共查询到19条相似文献,搜索用时 468 毫秒
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我国氧化钪的生产、应用及市场 总被引:9,自引:2,他引:7
综述了氧化钪生产的原料,生产工艺及设备、质量及产量,应用及市场等主要状况.根据氧化钪发展中存在的问题,进行讨论并提出了一些建议. 相似文献
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含钪铝合金的开发应用前景 总被引:14,自引:1,他引:13
介绍和分析了新型合金化元素钪对铝合金性能的影响和当前含钪铝合金的发展动向及应用前景,同时提出并讨论了我国含钪铝合金的发展战略,建议加速掌握以非高纯氧化钪为原料生产Al-Sc中间合金的工业技术和大力开展含钪铝合金的开发应用,尽快把我国含钪铝合金工业的生产体系建立起来。 相似文献
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《稀土》2015,(5)
文章重点介绍了白云鄂博氧化矿综合回收选矿工艺、铌钛铁合金冶炼工艺、高纯氧化钪萃取工艺、自产萤石精矿制备无水氢氟酸工艺、富钾板岩综合利用工艺、钍资源综合回收工艺等一系列新工艺。阐述了综合利用铌、钪、氟、钾、钍、钛等重要元素的关键技术。在国家"示范基地"平台和"引黄入白"管道输送工程的有力支持下,白云鄂博资源综合利用产业化项目顺利建成,该项目将实现综合回收铁、稀土、铌、钪、萤石和硫等六种精矿产品,其中铌精矿用于冶炼铌钛铁合金供生产高强度低合金钢、钪精矿用于提取高纯氧化钪供生产固体氧化物燃料电池和钪镁铝合金轻质材料、萤石用于生产氟有机化合物和无机化合物、氧化钍储备用于核能源开发。包钢将通过综合利用项目不断优化选冶工艺,延伸产业链,包括铌、钪、氟深加工产业链和钾综合利用产业链。项目的产业化对尾矿减排、环境保护、拓宽企业发展方向大幅度增加企业经济效益以及国家资源、能源安全等方面都具有重大意义。 相似文献
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从提炼金属钪废渣中分离提取高纯氧化钪工艺研究 总被引:2,自引:0,他引:2
本工艺选用P350从提炼金属钪废渣盐酸浸出液中分离提取高纯氧化钪。作者详尽讨论了萃取剂浓度、料液浓度、酸度及相比等因素对Sc萃取率影响以及料液酸度、P350浓度对Sc与31种杂质元素分离效果的影响,探索了Sc的沉淀工艺和灼烧工艺。在上述研究的基础上确立了P350萃取法从提炼金属钪废渣中分离提取高纯氧化钪工艺条件。采用单级萃取器、二级逆流萃取,共回收氧化钪18.5kg,产品质量稳定,工艺直收率大于95%,氧化钪纯度相对稀土杂质大于99.999%,相对31个金属杂质大于99.99%。 相似文献
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《中国稀土学报(英文版)》2023,41(5):764-770
Recovery of scandium from titanium white waste acid is an essential source of scandium. Simple and economical production of high purity scandium remains a challenge. A new extractant, N,N,N',N'-tetracyclohexyl-diglycolamide (TCHDGA), was synthesized, and the separation performance of scandium from impurity metal ions (Ti, Mn, Ba, Fe, Al and Mg) was investigated. The effects of mixing time, acid concentration and temperature on the scandium extraction were considered. The extraction mechanism was studied by infrared spectroscopy and the Equimole Series Method. Under optimized conditions, the extractant shows a strong affinity to scandium in the nitric acid medium and high extraction separation factors between scandium and these impurity metal ions. A process for the purification of scandium was established. The crude product obtained from titanium white waste acid, 95% purity scandium oxide, can be purified to 99.99% after only one step of extraction, scrubbing, and stripping. This technology is economical and straightforward and can realize the high-value recovery of scandium in the titanium white waste acid. 相似文献
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T. V. Molchanova I. D. Akimova K. M. Smirnov O. K. Krylova E. V. Zharova 《Russian Metallurgy (Metally)》2017,2017(3):170-174
The recovery of scandium from the wastes of the production of uranium, titanium, iron–vanadium, and alumina is studied. The applied acid schemes of scandium transfer to a solution followed by ion-exchange recovery and extraction concentration of scandium ensure the precipitation of crude scandium oxides containing up to 5% Sc2O3. Scandium oxides of 99.96–99.99% purity are formed after additional refining of these crude oxides according to an extraction technology using a mixture 15% multiradical phosphine oxide or Cyanex-925 + 15% tributyl phosphate in kerosene. 相似文献
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Yu. P. Kudryavskii 《Russian Journal of Non-Ferrous Metals》2011,52(5):420-422
A new production process for processing off-grade scandium oxide (98%) and scandium oxides 99.0 and 99.9 and the removal of
impurities from them with the acquisition of high-purity scandium oxide 99.99% is developed and tested. This process is based
on various solubilities of scandium formates and elements of impurities; it involves the dissolution of starting (98–99.8%)
Sc2O3 in HCl, the processing of the solution with NH4OH to pH = 5–7, filtering and washing the Sc(OH)3 precipitate with water, repulpation in formic acid, separating the precipitate of scandium formate from the mother liquor,
washing scandium formate with formic acid, and drying and calcinating it with the acquisition of Sc2O3 of the OS-99.99 grade. 相似文献
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采用二段萃取法从粗钪中分离提取氧化钪,当一段TBP萃取体系中羧酸盐型表面活性剂用量与氧化钪用量比为0.1∶1时,抑制稀土、钍、锆等杂质被萃取的效果显著。在二段TBP萃取体系中加入酸类络合剂用量与氧化钪用量比为0.15∶1时,可以显著抑制锆、铁等杂质被萃取。 相似文献
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钪的回收及提取现状 总被引:6,自引:0,他引:6
我国钪资源十分丰富,已探明的含钪矿物种类高达800多种。钪金属及其化合物具有许多优异性能,广泛应用于多种生产领域。然而,钪在自然界中主要以伴生矿物的形式较稀散地分布于其他矿物中,其分离和提取难度高、工艺复杂。归纳可回收钪的原料类型、简化回收及提取钪的工艺受到我国选矿工作者的普遍重视。介绍了主要赋钪矿物资源,根据处理含钪矿物时钪的富集走向不同,进一步将可回收及提取钪的物料归纳为原生矿、渣和处理液3类;分析了从不同类别含钪物料中回收及提钪的方法和步骤;列举了一些从具体含钪物料中回收及提取钪的研究和应用实例;根据国内外回收及提钪的现状,提出发展方向:兼顾主金属及其他有价金属的回收、尽量简化钪的回收和提取工艺、尽可能降低生产成本;注重联合多种方法来改善浸出和提钪工艺;寻求更多可回收钪的物料和回收、提钪的方法。 相似文献
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O. I. Get'man V. V. Panichkina V. V. Skorokhod 《Powder Metallurgy and Metal Ceramics》1996,34(11-12):595-599
The effect of additions of scandium oxide (1, 5, and 10 vol. %) on compaction during sintering of a disperse mixture of W-Sc2O3 powder at 2000°C has been studied. It has been found that the scandium oxide particles activate compaction during heating and conversely retard shrinkage of tungsten in the stage of isothermal soaking. The kinetics of compaction during sintering is determined by the geometry of the heterophase system. Depending on how much the tungsten and scandium oxide particles increase in size, the nature of thestructure changes markedly from matrix-statistical to statistical. 相似文献
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