ORCID Profile
0000-0003-1221-2935
Current Organisation
UMICORE R&D
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Publisher: Walter de Gruyter GmbH
Date: 12-07-2018
DOI: 10.3139/146.111638
Publisher: Elsevier BV
Date: 05-2020
Publisher: Informa UK Limited
Date: 13-09-2017
Publisher: Elsevier BV
Date: 07-2023
Publisher: Wiley
Date: 23-10-2015
DOI: 10.1111/JACE.13991
Publisher: MDPI AG
Date: 29-12-2020
DOI: 10.3390/MET11010055
Abstract: Vapor explosions have been investigated both theoretically and experimentally for several decades, focusing either on the vapor film, or on mechanical aspects. Where the main interest for industry lies in the safety risks of such an event, fundamental research is focusing on all partial processes that occur during a vapor explosion. In this paper, vapor explosions are discussed from a heat transfer point of view. Generally accepted knowledge of heat transfer between hot surfaces and liquids is compared to early investigations regarding the origin of vapor explosions. Both steady state and transient models are discussed. The review of available literature suggests that vapor explosions trigger spontaneously by the collapse of the boiling film. Better understanding of the fundamental aspects of vapor explosions might give rise to future ideas on how to avoid them.
Publisher: Walter de Gruyter GmbH
Date: 12-05-2015
DOI: 10.3139/146.111201
Abstract: Phase equilibria in the ‘Cu 2 O’–‘Fe 2 O 3 ’–MgO–SiO 2 system in equilibrium with copper alloy have been investigated at temperatures between 1 100 and 1 250 °C. A high-temperature equilibration/quenching/electron probe micro-analysis technique has been used to accurately determine the liquid and solid compositions. The standard methodology has been modified to accurately determine the phase equilibria and liquidus in this particular chemical system. Results on phase equilibria in the tridymite primary phase field, including the tridymite–pyroxene, tridymite–spinel and tridymite–pyroxene–spinel phase boundaries, are reported. The study demonstrates the validity of the method and provides new data on the effect of MgO on the tridymite liquidus temperatures. Increasing MgO concentration was found to decrease the tridymite liquidus.
Publisher: Walter de Gruyter GmbH
Date: 06-2015
DOI: 10.3139/146.111234
Abstract: Phase equilibria in the ‘Cu 2 O’–‘Fe 2 O 3 ’–MgO – SiO 2 system in equilibrium with copper alloy have been investigated at temperatures between 1 075 and 1 250 °C. A high-temperature equilibration/quenching/electron probe micro-analysis technique has been used to accurately determine the liquid and solid compositions. Results on phase equilibria in the pyroxene and olivine primary phase fields are reported, providing new data on the effect of MgO on the liquidus temperatures in these fields. It was found that increasing MgO concentrations increases the liquidus temperatures in the olivine and pyroxene primary phase fields. The cuprite–delafossite–tridymite–pyroxene eutectic temperature of the quaternary system was determined to be between 1 075 and 1 080 ± 5 °C.
Publisher: Walter de Gruyter GmbH
Date: 15-05-2018
DOI: 10.3139/146.111621
Abstract: In pyrometallurgy, freeze lining technology is used to ensure the integrity of the furnace wall. This involves cooling down the wall and solidifying part of the liquid bath material onto the wall, creating a protective layer. In the current study, the cooled probe technique was used to perform a series of laboratory experiments, producing freeze linings under controlled conditions in the CuO x –FeO y –MgO–SiO 2 system. Earlier research has shown the bath–freeze lining interface temperature at thermal steady state can be at subliquidus temperatures under certain conditions. The current study focuses on the effect of bath temperature on this bath–freeze lining interface temperature and has indicated that increasing the bath temperature increases the interface temperature. Furthermore, the crystals forming the interface did not include the primary phase and formed a non-planar interface at thermal steady state.
No related grants have been discovered for Tijl Crivits.