某难浸高砷金精矿的微生物氧化—氰化浸出的初步研究

本文从酸度、矿浆浓度、磨矿细度、搅拌速度、充气量及金精矿是否脱药等几个主要方面，对含砷１２．５％的难浸高砷金精矿井行了微生物氧化－氰化浸出研究，获得了脱砷率８４．６４％，金浸出率９５．５５％的优异指标。     

某难浸高砷金精矿的微生物氧化一氰化浸出的初步研究

本文从酸度、矿浆浓度、磨矿细度、搅拌速度、充气量及金精矿是否脱药等几个主要方面，对含砷１２．５％的难浸高砷金精矿进行了微生物氧化—氰化浸出研究，获得了脱砷率８４．６４％，金浸出率９５．５５％的优异指标。     

永平低品位原生硫化铜矿石细菌浸出条件研究

为回收利用永平铜矿废矿石中的低品位原生硫化铜矿资源，通过摇瓶实验，研究了接种量、初始Fe^2＋浓度、矿浆酸度、矿石粒度和矿浆浓度等条件对永平低品位原生硫化铜矿石细菌浸出的影响。研究结果表明：有利于铜浸出的条件是接种量20％，初始Fe^2＋浓度0g／L，初始pH值1．2，浸出过程控制pH值小于1．50，矿石粒度5mm，矿浆浓度20％～25％；溶液中三价铁含量过高或产生铁的沉淀都会直接影响细菌的浸矿效果；尽管浸矿细菌能很好地适应浸矿环境，但铜的浸出速度偏慢、浸出率偏低，有待于采取强化浸出措施。     

张家口金矿石充氧氰化浸出研究

对张家口金矿石进行充氧氰化浸出，使矿浆的溶解氧浓度成倍增加，可以克服常用规机械搅拌氰化浸出在起始阶段存在的矿浆溶解氧供给不足，加快金的溶解速度，缩短浸出时间，充氧氰化浸出１２ｈ，浸出率可达９４．５８％，而常规机械搅拌氰化浸出２４ｈ，其浸出率仅有８６．１８％。     

张家口金矿石充氧氰化浸出研究

对张家口金矿石进行充氧氰化浸出，使矿浆的溶解氧浓度成倍增加，可以克服常规机械搅拌氰化侵出在起始阶段存在的矿浆溶解氧供给不足，加快金的溶解速度，缩短浸出时间，充氧氰化浸出１２ｈ．浸出率可达９４．５８％，而常规机械搅拌氰化浸出２４ｈ．其侵出率仅有８６．１８％。     

钼尾矿中钼、铜和铁的生物浸出实验研究

使用浸矿微生物对钼尾矿进行生物浸出,在钼尾矿质量10 g、矿浆浓度10%(w/v)、微生物加入量10 mL(微生物初始浓度2×10⁷个/L)、浸出温度28 ℃条件下,经过21 d生物浸矿,钼尾矿中的Mo、Cu和Fe浸出率分别达到82.87%、83.73%和88.78%,钼尾矿中的重金属含量大大降低。物相分析结果表明,浸矿微生物对尾矿中的辉钼矿、黄铁矿和黄铜矿的氧化作用,以及铁离子对辉钼矿的化学浸出作用,实现了尾矿中Mo、Cu和Fe的有效浸出。     

硫化镍矿生物浸出研究进展

微生物浸出技术是处理低品位硫化镍矿的有效方法之一。硫化镍矿生物浸出技术的研究对象主要包括浸矿菌、浸出机理、浸出工艺及影响因素等。介绍了硫化镍矿生物浸出常用菌种以及近年来开发的高效浸矿菌;论述了硫化镍矿生物浸出作用机制,即硫化镍矿微生物浸出是在直接和间接共同作用下被氧化溶解,同时也存在“原电池效应”引起的电化学氧化作用,在此基础上综述了硫化镍矿生物浸出机理的研究进展;总结了培养基、矿浆温度、矿浆pH值、矿浆浓度、表面活性剂等因素对低品位硫化镍矿生物浸出的影响;指出今后应从细菌培育、微生物代谢、浸出强化技术以及工艺条件优化等方面开展低品位硫化镍矿生物浸出技术研究。     

银离子对钴矿石微生物浸出的影响

在微生物浸出钴矿石过程中添加银离子,考察了银离子对浸矿细菌生长、钴矿石生物浸出行为的影响。结果表明,银离子添加量对浸矿细菌的生长有直接影响,当添加量低于20 mg/L时,银离子对浸矿细菌的生长影响不大,但继续提高银离子浓度将对浸矿细菌的生长产生抑制作用;添加银离子能够加速含钴矿物的氧化溶解速率,显著提高金属浸出率,在矿浆浓度10%、浸出温度38 ℃、转速160 r/min、银离子浓度15 mg/L条件下,银离子的催化效果最佳,此时金属钴浸出率可提高28.0%,金属铜浸出率可提高26.8%。     

大洋多金属结核芳胺还原酸浸研究Ⅰ.苯胺还原酸浸法

提出应用芳胺类化合物--苯胺还原酸浸大洋多金属结核的新方法。研究表明，苯胺是大洋多金属结核酸浸的高效有机还原剂，常温（室温）、常压下，添加少量苯胺，将多金属结核矿样在酸介质中浸出10～20min。各有价金属即可得到很高的浸出率：锰、钴、镍大于97％。铜大于91％。该方法浸出工艺条件简单，矿浆易于固液分离，药耗小，苯胺来源厂，价格低。该方法具有很好的应用前景。     

大洋多金属结核芳胺还原酸浸研究：I.苯胺还原酸浸法

提出应用芳胺类化合物－苯胺还原酸浸大洋多金属结核的新方法。研究表明，苯胺是大洋多金属结核酸浸的高效有机还原剂，常温（室温）、常压下，添加少量苯胺，将多金属结核矿样在酸介质中浸出１０￣２０ｍｉｎ，各有价金属即可得到很高的浸出率：锰、钴、镍大于９７％，铜小于９１％。该方法浸出工艺条件简单，矿浆易于固液分离，药耗小，苯胺来源广，价格低。该方法具有很好的应用前景。     

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     

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 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,     

New energy vehicle:an opportunity for rare earth magnets

<正>Extracted from Securities Guide 1.Popularity of new energy vehicles—an irresistible market trend1.1 Progress of new energy vehicles Chinese Premier Li Keqiang said recently on a visit to Xi'an BYD Autos that new energy vehicles,especially new energy bus,can lessen environment and noise pollution.He encouraged the use of new     

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