Romain Billy


Romain Billy


Material Flow Analysis of the global Aluminium cycle - Development of scenarios for future demand in technologies

The overall objective of this project is to improve the understanding of the relationships between metal cycles and the society.

Aluminium is a metal of choice for this study: after steel, this is the second most used metal worldwide, and its production is highly energy intensive. Recycling of post-consumer scrap enables substantial energy savings, but it requires a better understanding of the stocks and flows of aluminium in our society.

In this regard, a global model of aluminium flows has already been developed by NTNU. It has become a reference used by the International Aluminium Institute to build visualizations on the historic distribution of global mass flows. This project aims to improve the forecasting capabilities of this model, following these steps:

  1. Refine the existing model and implement forecasting tools based on stock dynamics to study future scenarios.
  2. Expand the scope to include indirect components of the metal cycles, such as technology, capital and labour stocks.
  3. Communicate the results: in addition to publishing in scientific journals, design innovative visualizations and simple forecasting tools to foster the dissemination of this research.

The developed knowledge will generate insights for strategy planning in industry and public institutions, by (1) forecasting how the current stock patterns will drive the future investments in technologies and (2) improving the understanding of the impacts on society, in areas such as land or energy use or changes in the structure of the workforce.

Resource Group: Professor Leiv Kolbeinsen (NTNU), Professor Daniel Mueller (NTNU)



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