Estimating the density of molten CaF2-Al2O3-CaO slags based on optical basicity

Q2 Materials Science

Minerals & Metallurgical Processing Pub Date : 2016-05-01 DOI:10.19150/MMP.6625

B. Birol, M. N. Saridede

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引用次数: 0

Abstract

Slag density is a significant factor in determining the process efficiency of the electroslag remelting (ESR) process, where calcium fluoride (CaF2)-based slag is formed synthetically to refine metal ingots. Although there are some former studies investigating the density of CaF2-containing slags, the prediction models focusing on them are applicable only to some specific systems. The present study aims to build a model to predict density for a wide range of CaF2-containing ESR slags. To investigate density for various slag compositions, CaF2-Al2O3-based and CaF2-Al2O3-CaO-based slag compositions were prepared. Additionally, some minor constituents like FeO, MgO and MnO were added to a 5:3:2 CaF2-Al2O3-CaO slag in order to investigate the effects of these constituents on the slag. The volumes of the prepared slags were measured in a tube furnace at 1450–1550 °C using the sessile drop technique, and their densities were calculated. The results showed that for the slags, density is related to optical basicity, and therefore a prediction model based on an Arrhenius equation was built. The model was tested with data from literature, and its limitations and validity are discussed.

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基于光学碱度的CaF2-Al2O3-CaO熔渣密度估算

渣密度是决定电渣重熔(ESR)工艺效率的重要因素。电渣重熔是通过合成氟化钙(CaF2)基渣来精炼金属锭的工艺。虽然已有一些研究对含caf2渣的密度进行了研究，但以其为重点的预测模型仅适用于某些特定体系。本研究旨在建立一个模型来预测广泛含caf2的ESR渣的密度。为考察不同矿渣成分的密度，分别制备了caf2 - al2o3基矿渣和caf2 - al2o3 - cao基矿渣。此外，在5:3:2 CaF2-Al2O3-CaO渣中添加FeO、MgO和MnO等微量成分，考察了这些成分对渣的影响。在1450-1550°C的管式炉中，采用固滴法测量了所制备的炉渣的体积，并计算了其密度。结果表明，对于矿渣，密度与光碱度有关，因此建立了基于Arrhenius方程的预测模型。用文献数据对模型进行了检验，并对其局限性和有效性进行了讨论。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Minerals & Metallurgical Processing 工程技术-矿业与矿物加工

CiteScore

0.84

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： For over twenty-five years, M&MP has been your source for the newest thinking in the processing of minerals and metals. We cover the latest developments in a wide range of applicable disciplines, from metallurgy to computer science to environmental engineering. Our authors, experts from industry, academia and the government, present state-of-the-art research from around the globe.