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建立了中间包1∶3水力学模型,对某厂连铸中间包由28 t扩容至40 t后,进行中间包结构优化。通过分析中间包挡墙、挡坝和覆盖剂作用,研究了中间包结构对夹杂物去除的影响规律。夹杂物去除物理模拟与计算结果均表明:粒子粒度分别为-30~-50、-50~-80、-80~-100、-100~-180和-180~-300目时,在中间包基本结构下,夹杂物去除率分别为97.9%、75.7%、64.0%、60.3%和56.3%,相比于中间包基本结构,挡坝内移1 cm对于各种尺寸的夹杂物的去除率均有提高,各尺寸夹杂物的去除率分别为98.7%、82.3%、66.6%、62.9%、57.4%;用混合油模拟中间包覆盖剂,各尺寸夹杂物的去除率分别为98.9%、87.43%、75.14%、70.0%、63.4%,中间包夹杂物的去除率进一步提高。实际生产过程中,中间包改造后,夹杂物尺寸变小,夹杂物数量明显减小,夹杂物的数量较中间包改造前减少了53%。
The tundish 1: 3 hydraulics model was established, and the tundish structure was optimized after a tundish tundish was expanded from 28 t to 40 t. By analyzing the effect of tundish retaining wall, retaining dam and covering agent, the influence of tundish structure on inclusion removal was studied. The physical simulation and calculation results of inclusion removal show that the particle size is -30 ~ -50, -50 ~ -80, -80 ~ -100, -100 ~ -180 and -180 ~ -300 mesh, The removal rates of inclusions in the basic structure are 97.9%, 75.7%, 64.0%, 60.3% and 56.3% respectively. Compared with the basic structure of the tundish, The removal rates of inclusions of various sizes were 98.7%, 82.3%, 66.6%, 62.9% and 57.4%, respectively. The removal rates of inclusions of various sizes were 98.9% and 87.43% , 75.14%, 70.0% and 63.4%, respectively. The removal rate of inclusions in tundish increased further. In the actual production process, after the transformation of the tundish, the size of the inclusions becomes smaller, the number of inclusions is obviously reduced, and the number of inclusions is reduced by 53% compared with that before the tundish transformation.