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Nature 2018 Abstract: In order to deal with the disadvantages of excessive grinding and non-uniformity in finished particle under high-pressure grinding rolls (HPGR) finished grinding system, four... be strengthened based on the uniformity of particles. Key words: high-pressure grinding rolls; particle uniformity; uniformity coefficient; average particle size; flotation; shielding effect; compact effect Cite......
mixture (V(HNO3): V(HClO4):V(HF)=5:3:2) in a polytetrafluoroethylene beaker and placed in a high-pressure digestion oven at 170 °C for 5 h. The digested acid mixture was analyzed with an ICP-AES...Trans. Nonferrous Met. Soc. China 23(2013) 3770-3779 Water leaching kinetics and recovery of potassium salt from sintering dust Guang ZHAN, Zhan-cheng GUO State Key Laboratory of Advanced Metallurgy......
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......
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a high precision to approach the monitoring data. 6 Conclusions 1) Leaching system is a complicated nonlinear dynamic system affected by not only intrinsic factors but also external stochastic...): 441-462. [6] LIU Xin-yu, LIU Ai-hua, LI Xi-bing. Experimental study of permeability of rock-like material with filling fractures under high confining pressure [J]. Chinese Journal of Rock Mechanics......
? CaCrO4 have slow diffusion rate[13]. Previous research demonstrated that decreasing pH value and increasing pressure and temperature could promote Cr(Ⅵ) leaching[11]. Moreover, CaCrO4·Ca2SiO4·CaCrO4... at pH 2.0. Meanwhile, leaching percentage of Cr(Ⅵ) increases linearly with decreasing pH in the range of 2-4 with a high correlation coefficiency (R2=0.964 5, P＜0.01). Fig.2 Cr(Ⅵ) concentrations......
the leaching rate[19]. But too high L/S ratio would lead to the increase of leaching solution volume, which is not favorable to subsequent separation. Therefore, the L/S ratio of 8:1 is suitable... on the dissolution rates is shown in Fig.7. It can be seen that the dissolution rates of Ni and Co can achieve a high value in 40 min and the maximum value of Ni is presented after leaching for 60 min......
Effect of mechanical activation on alkali leaching of chromite ore ZHANG Yang(张 洋)1, 2, ZHENG Shi-li(郑诗礼)1, DU Hao(杜 浩)1, XU Hong-bin(徐红彬)1, ZHANG Yi(张 懿)1 1. National Engineering Laboratory.... 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......
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