LKAB’s Straight Grate Process - Examining new Process Concepts
LKAB is one of Sweden’s larger industrial companies and is, on the seaborne import market, the second largest supplier of iron ore pellets in the world. Mining and processing iron ore are energy intensive processes with considerable energy related emissions. The final heat treatment of the iron ore...
Main Author: | |
---|---|
Other Authors: | , |
Format: | Other/Unknown Material |
Language: | English |
Published: |
2019
|
Subjects: | |
Online Access: | https://hdl.handle.net/20.500.12380/254879 |
id |
ftchalmersuniojs:oai:odr.chalmers.se:20.500.12380/254879 |
---|---|
record_format |
openpolar |
spelling |
ftchalmersuniojs:oai:odr.chalmers.se:20.500.12380/254879 2023-07-30T04:04:48+02:00 LKAB’s Straight Grate Process - Examining new Process Concepts Nilsson, Johan Chalmers tekniska högskola / Institutionen för rymd-, geo- och miljövetenskap Chalmers University of Technology / Department of Space, Earth and Environment 2019-07-03T14:42:00Z https://hdl.handle.net/20.500.12380/254879 eng eng https://hdl.handle.net/20.500.12380/254879 Energiteknik Hållbar utveckling Energi Energy Engineering Sustainable Development Energy H 2019 ftchalmersuniojs https://doi.org/20.500.12380/254879 2023-07-08T19:57:35Z LKAB is one of Sweden’s larger industrial companies and is, on the seaborne import market, the second largest supplier of iron ore pellets in the world. Mining and processing iron ore are energy intensive processes with considerable energy related emissions. The final heat treatment of the iron ore pellets, done in a straight-grate or grate-kiln furnace, is the most energy intensive part of the process. A collaboration between LKAB and the Division of Energy Technology at Chalmers aims to improve the energy efficiency of the heat treatment in the pelletizing plants. This thesis, as a part of that initiative, investigates the possibility to improve the energy efficiency of the straight-grate process. By modifications to a previously developed model for simulating the heat treatment in the straight-grate process, several design concepts are investigated in this work. The evaluation is based on performance indicators and process constraints with input data from the MK3 unit in Malmberget. The most interesting concepts identified are optimized towards either production rate or fuel consumption, with a sustained product quality. The results indicates that a prolonged drying section is the most promising concept. An increase in production rate of 6 % is achieved with a reduced fuel consumption by 32 %. If the process is optimized solely for fuel economy a reduction of 50 % may be achieved. Furthermore, this work shows that development of the simulation model is required to properly be able to simulate the straight-grate process, where implementation of leakage flows between process zones and a wider range of quality parameters are the most important areas. Other/Unknown Material Malmberget Chalmers University of Technology: Chalmers Open Digital Repository (ODR) Chalmers ENVELOPE(159.483,159.483,-79.333,-79.333) |
institution |
Open Polar |
collection |
Chalmers University of Technology: Chalmers Open Digital Repository (ODR) |
op_collection_id |
ftchalmersuniojs |
language |
English |
topic |
Energiteknik Hållbar utveckling Energi Energy Engineering Sustainable Development Energy |
spellingShingle |
Energiteknik Hållbar utveckling Energi Energy Engineering Sustainable Development Energy Nilsson, Johan LKAB’s Straight Grate Process - Examining new Process Concepts |
topic_facet |
Energiteknik Hållbar utveckling Energi Energy Engineering Sustainable Development Energy |
description |
LKAB is one of Sweden’s larger industrial companies and is, on the seaborne import market, the second largest supplier of iron ore pellets in the world. Mining and processing iron ore are energy intensive processes with considerable energy related emissions. The final heat treatment of the iron ore pellets, done in a straight-grate or grate-kiln furnace, is the most energy intensive part of the process. A collaboration between LKAB and the Division of Energy Technology at Chalmers aims to improve the energy efficiency of the heat treatment in the pelletizing plants. This thesis, as a part of that initiative, investigates the possibility to improve the energy efficiency of the straight-grate process. By modifications to a previously developed model for simulating the heat treatment in the straight-grate process, several design concepts are investigated in this work. The evaluation is based on performance indicators and process constraints with input data from the MK3 unit in Malmberget. The most interesting concepts identified are optimized towards either production rate or fuel consumption, with a sustained product quality. The results indicates that a prolonged drying section is the most promising concept. An increase in production rate of 6 % is achieved with a reduced fuel consumption by 32 %. If the process is optimized solely for fuel economy a reduction of 50 % may be achieved. Furthermore, this work shows that development of the simulation model is required to properly be able to simulate the straight-grate process, where implementation of leakage flows between process zones and a wider range of quality parameters are the most important areas. |
author2 |
Chalmers tekniska högskola / Institutionen för rymd-, geo- och miljövetenskap Chalmers University of Technology / Department of Space, Earth and Environment |
format |
Other/Unknown Material |
author |
Nilsson, Johan |
author_facet |
Nilsson, Johan |
author_sort |
Nilsson, Johan |
title |
LKAB’s Straight Grate Process - Examining new Process Concepts |
title_short |
LKAB’s Straight Grate Process - Examining new Process Concepts |
title_full |
LKAB’s Straight Grate Process - Examining new Process Concepts |
title_fullStr |
LKAB’s Straight Grate Process - Examining new Process Concepts |
title_full_unstemmed |
LKAB’s Straight Grate Process - Examining new Process Concepts |
title_sort |
lkab’s straight grate process - examining new process concepts |
publishDate |
2019 |
url |
https://hdl.handle.net/20.500.12380/254879 |
long_lat |
ENVELOPE(159.483,159.483,-79.333,-79.333) |
geographic |
Chalmers |
geographic_facet |
Chalmers |
genre |
Malmberget |
genre_facet |
Malmberget |
op_relation |
https://hdl.handle.net/20.500.12380/254879 |
op_doi |
https://doi.org/20.500.12380/254879 |
_version_ |
1772816406493003776 |