Influence of Raw Material Type on Heat Transfer and Structure of Mould Slag
Influence of Raw Material Type on Heat Transfer and Structure of Mould Slag
复制标题
原料类型对结晶渣传热和结构的影响
DOI：
10.2355/isijinternational.51.1028
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发表时间：
2011-01-01
影响因子：
1.8
通讯作者：
Yu, Xiong
中科院分区：
文献类型：
--
作者：
Wen, Guang Hua;Zhu, Xin Bai;Yu, Xiong
研究了原料和配料比对结晶器渣的传热和结构的影响。根据不同的原料和配合比，设计了三组化学成分相同的结晶器渣。结果表明，原料对结晶器渣的粘度、熔点和晶相影响不大，但对结晶器的结晶形态和大小影响较大。炉渣中的硅灰石具有较高的结晶能力，从而促进了孔隙率较高的较厚的固体渣膜的形成，从而阻止了通过渣膜的强热流。与硅灰石相比，炉渣中的预熔物质具有抑制晶化过程的能力，从而形成尺寸均匀、颗粒细小的更薄的固体渣膜。实验证明，预熔保护渣具有良好的换热性能。
The effect of the raw materials and mixing ratio on the heat transfer and structure of mould slag was studied in the present paper. Three groups of mould slag with identical chemical composition were designed by various raw materials and mixing ratio. The result indicates that the raw material has minor effect on viscosity, melting point and crystalline phase of the mould slag; whereas, it affects the formation and size of crystal. The wollastonite in slag has higher crystallization capacity; therefore, it promotes the formation of thicker solid slag film with higher porosities and consequently prevents the strong heat flux through the slag film. Compared with wollastonite, prefused material in the slag has capability to restrain the crystallization process; hence, the thinner solid slag film with uniform size and finer grain is formed. The experiment proves that prefused mould powder has good performance on heat transfer.