共查询到20条相似文献,搜索用时 62 毫秒
1.
以钼尾矿为主要原料,采用常压烧结法制备钼尾矿微晶玻璃。研究了烧成温度对微晶玻璃性能的影响,研究表明,随着烧成温度的升高,微晶玻璃的抗折强度、抗压强度和体积密度均呈现先增大后减小趋势,收缩率呈现持续增大趋势,耐酸碱的质量损失率均呈现先减小后增大的趋势。微晶玻璃制备的最佳工艺条件为:烧成温度为1 000℃,保温120 min。在此工艺条件下,该微晶玻璃的主晶相为莫来石相,抗折强度为96.2 MPa,抗压强度为160.4 MPa,收缩率为14.27%,体积密度为2.90 g/cm3,耐酸质量损失率为0.21%,耐碱质量损失率为0.23%。研究成果为钼尾矿的综合利用提供了一条新途径。 相似文献
2.
3.
4.
5.
钨尾矿微晶玻璃的组成及制备 总被引:6,自引:1,他引:6
介绍了以钨尾矿为主要原料制备微晶玻璃的方法 ,研究了钨尾矿微晶玻璃的组成。用 X射线衍射和扫描电镜分析了微晶玻璃的析晶相及显微结构 ,同时测定了该材料的物化性能 相似文献
6.
7.
以垣曲铁尾矿为主要原料,采用烧结法制备SiO2 Al2O3 CaO系黑色微晶玻璃。主要阐述了铁尾矿黑色微晶玻璃的制备工艺,根据生产过程中出现的问题及解决办法,总结出一套实际生产可行的制备工艺,进一步克服了黑色微晶玻璃制备工艺难、板材成型难、板材气孔率高等难点。最终,通过一系列实际生产工艺改进,成功制备出气孔少且小、板材颜色纯正的铁尾矿黑色微晶玻璃。 相似文献
8.
9.
铝土矿尾矿微晶玻璃研制 总被引:4,自引:0,他引:4
分析了铝土矿尾矿的化学组成,并以铝土矿尾矿为主要原料利用烧结法制备出了微晶玻璃。利用DSC、XRD及SEM等研究了铝土尾矿微晶玻璃的热学特性、相组成以及微观形貌。研究结果表明,1000℃烧结可获得主晶相为硅灰石、晶粒呈针状物、性能良好的微晶玻璃。 相似文献
10.
11.
12.
13.
《Minerals Engineering》2000,13(6):609-622
Thermal treatments of two feldspars (FELA and FELB) have been performed in air at various temperature, ranging from 200°C up to 800°C. The influence of this heating on the efficiency of cadmium removal from aqueous solutions by immersing these two feldspars into these solutions is presented. Sorption tests carried out in batch-type reactors have demonstrated that cadmium removal efficiency of quenched minerals is strongly dependent on heating temperatures. Results of textural, structural and composition modifications due to heating are discussed combining several analytical techniques (BET, XRD, MEB-WDS and XPS). Effects of heating on sorption activity and exchange sites are valued on the basis of these data combined with direct measurements performed by ICP-AES on the species released from feldspar in aqueous solutions. 相似文献
14.
V. A. Chanturia E. L. Chanturia I. Zh. Bunin M. V. Ryazantseva E. V. Koporulina A. L. Samusev N. E. Anashkina 《Journal of Mining Science》2016,52(4):778-792
The article gives a report on integrated experimental research into targeted change of chemical and phase composition of surface and increase in contrast of physicochemical, electrical and electrochemical properties of tantalite, columbite and zircon under treatment by acid product of water electrolysis—anolyte (pH < 5) and by muriatic solution (HCl, pH 3–3.5). The X-ray photoelectron spectroscopy, high resolution spectroscopy and chemical and electrophysical techniques reveal the mechanism of structural–chemical surface transformation of tantalite, columbite, zircon and feldspar under leaching in acid solutions; this surface transformation mechanism consists in activation of dissolving of iron- and silicate-containing surface films and high-rate oxidation of iron atoms in surface layer of tantalite and columbite, with transition of Fe(II) to Fe(III) and surface destruction of zircon, with formation of oxygenvacant defects of SiO3 2? and SiO2 0 type under influence of anolyte. 相似文献
15.
以稀选尾矿和粉煤灰为主要原料,添加适量的石英砂、纯碱等化工原料,经混料、熔制、成型、热处理等工艺过程制得以辉石为主晶相的微晶玻璃。利用DTA、XRD、SEM等测试手段分别研究了核化温度及晶化温度对微晶玻璃力学性能的影响。研究表明:不同的核化温度及晶化温度对稀选尾矿—粉煤灰微晶玻璃主晶相影响较小,但对性能影响较大。最佳的核化、晶化温度分别为720℃和850℃,在此温度下得到的微晶玻璃抗折强度为197MPa。微晶玻璃微观组织结构致密,晶粒细小而分布均匀,尺寸范围为100~300 nm,以球状晶居多。 相似文献
16.
长石-石英浮选分离工艺研究 总被引:5,自引:0,他引:5
介绍了山东某矿钾、钠长石的浮选分离试验,并对其机理进行了分析.采用HF法加上粗精矿再磨再选,可以得到合格的长石、石英精矿,满足用户的质量要求. 相似文献
17.
《Minerals Engineering》2006,19(11):1216-1217
In this study, recovery of feldspar from trachyte by flotation was studied. A feldspar concentrate containing 5.72% K2O, 5.33% Na2O, 0.321% Fe2O3 and 0.080% TiO2 was obtained from a feed containing 5.20% K2O, 3.37% Na2O, 1.778% Fe2O3 and 0.253% TiO2 with an overall recovery of 22.4% by weight. 相似文献
18.
针对辽宁某地钾长石的特点,设计了一条绿色化综合利用工艺流程。采用Na2CO3中温焙烧,在较低温度下破坏钾长石的结构。碱溶焙烧熟料得到Na2SiO3溶液和K、Na、Al的富集渣。碳分Na2SiO3溶液制取白炭黑。酸化K、Na、Al的富集渣,经水浸、过滤得到白炭黑和含K、Na、Al的溶液。Na2CO3沉铝得到Al(OH)3与K、Na分离。Na2SO4、K2SO4循环至一定浓度后分步结晶得到Na2SO4和K2SO4晶体。可采用CO还原Na2SO4制得Na2S。整个工艺流程实现了Si、K、Na、Al的综合利用,无废弃物排放。 相似文献
19.