露天矿火区内3类爆破钻孔快速灭火降温方法

根据钻孔温度和孔底特性将露天矿火区高温爆破钻孔分为火区上部的爆破钻孔、打穿火区的爆破钻孔、火区附近的爆破钻孔等3类,并制定了3类高温爆破钻孔的灭火降温方案。根据灭火降温方案构建了以三相泡沫防灭火技术为主,灌浆、注水为辅的综合灭火降温系统,该系统具有快速、高效的特点,并成功的对东露天矿15万m2火区内的爆破钻孔灭火降温,保证了东露天矿的安全爆破和按时完成生产进度计划。     

汝箕沟矿区露天开采小窑火区快速治理技术

针对汝箕沟矿区露天开采,受小窑火区的影响,钻孔施工后温度过高,无法正常装药爆破,严重延缓了露天矿生产;钻孔高温以及火区产生有毒有害气体威胁作业人员的生命安全。特构建综合防灭火系统,利用注浆、注水、注三相泡沫等综合快速治理技术,提高火区爆破、剥离、开采速度,保证矿区露天矿的生产安全。     

平朔东露天矿不同特性火区的针对性治理方法研究

以平朔东露天矿火区治理为基础,分析了平朔东露天矿火区的特性,并有针对性地提出了对不可见空洞火区、可见明火巷道空洞火区及高温虚量钻孔的治理措施,通过采用注水、注浆、注三相泡沫配合骨料充填,多阶段降温及隔离带降温等方法进行治理。经过为期3个月的治理,平朔东露天矿的火区得到了明显的改善,火区温度持续下降,有害气体浓度持续减小,取得了较好的治理效果。     

露天矿松散介质火区灭火降温技术研究与应用

为解决松散介质高温区对露天矿生产、安全和环境造成极大的威胁和破坏这一难题,结合松散介质高温区多孔介质高热容立体高温等特性,采用加压多点灌注两相泡沫技术对这类火区进行快速灭火降温。将该技术应用于东露天矿1260平盘松散介质高温火区的治理中,并对该技术的参数、应用工艺、火区治理流程以及封孔、分配设备进行了优化和设计。通过灭火效果考察可知,采用该技术对火区的治理取得了较好的效果,达到了东露天矿火区降温和爆破要求。     

压注两相泡沫技术在新疆煤田火区高温钻孔降温中的实验研究

新疆乌尊布拉克火区高温钻孔热量呈立体分布,而传统的注水措施对水的利用率较低,其对钻孔中上部高温降温效果较差。基于此,提出采用加压灌注两相泡沫技术对高温钻孔进行整体灭火降温,发挥两相泡沫的灭火降温优势,实现对高温钻孔高效率全方位治理。通过在新疆乌尊布拉克火区选取靶区进行现场实验表明:在采用压注两相泡沫技术对高温钻孔进行治理时,降温效率更高,其对水利用率是直接注水方式的3.95倍。     

平朔东露天矿高温爆破孔降温技术分析

根据平朔东露天矿高温爆破孔内部特点,首次将爆破孔分为正常孔、虚量孔和空洞孔。在分析高温孔产生原因的基础上,针对不同钻孔类型提出最适宜的降温技术措施,保证了正常的爆破作业,同时也分析了降温技术的时间效应,对国内露天煤矿处理高温钻孔具有普遍的参考价值和借鉴意义。     

东露天矿大范围高温火区降温技术研究

针对东露天矿开采过程中,爆破钻孔下方存在大范围高温火区,使得钻孔无法装药的现状,分析了高温火区产生的原因,采用温度场反演方法指出最佳灭火介质灌注点,选择了适宜的灭火降温技术,成功将高温火区温度降低到60℃以下,为露天煤矿高温火区的治理提供了参考。     

露天矿火区爆破灭火降温方法的探讨

根据大峰露天煤矿的生产实践,总结了几种火区爆破中常用的灭火降温方法,并介绍了其适用条件、操作方法、特点及要求,在国内露天矿同类问题的解决上,具有很好的参考价值和借鉴意义。     

露天矿小窑空洞火区治理技术

小煤窑采空区空洞火区是威胁露天矿生产安全和人员设备安全的重大隐患之一,而传统的灭火技术难以有效地解决采空区空洞火区立体空间高位火源快速灭火问题。针对安家岭露天矿1315干道边坡火区特点,从空洞火区快速灭火降温和防复燃角度出发,分析注浆技术、高倍阻化泡沫技术和粉煤灰改性材料快速填充技术的特点并优化技术工艺参数,将这些技术综合应用到安家岭露天矿1315空洞火区的治理之中,成功治理了火区,取得了较好的火区治理效果。     

复采综放工作面火灾原因分析及防灭火措施

分析了红会一矿复采综放工作面的3起火灾事故,通过研究分析堵漏风、直接消除可燃物、注水降温、布孔注浆和注氮防灭火的作用、缺点及适用条件,提出了小煤矿采空区采取复喷复灌堵漏、预插管火区预测预报、爆破弱化区域采前预灌等预防小煤矿破坏区自燃措施,以及消火道或钻孔高位注浆、喷浆包帮包底堵漏消除工作面内火灾、预埋管低位注浆、高位注氮消除采空区火灾的治理方案。     

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     

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.     

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     

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     

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.