共查询到20条相似文献,搜索用时 46 毫秒
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平果铝土矿中伴生有14种以上的稀有元素,其中含量较高的有镓、钒、钛、钽、铌、钪和稀土.分析了主要稀有元素在铝土矿中的存在状态、综合利用前景和经济价值,提出平果铝厂投产后就着手研究回收镓、钒、查定母液和赤泥物质组成,对赤泥选钛、铁。选钛是钪、钽、铌综合回收的重要途径.对含稀土炭质岩、矿和离子吸附型稀土矿床进行普查。 相似文献
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针对平果铝土矿的特点,在分析比较了近年来所进行的用平果那豆铝土矿生产氧化铝的工艺和物相研究结果之后,以拜耳法工艺为基础,提出了两段溶出新工艺,即一段常规不完全溶出,赤泥分级,粗赤泥二段强化溶出。它适应矿石溶出性能较差的特点,在提取 相似文献
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列举了近年来国内外从高铁铝土矿赤泥中回收铁的各种工艺方法,并对各种方法进行了技术经济分析对比,说明用物理选矿方法比用冶金方法更为合理。对平果铝土矿,应根据其矿物学特性和含铁较低的特点,采用先低温焙烧,再拜耳法溶出,赤泥用脉动高梯度磁选的方法来回收其中的铁矿物,所得合格铁精矿可作高炉炼铁原料,尾渣进一步回收碱、氧化铝和其他有价元素,以实现赤泥零排放 相似文献
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本文结合山东铝厂实践,对赤泥的性能、赤泥综合利用途径、赤泥堆场管理、赤泥堆场稳定性以及赤泥附液渗透污染等问题作了扼要论述。 相似文献
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国内赤泥综合利用技术发展及现状 总被引:3,自引:0,他引:3
针对氧化铝行业日益严重的赤泥排放及堆存问题,本文着重介绍了国内赤泥综合利用领域的技术研究现状,剖析了取得的成果及存在的问题,展望了赤泥综合利用技术的发展前景. 相似文献
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“赤”色警报——匈牙利赤泥事件给中国敲响警钟 总被引:1,自引:0,他引:1
匈牙利赤泥事件为我国乃至全球敲响警钟。我们在为这次工业意外事故感到悲愤之时,更应思考如何最大限度减少赤泥的产生量和危害。适时加快开展赤泥的综合利用才是正道。 相似文献
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模具渗硼工艺及其发展应用 总被引:4,自引:0,他引:4
渗硼是提高模具使用寿命的重要途径,是在金属表面形成高硬度的金属硼化层,显著提高其耐磨性,且具有良好的耐热性和耐蚀性。近年来,随着渗硼工艺逐步改进和完善,已发展了复合渗、多元共渗及低温渗硼工艺,取得了良好的经济效果。 相似文献
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A. A. Babakov 《Metal Science and Heat Treatment》1967,9(10):764-770
Conclusions Highly alloyed steels and alloys are produced in conformity with GOST or technical specifications in thick and thin sheets, beams and channels, bars, hot-rolled and cold-rolled pipe, and rod. Castings are produced in the specialized plant of the Ministry of Chemical and Petroleum Machine Building.The technology of welding stainless steels and alloys is given in [15] and [16].TsNIIChERMET. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 10, pp. 43–50, October, 1967. 相似文献
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A. Yu. Tsivadze G. V. Ionova V. K. Mikhalko 《Protection of Metals and Physical Chemistry of Surfaces》2010,46(2):149-169
The possibility of using unique properties of lanthanides in the nanotechnology is demonstrated. The origination of linear
and nonlinear optical properties of lanthanide compounds with phthalocyanines, porphyrins, naphthalocyanines, and their analogs
in solutions and condensed state and the prospects of obtaining novel materials on their basis are discussed. Based on the
electronic structure and properties of lanthanides and their compounds, namely, optical and magnetic characteristics, electronic
and ionic conductivity, and fluctuating valence, molecular engines are classified. High-speed storage engines or memory storage
engines; photoconversion molecular engines based on Ln(II) and Ln(III); electrochemical molecular engines involving silicate
and phosphate glasses; molecular engines whose operation is based on insulatorsemiconductor, semiconductor-metal, and metal-superconductor
types of conductivity phase transitions; solid electrolyte molecular engines; and miniaturized molecular engines for medical
analysis are distinguished. It is shown that thermodynamically stable nanoparticles of Ln
x
M
y
composition can be formed by d elements of the second halves of the series, i.e., those arranged after M = Mn, Tc, and Re.
Prospects of using lanthanide superconductors in nanotechnology are considered. 相似文献
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金刚石、CBN有序排列及择优取向工具的研发及应用 总被引:1,自引:0,他引:1
有序排列/择优取向超硬材料工具的技术创新,将广泛适用于电镀、树脂、陶瓷、金属结合剂制品工具中,使用超硬材料颗粒在结合剂中均匀排列并择优定向,以最大潜能的发挥超硬材料各个方面固有的特性。并针对不同的加工对象,有选择性的使用超硬材料各自不同的特性,从而使超硬材料工具将以经济、高质与高效的优势替代传统的超硬材料工具并将进入新兴的加工领域,为生产企业带来新的发展机遇。本文将对有序排列与择优取向技术的研究现状及其在不同的金刚石工具中的应用做一阐述。 相似文献
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V. Kulikovsky V. Vorlí?ek M. Stranyánek R. ?tvrtlík A. Kurdyumov 《Surface & coatings technology》2008,202(9):1738-1745
Hydrogen-free amorphous and nanocrystalline films were prepared by magnetron sputtering of the SiC or Si targets. Mechanical properties (hardness, elastic modulus, intrinsic stress) and film structures were investigated in dependence on the substrate bias and temperature. It was found that both hardness and elastic modulus of all amorphous a-SiC films prepared at different substrate temperatures and biases are always lower than those for bulk α-SiC single crystal while the hardness of partially crystalline SiC films is higher and the elastic modulus lower than those for α-SiC one. In contrast, both hardness and elastic modulus of all amorphous Si films are always lower than those for nanocrystalline Si films which show approximately the same value as the Si single crystal. 相似文献