Abstract

The urgent problem regarding the depletion of mineral resources in ferrous metallurgy can be efficiently solved by a complex reuse of man-caused waste products. Such wastes are mostly presented by electric arc furnace (EAF) slag and ladle furnace (LF) slag. These two kinds of slag are not completely utilized. The residues of these slags are stored in dumps of enterprises and thereby pollute the environment. However, the residues of EAF and LF slags can be converted into valuable industrial products by interaction between the slag components. This paper presents the studies concerning joint wasteless processing of EAF and LF slags with the obtaining of Portland cement clinker and pig iron. Description of the disadvantages of industrial methods for processing these slags is considered, and the relevance of ladle slag processing is shown. The mathematical simulation results of slag fluidity, depending on the composition, are presented, which are based on real investigations, as well as its described experimental technique. The chemical composition of the charge mixtures making it possible to process these slags with limestone roasting wastes into complete extent with no residue has been determined. Such processing provides the quality of produced cast iron and Portland cement clinker to meet the requirements of normative documents. Results for measuring the viscosity of different slag compositions, a description of the obtained slag phases, as well as its final temperature mode, are presented. The results of experimental-industrial tests performed for the developed processing technology are considered, and complete flow chart involving the use of tilt rotary furnaces is presented.

中文翻译：

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钢包炉和电弧炉炉渣的无废联合处理

摘要

通过人为废品的复杂再利用，可以有效解决黑色冶金矿产资源枯竭的紧迫问题。此类废物主要以电弧炉（EAF）炉渣和钢包炉（LF）炉渣为代表。这两种炉渣都没有被完全利用。这些炉渣的残渣储存在企业的垃圾场中，从而污染环境。然而，EAF 和LF 炉渣的残留物可以通过炉渣成分之间的相互作用转化为有价值的工业产品。本文介绍了有关通过获得波特兰水泥熟料和生铁对 EAF 和 LF 炉渣进行联合无废处理的研究。考虑了处理这些渣的工业方法的缺点的描述，并显示了钢包渣处理的相关性。给出了渣流动性的数学模拟结果（取决于成分），这些结果基于实际调查及其所描述的实验技术。已确定炉料混合物的化学成分，可以将这些炉渣与石灰石焙烧废料一起处理到完全无残留的程度。这种处理使生产的铸铁和硅酸盐水泥熟料的质量符合规范文件的要求。给出了测量不同炉渣成分的粘度的结果、获得的炉渣相的描述及其最终温度模式。考虑了为开发的加工技术进行的实验工业测试的结果，并提供了涉及使用倾斜旋转炉的完整流程图。