权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

The measurements by the back surface laser flash method and the construction of the database on thermal conductivity of silicate melts.

硅酸盐熔体热导率背面激光闪光法测量及数据库构建

基本信息

批准号：
15560640
负责人：
OHTA Hiromichi
金额：
$ 2.05万
依托单位：
Ibaraki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560640/
关键词：
thermal conductivity thermal diffusivity silicate melts slag structure of melts laser flash method high temperature thermophysical properties 熱移動熱伝率導高温融体シリケート

项目摘要

In the metal refinement process, the request of environmental loading reduction has become intensified, and a grasp of the heat transfer phenomenon of the system is indispensable for the design. The measurement of the thermal property of silicate melt of the high temperature in the process is carried out in proportion to these requests. However, thermal conductivity thermal conductivity of the high-temperature region of the silicate melt which is one of the most important physical property in heat transfer of the refining process the measured value is greatly different by measuring method, and the value with the high reliability has not been obtained yet.In this study, this problem is approached from two directions. One is to evaluate the values derived in the conventional study and stores them into database. The other is to establish the measuring method with the high reliability based on the new principle.In this study, the thin platinum crucible is filled with the silicate melt sample, and the pulse heating is irradiated on the bottom surface of the crucible. The thermal conductivity of the alumina/silica/calcia system slag was measured by this technique from the temperature response of platinum crucible after irradiation. With the measured results and database, two models were examined. One is the model in which a heat propagates through the network of Si-O-Si of the silicate. The other is the model in which the heat transfer depends on the regularity of the structure in the melt.The model in which a heat propagates through the network of Si-O-Si does not explain the experimental result well. While the model that thermal conductivity depends on the regularity of the structure is rather effective considering that higher thermal conductivity at liquid state is observed in the vicinity of the corresponding composition of the crystal phases in solid state.

在金属精炼过程中，对环境负荷降低的要求越来越高，掌握系统的传热现象是设计不可缺少的。高温硅酸盐熔体的热物性测量正是根据这些要求进行的。然而，硅酸盐熔体高温区的导热系数是精炼过程传热过程中最重要的物理性质之一，测量方法测得的数值相差很大，目前还没有得到可靠性较高的数值。一种是对传统研究中得出的值进行评估，并将其存储到数据库中。二是在新原理的基础上建立高可靠性的测量方法。在本研究中，将硅酸盐熔体样品填充在薄的铂金坩埚中，并在坩埚的底部表面进行脉冲加热。利用该技术测量了氧化铝/二氧化硅/钙质系炉渣在辐照后的温度响应。结合测量结果和数据库，对两种模型进行了检验。一种是热通过硅酸盐的Si-O-Si网络传播的模型。另一种是热传递依赖于熔体内部结构的规律性的模型，热在Si-O-Si网络中的传播模型不能很好地解释实验结果。而导热系数依赖于结构规律性的模型是相当有效的，因为液态导热系数在相应的固态晶相组成附近观察到较高的导热系数。

项目成果

期刊论文数量（15）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Measurement of Physical Properties of Slag Formed Around The Raceway in The Working Blast Furnace

工作高炉滚道周围炉渣物理性质的测定

DOI：
发表时间：
2004
期刊：
ISIJ International 44
影响因子：
0
作者：
Shinichi Inaba;Yoshio Kmura;Hiroyuki Shibata;Hiromichi Ohta
通讯作者：
Hiromichi Ohta

H.Ohta H.Shibata, Y.Waseda: "Thermal Conductivity and Diffusivity of Molten Slags by Laser Flash Method"Metallurgical and Materials Transactions A. 36A(発表予定). (2006)

H.Ohta H.Shibata，Y.Waseda：“通过激光闪光法测量熔渣的热导率和扩散率”冶金和材料学报 A. 36A（待提交）。

DOI：
发表时间：
期刊：
影响因子：
0
作者：
通讯作者：

融体材料の熱拡散率測定(最新熱測定-基礎から応用まで-,八田一郎監修)

熔融材料的热扩散率测量（最新热测量 - 从基础知识到应用 -，由 Ichiro Hatta 监督）

DOI：
发表时间：
2003
期刊：
影响因子：
0
作者：
太田弘道;柴田浩幸;早稲田嘉夫
通讯作者：
早稲田嘉夫

太田弘道, 柴田浩幸, 早稲田嘉夫 (分担執筆:八田一郎監修・アルバック理工編集): "融体材料の熱拡散率測定(最新熱測定-基礎から応用まで-)"アグネ技術センター. 11(392) (2003)

Hiromichi Ota、Hiroyuki Shibata、Yoshio Waseda（特约作者：Ichiro Hatta 监督，ULVAC Science and Engineering 编辑）：“熔融材料热扩散率的测量（最新热测量 - 从基础知识到应用）”Agne 技术中心 11。 (392) (2003)