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叙述了非绿柱石铍矿生产工业氧化铍的工艺,特别是高氟铍矿生产工业氧化铍的方法,介绍了水口山工业氧化铍的生产状况。 相似文献
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《稀有金属》2015,(5)
目前在工业上,铍金属主要是从含铍矿物中提取,主要是绿柱石、硅铍石、羟硅铍石等。随着铍矿产资源的日益枯竭,必须寻找其他替代铍矿的资源,使铍矿物的使用范围继续扩大。然而,这些替代铍矿一般含有大量的萤石,矿石中氟含量很高;在生产工业氧化铍的冶炼过程中,通常要求矿石中氟铍比小于10%,矿石中的氟含量高,严重影响工业氧化铍的质量和冶炼回收率。因此如何脱除矿石浸出液中的氟,消除氟对冶炼过程的影响,是高氟铍矿冶炼过程的难点。本文对高含氟铍矿石浸出液净化工艺进行研究,提出以共沉淀法对含铍浸出液进行净化。研究了在沉淀过程中,终点p H、温度、时间以及硫酸铵浓度等因素的影响;共沉淀条件为:p H=3.5~4.0、温度95℃、时间6 h、沉淀剂氨水浓度10%,沉淀经0.5 mol·L-1的硫酸铵溶液浆化洗涤;在此过程中,杂质铝、氟、铁的沉淀率在97%以上,铍的损失率在10%左右。 相似文献
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成泉辉 《稀有金属与硬质合金》2004,32(3):49-52
分析了高氟铍矿中的氟在工业氧化铍冶炼中的行为和影响,提出了减少和消除这些不利影响的措施,以降低工业氧化铍冶炼成本,提高金属回收率.减少环境污染。 相似文献
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雷湘 《有色金属(冶炼部分)》2019,(10):30-32
高氟铍矿石中的成分复杂,其中氟、磷、硅、铝、铁等杂质在传统法工艺中对氧化铍的回收率及质量影响很大;萃取法生产氧化铍过程中,P204对铍浸出液中的阳离子进行交换,浸出液中的阴离子氟、硅、磷等基本不被萃取;利用阳离子在P204中的萃取顺序,将铁还原成二价铁,并在还原气氛中减少铝铁与铍同萃机会。同时高氟铍矿石中的氟与铝的络合作用可抑制铝的萃取,萃入有机相中的铝铁经洗涤后基本可除去。洗后的有机相经反萃、水解沉淀、煅烧得到合格的工业氧化铍。 相似文献
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铍的生产现状与应用开发 总被引:4,自引:0,他引:4
刘世友 《稀有金属与硬质合金》1998,(4):56-61
介绍了世界铍矿资源和储量的分布情况及主要厂家的生产现状。详细地叙述了金属铍、铍铜、铍合金和氧化铍的应用与开发。分析和预测了2000年铍的市场供需情况。 相似文献
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Thermodynamics of Modifying Effect of Rare Earth Oxide on Inclusions in Hardfacing Metal of Medium—High Carbon Steel 总被引:1,自引:1,他引:0
The modifying effect of rare earth(RE)oxide on inclusions in hardfacing metals of medium-high carbon steel was investigated by means of thermodynamics,The thermodynamic analsys for inclusion formation shows that RE oxide can be reduced to RE element by carbon,then the RE element can react with oxygen and sulfur to form the RE oxide,RE sulfide and RE oxide-sulfide in hardfacing molten pool.The deoxidization and the desulphurization can be carried otu and the liquid metal can be purified.In addition,RE oxide can also react with sulfur to form RE oxide-sulfide dirdctly.Therefore,the harmful effect of sulfur can be decreased. 相似文献
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TherearemanymethodsofaddingREintosteelsurface[1],ofwhichthedifusionpenetrationmethodisanewone.Thelasertreatedsurfacesofbotht... 相似文献
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钢中稀土微合金化作用与应用前景 总被引:30,自引:8,他引:22
低氧硫钢中室温下稀土固溶量达10-5~10-4,MnS夹杂完全变质后,稀土固溶量显著增加,酸溶铝,Nb,Ti均有利于提高钢中稀土固溶量.固溶稀土偏聚在晶界,减少硫、磷在晶界的偏析,渗碳体中固溶稀土多于铁素体.稀土和碳相互作用,减少珠光体数量、珠光体片间距和渗碳体厚度,细化珠光体组织,提高硬度.稀土对钢的强度影响具有两面性,稀土能提高锰碳钢的屈强比和有利于改善低合金高强度钢的强韧性.稀土在低合金高强度钢中有广泛的应用前景,发展具有中国资源优势的稀土微合金钢有重要的意义. 相似文献
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Effects of RE on Microstructures and Mechanical Properties of Hot-Extruded AZ31 Magnesium Alloy 总被引:4,自引:2,他引:4
