新型大孔径静态破碎技术的试验研究

在传统静态爆破的基础上,提出了一种新型大孔径静态爆破技术,使用新型扩孔钻头结合机械堵孔器解决了大孔径静态爆破的冲孔问题。由于孔径的增大,使得破碎剂膨胀压力增大,膨胀剂反应速度加快,加大了堵孔难度。设计的新型扩孔钻头和新型堵孔器进行了孤岩块的大孔径静态爆破试验,试验结果证实了该新型大孔径静态爆破技术的可行性,达到了提高爆破能力和缩短破坏时间的预期目的。为今后的敏感地区岩石爆破工程开挖提供了新途径。     

大直径中空眼在岩巷掘进中的应用

岩巷掘进速度的关键在于掏槽,随着对掘进进尺的提高,要求炮眼越来越深。针对现阶段直眼和楔形掏槽技术的特点,为了克服深孔掏槽爆破效果差的难题,引入了大直径中空眼直眼掏槽技术。通过大直径中空眼的作用,改变了掏槽眼爆破的能量释放顺序,同时大直径中空眼的预裂作用提高了掏槽孔的爆破效果。通过数值模型分析了大直径中空眼对周围岩体破碎和掏槽眼的作用。工程实践表明,大直径中空眼配合直眼掏槽,在爆破进尺、炮眼利用率等方面优于常规直眼掏槽技术,具有良好的适用性。     

提高岩巷掘进爆破速度和质量的若干技术问题探讨

结合岩石爆破破碎理论和现场施工实践,对影响岩巷掘进中深孔爆破掘进速度和巷道质量的炮眼深度、掏槽爆破和光面爆破等若干技术问题进行了研究,提出了合理的掏槽形式和掏槽参数、光爆装药结构和光爆参数。     

大孔径复合掏槽在中深孔爆破中的应用技术

大孔径复合掏槽是根据爆破理论,在小孔径炮眼爆破的基础上为了提高中深孔爆破效果而提出来的,有效提高了爆破效果。     

立井深孔直眼分段掏槽改善爆破块度机理的分析与研究

利用微差爆破破岩理论,对分段掏槽改善破碎块度的机理进行了分析,最后结合单孔爆破漏斗试验和掏槽爆破试验,分析研究直眼分段掏槽对破碎块度的影响,两种实验都证明,分段掏槽爆破可提高掏槽效率,改善破碎块度,因此在进行中深孔爆破特别是深孔爆破时应优先考虑选用。     

岩巷中深孔爆破合理掏槽型式的确定

直眼掏槽爆破槽腔的形成过程分为岩石破碎和破碎岩石抛掷两个阶段,本文结合直眼掏槽破岩机理和工业试验,对岩巷中深孔爆破中的掏槽爆破进行了研究,得出了适用于试验巷道合理的掏槽型式。     

关于港道掘进爆破中的一些技术问题

结合岩石爆破破碎理论和工程实践,从影响凿岩爆破效果等诸因素出发,对岩巷掘时中深孔爆破的掏槽的光爆等一些技术问题进行了较为细致地分析和研究,提出了炮眼深度的选择方法,推荐了较为合理的掏槽形式和掏槽参数、光爆装药和光爆参数。     

岩巷快速掘进爆破技术研究

结合岩石爆破破碎理论和工程实践,从影响凿岩爆破效果等诸因素出发,对影响岩巷掘进中深孔爆破掘进速度和巷道质量的炮眼深度、掏槽爆破和光面爆破等若干技术问题进行了较为细致地分析和研究,提出了较为合理的掏槽形式和掏槽参数、光爆装药结构和光爆参数。     

水平巷道中棱柱形掏槽炮眼布置的基本研究

在炸药爆破作用下不易塑性变形的脆硬岩石中应用棱柱形掏槽效率最高。在国外许多采矿企业中进行了确定棱柱形掏槽合理参数的实验和理论研究。在白云石化的石灰岩层中进行了各种结构的棱柱形掏槽的研究。破碎岩石所消耗的能量按破碎岩石体积和爆破后形成的掏槽孔大小或掏槽眼和崩落眼间的破碎带大小来确定。确定,崩落眼直径对爆破结果的影响     

静态破碎剂膨胀力学性能试验研究

针对静态破碎剂的膨胀力学性能进行了深入研究,具体分析了水灰配比、拌和温度、孔径对膨胀压力的影响,通过数据分析得到了相应条件下的膨胀压力曲线。通过对比不同水灰配比下径向膨胀压力的大小,并同时考虑到破碎剂的流动性,得出静态破碎剂的最佳水灰比应控制在0.2～0.3之间;静态破碎剂随着孔径的增大膨胀压力逐渐增大,且轴向与径向膨胀压力之间的差异因为破碎剂水化固结后泊松比的增大而逐渐减小;拌和水温温度的增大能够加快破碎剂水化反应的进程。总结分析各条件下膨胀压力的试验结果可将水化反应划分为水化反应预热、快速反应膨胀、热量散逸降压、压力稳定4个阶段。     

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     

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。     

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