检索结果-南通市图书馆

Alkaline extraction characteristics of steelmaking slag batch in nh_4cl solution under environmental pressure

Journal of Central South University 2013年第6期20卷 1482-1489页

作者：张慧宁徐安军贺东风崔健 State Key Laboratory of Advanced Metallurgy (University of Science and Technology Beijing) School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Ningbo Iron and Steel Co Ltd.

In order to obtain better carbonation effect, extraction behavior of slag batch is necessary to study. Relevant parameters like selective extraction yield were originally discussed. The relationship between selective extraction yield and conversion ratio was systemically focused on. The results show that alkaline earth metal conversion ratio is changed with leaching time and nh4CI concentration by first order exponential, and the maximum conversion for calcium keeps about 68% at 120 min in 0.4 mol/L nh4C1 solution, while leaching temperature and particle size have a linear effect on conversion ratio. Selective extraction yield of calcium is more than 93%, and the value of Mg is less than 5%. Apparent layer bands of silicon and calcium appear in the surface area through morphology detection of slag after leaching, and the case for 38-75 μm slag batch is more obvious than 75 150 μm slag and slag with larger particle size when leaching in 0.4 mol/L nh4cl solution for 90 rain at 60 ℃.

关键词： steel slag alkaline leaching nh4cl solution selective extraction yield conversion ratio

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

Application of Vacuum Drying to Silica Sol Ceramic Mold

引用

Journal of Materials Science & Technology 2008年第2期24卷 233-235页

作者： Ming ZENG Xinqiang YUAN Baoluo SHEN Yunqiu ZHENG School of Materials Science and Engineering Sichuan University Chengdu 610065 China School of Materials Science and Engineering Shaanxi University of Technology Hanzhong 723003 China School of Materials Science and Engineering Xihua University Chengdu 610039 China Department of English Xichang College Xichang 615022 China

Silica sol ceramic mold was made at room temperature with JN-30 silica sol, silica powder and nh4cl. It is found that the harden time of silica sol ceramic mold is only 0.5 to 1.5 h under the amount of nh4cl solution of 7% to 8% with 15% concentration, and less surface cracks occur by using vacuum drying. The proper vacuum drying process parameters： vacuum drying temperature is 80 to 100℃, drying time is 5 h and vacuum is 0.06 to 0.07MPa. The harden mechanics, vacuum drying mechanics and the reason of less surface cracks of silica sol ceramic mold by vacuum drying： were also analyzed in this paper.

关键词： Silica sol Ceramic mold Vacuum drying nh4cl solution

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

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

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：