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concentration 20%, reaction temperature 80 ℃, solid-liquid ratio 1?10 and reaction time 60 min. Thus, synthetic rutile was prepared from high titanium slag by microwave-assisted leaching process... Green evaluation results The green evaluation results of high titanium slag under microwave-assisted leaching and conventional acid leaching are obtained from the following equation, which can......
of Cr(Ⅵ) concentration leached out from chromium-containing slag with HCl as leaching agent, and to study influences of pH, ratio of solid mass to solution volume, flow velocity and temperature on Cr(Ⅵ) leaching. The optimal parameters were obtained for Cr(Ⅵ) leaching and a fitting model was established to describe the procedure of Cr(Ⅵ) leaching. The results show that Cr(Ⅵ) concentration in leachate......
of cobalt from Ni-Co concentrate with sulfuric acid leaching is determined by particle size, sulfuric acid concentration and reaction temperature, while stirring speed in the range of 400-1200 r/min shows a negligible effect on extraction of cobalt. A cobalt recovery of 94.2% and a nickel recovery of 93.5% are achieved by leaching 0.074-0.100 mm Ni-Co concentrate particles with sulfuric acid of 6......
,Ce,and Tb from the waste rare earth fluorescent powders were investigated in this paper.The results show that hydrochloric acid is better than sulfuric acid in the first acid leaching,and NaOH is better than Na2CO3in the alkali fusion.In the first acid leaching,the Wloss is 20.94%when the waste rare earth fluorescent powders are acid leached in H?concentration 3 mol L-1and S/L ratio 1:3 for 4 h......
atmospheric leaching, and no need for high-pressure operation as high pressure acid leaching (HPAL). The ferric iron in leaching solution could be effectively removed by sodium jarosite process with a little... ____________________________________________________________________________________________ 1 Introduction For a hydrometallurgical process of nickel laterites, conventionally, high pressure acid leaching (HPAL) process has been the preferred route due to precipitation......
]. Hydrometallurgical methods are used to extract metallic values from low-grade ores [5-7]. Sulfuric acid is the most common lixiviant used for copper leaching [8-9]. However, acid leaching for the preponderance...J. Cent. South Univ. (2012) 19: 77-84 DOI: 10.1007/s11771-012-0975-8 Leaching kinetics of low-grade copper ore with high-alkality gangues in ammonia-ammonium sulphate solution LIU Zhi-xiong(刘志雄)1, 2......
in sphalerite.The research was to investigate the amenability of zinc concentrate with high gallium to pressure oxygen leaching.The particle size,sulfuric acid concentration,oxygen partial pressure,additive...,sulfuric acid concentration150 g L-1,leaching temperature 150℃,leaching time120 min,oxygen partial pressure 0.7 MPa,additive amount of 0.2 wt%.关键词:......
100088, China)Abstract:The application of microwave irradiation for pretreatment of copper anode slime with high nickel content prior to pressure sulfuric acid leaching has been proposed. The microwave...Intensification of pretreatment and pressure leaching of copper anode slime by microwave radiationYANG Hong-ying(杨洪英)1, MA Zhi-yuan(马致远)1, 2, HUANG Song-tao(黄松涛)2, LV Yang(吕阳)1, XIONG Liu(熊柳)1(1......
in aqueous solution depending on some factors such as time, sulfuric acid amount, bauxite dosage, initial Cr(VI) concentration, formic acid concentration, daylight and temperature were presented. The obtained results show that sulfuric acid amount, bauxite dosage and initial Cr(VI) concentration of solution are most effective parameters on the reduction process. Also, it has been found that the 60 g......
: 2000-2005. [19] CHEN Xiang-yang, LAN Xin-zhe, ZHANG Qiu-li, MA Hong-zhou, ZHOU Jun. Leaching vanadium by high concentration sulfuric acid from stone coal [J]. Transactions of Nonferrous Metals... solution. The effects of waste tea dosage, concentration of sulfuric acid, liquid-to-solid ratio, leaching temperature and reaction time on leaching process were explored. The leaching efficiency......
