Simulation of gas blowing slag in a hot metal ladle
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摘要: 設計噴槍置于鐵水包后部(相對于扒渣嘴),在扒渣開始前,通過此噴槍向鐵水內噴吹氣體,氣體上浮后排開一定面積渣層,使表面渣向扒渣嘴方向聚集,為下一步扒渣機的操作提供便利條件,從而減少扒渣次數,提高效率,降低鐵損.使用1:3.5比例設計鐵水包水模型,模擬不同工況下,氣體排渣的效果.同時采用數值模擬的方法驗證水模實驗結果.實驗表明噴槍浸入深度從200mm變到400mm,無渣比(無渣區域占總面積的百分比)從10%增加到30%;氣體流量從4m3·h-1變到6m3·h-1,無渣比從30%增加到37%.說明浸入深度越大,吹氣量越大,排渣的效果越好.數值模擬與水模型符合較好.Abstract: A new type of spray gun was placed at the wall of a hot metal ladle (relative to the outlet of slag removal). Before slag removal, high pressure N2 was injected and floated, and slag on the ladle surface was pushed aside to the ladle outlet. The operation is positive to removing slag from the ladle, the efficiency improves, and the loss of hot metal and the time of slag removal decrease. A model in a proportion of 1:3.5 was made to simulate the hot metal ladle. Air was injected to blow slag. The simulation was operated with various parameters. At the same time, numerical simulation was made to testify the result. It is shown that when the submerged depth varies from 200 mm to 400 mm, the ratio of lack-slag area to sum area rises from 10% to 30%. When the flux of gas changes from 4 m3·h-1 to 6 m3·h-1, the ratio of lack-slag area to sum area increases from 30% to 37%. The increases of submerged depth and gas-blowing flux are positive to the quantity of slag removal. The result of water modelling is well accorded with the numerical simulation.
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Key words:
- hot metal ladle /
- slag removal /
- spray gun /
- water modelling /
- numerical model
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