２．化学氧化。Ｂｉ２（３Ｓ）＋６Ｆｅ＾３＋（ａｑ２）＋２ｎＣｌ＾－（ａｑ）＝６Ｆｅ     

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 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

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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     

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.     

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.