KBr和KI改性钒钛钢渣脱除燃煤烟气Hg~0试验研究

为进一步提高固体废弃物钒钛钢渣(VTSS)吸附脱除Hg0性能,利用浸渍方法改性制取KBr/VTSS、KI/VTSS吸附剂,并运用XRD、SEM表征,在固定吸附床上研究了反应温度、烟气SO2、O2、H2O和改性剂负载量对Hg0脱除效率的影响。结果表明:升高反应温度显著提高Hg0脱除效率和累积吸附量,负载3%KI的吸附剂,其Hg0脱除效率最高,在200℃下的最高效率可达97.9%,吸附3 h后的吸附容量为163.4μg/g;SO2和H2O抑制Hg0的吸附,而O2显著促进Hg0的吸附;KBr、KI负载量的提高可促进Hg0脱除,分别负载10%KBr和3%KI的吸附剂,在120℃时Hg0脱除效率最高分别达到73.5%和90.6%,吸附3 h的累积吸附量分别达到114.1和153.1μg/g。     

凹凸棒石黏土/聚丙烯酸(钾)吸水复合材料研究

以甘肃会宁地区凹凸棒石黏土(凹土)与丙烯酸(钾)为主要原料,采用溶液聚合法制备凹土/聚丙烯酸(钾)吸水性复合材料,探讨了凹土、交联剂以及引发剂用量对吸水倍率的影响。结果表明,凹土用量为15%～20%、交联剂用量为0.1%、引发剂用量为1.5%～2.0%时,该材料吸蒸馏水和雨水的倍率可达到556.2(g/g)和550.10(g/g)。     

凹土的表面改性及其在雨靴面胶中的应用

用硬脂酸对凹凸棒石黏土 (凹土 )进行改性 ,改性的最佳条件为硬脂酸用量为 2 %、改性温度为 80℃、改性时间为 3 0min ,所得改性凹土的活化指数达 0 .95。改性凹土在雨靴面胶中的填充试验表明 ,改性凹土可以完全替代轻钙。     

凹凸棒石负载壳聚糖吸附废水中Cd^2＋的研究

根据凹凸棒石的离子交换特性和壳聚糖在酸性溶液中带有正电荷.以90%脱乙酰度壳聚糖为原料,对不同温度活化的凹土作表面改性.按壳聚糖溶胶与凹土质量比2:1的比例,制备了凹土负载壳聚糖复合吸附剂.通过对壳聚糖包覆率的测定,确定凹土活化温度在700℃时.其负栽率最大为32.6%.吸附废水中Cd2 最佳工艺条件是:凹凸棒石-壳聚糖颗粒吸附刺用量为15g/L,废水中Cd2 质量浓度不大于200mg/L,DH值为6～8,吸附平衡时间为5min,废水中Cd2 去除率为97%.     

负载锰活性炭对苯酚吸附性能的研究

以高锰酸钾为浸渍液,采用浸渍法对果壳活性炭进行改性制备负载锰活性炭(Mn/AC),通过SEM、BET、FTIR等技术对负载锰前后活性炭进行表征,并考察了其对苯酚的去除率,通过单因素实验研究了Mn/AC投加量及p H值对苯酚吸附性能的影响,采用吸附等温线模型、动力学模型对Mn/AC吸附苯酚过程进行拟合,研究其吸附特性及机理。结果表明,Mn/AC对苯酚的去除率是负载前(NAC)的3.7倍,25℃,不调节p H值,Mn/AC的投加量为5 g/L时,对苯酚去除率为95.4%;Freundlich模型可较好地拟合Mn/AC吸附苯酚过程,吸附动力学符合拟二级动力学方程。     

微波改性凹凸棒石黏土对废水中苯酚的吸附研究

采用热活化结合微波有机改性凹凸棒石黏土(凹土),突破了传统单纯物理改性或有机改性的局限性,提高了改性后凹土时苯酚的去除率,同时研究了凹土去除苯酚的最佳工艺条件,苯酚的去除率可达到99%以上,吸附后的污水符合国家污水排放标准.     

改性凹凸棒石黏土处理含氟废水研究

讨论了对凹凸棒石黏土的热处理及纯化改性方法,利用改性凹土对含氟废水进行处理,考察了热改性条件及纯化凹土在不同pH值、凹土投加量、吸附时间等因素下对氟离子去除率的影响。结果表明:热改性凹土和纯化凹土对含氟量高达100mg/L的废水都有较好的处理能力,氟离子去除率可达93.68%以上,处理后的废水符合国家许可排放标准。     

微波催化除铁增白凹凸棒石黏土

凹凸棒石黏土(凹土)因含有氧化铁或氢氧化铁而显红色,限制了它在石油与化工催化领域的使用。本实验对凹土采取活化、除杂,在酸性介质中采用液相微波催化反应、回流、分离等法,最终得到白色凹土。研究结果表明,这一工艺不仅加快了反应速率,与常规酸化法相比时间缩短近一半,同时铁脱除率最高可达91.2%,白度可达76.4%,反射率达58.6%。     

改性凹土处理印染废水

以聚二甲基二烯丙基氯化铵(PDMDAAC)和凹土为原料,制备PDMDAAC-凹土,并用此改性凹土对活性艳蓝模拟废水进行吸附处理,分析影响吸附性能的因素.结果表明,吸附剂的最佳用量、吸附时间与溶液中活艳蓝KN-R的起始浓度有关,溶液的pH值对去除率的影响较小.当活性艳蓝浓度为100mg/L时,吸附荆用量5%,吸附时间40min,模拟废水中的活性艳蓝KN-R的吸附去除率达到97.5%.     

PP/白云石凹凸棒土复合材料的制备与性能研究

采用硅烷偶联剂（SG-Si900）对白云石凹土进行有机表面改性,通过IR和TG-DTG对改性前后的凹土进行了表征。将经过表面处理的凹凸棒土与PP复合制备聚丙烯/凹凸棒土复合材料。力学性能实验表明,在凹凸棒土填充量达到2%时,复合材料的冲击和拉伸强度达到最大。     

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.