铁水包吹气排渣过程的模拟

设计喷枪置于铁水包后部(相对于扒渣嘴),在扒渣开始前,通过此喷枪向铁水内喷吹气体,气体上浮后排开一定面积渣层,使表面渣向扒渣嘴方向聚集,为下一步扒渣机的操作提供便利条件,从而减少扒渣次数,提高效率,降低铁损. 使用1:3.5比例设计铁水包水模型,模拟不同工况下,气体排渣的效果. 同时采用数值模拟的方法验证水模实验结果. 实验表明喷枪浸入深度从200mm变到400mm,无渣比(无渣区域占总面积的百分比)从10%增加到30%;气体流量从4m~3·h~(-1)变到6m~3·h(-1),无渣比从30%增加到37%. 说明浸入深度越大,吹气量越大,排渣的效果越好. 数值模拟与水模型符合较好.

Simulation of gas blowing slag in a hot metal ladle

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 N_2 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 200mm to 400mm, the ratio of lack-slag area to sum area rises from 10% to 30%. When the flux of gas changes from 4m~3·h~(-1) to 6m~3·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.