Influence of Slag Composition and Viscosity on Diameter of Slag Wool Using Dimensional Analysis-Based Double-Spinning Model

Eun-Jin Jung; Sun-Joong Kim

doi:10.7844/kirr.2026.35.1.76

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2026 Vol.35, Issue 1 Preview Page Next Page

Research Paper

Influence of Slag Composition and Viscosity on Diameter of Slag Wool Using Dimensional Analysis-Based Double-Spinning Model 차원 해석 기반 더블 스피닝 모델을 활용한 슬래그울 직경에 대한 배합 조성 및 점도의 영향

28 February 2026. pp. 76-84

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Abstract

The present study implemented a proposed double-disc spinning model based on dimensional analysis to predict fiber diameters of mineral wool. The reliability of the model was validated using fiber diameter data from 19 different mineral wool compositions manufactured from various raw materials including basalt, slag, and stone. Viscosity measurements of synthesized slag were experimentally conducted at 1773 K using Pt-Rh crucibles, and comparison with FactSage calculations showed good agreement for slag containing FeO. Model calculations revealed that when the melt viscosity was larger than approximately 15 Pa·s, measured and calculated fiber diameters showed similar values; however, the deviation between the two diameters increased with increasing viscosity. By optimizing composition of synthesized slag to adjust melt viscosity to approximately 1.5 Pa·s, it was predicted that fiber diameters of approximately 6 μm could be achieved. The results of this study are expected to serve as an important parameter for composition design in the manufacture of high-quality slag wool.

Keywords

Double-disc spinning model

dimensional analysis

fiber diameters

mineral wool

Viscosity

본 연구에서는 차원해석에 기반한 더블 스핀 모델을 구현하여 미네랄울의 섬유 직경을 예측하는 방법을 제시하였다. 현무암, 슬래그, 광석 등 다양한 원료로 제조된 19개 미네랄울 조성의 섬유 직경 데이터를 활용하여 모델의 신뢰성을 검증하였다. 실험적으로 Pt-Rh 도가니를 이용하여 1773 K에서 인조 슬래그의 점도를 측정하였으며, FactSage 계산값과의 비교를 통해 FeO 함유 슬래그에서 거의 일치함을 확인하였다. 모델 계산 결과, 용융물 점도가 약 15 Pa·s 이하일 때 섬유 직경의 측정값과 계산값이 유사한 경향을 보였으나, 점도가 높아질수록 편차가 증가하는 것을 확인하였다. 인조 슬래그의 최적 배합을 통해 용융물 점도를 약 1.5 Pa·s로 조정할 경우 섬유 직경이 약 6 μm까지 도달 가능함을 예측하였다. 본 연구의 결과는 고품질 슬래그울 제조를 위한 배합 설계의 중요한 지표로 활용될 수 있을 것으로 판단된다.

키워드

더블 스핀 모델

차원해석

섬유 직경

미네랄울

점도

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Information

Publisher :The Korean Institute of Resources Recycling
Publisher(Ko) :한국자원리싸이클링학회
Journal Title :Resources Recycling
Journal Title(Ko) :자원리싸이클링
Volume : 35
No :1
Pages :76-84
Received Date : 2025-12-04
Revised Date : 2026-01-28
Accepted Date : 2026-01-30
DOI :https://doi.org/10.7844/kirr.2026.35.1.76

Resources Recycling ISSN:2765-3439(Print) 2765-3447(Online) 자원리싸이클링

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