RH精炼去除微小夹杂物毕业论文

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1、 本科生毕业论文 第 I 页 RH 精炼去除微小夹杂物 摘 要 随着科技的进步对钢的洁净度就提出了更高的要求。控制夹杂物就成为了一个重要的研究项目，作为炉外精炼有效手段的 RH 精炼的研究就非常必要了。主要阐述了洁净钢概况、 RH 技术的发展、 RH 精炼夹杂物概况和去除夹杂物水模实验研究。实验模型在几何相似比 =1:4、 聚丙烯作为模拟夹杂物和 NaHCO3 作为模拟 CaCO3 的模型上进行水模实验，研究了上升腿中提升气量、上升腿浸入钢液深度和向钢包中加入 NaHCO3 的量对去夹杂物的影响，得出结论如下： 1）较大提升气量的去夹杂物效果好于较小提升气量 的，但是存在一个最优值。 2） 从

2、去夹杂物的角度考虑，浸入深度存在一个最优值。 3）从去夹杂角度，并考虑成本和引入新杂质量等因素 。 4） 实验中向钢包中加入 NaHCO3对夹杂物的去除有所提升，去除率从 78.26%提升到 85.41%，去除率提升了 7.15%。 关键字： 洁净钢； RH 真空精炼；夹杂物；水模 本科生毕业论文 第 II 页 ABSTRACT With the progress of science and technology, advanced industrial products quality of high-end increasing, the cleanliness of steel put

3、s forward higher request. Control inclusion is an important research target, as an effective means refining outside the furnace of RH is very necessary to study.This paper expounds the general situation, clean steel RH the progress of the technology, RH refining inclusion profile and removing water

4、model experiment research inclusions. The experiment model in Ansteel the third factory 175t RH-TB as the prototype, the geometric similar ratio() is 1:4, polypropylene as simulation inclusion and NaHCO3 as simulation of CaCO3 on model of water model experiment, the air of the up leg into the liquid

5、 steel ladle depth and add to the amount of NaHCO3 to go to the influence of the inclusion, draw the conclusion is as follows:1) larger gas ascension to inclusion works better than a smaller gas ascension, but there is a mos.2) on the view point of inclusion, immersion depth exist a best value. 3) o

6、n the view point of inclusion, and consider the cost and introducing new miscellaneous quality factors, NaHCO3 optimal inputs is 120 mol, equivalent to 806 of the prototype data is mol CaCO3；4) add NaHCO3 to ladle in the experiment to remove the inclusions had increased, from the removal rate 78.26%, rising to 85.41%, removal rate up 7.15%. Key words:Clean steel； RH vacuum degasser； inclusions； NaHCO3； water modeling