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, which makes their pellets quite different from each other in the process of oxidizing roasting. For this reason, studies on the properties of pellets of artificial and natural magnetite concentrate... taken for mineral phase study. The microstructures are shown in Figs. 12, 13 and 14. After the process of oxidizing roasting, the magnetite pellet is predominantly composed of hematite (H......
Deselenization and detellurization of precious-metal ore concentrates by swelling oxidizing roasting and successive alkaline leachingFu-yuan Zhang1,2,3,Ya-jie Zheng1,Guo-min Peng2,31. School of Metallurgy and Environment,Central South University摘 要:A new technique of swelling oxidizing roasting and alkaline leaching was proposed for deselenization......
attention to the intermediate compounds in the roasting process when we want to intensify the chromite oxidizing process. 4 Conclusions 1) The spinel structure of chromite such as FeO·Cr2O3, MgO·Cr2O3...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......
Trans. Nonferrous Met. Soc. China 27(2017) 1618-1626 Molybdenite-limestone oxidizing roasting followed by calcine leaching with ammonium carbonate solution Qiu-sheng ZHOU, Wei-tao YUN, Jun-tao XI...: Oxidizing roasting of molybdenite with lime can significantly reduce SO2 pollution compared with the traditional roasting without lime. However, the calcine is subsequently leached by sulfuric acid......
of vanadium by high-carbon stone coal fluidized through oxidizing roasting WANG Ping1, FENG Ya-li1, LI Hao-ran2, LIU Xin-wei1, ZHANG Ping1 (1. School of Civil and Environmental Engineering, University...) Abstract: In order to enhance the leaching rate of vanadium, the fluidized oxidizing roasting was adopted to pretreat the high-carbon stone coal from Guangxi province, China. The thermodynamics......
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% and addition of hydrofluoric acid 2%. Under the optimal acid leaching conditions, the rate of leaching vanadium can reach 88.26%. Key words: vanadium; high-carbon stone coal; oxidizing roasting; acid..., 2009: 74-77. [13] 何东升, 冯其明, 张国范, 等. 含钒石煤的氧化焙烧机理[J]. 中国有色金属学报, 2009, 19(1): 195-200.HE Dong-sheng, FENG Qi-ming, ZHANG Guo-fan, et al. Mechanism of oxidizing roasting process of vanadium containing......
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and gold cyanidation experiment, the characteristics of gold leaching and the affecting mechanism of oxidizing roasting pretreatment were studied on an acidic antimony leaching residue. The process of acid antimony leaching-oxidizing roasting desulfurization-gold cyanidation was also investigated. The results show that being wrapped in pyrite is the primary cause for low leaching rate of gold......
], and mainly due to economical reasons that sulfuric acid was preferred. Segregation roasting followed by oxidizing pressure leaching with sulfuric acid [16] was involved to recover nickel from nickel...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......