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Effect of La2O3 on Microstructure and Transmittance of Transparent Alumina Ceramics Zhang Hongwei1,Zeng Zhijiang1,Yang Qiuhong1,Xu Jun2,Ding Jun1 (1.School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China;2.Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China) Abstract:Optically transparent alumina ceramics were......
; 明矾石加压酸浸工艺流程 Fig. 1 Flow chart of pressure acid-leaching of alunite ore 2 实验 2.1 实验原料 实验原料来自福建紫金山选铜尾矿中浮选得到的明矾石尾矿,矿样粒度分析结果见表1,其主要化学成分和XRD谱分析结果分别见表2和图2所示.实验所用硫酸为分析纯级98%H2SO4(质量分数),用水均为去...下钾,铝的浸出率 Table 3 Leaching rate of Al and K under different conditions 在浸出温度220 ℃,浸出时间180 min,酸矿比3:1,搅拌速率600 r/min的条件下,考察不同初酸含量对钾,铝浸出率的影响,结果如图4所示. 图3 酸矿比对铝,钾浸出率的影响 Fig. 3 Effect......
Laser Modification of Plasma Sprayed Alumina Coating陶曾毅,王爱华,朱蓓蒂,邓世均,程旭东,傅江民摘 要:<正> An alumina coating was developed on mildcarbon steel by plasma spraying and then modifiedby laser remelting.Some characteristics of plasmasprayed ceramic coating before and after laserremelting,such as microstructure,wear resistance,heat shock resistance,hot......
J. Cent. South Univ. (2012) 19: 77-84 DOI: 10.1007/s11771-012-0975-8 Leaching kinetics of low-grade copper ore with high-alkality gangues in ammonia-ammonium sulphate solution LIU Zhi-xiong(刘志雄)1, 2... Engineering, Jishou University, Jishou 416000, China ? Central South University Press and Springer-Verlag Berlin Heidelberg 2012 Abstract: The leaching kinetics of low-grade copper ore with high-alkality......
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Pressure acid leaching of zinc sulfide concentrate GU Yan(古 岩), ZHANG Ting-an(张廷安), LIU Yan(刘 燕), MU Wang-zhong(牟望重), ZHANG Wei-guang(张伟光),DOU Zhi-he(豆志河), JIANG Xiao-li(蒋孝丽) Key...; accepted 30 December 2009 ____________________________________________________________________________________________ Abstract: Effects of particle size of the zinc sulfide concentrate, leaching......
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formation characteristic, microstructure, elemental distribution and alumina leaching property of clinkers were studied by XRF, XRD and SEM-EDS. The results show that B2O3 promotes the formation of 2CaO... property of 20CaO·13Al2O3·3MgO·3SiO2[J]. The Chinese Journal of Nonferrous Metals, 2009, 19(2): 378-382. [20] WANG Bo, SUN Hui-lan, GUO Dong, ZHANG Xue-zheng. Effect of Na2O on alumina leaching property......
J. Cent. South Univ. (2020) 27: 1703-1713 DOI: https://doi.org/10.1007/s11771-020-4401-3 Oxygen pressure acid leaching of artificial sphalerite catalyzed by Fe3+/Fe2+ self-precipitation TIAN Lei(田磊... Abstract: The mechanism of oxygen pressure acid leaching of sphalerite catalyzed by Fe3+/Fe2+ self-precipitation was investigated in this study. Artificial sphalerite was fabricated with varying amounts......
is decreased by 30 °C when the molar ratio of Na2O to Al2O3 increases from 0 to 0.4 determined by DSC. The alumina leaching property of clinker increases obviously with the increase of Na2O addition. Key words... promote the alumina leaching property of calcium aluminate slag, but the mechanism was not proposed. In the C-A-S system, the phases in the sintered clinker referred to alumina production consist......
