Rapid Dissolution of Quicklime into Molten Slag by Internally Formed Gas
详细信息 查看全文
- 作者：Nobuhiro Maruoka ; Hiroshi Nogami
- 刊名：Metallurgical and Materials Transactions B
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：48
- 期：1
- 页码：113-118
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Metallic Materials; Characterization and Evaluation of Materials; Structural Materials; Surfaces and Interfaces, Thin Films; Nanotechnology;
- 出版者：Springer US
- ISSN：1543-1916
- 卷排序：48
文摘
In steelmaking process, quicklime is used to produce CaO-based slag. Although rapid dissolution of quicklime is required for high-efficiency refining, it is known that the rate decreases when dicalcium silicate (C2S) layer forms around the quicklime by reacting with slag. The equation that driving force is the difference of CaO content between in slag and a liquid phase of slag saturated by C2S has been often used for estimating the dissolution rate of lime, in which this saturated value is thermodynamically determined. The authors, however, revealed that the quicklime used in actual operation showed much faster dissolving rate than that of completely calcined lime that is covered by C2S layer during dissolution into slag. This was caused by a gas formation due to a thermal decomposition of residual limestone existed in quicklime. In this study, the dissolution rate of quicklime with the gas formation is quantitatively investigated.