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Decomposition mechanism of chromite in sulfuric acid–dichromic acid solutionQing Zhao1,2,Cheng-jun Liu1,2,Bao-kuan Li2,Mao-fa Jiang1,21. Key Laboratory for Ecological Metallurgy of Multimetallic Ores(Ministry of Education),Northeastern University2. School of Metallurgy,Northeastern University摘 要:The sulfuric acid leaching process is regarded......
alloy from Africa were studied by the mixed acid solution of sulfuric acid and hydrochloric acid with oxidant. The experimental results show that more than 97% of Cu and Co can be reached under... r/min at the lower mole ratio of sulfuric acid to hydrochloric acid and at 80 ℃. The formation of silica gel can be prevented under modified experimental condition. Slurry can be easily filtrated......
Removal of copper from nickel anode electrolyte through ion exchange CHEN Ai-liang(陈爱良)1, 2, QIU Guan-zhou(邱冠周)1, ZHAO Zhong-wei(赵中伟)2, SUN Pei-mei(孙培梅)2, YU Run-lan(余润兰)1 1...; Abstract: An novel method for removal of copper from nickel anodic electrolyte through ion exchange was studied after cupric......
, Xihua University, Chengdu 610039, China Received 6 September 2011; accepted 6 April 2012 Abstract: The special experimental device and sulfuric acid electrolyte were adopted to study the influence...: aluminum alloy; 2024 aluminum alloy; oxidation heat; sulfuric acid electrolyte; hard anodic oxidation; anodic film 1 Introduction Conducting hard anodizing on the surface of aluminum parts......
Sulfuric acid leaching kinetics of South African chromiteQing Zhao1,2,Cheng-jun Liu1,Pei-yang Shi1,Bo Zhang1,Mao-fa Jiang1,Qing-song Zhang1,Ron Zevenhoven2,Henrik Saxén21. Key Laboratory...">The sulfuric acid leaching kinetics of South African chromite was investigated. The negative influence of a solid product layer constituted of a silicon-rich phase and chromium-rich sulfate......
Reductive leaching of indium from the neutral leaching residue using oxalic acid in sulfuric acid solutionF.Maddah,M.Alitabar,H.YoozbashizadehDepartment of Materials Science and Engineering, Sharif... in sulfuric acid solution. The effect of main factors affecting the process rate, including the oxalic-acid-to-sulfuric-acid ratio, stirring rate, grain size,temperature, and the initial concentration......
Leaching isomorphism rare earths from phosphorite ore by sulfuric acid and phosphoric acidHui-Xin Jin1,2,Fu-Zhong Wu1,2,Xiao-Hao Mao1,Mei-Long Wang1,Hong-Yan Xie11. College of Materials... in the world contain isomorphism rare earths(RE) which are considerably difficult to be leached into solution in the wet phosphoric acid process. In this work, a systematic study of leaching RE using sulfuric......
activation was employed during the leaching(mechanochemical leaching) of chalcopyrite concentrates in a sulfuric acid medium at room temperature and atmospheric pressure. High energy ball milling process...Mechanochemical leaching of chalcopyrite concentrate by sulfuric acidFarhad Khorramshahi Mohammadabad1,Sina Hejazi2,Jalil Vahdati khaki1,Abolfazl Babakhani11. Materials and Metallurgical Engineering......
: The properties of anodic films formed in chromic, boric-sulfuric and adipic-sulfuric acid (CAA, BSAA and ASAA, respectively) on LY12 aluminum alloy were studied by morphology characterization, current... anodization; boric-sulfuric acid anodization; adipic- sulfuric acid anodization 铝及铝合金由于其优异的综合性能而受到广泛重视,尤其在航空领域,一直用作最重要的结构材料之一[1].阳极氧化是最常用于提高其耐蚀性的方法之一.铬酸阳极氧化作为传统的铝合金阳极氧化技术,其氧化膜具有良好的性能,但是铬酸阳极氧化中六价铬的大量使用会带来严重的环境污染......
of millscale from steel plant and the effects of the liquid-solid ratio, the reaction temperature, the leaching time and the sulfuric acid excessive times was investigated. The best technical conditions of the leaching process were ascertained, and the kinetics of leaching was studied. The results show that when liquid-solid ratio is 3?1, the sulfuric acid excess is 1.25 times, reaction temperature......