Karin Fjeldstad Jusnes


Karin Fjeldstad Jusnes


High Temperature Quartz

Quartz is one of the main raw materials for silicon and ferrosilicon production. Together with various carbon sources, quartz is added to a submerged arc furnace where the temperature is above 2000 °C. Through a carbothermic reduction, SiO2 will be reduced to Si. As the quartz is heated, its properties and appearance will change and this can affect the furnace operations. By knowing how each quartz type will behave at high temperatures, this information can be used to select the raw material or the furnace parameters such that the furnace operations are optimized. This will increase the yield for the process, and hence save time, energy, money and interventions in nature. There are large variation in furnace performance for different quartz type, so it is important to select the one most suited.

The aim of my work is to measure fundamental properties like disintegration as a result of shock heating, phase transformations and the enthalpy change associated with them and crack distribution, and also link these properties to chemical analysis for the different quartz types.

Resource Group: Merete Tangstad (NTNU), Eli Ringdalen (SINTEF), Aasgeir Valderhaug (Elkem), Harald Vegge (Elkem)

Contact: karin.jusnes@ntnu.no 


Students at Metal Production

Students at Metal Production


Post Doctorial

Sebastien Letout, RD1
Modelling Metallurgical Production Process
Nov 2015 - Nov 2017

Heiko Gaertner, RD4
PAH Standardization




Pyunghwa Kim, RD2
Reduction Mechanisms in the SiMn Process

Massoud Hassanabadi, RD3
Ceramic Foam Filters Used in Molten Al Filtration

Erlend Lunnan Bjørnstad, RD3
Si Refining


Håkon Olsen, RD4
Dust Formation and Clustering



Associated PhD

Karin Fjeldstad Jusnes

Caoimhe Rooney

Raghed Saadieh

Benedicte Hovd
Charcoal for Manganese Production



Kai Erik Ekstrøm, RD3
Recycling and Refining of Metallurgical
Waste Streams







Sethulaksmy Jayakumari, RD2
SiC Formation in Silicon Processes

Nicholas Smith, RD3
Effect of Minor Elements on Al Oxidation

Daniel Clos, RD4
Scaling in Al off-gas Channels/heat Exchangers

Romain Billy, RD5
Material Flow Analysis of Al



Hamideh Kaffash


Mads Fromreide

Fabian Imanasa Azof
Alumina Production