Abstract

Ladle refining is a popular secondary metallurgy process and plays a vital role in achieving the desired chemistry and temperature during steelmaking. The slag produced after ladle refining mostly contains dicalcium silicate (C2S). The presence of high C2S in slag leads to the disintegration of slag into fine powder during cooling due to phase transformation of C2S. The adverse impact is that the dust is easily aerated and carried by wind creating environmental pollution and makes the working area unsafe. In this paper, an attempt was made to study the effect of the addition of different additives on the disintegration of slag. Initial laboratory experiments were conducted with different additives such as Colemanite (boron-based mineral), silica-rich synthetic slag, and a siliceous natural occurring mineral perlite. Analysis of slag samples was carried out before and after treatment with additives. Based on the optimized conditions, industrial trials were conducted with different additives, and its success was measured in terms of lumpy slag formation. It was successfully studied that the addition of 10% of perlite during ladle furnace treatment process helped in preventing the slag disintegration by 90%.

Graphical Abstract

中文翻译：

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通过不同炉渣添加剂防止钢包炉炉渣分解

摘要

钢包精炼是一种流行的二次冶金工艺，对炼钢过程中达到所需的化学温度和温度起着至关重要的作用。钢包精炼后产生的炉渣主要含有硅酸二钙（C2S）。炉渣中高C2S的存在会导致炉渣在冷却过程中由于C2S的相变而分解成细粉。不利的影响是，灰尘容易被风吹散和携带，从而造成环境污染，并使工作区域不安全。在本文中，试图研究添加不同添加剂对炉渣分解的影响。最初的实验室实验是使用不同的添加剂进行的，例如Colemanite（硼基矿物），富含二氧化硅的合成矿渣和硅质天然矿物珍珠岩。在用添加剂处理之前和之后对炉渣样品进行分析。基于优化的条件，使用不同的添加剂进行了工业试验，并根据结块的形成来衡量其成功。成功地研究了在钢包炉处理过程中添加10％的珍珠岩有助于防止90％的炉渣崩解。

图形概要