某矿山硫酸钠选冶废水电解综合利用研究

本文介绍了某金矿选冶过程中产生的硫酸钠废水的电解综合利用试验结果,阐述了该硫酸钠盐水的预处理流程,探索了硫酸钠浓度、电流强度、膜材料种类等因素对电解效率的影响,通过电解工艺处理该废水,阴阳极分别产生氢氧化钠和硫酸溶液,可以直接回用于现场工业生产中,有利于矿山循环经济的发展。     

固定床三维电极电催化氧化深度处理氨氮废水

研究了以无烟煤柱状活性炭为粒子电极的固定床三维电解反应器对黄金冶炼厂废水的氨氮进行深度处理。结果表明,较二维电解,采用三维电解能有效提高反应器的单位时、空处理效率。电流密度提高,氨氮去除速率提高,但能耗也提高。废水初始pH提高,氨氮去除率也提高。该三维电解反应器适用于处理中低浓度氨氮废水。     

电解浮选技术在选矿及废水处理中的研究进展

电解浮选技术是一种利用电解池原理，通过电解水来获得微泡的方法。其特征是电解产生的气泡直径小，在微细粒浮选、废水处理方面具有特征优势。随着资源"贫、细、杂"特点的突出和绿色化工思想的增强，微细粒浮选、废水中金属离子处理及油水分离的研究与应用必将获得广泛关注。本文总结了电解浮选技术在金属、非金属、煤等细粒物料及废水中油水分离、重金属离子去除、固液分离等研究进展，旨在为电解浮选法的深入研究和推广应用提供借鉴。      

电催化氧化法去除黄金冶炼废水中氨氮中试试验

采用电催化氧化法进行了紫金矿业集团股份有限公司黄金冶炼废水中氨氮去除中试试验。结果表明:电解时间对氨氮去除效果具有显著影响;间歇电解的处理效果优于连续电解、处理成本低于连续电解;电催化氧化法处理氨氮废水具有处理成本低、效果好、操作环境友好等特点,具有一定的工业应用前景。     

马钢1720线冷轧废水的预处理工艺

针对马钢1720线冷轧废水中的乳化液废水(包括含油废水)、电解脱脂机组废水、酸性废水存在现有污水处理设施无法满足GB 13456—2012排放标准要求的问题,设计了乳化液废水、电解脱脂机组废水、酸性废水预处理工艺,使其废水经过预处理后满足进入生化系统的要求。     

用浮选法从碱性冶炼废水中回收镍和钴

中国金川镍矿的冶炼废水中,含有镍电解及钴电解两个工程的混合废水,为pH8.8的碱性废水,含75一loomg/INi,含25一连omg/ICo,而且其中溶解了高浓度的氯化物、硫酸盐、碳酸盐等。镍和钻以氢氧化物或碳酸盐的微细粒沉淀。为从这种废水中用浮选法回收镍与钻,制成了与实际冶炼废水相近的废水试样,以     

含砷酸性废水中砷的氧化过程研究

研究了含砷酸性废水中As(Ⅲ)的氧化过程,分析了As-H2O系E-p H图,采用电解产生的H2SO5对As(Ⅲ)进行氧化和电解,对硫酸-砷混合体系中的砷进行氧化。试验结果表明,三价砷的氧化电位高于0. 3 V,且低于氧气析出电位,随着pH值的增大,砷的氧化电位逐渐降低。电解电压选取6 V,在此条件下会产生过一硫酸,加入0. 5 g/L硫氰酸铵抑制析氧副反应的发生,提高电流效率。对比了相同条件下单纯利用电解产生的过一硫酸氧化As(Ⅲ)和电解氧化As(Ⅲ)的效果,发现电解氧化As(Ⅲ)的氧化率要高于单纯过一硫酸的氧化率,说明在利用较高电压电解氧化三价砷时,其实质是电化学氧化和电解产生的过一硫酸氧化共同作用的结果。     

