Process integration / System Analysis


Development of a process integration tool for an iron ore upgrading process system

Process Integration is the common name for a number of different methods to systematically analyze industrial production systems. For example, process integration can be used to optimize the use of raw material or energy consumption, to minimize emissions or optimize the quality of the final product. The advantage by using process integration is that you include the whole industrial production system into your model, by doing that you can avoid the negative effects that sub optimization can result in i.e. optimization of a single process unit does not necessary lead to an improvement of the whole production system.
My project aims to develop a process integration model for LKAB’s production system in Malmberget. Later on we want to use this model to optimize primarily energy consumption and environmental impact.

Financier: Vinnova, KK-stiftelsen, SSF, LKAB, SSAB, Ruukki, LTU

Project Partners: LTU, LKAB, Mefos

Duration: 2006-2009

Contact person at LTU: Samuel Nordgren

LKAB's iron ore upgrading facilities in Kiruna.

Optimization of Energy use at LKAB

The mining industry is one of the energy intensive processing
industries. Every year vast quantities of energy is being used. For
example the mining and iron ore upgrading of LKAB in Kiruna used 882 GWh
electricity, 14.000 m3 oil and 71.000 tonnes of coal.

For many years LKAB has been focusing on energy efficiency in various
projects and forms, but until recently process integration has not been

In this project an optimisation model of LKAB's iron ore upgrading
facilities in Kiruna will be developed. The development will mainly rely
on the methods and techniques known in the field of process integration.
In addition to mathematical programming and modelling in reMind, other
process integration techniques like pinch analysis and exergy analysis
will be utilised.

The objective is to develop a model that, the iron ore upgrading
facilities aside, also models the connections to the surrounding society.

Financiers: LKAB and the Swedish Energy Agency
Partners: LKAB and PRISMA at Mefos
Project time span: 2007-2010
Contact persons at LTU: Johan Sandberg and Jan Dahl