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J. Cent. South Univ. Technol. (2011) 18: 83-88 DOI: 10.1007/s11771-011-0663-0 Thermodynamics of chromite ore oxidative roasting process QI Tian-gui(齐天贵), LIU Nan(刘楠), LI Xiao-bin(李小斌), PENG...-Verlag Berlin Heidelberg 2011 Abstract: To explicate the thermodynamics of the chromite ore lime-free roasting process, the thermodynamics of reactions involved in this process was calculated......
,roasting temperature,and roasting time on the acidolysis ratio of TiO2during the process of roasting high titanium slag with concentrated sulfuric acid were systematically investigated.The results show that the sequence of each factor affecting the acidolysis ratio of TiO2 is:mass ratio of acid to ore,roasting time,and roasting temperature.The optimum technological conditions are obtained as mass......
J. Cent. South Univ. (2012) 19: 340-346 DOI: 10.1007/s11771-012-1010-9 Extraction of nickel from molybdenum leaching residue of metalliferous black shale by segregation roasting and acid leaching CHU... roasting-sulfuric acid leaching-solvent extraction was investigated. The residue was characterized by microscopic investigations, using X-ray fluorescence spectrometry (XRF) and X-ray diffractometry (XRD......
Roasting and leaching behaviors of vanadium and chromium in calcification roasting–acid leaching of high-chromium vanadium slagJing Wen1,Tao Jiang1,2,Mi Zhou1,2,Hui-yang Gao1,Jia-yi Liu1,Xiang-xin...–acid leaching of high-chromium vanadium slag(HCVS)was conducted to elucidate the roasting and leaching behaviors of vanadium and chromium.The effects of the purity of Ca O,molar ratio between Ca O......
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......
Decomposition of mixed rare earth concentrate by NaOH roasting and kinetics of hydrochloric acid leaching processMei Li1,2,3,Jianfei Li1,2,Dongliang Zhang2,3,Kai Gao2,3,Huihui Wang2,Wei Xu2,Jinlong... of Chemical Technology摘 要:A new clean extraction technology for the decomposition of Bayan Obo mixed rare earth concentrate by NaOH roasting is proposed.The process......
Decomposition of mixed rare earth concentrate by NaOH roasting and kinetics of hydrochloric acid leaching processMei Li1,2,3,Jianfei Li1,2,Dongliang Zhang2,3,Kai Gao2,3,Huihui Wang2,Wei Xu2,Jinlong... of Chemical Technology摘 要:A new clean extraction technology for the decomposition of Bayan Obo mixed rare earth concentrate by NaOH roasting is proposed.The process......
advantages, such as high recovery, low economic cost and less impurities in leaching solution. Key words: stone coal; roasting; acid leaching; vanadium..., such as microwave roasting[14] and calcified roasting[15]. The acid leaching after oxidation roasting without additives is a promising technique to leach vanadium from stone coal in an environmental-friendly......
of recycling the zinc dross. With better ability of absorbing the microwave than zinc oxide, the main material in zinc dross, chlorides, can be heated and evaporated rapidly during microwave roasting. Various parameters including roasting temperature, duration time and stirring speed were optimized. The microstructure of roasted materials was characterized by X-ray diffraction (XRD) and scanning electron......
by alkaline roasting method for the production of TiO2.The process included alkaline roasting, water leaching and acid leaching steps.In the alkaline roasting step, the factors such as roasting temperature... 32-in CaTiO3 was not destroyed during the roasting process.In the acid leaching step, Ca(OH)2 could be completely leached at pH = 6-7 and Na2TiO3 was completely hydrolyzed simultaneously.The crystal......