检索结果-南通市图书馆

Industrial application of the technique of removing Mo by a combination of moving packed bed and fluidized bed ion exchange

引用

Rare Metals 2003年第2期22卷 81-85页

作者： XIAO Liansheng, ZHANG Qixiu, GONG Bofan, and HUANG ShaoyingMetallurgical Separation Science and Engineering Lab., Central South University, Changsha 410083, China (Received 2002-05-08) Metallurgical Separation Science and Engineering Lab. Central South University Changsha 410083

The application of the technique of removing molybdenum by moving packed bedand fluidized bed ion-exchange in a factory was described. The data showed that the Mo removalefficiency is above 99 percent, and the Mo content in APT (Ammonium Paratungstate) is controlledsteadily below 18 X l0^(-6), in the case of treating the feed liquor containing Mo 1.4 g/L. Thetechnique is simple and convenient in operation, good reusability of resin, loss consumption ofdesorption reagent and little pollution on environment. The loss of tungsten is less than 0.5percent. The technique bas been proved to be an economical and efficient process for Mo removal.

关键词： non-ferrous metallurgy separation ion-exchange moving packed bed fluid bed molybdenum tungsten.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Leaching process of germanium oxide dust

引用

Rare Metals 2008年第6期27卷 555-559页

作者： LIANG Jie WANG Hua Department of Materials and Metallurgical Engineering Kunming University of Science and Technology Kunming 650093 China Chemistry Department Bo＇ie University Bijie 5511700 China

A thermodynamic analysis on the acid leaching process of germanium oxide dust and discussion on the behaviors of main substances of the dust in the leaching process were carried out. The effects of temperature, acid concentration, leaching time and stirring speed on the leaching rate of germanium were investigated. Based on the characteristic of the dust, the kinetics and reactive mechanism of acid leaching were studied. The results show that the leaching of the dust by acid belonged to ＂the unreacted core shrinking model＂ of producing solid outgrowth layer. The chemical reaction was controlled by inner diffusion process. The apparent activation energy of leaching process was 12.60 kJ/mol. The leaching reaction of germanium was determined to be mainly second order reaction. The optimum conditions were the reaction temperature of 363 K, the leaching time of 2.5 h, the stirring speed of 120 r/min, the solid-to-liquid ratio of 1/8 and the acid concentration of 120 g/L. Under these conditions, the leaching rate of germanium can come up to more than 87%.

关键词： non-ferrous metallurgy leaching process kinetics metallurgical principle germanium oxide dust thermodynamics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A decomposing technique for scheelite concentrate and low-grade scheelite concentrate

引用

Rare Metals 2004年第2期23卷 115-119页

作者： HUO Guangsheng SUN Peimei LI Honggui LI Yunjiao ZHAO Zhongwei SUN Zhaoming LIU Maosheng School of metallurgy Science and Engieering, Central South University, Changsha 410083, China School of metallurgy Science and Engineering Central South University Changsha 410083 China

The effect of different decomposition conditions on tungsten recovery forscheelite concentrate has been examined. The results show that tungsten recovery can be more than98% under decomposing conditions as follows: the amount of caustic soda is 2.2 and 3.2 times oftheoretical respectively, ratio of water and ore is 0.7-0.8, temperature is 160℃, and preservationtime is 2.0 h for scheelite concentrate (63.21 % WO_3) and low grade scheelite concentrate (55.17%WO_3).

关键词： non-ferrous metallurgy caustic soda digestion scheelite concentrate lowgrade scheelite concentrat

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：