冶金行业高浓度COD废水处理新工艺技术研究

冶金硅钢生产过程中产生的钢涂料废水具有很高的COD，且生化性较差，为解决该废水的达标排放问题，针对该废水的特点，研究了一体化新型水处理工艺，有效地解决了废水的高COD问题。     

铁碳微电解填料制备及其降解黄药研究

微电解是一种有效、廉价、绿色的工业废水预处理技术。本研究以铁、碳、粘结剂、造孔剂为原料优化设计制备出了微电解填料，并考察了其用于降解去除异丁基黄药的效果，重点研究了反应时间、填料用量和模拟废水初始pH值对微电解降解异丁基黄药的影响，并用GC-MS测定异丁基黄药降解后产物。结果表明，填料最佳制备条件为:m（Fe）/m（C）=1 GA6FA 1、粘结剂含量为20%、造孔剂含量为3%、煅烧温度为900 ℃、煅烧时间为2.5 h。微电解降解异丁基黄药最佳条件为:模拟废水初始pH=7、反应时间为90 min、填料用量为500 g/L，在此条件下溶液中异丁基黄药、COD、和TOC最终降解率分别为89.91%、79.91%、和35.87%。微电解降解异丁基黄药的最终产物是CO₂、H₂O和SO₄2-。微电解可以用于净化降解选矿废水残留药剂。      

电气石陶瓷催化过硫酸盐降解甲基橙的研究

为了适应绿色催化的客观要求，选择天然铁电气石、膨润土等制备了电气石质陶瓷，用来催化过硫酸盐以降解废水。采用X射线衍射（XRD）、扫描电镜（SEM）和比表面积测试（BET）等方法对制备的电气石陶瓷进行表征；以常用的甲基橙溶液为模拟废水，过硫酸钠为氧化剂，考察配方、烧成温度、烧成气氛等制备工艺对电气石质陶瓷活化过硫酸钠降解模拟废水能力的影响。结果表明，600℃烧成的铁电气石陶瓷，其活性优于480℃烧制；600℃还原焰烧制的电气石质陶瓷活性最优，且使用30次后60 min降解率未明显衰减。     

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.     

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.     

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     

Brief news

正Corun invested another 50 million yuan in power battery for HEV Hunan Corun announced on 27 June that they had signed the cooperation agreement to jointly built Corun(Shaoxing)Autos Power Battery System Co.,Ltd.in Shaoxing Binhai New City.According to the announcement,total registered     

铜熔炼中锍品位对杂质元素分配行为的影响

借助于多相、多成分系统中平衡计算的手段，开发出微量元素砷、锑、铋及伴生元素铅、锌等在铜熔炼中分配行为的计算机模型。利用该模型对铜熔炼过程进行计算机模拟，分析了冰铜品位对砷、锑、铋、铅和锌等杂质元素的分压、活度系数及它们在冰铜、炉渣和气相中分配率的影响，并讨论其热力学分析结果对生产实践的指导意义。     

China rare earth market review

正November 1~10,2014Chinese rare earth market was still inactive.Demand for rare earth products was weak.Consumers took a wait-and-see attitude for lower price.As it was an off season for rare earth products,it was expected that prices of rare earth could continue turbulence at the bottom in short terms.Due to a sharp drop,demand for rare earth from downstream recovered.Affected by new energy vehicles,wind powder and energy-efficient appliances,production of rare earth permanent     

China rare earth market review

正August 1~10,2014 There was some good news in rare earth industry recently.Restructuring plans of rare earth groups led by Baotou IronSteel Group and Xiamen Tungsten Group respectively have been approved by MIIT.And rare earth storage policy,which had been expected for a very long time,has been launched officially.Pushed by the good news,rare earth price started to rebound since August 5.Price of didymium oxide and dysprosium oxide rose about 1% to 2%,averagely.About 10% of     

China rare earth market review

正July 1~10,2014Due to weak demand from downstream industry and slow transactions,rare earth market remained weak and price of rare earth products continued to decline.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,