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首页> 外文期刊>Indian Foundry Journal >Investigation of Intermixing with the Use of Flow Modifiers in a Two-Strand Slab Caster Tundish
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Investigation of Intermixing with the Use of Flow Modifiers in a Two-Strand Slab Caster Tundish

机译：两流板坯连铸中间包内使用流动调节剂混合的研究

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摘要

Ladle Changeover during sequential casting process gives rise to intermixed grade steel in continuous casting tundish steelmaking process. With an aim to minimise the intermixed grade steel, flow modifiers were used in the bare tundish, Experimental investigation of the intermixing process was first carried out on bare tundish to validate with the numerically obtained results where the concentration of new grade steel is monitored at the outlet of the tundish in case of old ladle carrying old grade steel being replaced by new ladle with new grade steel. A close match was found between the experimental and numerically obtained results. The study was extended numerically to study the effect of flow modifiers like dam, turbo-stop and combination of dam and turbo stop on the intermixed amount in tundish. It was found that placement of dam before outlet resulted into decrease in the intermixed amount whereas placement of turbo stop at the bottom of the tundish below the inlet resulted in increase in the intermixed amount. When dam and turbo stop both were used in the tundish, the result was seen to be better than that by the dam. Three different heights of the turbo-stop and two different heights of dam were used in combination. It was found that height of the dams or turbo stop did not affect the intermixed amount significantly, Larger heights, however, produced slightly better results by producing less intermixed amount.
机译：在连续铸造中间包炼钢过程中，顺序铸造过程中的钢包转换产生了混合级钢。为了最大程度地减少混合级钢，在裸包中间包中使用了流动调节剂。首先对裸包中间包进行了混合过程的实验研究，以通过数值获得的结果进行验证，在该结果中对新等级钢的浓度进行了监测。如果用旧钢包装着旧钢水的旧钢包被新钢包换成新钢水包，则中间包的出口。在实验结果和数值获得的结果之间发现了紧密匹配。该研究在数值上进行了扩展，以研究水流调节剂（如水坝，涡轮止流以及水坝和涡轮止流的组合）对中间包内混合量的影响。已经发现，在出口之前放置坝会导致混合量减少，而在出口下方的中间包底部放置涡轮止动器会导致混合量增加。当在中间包中使用水坝和涡轮止流器时，结果被认为比水坝要好。组合使用了三种不同高度的涡轮增压器和两种不同高度的坝。已经发现，坝的高度或涡轮止动装置的高度不会显着影响混合量，但是，较高的高度则通过产生较少的混合量而产生了更好的结果。

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