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size and leaching time on dissolution rate of the main metals in the samples were investigated. The prepared leaching solution with the desired hydrochloric acid concentration was placed into a 1 L.... Because Ni and Co exist in oxide forms (Fig.8), the interaction of acid with relatively high concentration to oxides of Ni and Co is fast, and the leaching rates of them reach the maximum in relatively......
by hydrochloric acid direct leaching of Panzhihua ilmenite [J]. Iron Steel Vanadium Titanium, 1982(4): 50-58. (in Chinese) [2] CARDARELLI F. Materials handbook: A concise desktop reference [M]. London... of Rosetta ilmenite by direct reduction leaching [J]. Hydrometallurgy, 2005, 76: 123-129. [6] NAYL A A, ALY H F. Acid leaching of ilmenite decomposed by KOH [J]. Hydrometallurgy, 2009, 97: 86-93. [7......
nickel and nickel sulfide. The nickel leaching efficiency of residue after segregation roasting is much higher than that of the residue without segregation roasting by direct sulfuric acid leaching...J. Cent. South Univ. (2012) 19: 340-346 DOI: 10.1007/s11771-012-1010-9 Extraction of nickel from molybdenum leaching residue of metalliferous black shale by segregation roasting and acid leaching CHU......
for preparing pure manganese sulfate from low-grade ores with a granule mean size of 0.47 mm by direct acid leaching was developed. The effects of the types of leaching agents, sulfuric acid concentration, reaction temperature, and agitation rate on the leaching efficiency of manganese were investigated. We observed that sulfuric acid used as a leaching agent provides a similar leaching efficiency......
低品位含钼硫化矿直接浸出试验朱军1,王彦君1,李营生1,陈宁1(1.陕西省西安市西安建筑科技大学)摘 要:对比试验结果选择硝酸直接浸出低品位含钼硫化矿工艺,并通过正交试验研究了矿物粒度,浸出剂浓度,浸出温度,液固比,浸出时间等对钼浸出率的影响.结果为液固比,硝酸,硫酸的浓度是影响钼浸出率的主要因素.试验确定了硝酸直接浸出原矿的最优条件:液固比4∶1,用45%的硝酸,20%的硫酸在70℃下浸出粒度为147μm的原矿2h.钼的浸出率可达75%.关键词:冶金技术； 钼； 直接浸出； 硝酸； 正交试验......
Pressure leaching of zinc silicate ore in sulfuric acid medium LI Cun-xiong(李存兄), XU Hong-sheng(徐红胜), DENG Zhi-gan(邓志敢), LI Xing-bin(李兴彬), LI Ming-tin(李旻廷), WEI Chang(魏 昶) Faculty... and the results showed that zinc exists mainly as hemimorphite and smithsonite in the sample. Sulfuric acid pressure leaching of zinc silicate ore was carried out to assess the effect of particle size, sulfuric......
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and A.t respectively) is examined in comparison with the chemical leaching by sulfuric acid. The mineral samples and leaching residues are characterized by scanning electron microscopy (SEM), energy... after marmatite is leached for 29 days. The bioleaching rate is much higher than the sulfuric acid leaching rate. Fig.3 Bioleaching of marmatite in presence and absence of bioleaching bacteria......
Kinetics of acid-oxygen leaching of low-sulfur Ni-Cu matte at atmospheric pressure FAN Chuan-lin(范川林), LI Bin-chuan(李斌川), FU Yan(符 岩), ZHAI Xiu-jing(翟秀静) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China Received 6 July 2009; accepted 5 January 2010 Abstract: The leaching of low-sulfur Ni-Cu matte in acid-oxygen (CuSO4-H2SO4-O2) solution......