Effects of rare earth (RE) additions on microstructure and mechanical properties of the wrought AZ31 magnesium alloy were investigated. The results show that, by adding 0.3%, 0.6% and 1.0% RE elements, the as-cast microstructure can be refined, and the as-cast alloys‘ elongation and tensile strength can be improved. After extrusion, the alloy with 0.3 % and 0.6% RE additions obtain a finer microstructure and the best mechanical properties, but the alloy with 1.0% RE addition has the coarse A1-RE compound particles in grain boundaries which decreased elongation and tensile properties. Usually, Rare earth (RE) elements were used to improve the creep properties of aluminium-containing magnesium pressure die cast alloys at elevated temperatures. In this paper, it is also found that the high temperature strength of extruded materials can be increased by RE elements additions. 相似文献
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The effects of RE (rare earth) oxide on viscosity of mold fluxes were investigated with a rotary viscometer. The results show that : (1) The viscositv of mold fluxes is remarkably inereased by RE oxide addition, especially when the mass fraction of RE oxide is more than 10%. (2) By addition of RE oxide, precipitation of the insohlble particles with high melting point from the molten slag with the decreasing of the temperature leads to the inerease of viscosity. Viscosity curve shows that RE oxide is soluble in some extent in mold fluxes. When RE oxide is in a state of supersaturation, the existence of insoluble particles also makes the viscosity of mold fluxes increase. (3) Not only the viscositv of nlold fluxes can be reduced, but also the capacity to dissolve and absorb RE oxide can be increased by Li2O, B2O3 and BaO. However, the contents of Li2O, B2O3, and BaO should be controlled to suitable levels. (4) The solidification temperature of mold fluxes can be increased by the addition of RE oxide, which is unfavorable to heat transfer and luhrication of mold fluxes between steel shell and mold. 相似文献
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摘要:稀土(RE)微合金化是开发高品质模具钢的重要手段之一。采用稀土渣系结合电渣重熔实现H13钢铸锭的稀土添加,重点对比研究了稀土氧化铝渣系和氧化铝渣系所制备H13钢铸锭的成分、组织及夹杂物特征,揭示了稀土氧化铝渣系对于H13钢铸态组织的稀土改性作用及机制。结果表明,采用稀土氧化铝渣系或稀土氧化钙渣系均可制备稀土质量分数约0.01%的H13钢铸锭,并分别将S质量分数从电极(原料)的0.01%降低至铸锭的0.005%和0.002%。稀土氧化铝渣系的H13钢铸锭中晶界处有稀土La富集,晶内分布尺寸1~2μm的近球形稀土硫氧化物La2O2S(与基体具有4.7%的较低界面错配度)。相比氧化铝渣系,稀土氧化铝渣系将H13钢铸态组织的二次枝晶平均尺寸从109.6μm减少到84.9μm,液析碳化物和夹杂物平均尺寸从5.1μm减少到3.1μm, 从而改善稀土H13钢铸态组织的均匀性。 相似文献
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StudyontheInteractionbetweenRareEarthandCarboninHighCarbonSteel¥LinQin(林勤),FuTingling(付廷灵),YuZongsen(余宗森),YeWen(叶文)(Universit... 相似文献
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稀土处理钢保护渣的研究与应用 总被引:9,自引:0,他引:9
减少保护渣中的Na2O、SiO2而增加Al2O3,以减少RExOy的产生;增加B2O3组元作助熔剂,并且提高溶解RExOy的能力.试验结果表明,浇铸09CuPTiRE钢保护渣使用状况良好,铸坯表面无纵裂纹等缺陷,没有发生漏钢事故;熔渣中RExOy含量3.4%,99%为玻璃相. 相似文献