ABSTRACT

It is of great significance to improve the yield of ferroalloy for steelmaking to reduce cost and save energy. In this paper a kind of loss mechanism of micro-carbon ferromanganese which has micro content of carbon during RH refining of interstitial free steel was investigated. The flow field of argon gas in the RH degassing vessel was investigated through numerical simulation. Through force analysis and particle tracking of the micro-carbon ferromanganese, it was found that micro-carbon ferromanganese with size smaller than the critical value of 1.01 millimeters has a large probability to be carried away into the RH vacuum pipeline. The micro-carbon ferromanganese of small particle was easily lost into the vacuum pipe by the upward flow of argon gas. Industrial experiment was conducted and a novel mechanism was confirmed that increasing the vacuum pressure during addition of the micro-carbon ferromanganese could improve the yield greatly.

摘要

提高炼钢用铁合金的收率对降低成本、节约能源具有重要意义。本文研究了一种含微量碳的微碳锰铁在无间隙钢RH精炼过程中的流失机理。通过数值模拟研究了RH脱气容器中氩气的流场。通过对微碳锰铁的受力分析和粒子追踪发现，粒径小于临界值1.01毫米的微碳锰铁极有可能被带入RH真空管道。小颗粒的微碳锰铁很容易被氩气向上流动而流失到真空管中。