Abstract:Problems of inclusions aggregation and nodulation often occur on the refractory wall during continuous casting,which not only reduce the production efficiency of continuous casting and the lifetime of refractory,but also affect the quality of casting billet. The aggregation and nodulation of Al2O3 inclusions on the MgO wall was analyzed and the chemical reaction adsorption model of Al2O3 inclusions and MgO wall surface was established. Model analysis results show that MgAl2O4 generated by chemical reactions can make inclusions with a radius of less than 42 μm be adsorbed on the wall,when the roughness of refractory wall was 3 μm and the contact time between inclusions and wall surface was 2×10-6 s. The chemical adsorption capacity for inclusions with a radius of 5 μm increased from 1.3×10-6 N to 2.8×10-6 N within 5×10-6 s. Inclusions that less than 3 μm were very easy to be combined together causing nodulation. The analysis results of the model have good applicability because they are in a good agreement with the results of the actual production.
收稿日期: 2015-09-06
出版日期: 2016-06-06
引用本文:
赵定国,李 新,王书桓,张文祥. 钢水中夹杂物与耐火材料的反应吸附行为[J]. 钢铁, 2016, 51(6): 47-52.
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