某铜矿高含泥氧化铜矿槽浸实验研究

针对某铜矿山氧化铜矿石含泥量高的现状,对该氧化铜矿石的类型和矿物组成进行了分析,对3种粒级(-0.295,0.295～1,-1mm)的矿样进行了酸法浸出实验。实验结果表明,其中0.295～1mm粒级的矿石可用槽浸工艺进行浸出。矿石渗透性良好,铜的浸出率为70.27%,铁浸出率为2.22%,酸耗为10.06t/t铜,具有较好的可浸性。     

微生物浸出中原生硫化矿的铜浸出率与时间相关性研究

通过室内摇瓶浸出试验，研究了不同粒级的原生硫化矿石铜的浸出率与时间的相关性。结果表明：采用液固比10：1，pH〈2．0的微生物浸出此类矿石，可以得到较好的浸出效果，总浸出率能达到32．6％。浸出液pH值在反应前30d逐渐上升，之后基本保持稳定；浸出液中溶解氧、菌种浓度等呈上升趋势。浸取液中的Cun浓度逐渐升高，粒径最小的矿样其浓度最大，浸出效果最好。浸取液中的ate离子浓度呈上升趋势，反应从第10～30d，浓度趋于平缓，30d之后，反应加剧，浓度上升较快。铜的浸出率与浸出反应时间呈一次线性关系递增，相关系数R保持在0.95以上，其曲线拟合得很好。     

赞比亚某氧化铜矿石的硫酸酸浸研究

赞比亚某低品位高结合率难处理氧化铜矿石铜品位为1.56%，主要铜矿物为赤铜矿、黄铜矿、铜蓝、水胆矾；主要脉石矿物为石英、云母、铁白云石等。铜氧化率高达82.85%，以结合氧化铜为主；硫化铜仅占17.15%，主要为原生硫化铜。为确定该矿石的合理开发利用工艺，进行了系统的硫酸酸浸试验。结果表明：①提高浸出试样细度，延长浸出时间，提高浸出温度，增大液固质量比和搅拌速度均有利于改善氧化铜矿石的浸出效果。②矿石在磨矿细度为-200目占60%、硫酸浓度为50 g/L、液固质量比为3、浸出温度为65 ℃、搅拌速度为300 r/min，浸出时间为120 min情况下，铜的浸出率达78.64%。③硫酸浸出该矿石的浸出动力学受化学反应模型控制，反应的表观活化能为37.83 kJ/mol。     

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。     

某高结合率土质氧化铜矿石强化浸出试验研究

对云南某黏土质氧化铜矿进行了浸出试验研究,试验结合不同粒级矿石的可浸性能差异,对矿石进行分级强化浸出。+0.074mm添加强化浸出剂ED-1搅拌浸出,-0.074mm加温80℃搅拌浸出。通过搅拌浸出条件试验,确定最佳浸出参数,最佳条件下铜综合浸出率81.93%,吨铜综合酸耗13.86t,铜浸出率较现有常温浸出工艺有了大幅提升。     

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%。     

赞比亚某氧化铜矿石的硫酸酸浸研究

赞比亚某低品位高结合率难处理氧化铜矿石铜品位为1.56%,主要铜矿物为赤铜矿、黄铜矿、铜蓝、水胆矾;主要脉石矿物为石英、云母、铁白云石等。铜氧化率高达82.85%,以结合氧化铜为主;硫化铜仅占17.15%,主要为原生硫化铜。为确定该矿石的合理开发利用工艺,进行了系统的硫酸酸浸试验。结果表明：①提高浸出试样细度,延长浸出时间,提高浸出温度,增大液固质量比和搅拌速度均有利于改善氧化铜矿石的浸出效果。②矿石在磨矿细度为-200目占60%、硫酸浓度为50 g/L、液固质量比为3、浸出温度为65 ℃、搅拌速度为300 r/min,浸出时间为120 min情况下,铜的浸出率达78.64%。③硫酸浸出该矿石的浸出动力学受化学反应模型控制,反应的表观活化能为37.83 kJ/mol。     

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。     

利用氧化铜矿石生产氧化铜实践

利用氧化铜矿石经“破碎—分级—酸浸—铁置换—海绵铜焙烧”生产出了氧化铜粉，铜浸出率８８．７５％，总直收率７５．０１％。该工艺经济效益显著，并介绍了其操作条件。     

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。     

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     

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