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中冰镍硫酸浸出试验研究
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作者 巫旭 卫媛 《金川科技》 2019年第4期55-56,60,共3页
在低冰镍吹炼过程中,为了将铁造渣除去,不可避免有部分钴和少量镍进入渣中,导致了吹炼过程中有价金属的损失。为了减少有价金属的损失,在低冰镍吹炼过程中,控制吹炼的深度,只使一部分铁开路,产出含铁16%-18%的中冰镍,再使用湿法浸出的... 在低冰镍吹炼过程中,为了将铁造渣除去,不可避免有部分钴和少量镍进入渣中,导致了吹炼过程中有价金属的损失。为了减少有价金属的损失,在低冰镍吹炼过程中,控制吹炼的深度,只使一部分铁开路,产出含铁16%-18%的中冰镍,再使用湿法浸出的工艺处理。本研究对浓硫酸常压浸出和稀硫酸氧压浸出两种方法处理中冰像进行了对比。由试验结果得到,使用稀硫酸氧压浸出可以达到较高的浸出率,且浸出液含铁、含酸较低,有利于后续的处理。 展开更多
关键词 有色金属冶金 中冰镍 浓硫酸浸出 氧压
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湿法炼锌净化镍钴渣综合利用生产实践 被引量:4
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作者 李德磊 张昱琛 《中国有色冶金》 北大核心 2015年第2期53-55,共3页
净化渣综合回收一直是湿法炼锌需要解决的问题之一。本文阐述了湿法炼锌净化镍钴渣浓硫酸全浸及钴分离技术,其有可效回收锌、钴、铅、镉及镍等有价金属,实现镍钴渣高价值综合利用。
关键词 湿法炼锌 镍钴渣 浓硫酸浸出 高钴渣 铅渣 镉渣 镍渣
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从水淬渣中回收镓的试验研究 被引量:5
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作者 黄文孝 罗泽安 杨飞 《稀有金属与硬质合金》 CAS CSCD 2003年第1期8-10,17,共4页
对鼓风炉(ISP法)或烟化炉水淬渣中回收镓的工艺进行了研究。结果表明,利用浓硫酸恒温熟化的独特浸出工艺,克服硅对液固分离的影响;以伯胺N1923作为萃取剂在硫酸介质中萃取镓;获得了含镓品位为2 82%的富集物。
关键词 ISP炉渣 浓硫酸浸出 萃取 回收镓
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Technological conditions and kinetics of leaching copper from complex copper oxide ore 被引量:10
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作者 孙锡良 陈白珍 +1 位作者 杨喜云 刘有源 《Journal of Central South University》 SCIE EI CAS 2009年第6期936-941,共6页
The kinetic behavior of leaching copper from low grade copper oxide ore was investigated. The effects of leaching temperature, H2SO4 concentration, particle size of crude ore and agitation rate on the leaching efficie... The kinetic behavior of leaching copper from low grade copper oxide ore was investigated. The effects of leaching temperature, H2SO4 concentration, particle size of crude ore and agitation rate on the leaching efficiency of copper were also evaluated. And the kinetic equations of the leaching process were obtained. The results show that the leaching process can be described with a reaction model of shrinking core. The reaction can be divided into three stages. The first stage is the dissolution of free copper oxide and copper oxide wrapped by hematite-limonite ore. At this stage, the leaching efficiency is very fast (leaching efficiency is larger than 60%). The second stage is the leaching of diffiuent copper oxides, whose apparent activation energy is 43.26 kJ/mol. During this process, the chemical reaction is the control step, and the reaction order of H2SO4 is 0.433 84. The third stage is the leaching of copper oxide wrapped by hematite-limonite and silicate ore with apparent activation energy of 16.08 kJ/mol, which belongs to the mixed control. 展开更多
关键词 copper oxide ore H2SO4 LEACHING KINETICS activation energy
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Study on hydrometallurgical process and kinetics of manganese extraction from low-grade manganese carbonate ores 被引量:6
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作者 Liu Youcai Lin Qingquan +4 位作者 Li Lifeng Fu Jiangang Zhu Zhongsi Wang Chongqing Qian Dong 《International Journal of Mining Science and Technology》 SCIE EI 2014年第4期567-571,共5页
In order to utilize low-grade manganese ore resources effectively, a hydrometallurgical process was developed for manganese extraction in dilute sulfuric acid medium, and the kinetics of leaching manga- nese was also ... In order to utilize low-grade manganese ore resources effectively, a hydrometallurgical process was developed for manganese extraction in dilute sulfuric acid medium, and the kinetics of leaching manga- nese was also investigated. At room temperature, manganese from low-grade manganese carbonate ores was extracted by sulfuric acid leaching without reductants. During the extracting process, single-factor analysis method was used to evaluate the effects of grinding fineness, sulfuric acid concentration, liquid-to-solid ratio, agitation rate and leaching time on the leaching efficiencies of Mn and Fe. The optimal leaching conditions are determined as coarse particles of below 2 mm size (without ball-milling), sulfuric acid concentration of 0.86 mol/L, liquid-to-solid ratio of 5:1, agitation rate of 150 r/rain and leaching for 180 min at room temperature. Under the optimal conditions, the leaching efficiencies of Mn and Fe are 96.21g and 13.35%, respectively. In addition, through the experiments at different temper- atures, it is found that the leaching process follows the shrinking core model under the conditions of changing acid concentration and intermittent reaction device. Moreover, the apparent activations of effective diffusion and chemical reaction in the kinetic model are calculated to be 18.83 and 27.15 kJ/mol, respectively. 展开更多
关键词 Low-grade manganese ore Leaching Kinetics Model
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Acid leaching decarbonization and following pressure oxidation of carbonic refractory gold ore 被引量:1
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作者 张杜超 肖庆凯 +3 位作者 刘伟锋 陈霖 杨天足 刘又年 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第7期1584-1590,共7页
Carbonate decomposition of carbonic refractory gold ore and the following pressure oxidation were studied.In the carbonate decomposition procedure,the effects of liquid-to-solid ratio and reaction time on decompositio... Carbonate decomposition of carbonic refractory gold ore and the following pressure oxidation were studied.In the carbonate decomposition procedure,the effects of liquid-to-solid ratio and reaction time on decomposition ratio of carbonate were investigated.The experimental result shows that the decomposition ratio of carbonate is 98.24%under the conditions of liquid-to-solid ratio of 5:1,Fe^(3+)concentration of 20 g/L,sulfuric acid concentration of 20 g/L,reaction temperature of 80 ℃ and reaction time of 2 h.Then,the slurry obtained from carbonate decomposition was put into the titanium autoclave for pressure oxidation leaching.Effects of liquid-to-solid ratio,temperature,time and oxygen partial pressure on sulfur oxidation ratio were studied during pressure oxidation.With the prolonged time,pyrite and arsenopyrite are oxidized to ferric subsulfate,hydrated ferric sulfate and jarosite,resulting in the increasing residue ratio.The residue ratio and the sulfur content in the residue can be decreased by ferric subsulfate dissolution.The oxidation ratio of the sulfur is 99.35% under the conditions of oxidation time of 4 h,temperature of 210 ℃,oxygen partial pressure of 0.8 MPa and stirring speed of 600 r/min. 展开更多
关键词 carbonic refractory gold ore carbonate decomposition pressure oxidation ferric subsulfate dissolution
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