Mieke Campforts

Abstract: One of the main factors limiting the lining lifetime in pyrometallurgical smelters is continuous refractory oxides dissolution in the slag bath. The overall wear is accelerated when the slag infiltrates the porous brick and the dissolution thus occurs in a larger part of the lining. This work investigates the possibility of preventing deep infiltration by sealing off the pores with newly formed phases. Static finger tests at constant temperature (1200 °C) were performed in contact with a synthetic non-ferrous PbO–SiO 2 –MgO slag, showing the formation of forsterite (Mg 2 SiO 4 ) throughout the refractory sample by the reaction between SiO 2 (slag) and MgO (refractory). This phase grows with time, eventually sealing off the pores near the interface with the bath. The phase grows too slow to prevent full infiltration of the refractory but creates an equilibrium state in the sealed off part of the sample, ceasing the chemical corrosion in that part of the sample.

TL;DR: In this article, the microstructure of an industrial nonferrous slag with Al2O3-CaO-FeOx-MgO-SiO2-ZnO was examined using scanning electron microscopy, electron probe microanalysis, and X-ray diffraction.

TL;DR: In this article, the interaction between spinel solids and Cu-droplets is investigated in an industrially relevant slag system (PbO-CaO-SiO2-Cu2O-Al2O3-FeO-ZnO) using two complementary experimental set-ups.

TL;DR: In this paper, the authors developed a technique based on the submergence of a water-cooled probe into a liquid slag bath, and their results demonstrate that the technique is a successful tool in obtaining information on the growth, microstructure, and composition of freeze linings in industrial watercooled furnaces.

TL;DR: In this paper, the freeze-lining formation of six synthetic lead slags is studied using a cooled-probe technique and their microstructures are characterized using light optical microscopy (LOM) and microprobe analysis.