저항센서를 이용한 제강용 슬래그 두께측정 방안 연구

A study on the slag-thickness measuring system for steel making foundaries by using a resistivity detector.

용강 및 고온슬래그의 현저한 저항차를 이용한 제강용 슬래그 두께 측정시스템을 개발하기 위하여 시험용 저항센서형 검출소자 제작 및 측정시스템을 구성하고 측정실험을 통하여 저항센서형 슬래그 측정시스템의 효율 및 측정정도 측면에 대하여 분석하였다. 분석결과 용강 및 슬래그의 저항차는 $10^3$ order로 확인되었으며 용강 및 슬래그의 이러한 현저한 저항차를 이용하여 고정도로 슬래그 두께를 측정할 수 있음을 보여주었다.

In order to measure the thickness of the slag layer on the molten metal in the melting vessels for steel making foundaries, we manufactured the slag-thickness measuring system consisting of the probe and its driving system, which is based on the principle of detecting the change in the electrical resistivity. Experimental results show that there is a very wide difference of the electrical resistivity by the order of about $10^3$ between the molten metal and the hot slag and, hence, the air/slag and slag/molten metal interface can be exactly detected with the use of the probe which can be moved toward the melt. Therefore, it can be concluded that the proposed scheme of the slag measurement system in this study is Proven to be excellent in its efficiency and accuracy.