Sethulakshmy Jayakumari


Sethulakshmy Jayakumari

High Temperature Reactions in the Si Process – High Temperature SiC Formation.

In the high silicon production process, black silicon carbide (SiC) crusts have been found. This SiC crust is also known as α-SiC or high temperature SiC. SiC crust has a relatively high electrical conductivity and it is believed that the SiC-crust will contribute to the energy dissipation in the process. There are three main theories on how this SiC crust is formed;

a) Carbon added to the process will be transformed to β-SiC, which again at high temperatures will transform to α-SiC.
b) α-SiC is precipitated from liquid silicon during temperature variations.
c) α-SiC is produced when gaseous SiCx compounds are formed in the high temperature arc, and then condensed at lower temperatures on the crater wall.

My project aims to study various formation methods of α-SiC and investigate the structure of various SiC products, compare them with industrial SiC crusts. Various furnace experiments such as plasma furnace, induction furnace experiments will be performed to evaluate the SiC formation. Different microscopic techniques such as EPMA, SEM, TEM, XRD will be applied to characterize the different phases in various SiC samples. The usage for the industry will be a higher knowledge level of their furnace operation. The innovations that may come from this project is new operation strategies.

Resource Group: Professor Merete Tangstad (NTNU), Edin Myrhaug (Elkem), Ørjan Berntsen (Finnfjord)



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