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提高含砷金精矿二段焙烧-氰化工艺金浸出率的试验研究薛光1,王永新2,薛元昕3(1.山东省烟台市人民武装警察部队黄金第七支队2.河北怀来宏达矿业有限公司3.烟台职业学院)摘 要:在试验研究基础上,提出了一种提高含砷金精矿二段焙烧-氰化浸出工艺金浸出率方法.试验结果表明,含砷金精矿经一段焙烧(450~500℃)除砷后,加入一定量的添加剂SR,再进行二段焙烧(630~650℃),然后经稀硫酸除铜后进行氰化浸出,可使金的氰化浸出率提高4.65%.该方法可获得较好的经济效益和社会效益.关键词:含砷金精矿； ......
on the roasting reaction. The reaction mechanism changes greatly as the temperature varies. A two-stage roasting process is favorable for the roasting reaction, and a recovery ratio of 96.51% is obtained through this two-stage roasting method. The chromium residue yielded from this method is quite little, only one third of the product. Moreover, the component of Fe in the residue is as high as 54.28......
Process intensification of fine coal separation using two-stage flotation columnGUI Xia-hui(桂夏辉)1, LIU Jiong-tian(刘炯天)2, CAO Yi-jun(曹亦俊)2, CHENG Gan(程敢)3, ZHANG Hai-jun(张海军)2, WANG Yong-tian(王永田)2(1... as the separation equipment for fine mineral due to its high selectivity. However, this device may be unsuitable for the coarse particle flotation and has high handling ability. A two-stage flotation column......
ferrochrome. The reaction mechanism changed greatly as the temperature varied. A two-stage roasting process was favorable for the roasting reaction, and a chromium recovery rate of 97.06% was obtained through this two-stage roasting method. The chromium residue yielded from this method was only 1/3 of the product. Moreover, the component of Fe in the residue was as high as 55.04%. Therefore, it can......
Effect of two-stage aging on superplasticity of Al-Li alloy LUO Zhi-hui(罗智辉), ZHANG Xin-ming(张新明), DU Yu-xuan(杜予晅), YE Ling-ying(叶凌英) School of Materials Science and Engineering, Central South University, Changsha 410083, China Received 28 July 2006; accepted 15 September 2006 Abstract: The effect of two-stage aging on the microstructures and superplasticity of 01420 Al-Li alloy......
metals extraction and recovery from hazardous electroplating sludge waste via ultrasonically enhanced two-stage acid leaching [J]. Journal of Hazardous Materials, 2010, 178(1-3): 823-833. DOI: 10.1016... J. Cent. South Univ. (2020) 27: 3567-3580 DOI: https://doi.org/10.1007/s11771-020-4569-6 Recovery of lead and silver from zinc acid-leaching residue via a sulfation roasting and oxygen-rich......
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. The corresponding relationship between the value of [1-(1-α)1/3] and the roasting time is shown in Fig. 12; there is a good linear correlation between the two variables. The results further indicate...J. Cent. South Univ. (2017) 24: 1544-1550 DOI: 10.1007/s11771-017-3559-9 Kinetics of roasting potash feldspar in presence of sodium carbonate LIU Jia-nan(刘佳囡)1, ZHAI Yu-chun(翟玉春)1, 2, WU Yan(吴艳)1......
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degree approaching to natural magnetite concentrate pellet fired at 1000 °C. Besides, two kinds of pellets displayed quite different roasting characteristics. When preheated at the same temperature... on roasting properties of two kind of magnetite pellet, as well as reveals design of parameters of induration equipment of the two kinds of pellet, and providing right selections of thermal operation model. 2......
