共搜索到3479条信息，每页显示10条信息，共348页。用时：0小时0分0秒687毫秒
44280, Turkey Received 8 January 2014; accepted 19 May 2014 Abstract: The adsorption of copper ions was investigated using pyrolusite ore as a low-cost alternative adsorbent source. Pyrolusite, which contains mainly MnO2, is a manganese ore. The effects of the initial concentration of copper(II) ions, initial pH of solution, adsorbent dosage and particle size on the adsorption process were examined......
derivatives before(a) and after(b) adsorption of uranium 羟基-OH 出现的范围是在3200~3500 cm-1之间,因此,吸附铀后的物质在3498.87 cm-1处观察到的峰可能是-OH的峰,而3500.80 cm-1处的峰消失,1392.61 cm-1处的峰发生偏移,1483.26 cm-1处的峰移向1481.33 cm-1,其他位置的峰基本无明显变化...20 mL的条件下,调节pH值为2.0~6.0,在摇床中震荡反应6 h后,过滤,取上清液测定残余重金属浓度,为了消除和减少误差,每次测量重复3 次,取平均值,试验结果如图3所示. 图3 pH值对吸附铀的影响 Fig. 3 Effects of pH on adsorption of uranium 由图3可知,当pH值为2.0~4.0时,随着溶液中pH值的升高,吸附率迅速增......
J. Cent. South Univ. (2018) 25: 1813-1824 DOI: https://doi.org/10.1007/s11771-018-3871-z Opencast to underground iron ore mining method FAN Xiao-ming(范晓明)1, 2, REN Feng-yu(任凤玉)1, XIAO Dong(肖冬)1.... Key words: opencast-to-underground mining; transition mode; wedge-shaped transition mode Cite this article as: FAN Xiao-ming, REN Feng-yu, XIAO Dong, MAO Ya-chun. Opencast to underground iron ore......
J. Cent. South Univ. (2017) 24: 2266-2274 DOI: https://doi.org/10.1007/s11771-017-3637-z Extracting reaction mechanism analysis of Zn and Si from zinc oxide ore by NaOH roasting method CHEN Bing(陈兵... Central South University Press and Springer-Verlag GmbH Germany 2017 Abstract: The orthogonal test was used to optimize the reaction conditions of roasting zinc oxide ore with NaOH aiming......
J. Cent. South Univ. Technol. (2008) 15: 679-683 DOI: 10.1007/s11771-008-0126-4 Leaching kinetics of low grade zinc oxide ore in NH3-NH4Cl-H2O system WANG Rui-xiang(王瑞祥)1, 2, TANG Mo-tang(唐谟堂)1...; Abstract: The leaching kinetics of low grade zinc oxide ore in NH3-NH4Cl-H2O system......
J. Cent. South Univ. Technol. (2009) 16: 0936-0941 DOI: 10.1007/s11771-009-0156-6 Technological conditions and kinetics of leaching copper from complex copper oxide ore SUN Xi-liang(孙锡良)1, 2...; Abstract: The kinetic behavior of leaching copper from low grade copper oxide ore was investigated. The effects of leaching temperature, H2SO4......
Beneficiation of the gold bearing ore by gravity and flotationAlim Gül,Olga Kangal,Ayhan A. Sirkeci,Güven nalMineral Processing Engineering Department Istanbul, Faculty of Mines, Technical.... The choice among these processes depends on the mineralogical characterization and gold content of the ore. Recently, the recovery of gold using gravity methods has gained attention because of low cost......
J. Cent. South Univ. (2012) 19: 1092-1097 DOI: 10.1007/s11771-012-1114-2 Mathematical models and expert system for grate-kiln process of iron ore oxide pellet production (Part I): Mathematical models... distribution; oxidation degree distribution; iron ore oxide pellet 1 Introduction Iron ore pellet with high grade, good reducibility, homogeneous particle size, stable composition and favorable physical......
摘 要:Leaching of rare earths Y,La and Ce by sulphuric acid from fine-grained zirconosilicate ore was investigated using Taguchi method of experimental...,leaching temperature,grind size and dilution.Statistical analysis showed that sulphation baking was a significant step for the leaching of rare earths from the whole-of-ore and optimized leaching......
">In this study,how to improve the stability of reduced manganese oxide ore was discussed by investigating reoxidation conditions and kinetics mechanism in the cooling process of manganese dioxide ore... of manganese in ore and the reoxidation kinetics of reduced products were studied.The results show that decrease of reduction temperature and time,and increase of raw materials thickness and little H2SO4......
