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or wastewater [1-5]. In zinc hydrometallurgy, zinc calcine is leached by sulfuric acid solution first, and then it is put into the leaching solution to neutralize in order to separate impure metals......
concentrates to produce porous calcine with the increased amenability to cyanidation[9-10]. Pressure oxidation and biooxidation methods have gained importance in recent years mainly due......
is produced by fluidized roasting desulfurization, calcine sintering mixture and reduction smelting in blast furnace; then, the antimony oxide powder and crude lead are produced by converting the lead......
dried, were put into a muffle furnace to calcine for 0.5, 1, 1.5, or 2 h at three different temperatures of 900, 950 or 1 000 ℃. The content of soluble K2O in the calcined product was measured......
of a zinc silicate calcine[J]. Hydrometallurgy, 2007, 89(3/4): 337-345. [24] Lozano L J, Juan D. Leaching of vanadium from spent sulphuric acid catalysts[J]. Minerals Engineering, 2001, 14(5): 543-546......
calcine[J]. Hydrometallurgy, 2007, 89(3/4): 337-345. [21] DENG C H, FENG Q M, CHEN Y. Studies on the leaching kinetics of cobalt from spent catalyst with sulphuric acid [J]. Mineral Processing......
of Nonferrous Metals, 2001, 11(3): 514-517. [16] SOUZA A D, PINA P S, LIMA E V O, SILVA C A, LEAO V A. Kinetic of sulphuric acid leaching of a zinc silicate calcine[J]. Hydrometallurgy, 2007, 89(3/4): 337-345......
. Kinetic of sulphuric acid leaching of a zinc silicate calcine[J]. Hydrometallurgy, 2007, 89: 337-345. [19] Ishida M, Wen C Y. Comparison of kinetic and diffusional models for solid-gas reactions[J......
下的焙烧产物的XRD谱. 由图6可看出:原矿中Bi2S3主要转化为Bi2O3和Bi28O32(SO4)10;原矿中FeS2主要转化为Fe2O3;MnO2在焙烧过程中顺利生成MnSO4,过量的MnO2主要以Mn2O3存在,同时发现有MnS生成,其余的主要为SiO2和CuO等. 图6 交互焙烧产物焙烧的物相分析 Fig. 6 XRD pattern of calcine......
nitrogen atmosphere. The cooled briquettes were broken and ground in a wet ball mill, and then were separated in a Davis tube: the grinding fineness of the reduced calcine is 100% passing 0.075 mm......