Picture analysing method of slag foaming behaviour

Hot tests of foaming behaviour of steelmaking slags were conducted on a lab oratory scale up to 1760 degreesC using a Tammann furnace. The foaming beha viour of the slags was quantified on the basis of a new measuring method. T he volume increase and the progress of the foaming process can be continuou sly observed and calculated by means of picture analysis. The gas content o f foaming slags was compared with the results of the measurements performed in steel plants. The influence of the magnesia content on the foaming beha viour is investigated. The chemical composition of the slag is beside the C O evolution the decisive factor influencing slag foaming behaviour. The hig hest volume increase values observed lie in the region of 2500 % in relatio n to the initial volume.