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；浸金；除铁Pretreatment by sulfuric acid-curing of calcine roasting for gold ores with high sulfur and arsenic contentsYANG Yong-bin,ZENG Guan-wu,LI Qian,LIU Xiao-liang,JIANG Tao,LIU Bo(School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China)Abstract:Based on thermodynamics between iron oxides and sulfuric acid,a pretreatment process of sulfuric acid-curing......
微波加热下硫酸浸溶黄铜矿动力学 刘纯鹏1,苏永庆2 (1.昆明理工大学冶金系,昆明,650093;2.云南师范大学化学系,昆明,650092) 摘要:研究了微波场中硫酸浸溶黄铜矿的动力学,结果表明微波加热提高了铜浸溶速率和浸出率.其浸出率和浸溶速率受氧化剂MnO2的含量和黄铜矿粉末的粒度影响,并可分别用数学式α=1/at+b和dα/dt=1/b(1-aα)2来表达,a是与MnO2的含量有关的参数,MnO2的含量越高,a越小,浸出率和浸出速率越大;b是与黄铜矿的粉末粒度有关的参数,粉末粒度越细,b越小,同样,浸出率和浸出速率也就越大. 关键词:微波; 黄铜矿; 硫酸; 浸溶; microwave heating; chalcopyrite; sulfuric acid; leaching; [全文内容正在添加中] ......
Preparation, characterization and photocatalytic activity of sulfuric acid-modified titanium-bearing blast furnace slag LEI Xue-fei(雷雪飞)1, XUE Xiang-xin(薛向欣)2 1. Department of Materials Science...; accepted 14 March 2010 Abstract: The feasibility of reducing Cr(VI) from the aqueous solution by sulfuric acid-modified titanium-bearing blast furnace slag (SATBBFS) as a photocatalyst......
pressure acid leaching process for the extraction of nickel and cobalt. The effects of sulfuric acid added, leaching temperature, leaching time and liquid/solid (L/S) ratio on metals extraction were... leaching process[13-15]. In this work, the high pressure acid leaching is adopted to extract nickel and cobalt from laterite ore. The effects of various parameters including sulfuric acid added, leaching......
, Tehran 1591634311, Iran摘 要:Leaching of an oxidized copper ore containing malachite, as a new approach, was investigated by an organic reagent, citric acid. Sulfuric acid is the most common reagent in the leaching of oxide copper ores, but it has several side effects such as severe adverse impact on the environment. In this investigation, the effects......
Trans. Nonferrous Met. Soc. China 22(2012) 1655-1660 Effects of boric acid on microstructure and corrosion resistance of boric/sulfuric acid anodic film on 7050 aluminum alloy DU Nan, WANG Shuai...; accepted 14 October 2011 Abstract: The microstructure and corrosion resistance of different boric/sulfuric acid anodic (BSAA) films on 7050 aluminum alloy were studied by atomic force microscopy (AFM......
氧化铅锌矿直接硫酸浸出贺山明1,王吉坤2,李勇1(1.云南省昆明市昆明理工大学冶金与能源工程学院2.云南冶金集团股份有限公司 技术中心,昆明 650031)摘 要:探讨用硫酸直接浸出氧化铅锌矿,研究各种因素对浸出的影响.结果表明,在最佳工艺条件下,锌的浸出率可达97%以上,铅入渣率可达98%以上,产液速率大于162.5 L/m2·h,渣含锌约2.5%,渣含铅量高达40%以上,浸出渣可送往炼铅系统处理.关键词:冶金技术； 氧化铅锌矿； 硫酸浸出； 过滤性能； 浸出率； 铅入渣率......
:TF813；TF111.31 文献标志码:A Atmospheric direct leaching kinetics of zinc sulfide concentrate in oxygen-rich sulfuric acid system XU Zhi-feng1, ZHU Hui1, WANG... and Metallurgy, Beijing 100160, China) Abstract: The atmospheric direct leaching (ADL) kinetics of zinc sulfide concentrate in oxygen-rich sulfuric acid system was studied by the integration......
采用硫酸作为稳定剂制备微米级球形银粉 吴丰顺1,吴懿平1,安兵1,蔡雄辉1 (1.华中科技大学材料科学与工程学院,武汉,430074;2.武汉国家光电实验室,武汉,430074) 摘要:采用抗坏血酸作为还原剂,硫酸作为稳定剂,在高速搅拌,室温的条件下还原硝酸银溶液制备微米级球形银粉.考查了硫酸用量,反应温度和添加高分子保护剂对银粉的微观形貌的影响.通过SEM,EDX和XRD对制备的银粉进行了表征分析,结果表明:制备的超细银粉为类球形,粒径较为均一,粒径范围为1~2.0μm可调;减小或增大硫酸用量都将导致银粉粒径变小;升高温度或者添加适量的N-甲基吡咯烷酮也可减小粒子粒径. 关键词:银粉; 湿化学; 硫酸; 抗坏血酸; 微米; silver powder; wet-chemical synthesis; sulfuric acid; ascorbic acid; micro......
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