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was investigated. Effects of leaching temperature, leaching time, mass ratio of liquid to solid and tetrachloroethylene addition on zinc leaching processes were examined separately. SEM images... on extraction ratio of zinc. Key words: sphalerite; H2SO4-HNO3; coupling leaching CLC number: TF111.31 Document code: A 1 INTRODUCTION With diminishing mineral resources and more stringent policy......
was studied. After leaching for 29 days, the leaching ratio of zinc was 91%. Three kinds of bacteria, mixture-based bacteria, 9K-based bacteria and sulfur-based bacteria were used in marmatite leaching... was discussed. Key words: marmatite; bioleaching; leaching ratio; Acidithiobacillus ferrooxidans; Acidithiobacillus thiooxidans 1 Introduction Microbial leaching of metals from sulfide minerals......
Mechanism of electro-generating leaching of chalcopyrite-MnO2 in presence of Acidithiobacillus thiooxidans XIAO Li(肖 利)1, 2, LIU Jian-she(柳建设)3, FANG Zheng(方 正)1, QIU Guan-zhou(邱冠周)4 1. School... minerals in the electro-generating leaching(EGL) and the bio-electro-generating leaching(BEGL), respectively. The results showed that the dissolution rates for Cu2+ and Fe2+ in BEGL were almost 2 times......
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... increases with decreasing pH and increasing flow velocity and temperature. Moreover, Cr(Ⅵ) leaching percentage increases with increasing ratio of solid mass to solution volume. The optimal parameters......
of 120 μm for the exhausted scraps, molar ratio of H2O2 to MeS of 2, leaching temperature about 60 ℃, ratio of liquid to solid of 8, and leaching time of 2 h. The NixCoyMnz precursor for cathode material... concentrates directly. The aim of this work is to recover nickel, cobalt, manganese and other metals from spent battery material by leaching treatment. The effects of various conditions, such as the ratio......
. It is observed that the extraction ratio reaches 97% after leaching for 200 min when chromite ore is mechanically activated for 10 min, but only 34% if not activated. Mechanical activation can decrease.... The extraction ratio reaches 97% after leaching for 200 min when chromite ore is mechanically activated for 10 min, and the extraction ratio is only 34% when the ore is not activated. The strengthening effect......
: the liquid to solid ratio (mL/g) of 5:1, the leaching temperature of 453 K, the retention time of 2 h, the initial sulfuric acid concentration of 0.74 mol/L, the oxygen partial pressure of 0.7 MPa... of copper dust as a contrast test is carried out under the following conditions: the liquid to solid ratio (mL/g) of 5:1, the initial sulfuric acid concentration of 0.74 mol/L, and the leaching temperature......
agent concentration, leaching temperature, leaching cumulative time and solid-to-liquid ratio. The thermodynamics and kinetics of the zinc leaching process were also analyzed. The results show.... NaOH was used as leaching agent at a solid-to-liquid ratio of 1:10, 5 g electric arc furnace dust was added under constant agitation and in a 1 L closed flask, a water-cooled condenser as flask cover......
of leaching arsenic from Ni-Mo ore roasting dust was investigated. The effects including leaching temperature, particle size of the smelter dust, stirring speed, the coef？cient β (the molar ratio of sodium...Kinetics study of leaching arsenic from Ni-Mo ore roasting in dust mixture of hydrochloric and sulfuric acidsHOU Xiao-chuan(侯晓川)1, 2, YANG Yun-de(杨润德)1, LI He(李贺)1, ZENG-li(曾理)2, XIAO Lian-sheng(肖连生......
method The experiments were carried out in shake flasks, which were put in an oscillator. The ratio of liquid to solid was 10?1. The leaching solution was sulfuric acid prepared before the experiments... leaching in germ-free system OU Le-ming(欧乐明), HE Rong-quan(何荣权), FENG Qi-ming(冯其明) (School of Resources Processing and Bioengineering, Central South University, Changsha 410083, China) Abstract......
