利用超重力分離鋁熔體中的夾雜顆粒

宋高陽; 宋波; 楊玉厚; 楊占兵; 李龍飛; 馬良

doi:10.13374/j.issn2095-9389.2018.02.007

利用超重力分離鋁熔體中的夾雜顆粒

doi: 10.13374/j.issn2095-9389.2018.02.007

宋高陽^1,2,
宋波^1, ,,
楊玉厚¹,
楊占兵¹,
李龍飛¹,
馬良²

1) 北京科技大學鋼鐵冶金新技術國家重點實驗室, 北京 100083
2) 河北工程大學材料科學與工程學院, 邯鄲 056038

基金項目:

國家自然科學基金資助項目（51234001）；河北省自然科學基金資助項目（E2018402098）

詳細信息

中圖分類號: TF19
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出版歷程
- 收稿日期: 2017-04-11

Separation of inclusion particles from aluminum melt by super gravity

1) State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
2) College of Materials Science and Engineering, Hebei University of Engineering, Handan 056038, China

摘要

摘要: 利用Al-17% Si-4.5% Cu熔體中密度較小的初生硅顆粒模擬金屬熔體內部的夾雜物，并采用超重力場分離熔體中的夾雜顆粒，研究了不同重力系數條件下，金屬熔體中夾雜物的分離規律.實驗結果表明：經過超重力處理后，初生硅顆粒在試樣上部區域發生明顯的偏聚現象，試樣內部出現無初生硅顆粒區域，且隨著重力系數的增加，無初生硅顆粒的區域面積逐漸增大，說明重力系數越大，硅顆粒在試樣上部區域的聚集程度越好.隨著重力系數的增大，試樣的凈化效率逐漸升高，當重力系數（G）為500時，試樣的凈化率達到了84.98%.利用DPM離散相模型對超重力場下熔體內部硅顆粒的具體受力情況進行分析，并模擬研究鋁熔體內部硅顆粒在不同重力場中的分離行為.數值模擬結果證明了夾雜顆粒在沿著超重力方向上的運動行為近似符合Stokes運動定律.這表明超重力場可以有效分離金屬熔體中的夾雜物.
- 超重力 /
- 鋁熔體 /
- 夾雜顆粒 /
- 定向分離 /
- 運動行為
Abstract: The increasing demand for high-quality aluminum alloys in the automobile industry and other manufacturing fields has motivated manufacturers to produce cleaner aluminum alloys. However, conventional methods can barely meet the cleanliness requirements of many applications due to their low removal efficiencies. To develop an innovative and highly efficient method for separating inclusions from aluminum melt, this study investigated the separation behavior of silicon particles by super gravity under different gravity fields using the primary silicon particles of Al-17%Si-4.5%Cu melt to simulate the inclusions in molten metal. The experimental results show that primary silicon particles accumulate in the upper region of samples obtained by super gravity, while the area in which there are no primary particle appears in the sample. The accumulation effect of the silicon particles improves as the gravity coefficients increase. In addition, the purification efficiency of samples obtained by super gravity increases as the gravity coefficient increases. This paper found the purification efficiency of samples to reach 84.98% at a gravity coefficient of G=500. Using the discrete phase model (DPM), the paper also analyzed the forces acting on the particles in the melt and simulated the separation behavior of silicon particles in the melt under various gravity fields. The simulation results indicate that the movement of silicon particles along the direction of super gravity approximately obeys Stokes' law. There results demonstrate that inclusion particles in aluminum melt can be separated effectively by super gravity.
- super gravity /
- aluminum melt /
- inclusion particles /
- directional separation /
- movement

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參考文獻(17)

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