鋼鐵冶金過程中的界面現象

程禮梅; 張立峰; 沈平

doi:10.13374/j.issn2095-9389.2018.10.001

鋼鐵冶金過程中的界面現象

doi: 10.13374/j.issn2095-9389.2018.10.001

1) 北京科技大學冶金與生態工程學院, 北京 100083;
2) 上海大學材料科學與工程學院, 上海 200072

基金項目:

國家自然科學基金資助項目(51725402,51504020和51704018)

詳細信息

中圖分類號: TF4
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出版歷程
- 收稿日期: 2017-10-11

Interfacial phenomena in ironmaking and steelmaking

1) School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2) School of Material Science and Engineering, University of Shanghai, Shanghai 200072, China

摘要

摘要: 從界面潤濕性的角度,對一些冶煉過程中的常見界面現象進行了詳細分析.對于渣的泡沫化過程,主要分析了潤濕性對渣的泡沫化指數的影響;對于鐵水和鋼液脫硫過程,主要分析了對脫硫速率和脫硫劑的利用率以及穿透鋼液速率的影響;對于鋼液與熔渣對耐火材料的侵蝕過程,主要分析了對耐火材料在熔渣中的飽和溶解度、熔渣在耐火材料中的侵蝕深度以及耐火材料的侵蝕速率的影響;對于鋼中夾雜物的運動過程,主要分析了對鋼中夾雜物的形核、聚集、去除、空間分布等影響.同時,本文總結得出了對于這些實際冶煉過程有利的界面潤濕性.
- 潤濕性 /
- 泡沫渣 /
- 耐火材料侵蝕 /
- 夾雜物形核 /
- 夾雜物去除
Abstract: A number of important links in the metallurgical production process are related to interface phenomena, including slag foaming, hot metal desulphurization, refractory erosion, converter blowing, the behavior of inclusions in steel, and so on. Interfacial wettability is an important aspect of the interfacial interaction. By controlling the interfacial wettability between two phases, it is possible to remove inclusions, improve the cleanliness of the molten steel, reduce erosion of the refractory material, improve the life of the lining material, and ensure smooth production and product quality. Thus, it is necessary to analyze interfacial phenomena in ironmaking and steelmaking with respect to interfacial wettability. In general, interfacial wettability can be measured by the contact angle and interfacial tension, and the contact angle and interfacial tension between the molten steel and slag are determined primarily by the surface active element in molten steel and the active surface component in slag. In this study, we analyzed in detail some common phenomena in the steelmaking process from the view of interfacial wettability. With respect to the slag foaming process, we mainly analyzed the effects of the contact angle and interfacial tension on the slag foaming index. To study the hot metal desulphurization process, we considered effects on the desulfurization rate and the utilization and penetration speed of the desulfurizing agent. Regarding the refractory erosion process by molten slag and steel, we primarily studied the effects on the refractory saturation slubility in molten slag, the penetration depth of molten slag in refractory material, and the refractory erosion rate. To study the behavior of inclusions in steel, we considered effects on the nucleation, aggregation, removal, and spatial distribution homogeneity of inclusions. We also summarized the conditions associated with better interfacial wettability with respect to the corresponding phenomena.
- wettability /
- slag foaming /
- refractory erosion /
- inclusion nucleation /
- inclusion removal

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