新疆滴水高氧化率泥质氧化铜矿氨浸试验研究

针对新疆滴水氧化铜矿石特性,进行氨浸试验研究,对影响铜浸出的各个因素进行了全面系统考察,得到了该氧化铜矿的最佳浸出条件,即在45℃、氨水浓度2.5 mol/L、碳酸氢铵浓度1 mol/L、矿石粒度-0.074 mm占85%,液固比2∶1条件下,以400 r/min的搅拌强度进行搅拌浸出2 h以后,铜的浸出率可达85%以上。     

某含铜铀矿石浸出工艺条件试验研究

根据某含铜铀矿石的矿物特性和化学组成,开展酸法搅拌浸出及柱浸条件试验,探索处理该矿石的最佳工艺条件。试验结果表明:采用酸法搅拌浸出,铀浸出率达到96.3%,但铜浸出率仅为40.2%;采用柱浸出,铀浸出率达到94.4%,铜浸出率为63.6%。推荐采用堆浸工艺从该矿石中回收铀和铜,其工艺参数:矿石粒度为-10mm,软锰矿用量为2%(与矿石质量比),硫酸质量浓度为30g/L,喷淋强度为20L/(m2·h),淋停时间比为1∶1。     

尼日利亚某氧化铜矿石选矿试验

尼日利亚某铜矿石属于铜品位高、氧化程度深、含泥量大、铜矿物组成复杂且嵌布粒度粗细不均的难选氧化铜矿石。为确定矿石的合理开发利用工艺,分别进行了硫化浮选工艺和硫酸酸浸工艺研究。结果表明,矿石在磨矿细度为-0.074 mm占90%的情况下,采用1粗4精3扫浮选流程处理,可获得铜品位为20.23%、铜回收率为74.35%的铜精矿;矿石在磨矿细度为-0.074 mm占55%、硫酸浓度为74 g/L、矿浆浓度为33%、浸出时间为2 h、搅拌速度为300 r/min的情况下,铜浸出率可达77.22%。从节能、增效角度考虑,酸浸工艺相对更适合该矿石的处理,在磨矿细度-0.074 mm含量从90%降至55%的情况下,铜浸出率高出浮选工艺铜回收率2.87个百分点。     

非洲某氧化铜矿石浸出试验

非洲某选厂铜矿石以氧化矿为主,铜品位为1.53%、钴品位为0.024%。现场采用浸出工艺回收其中的铜钴资源,随着生产的进行,矿石铜品位逐渐降低,采用原工艺生产,成本较高并且生产指标不稳定。为此,对进入浸出体系的氧化铜矿石重新进行了搅拌浸出试验研究。研究表明：最佳浸出条件为浸出温度65 ℃、矿浆浓度30%、浸出时间3 h、搅拌速度500 r/min,萃余液返回利用,补加酸量为20.24 kg/t,获得了铜浸出率为78.65%、钴浸出率为45.25%的指标。较原现场工艺流程,铜、钴浸出率分别提高了3.65和2.25个百分点。试验结果可以为现场生产提供重要的技术支持。     

碳酸铵溶液浸出非洲氧化铜矿的研究

以碳酸铵作浸出剂, 利用其受热分解产生氨气的性质, 对非洲低品位氧化铜矿进行氨性浸出, 考察了矿石粒度、碳酸铵浓度、液固比、反应温度、反应时间、搅拌速度等因素对浸出效果的影响。研究表明, 最佳浸出条件为矿石平均粒度0.150 mm、碳酸铵浓度1.55 mol/L、液固比4∶1、反应温度65 ℃左右、反应时间2 h、搅拌速度350 r/min, 此时铜浸出率达到92.4%, 氨回收率达到95.5%。     

东川某难选氧化铜矿石氨基甲酸铵浸出试验研究

东川某氧化铜矿矿石铜品位为1.16%,铜氧化率很高,92.10%的铜以氧化铜的形式存在,碱性脉石含量高,铜矿物嵌布粒度较细,嵌布特征复杂,属高钙镁难选氧化铜矿石。为合理开发利用该矿石,针对硫化—浮选和酸碱浸出效果较差的问题,采用氨基甲酸铵作为浸出剂进行浸出试验研究,考察磨矿细度、氨基甲酸铵用量、浸出温度、浸出时间、搅拌强度、液固比对铜浸出率的影响。在确定的最佳浸出试验条件下,最终可获得铜回收率为85.42%、损失在浸渣铜品位仅为0.194%的良好指标。该浸出试验结果可为该碱性难选氧化铜矿石的工业利用提供技术参考。     

玉龙铜矿氧化矿石合理浸出工艺研究

对西藏玉龙铜矿氧化带矿石进行全粒级柱浸和洗矿-矿砂柱浸-矿泥搅拌浸出试验,结果表明：全粒级柱浸时矿石渗透性差,提高滴林强度易出现积液现象,难以顺利浸出;洗矿后矿砂的渗透性能好,可使柱浸铜浸出率达到78%以上,同时矿泥搅拌浸出的铜浸出率可达96%以上。根据试验结果,认为洗矿-矿砂堆浸-矿泥搅拌浸出是处理玉龙铜矿氧化带矿石的合理工艺。     

刚果(金)某铜钴矿酸浸实验研究

对刚果(金)某铜钴矿进行了酸浸实验研究,考察了磨矿细度、反应温度、硫酸用量、亚硫酸钠用量、矿浆浓度、反应时间对矿石中铜钴浸出率的影响。结果表明,当磨矿细度-0.074 mm粒级占80%、矿浆浓度33%、硫酸用量110 kg/t_矿、亚硫酸钠用量20 kg/t_矿、常温搅拌浸出5 h时,浸出尾渣铜钴品位分别为0.26%和0.025%,铜钴浸出率分别为94.85%和93.15%。     

云南某难选氧硫混合铜矿石的选矿试验研究

云南某铜矿石含铜1.02%,矿石中铜矿物种类复杂,结合率高,钙镁含量高,属典型的难选氧硫混合铜矿石。针对该矿石性质,对该铜矿石进行了详细的选冶试验研究:先将该铜矿强化浮选-反浮选脱钙镁,再将中矿进行加温强化浸出试验。最终确定了较佳的工艺条件为:经过一段磨矿,三次粗选,三次精选的闭路流程回收精矿,全中矿混合浸出,液固比3:1,矿浆温度70℃,搅拌速度300rpm,反应时间2h。研究结果表明,在此工艺条件下,采用混合浮选—强化捕收—反浮选脱钙镁—中矿加温浸出的选冶联合工艺可获得铜精矿品位10%左右,铜综合回收率大于70%,电解铜吨铜耗酸小于20t的技术经济指标。为该类铜矿石的分选提供一种新的途径。     

兰坪燕子洞含银氧化铜矿常温常压氨浸试验研究

针对兰坪燕子洞碳酸盐型含银氧化铜矿石高碱性、高砷、高结合率的特点,进行了常温常压氨浸试验研究。研究表明:常温常压,在氨水浓度1.5 mol/L,碳酸氢铵浓度1.5 mol/L,磨矿细度-0.074 mm占85%,液固比2.5∶1,浸出时间3 h条件下,铜浸出率可达70%。氨浸液经萃取-电积可得到99.95%的电积铜,有效地实现了铜元素的回收利用。     

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 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     

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.     

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.     

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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