以铁尾矿为调质剂改善高炉渣成纤性研究

为了改善高炉渣的成纤性能,采用FactSage热力学模拟和试验测定相结合的方法,研究了以铁尾矿为调质剂,对调质渣黏度及均质化时间的影响规律。结果表明:随着铁尾矿的加入,调质渣由短渣特性转变为长渣特性,调质渣黏度系数升高,适宜的成纤温度范围变大,但熔化性温度出现先降低后升高的趋势;在高炉渣制取矿渣纤维过程中掺加3%~15%的铁尾矿既有利于改善高炉渣的成纤性能,为优化高炉渣制备矿渣纤维工艺,提高生产效率,实现节能高效生产提供理论支撑,同时还能开辟铁尾矿资源化的新途径。     

镍铁冶炼高温炉渣制备造纸用无机纤维

以缅甸达贡山红土镍矿为矿石原料,利用其冶炼时产生的高温炉渣制备造纸用无机矿物纤维,试验结果表明,在冶炼时添加的石灰量为矿石质量的10%,制纤时炉渣温度为1 500~1 600 ℃、离心成纤机转鼓表面线速度为10 835 m/min、高温炉渣流量为2 800 kg/h条件下,高温炉渣成纤率可达75.30%~75.38%。用制得的无机矿物纤维代替部分植物纤维试制瓦楞芯纸和箱板纸,结果表明,两种纸品中无机矿物纤维最大使用量分别可达35%和40%（按无机矿物纤维与植物纤维的质量比计）。研究成果为镍铁冶炼渣的高效利用提供了新途径     

用镍铁炉渣制备矿渣纤维

红土镍矿火法冶炼镍铁合金过程中,会排出大量镍铁炉渣,当前,主要采用堆存、填埋等方式处理镍铁炉渣,不仅占用大量土地资源,而且污染环境。为此,以红土镍矿冶炼过程产生的高温熔融炉渣制备镍铁矿渣纤维。结果表明,在石灰添加量为16%、炉渣流量为4 200 kg/h、制纤温度为1 540℃、负压机风压为0.8 MPa、离心成纤机转速为4 000 r/min时,制得的纤维吸油率为5.2%、吸持沥青能力为自身质量的10.94倍,可以满足路用纤维材料的技术要求。镍铁矿渣纤维呈圆柱状,且表面缺陷较多。对镍铁矿渣纤维性能分析表明,镍铁矿渣纤维属于玻璃态非晶体物质,其表面对空气中二氧化碳分子和水分子的优先吸附和表面缺陷使其具有较好的沥青吸持能力。研究结果为镍铁矿渣资源化再利用提供了一种途径。     

含钛高炉渣选择性析出分离技术研究进展

简述了攀钢含钛高炉渣综合利用研究现状，指出了选择性富集、长大和分离钙钛矿技术是提取渣中钛元素、达到含钛高炉渣综合利用目的最有效途径之一，并分析了影响该技术的相关因素。     

含钛高炉渣综合利用与钛组分析出技术的进展

对含钛高炉渣综合利用意义、研究现状进行了概述,分析了含钛高炉渣利用过程中存在的主要问题。介绍了选择性析出理论及其在含钛高炉渣综合利用研究方面的新进展,提出采用选择性析出技术是解决含钛高炉渣综合利用的有效途径。     

含钛高炉渣综合利用与钛组分析出技术的进展

对含钛高炉渣综合利用意义、研究现状进行了概述,分析了含钛高炉渣利用过程中存在的主要问题.介绍了选择性析出理论及其在含钛高炉渣综合利用研究方面的新进展,提出采用选择性析出技术是解决含钛高炉渣综合利用的有效途径.     

直埋热力管道的热补偿和方形补偿器

随着城市集中供热的普及，热力管道直埋敷设技术日益成熟、并迅速推广。在热力管道直埋敷设技术中，除了保温材料的选择有一些特定要求外，管道热伸缩的补偿问题是影响敷设成败的重要因素。对热力管道直埋敷设的热伸缩问题，有两种处理方法，一种是无补偿安装，另一种是有...     

化学成分对高炉渣微观结构影响的研究现状

高炉渣的化学成分对其微观结构具有重要影响,改变高炉渣的化学成分,高炉渣的微观结构也发生改变。本文综述了碱度、MgO/Al_2O_3比值及MgO、Al_2O_3化学成分对高炉渣微观结构的影响,高炉渣主要为硅氧四面体相互连接成的网络结构,Ca~(2+)和Na~+等离子进入到炉渣网络结构中破坏了硅酸盐网络结构,促使硅酸盐中简单结构单元增多;Al~(3+)、Ti~(4+)和B~(3+)等离子在不同环境中对高炉渣微观结构起到不同作用,既可以使炉渣网络结构复杂化,也可以使炉渣网络结构转变为较小的结构单元。并指出了关于化学成分对中钛渣微观结构影响是中钛渣的研究重点。     

高炉渣的化学成分对其微观结构影响的研究现状

高炉渣的化学成分对其微观结构具有重要影响,改变高炉渣的化学成分,高炉渣的微观结构也发生改变。本文综述了碱度、MgO/Al_2O_3比值及MgO、Al_2O_3化学成分对高炉渣微观结构的影响,高炉渣主要为硅氧四面体相互连接成的网络结构,Ca~(2+)和Na~+等离子进入到炉渣网络结构中破坏了硅酸盐网络结构,促使硅酸盐中简单结构单元增多;Al~(3+)、Ti~(4+)和B~(3+)等离子在不同环境中对高炉渣微观结构起到不同作用,既可以使炉渣网络结构复杂化,也可以使炉渣网络结构转变为较小的结构单元。并指出了关于化学成分对中钛渣微观结构影响是中钛渣的研究重点。     

铜绿山XI矿体古代炉渣冶炼冰铜说

铜绿山古铜矿冶遗址是我国最重要的矿冶遗迹，以往的研究认定其开采的是氧化矿石，使用的冶炼技术是氧化矿石直接还原冶炼成铜。这一结论主要是根据铜绿山矿区赋存有大量的氧化矿石，考古发掘的古矿井位于氧化带并出土有氧化矿石等事实获得的，并因用铜绿山氧化矿石进行的模拟实验成功地炼出铜而得到强化。为复原冶炼技术对ＸＩ矿体上的炉渣堆积进行的发掘，获得了炼炉和大量层位清楚的炉渣样品，但对这些样品的分析是在冶炼氧化矿石的结论之下进行的，最能反映冶炼性质的炉渣分析数据未被充分利用来确定矿石和产品类别。本文根据铜冶金基本原理对ＸＩ矿体炉渣所代表的冶炼过程的性质提出了疑问，进而建立通过炉渣分析判定冶炼过程的方法，并以此方法配之以模拟实验对铜绿山ＸＩ矿体和动力科仓库院内的古炉渣进行了研究，认定前者是冶炼品位为６５％的冰铜的炉渣，后者才是真正的直接冶炼氧化矿石成铜的炉渣。     

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.     

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     

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