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with the model: v=1.87t-0.54, indicating that the leaching rate of Cr(Ⅵ) declines in an exponential order of -0.54. Key words: chromium-containing slag; Cr(Ⅵ) leaching; leaching rate; dynamic model ...? 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......
氧化铜矿常温常压两段氨浸试验研究纪翠翠1,周庆华1(1.云南省昆明市昆明理工大学国土资源工程学院)摘 要:对云南某地高含泥高碱性脉石矿物的氧化铜矿石,采用氨浸-萃取-电积的工艺来处理.小型试验研究考察了机械搅拌浸出的各种影响因素,拟定按常温常压的方式来浸出,以便产业化应用.试验结果表明采用两段浸出的工艺比单段浸出总铜浸出率提高了7.48%.关键词:氧化铜矿； 氨浸； 矿泥； 两段浸出......
of sulfuric acid is 300 g/L and the residue is agitated for 3 h at leaching temperature of 80 °C, the leaching rate of selenium could reach 97.76 %. The experimental results conform the calculated results... solution and leaching slag obtained under optimum conditions In Table 5, it is indicated that after oxidization- leaching under this condition, the leaching rate of selenium could reach 97.76......
下钾,铝的浸出率 Table 3 Leaching rate of Al and K under different conditions 在浸出温度220 ℃,浸出时间180 min,酸矿比3:1,搅拌速率600 r/min的条件下,考察不同初酸含量对钾,铝浸出率的影响,结果如图4所示. 图3 酸矿比对铝,钾浸出率的影响 Fig. 3 Effect...): 20-22. Utilizing alunite comprehensively from Zijin copper tailings by directly pressure acid leaching KUANG Ge, HU Song, CAI Yang-yang, LI Huan (Institute of Chemical Engineering and Technology......
. For smaller ore particle, the reaction rate is high and the peak number of copper leaching rate is comparatively low; for large size ore particle, the reaction rate is low and the peak number of copper..., the copper leaching rate reaches 74.37% in the solution in which the ore particle size is bigger than 0.098 mm and equal or less than 0.125 mm. The relationship equation between ore particle size, copper......
; 文章编号:1672-7207(2014)06-1766-06 Regularities for uranium leaching rate at different heights of column for leaching uranium from uranium ore FU Haiying, DING Dexin, YE... test were compared. The results show that the uranium leaching rate at different heights of the column are different, and there are the same trends for the model value and test data. So......
be obtained and gold leaching rate is considerably increased on cyanide leaching of gold from gold concentrates. Key words: co-intensification; cyanide leaching; mercury ions; hydrogen peroxide... polarization plot of gold in cyanide solution with pH 11.0, temperature 25 °C, disc rotation speed 400 r/min, scan rate 1mV/s and c(NaCN) 0.02 mol/L Since leaching reaction is taken place at the first active......
arrangement. After the craft is used, the permeability coefficient of heap is 8~50 times as that of crude ore, and the comprehensive leaching rate increases from 10% up to 63.98%. The high-clay copper...用此工艺后,浸堆的渗透系数增加为原矿的8~50倍,综合浸出率由不到10%提高到63.98%,使高含泥氧化铜矿得到成功堆浸.关键词:高含泥；低渗透性；堆浸；水洗-分级；浸出率Craft of wash-classification of heap leaching used in high-clay copper oxide oreWANG Shao-yong1,2, WU Ai-xiang1,2......
Accelerating leaching of copper ore with surfactant and the analysis of reaction kineticsChun-ming Ai1,2,Ping-ping Sun1,Ai-xiang Wu2,Xun Chen2,Chao Liu31. College of Safety Science and Engineering..., the permeability coefficient was two times higher than that of the control group. Meanwhile, the ore extraction rate increased by approximately 10%. During the leaching process, the surface tension......
A, KONDASB J, VRANKAC F. Extraction of copper, zinc, nickel and cobalt in acid oxidative leaching of chalcopyrite at the presence of deep-sea manganese nodules as oxidant [J]. Hydrometallurgy, 2005... Electrogenerative leaching for sphalerite-MnO2 in the presence of Acidithiobacillus thiooxidans WANG Shao-fen(王少芬)1, XIAO Li(肖 利)2, 3, FANG Zheng(方 正)2, QIU Guan-zhou(邱冠周)2, WANG Chun......
