冶金铜渣及粉煤灰烧结砖的研制

以冶金废渣、粉煤灰和粘土为主要原料,加入一定比例的外加剂,采用烧结法制备了墙体砖。通过性能测试可知：该烧结砖的利废率可达75％～80％左右,且砖的力学性能良好,其抗压强度均达到了MU10-30的标准;当按矿渣45％、粘土10％、粉煤灰30％、碳酸钠5％和水玻璃10％配比配料,于950℃烧结并保温2h时,砖体的强度最高可达31．50MPa。     

环氧树脂/纳米粘土复合材料制备与性能研究

以十六烷基三甲基溴化铵对江西广丰蒙脱土有机改性,用红外光谱表征.插层聚合法制备环氧树脂/纳米粘土复合材料,对其力学性能进行研究,表明5%的纳米粘土加入量就可以大幅度的提高环氧树脂的冲击和弯曲强度.     

纳米级SiO_2对水泥窑用耐碱浇注料性能的影响

以粘土熟料为主要原料,同时加入纳米级SiO2、铝酸钙水泥、钾长石、瓷粉等制备耐碱浇注料,研究了纳米级SiO2加入量对水泥窑用耐碱浇注料的抗折强度、抗压强度、线变化率的影响。结果表明:添加5%的硅微粉,能明显改善耐碱浇注料的使用性能。     

CFRP材料加筋粘土的试验研究

作为新型材料CFRP材料应用于加筋材料在国内尚未开始研究．测试了CFRP材料作为加筋材料的力学指标试验．将CFRP材料作为加筋材料，应用3轴试验研究加筋粘土试样的强度变化规律．试验表明CFRP材料完全可以作为加筋材料，而且在粘土中加入CFRP材料后可以明显提高粘土试样的强度．试验表明CFRP材料不适合饱和度较大的粘土．图8，表5，参10．     

稀土改性凹凸棒石粘土用于净化柴油机尾气

凹凸棒石粘土经碳酸铈改性处理制得稀土改性凹凸棒石粘土，加入水、NaOH等配制成吸收液。在适宜的实验条件：吸收剂浓度为28％，pH值为11，稀土加入量为凹凸棒石粘土的6％，柴油机负荷80％时，碳烟脱除率为71．3％，NOx的脱除率可达90．6％，SO2和HC的脱除率分别为96．4％和91．3％。该净化技术己成功用于工程中。     

''''97上半年发明专利公报涉及粘土矿的专利信息

1．高岭土纤维增强硅酸钙板的制造方法《CN1139085A》原材料配方（wt％）：石棉12～24；玻纤0～3．5；纸浆0～3．5；钙质材料（其中CaO含量60％～70％）15～25；硅质材料50～70其中合高岭土60～100石英砂或瓷土0～40。原材料经制浆、抄取成型、蒸压养护后制成成品。采用高岭土取代大部分或全部石英砂，可节约成本，产品强度高，外观较好。2．唐三影壁画彩釉（CNll39087A）配方组成（％）为：红井58～64石英20～23，长石12一14苏们高岭L4～5。3．新型灭菌清洁用净剂（CNll406llA）一种以防润土和凹凸择石粘土相混合的装料再复配表面活性…     

酸处理凹凸棒粘土对Cd2+吸附性能的研究

用不同浓度盐酸活化凹凸棒粘土，考察了酸化凹凸棒粘土对Cd^2＋吸附率的影响。在此基础上，研究了溶液浓度、粘土加入量和悬浮液的pH值等因素对浓盐酸处理凹凸棒粘土吸附Cd^2＋性能的影响。结果表明，随着盐酸浓度的增加，酸处理凹凸棒粘土对Cd^2＋的吸附率增大。在Cd^2＋初始浓度为500mg／L、吸附液pH值为8．50、加入量为0．15g和吸附时间3h时，酸处理浓度12mol／L的凹凸棒粘土对C小’的吸附率可达86．24％。Cd^2＋的吸附同时符合Langmuir等温式和Freundlich等温式。     

累托石粘土在电瓷工业中的应用研究

根据累托石粘土具有可塑性、泥浆性能好、高温不开裂等特点,对湖北钟祥县所产的累托石粘土矿进行了研究。经选矿后除去硫铁矿的精矿含累托石在60～70％,TFe_2O_3低于1.5％,即可用做优质电瓷结合粘土。配方试验证明:累托石粘土具有结合性好、干燥烧成收缩小,其铝质高强度电瓷坯料烧成抗弯曲强度大于147 MPa,坯料塑性指标大于49 N·cm(5 kgf/cm~2),此指标完全可满足电瓷要求。研究结果表明累托石粘土是一种新型的优质电瓷结合粘土。     

广西球粘土是耐火材料用的优质结合粘土

广西球粘土为第四纪大型矿床，主要由无序高岭石组成。粒度细－2μm＞85％，可塑性指数36～47。铝高铁低，耐火度高，烧结范围宽，耐压强度大，荷重软化点高，是我国耐火材料用最好的结合粘土。     

从专利看珍珠岩(膨胀珍珠岩)利用的新动向

1．膨胀珍珠岩轻质砌块的配制方法（CN11411268A）在水泥中加入一定量粉煤灰、石膏、添加剂和水，抗匀后再加入膨胀珍珠岩继续搅拌，浇灌成型、养护、抽芯脱模即制得。该砌块重量轻、消音、隔热保温、无污染、工艺简单。2．一种轻质保温混凝土混合料（CN1141902A）组份申水泥和膨胀珍珠岩各占（重量比）13％～25％和2％～12％，煤渣占58％～72％。具有容重低、抗折强度高、隔热保温性能好等村点，适于制作特轻保温混凝土砌块。3．轻石板（CN1145340A）利用粉煤类陶粒、粘土陶粒、膨胀珍珠岩、轻质碳酸钙等轻骨料制成，可降低石板的密度…     

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