Valorization of the steel industry slag and by-products as raw material asset for innovative refractories

Marjaana Karhu, Patrycja Piotrowska, Bob Talling, Jasmin Hum, Aldo R. Boccaccini, Pertti Lintunen

Research output: Contribution to conferenceConference AbstractScientific

Abstract

The European steel industry generated in 2012 about 21.4 million tons of slag of which about 24% was landfilled. Landfilling of the huge amount of materials poses a severe environmental problem in Europe. Utilization of currently landfilled waste is a target of growing interest towards circular economy and closing the loop. Insulating refractory materials are needed in all thermal energy intensive industries for example in the construction of the furnaces, kilns, incinerators, or reactors. The relevant properties of certain slags and industrial by-products to withstand high temperatures make them possible raw material candidates when manufacturing novel refractory materials. In the presented study, exploitation potentiality of ferrochrome slag and other by-product as raw material asset for refractory materials has been studied. The goal was to maximize the use of secondary raw materials in refractory materials with mechanical and chemical resistance up to 1200°C in gaseous atmosphere. Recipes were formulated based on raw material characterization results and theoretical calculations including optimal particle packing calculations. Mortar pieces were prepared according to standard EN 196-1. Mechanical properties of the refractory specimens were evaluated based on their cold crushing strength. In addition, specimens were characterized in terms of physical and thermo-physical properties: density, porosity, thermal conductivity, thermal diffusivity and heat capacity and compared to commercially available refractory material. The cold compressive strengths reaching the values of 70-90 MPa were observed for the mortars heat-treated at 1200°C being comparable level to commercial reference. Thermal conductivity values of the mortars were at the level of 1.8-2.2 W/K m, which indicates good heat insulating capability showing values
even below that of reference material.
Original languageEnglish
Publication statusPublished - 2018
MoE publication typeNot Eligible
Event10th International Conference on the Environmental and Technical Implications of Construction with Alternative Materials
WASCON 2018
- Tampere Hall, Tampere, Finland
Duration: 6 Jun 20178 Jun 2017
Conference number: 10
https://www.ril.fi/en/events/wascon-2018.html

Conference

Conference10th International Conference on the Environmental and Technical Implications of Construction with Alternative Materials
WASCON 2018
Abbreviated titleWASCON 2018
CountryFinland
CityTampere
Period6/06/178/06/17
Internet address

Fingerprint

Iron and steel industry
Refractory materials
Slags
Byproducts
Raw materials
Mortar
Compressive strength
Thermal conductivity
Chemical resistance
Refuse incinerators
Insulating materials
Thermal diffusivity
Kilns
Thermal energy
Density (specific gravity)
Specific heat
Furnaces
Thermodynamic properties
Porosity
Mechanical properties

Keywords

  • Slag valorization, Refractories, Ferrochrome slag

Cite this

Karhu, M., Piotrowska, P., Talling, B., Hum, J., Boccaccini, A. R., & Lintunen, P. (2018). Valorization of the steel industry slag and by-products as raw material asset for innovative refractories. Abstract from 10th International Conference on the Environmental and Technical Implications of Construction with Alternative Materials
WASCON 2018, Tampere, Finland.
Karhu, Marjaana ; Piotrowska, Patrycja ; Talling, Bob ; Hum, Jasmin ; Boccaccini, Aldo R. ; Lintunen, Pertti. / Valorization of the steel industry slag and by-products as raw material asset for innovative refractories. Abstract from 10th International Conference on the Environmental and Technical Implications of Construction with Alternative Materials
WASCON 2018, Tampere, Finland.
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abstract = "The European steel industry generated in 2012 about 21.4 million tons of slag of which about 24{\%} was landfilled. Landfilling of the huge amount of materials poses a severe environmental problem in Europe. Utilization of currently landfilled waste is a target of growing interest towards circular economy and closing the loop. Insulating refractory materials are needed in all thermal energy intensive industries for example in the construction of the furnaces, kilns, incinerators, or reactors. The relevant properties of certain slags and industrial by-products to withstand high temperatures make them possible raw material candidates when manufacturing novel refractory materials. In the presented study, exploitation potentiality of ferrochrome slag and other by-product as raw material asset for refractory materials has been studied. The goal was to maximize the use of secondary raw materials in refractory materials with mechanical and chemical resistance up to 1200°C in gaseous atmosphere. Recipes were formulated based on raw material characterization results and theoretical calculations including optimal particle packing calculations. Mortar pieces were prepared according to standard EN 196-1. Mechanical properties of the refractory specimens were evaluated based on their cold crushing strength. In addition, specimens were characterized in terms of physical and thermo-physical properties: density, porosity, thermal conductivity, thermal diffusivity and heat capacity and compared to commercially available refractory material. The cold compressive strengths reaching the values of 70-90 MPa were observed for the mortars heat-treated at 1200°C being comparable level to commercial reference. Thermal conductivity values of the mortars were at the level of 1.8-2.2 W/K m, which indicates good heat insulating capability showing valueseven below that of reference material.",
keywords = "Slag valorization, Refractories, Ferrochrome slag",
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Karhu, M, Piotrowska, P, Talling, B, Hum, J, Boccaccini, AR & Lintunen, P 2018, 'Valorization of the steel industry slag and by-products as raw material asset for innovative refractories' 10th International Conference on the Environmental and Technical Implications of Construction with Alternative Materials
WASCON 2018, Tampere, Finland, 6/06/17 - 8/06/17, .

Valorization of the steel industry slag and by-products as raw material asset for innovative refractories. / Karhu, Marjaana; Piotrowska, Patrycja; Talling, Bob; Hum, Jasmin; Boccaccini, Aldo R.; Lintunen, Pertti.

2018. Abstract from 10th International Conference on the Environmental and Technical Implications of Construction with Alternative Materials
WASCON 2018, Tampere, Finland.

Research output: Contribution to conferenceConference AbstractScientific

TY - CONF

T1 - Valorization of the steel industry slag and by-products as raw material asset for innovative refractories

AU - Karhu, Marjaana

AU - Piotrowska, Patrycja

AU - Talling, Bob

AU - Hum, Jasmin

AU - Boccaccini, Aldo R.

AU - Lintunen, Pertti

N1 - "Authors of an accepted abstract have a possibility to submit an extended abstract. Extended abstracts will be published in a digital conference proceedings with an ISBN and ISSN number. Submission of the extended abstract is optional"

PY - 2018

Y1 - 2018

N2 - The European steel industry generated in 2012 about 21.4 million tons of slag of which about 24% was landfilled. Landfilling of the huge amount of materials poses a severe environmental problem in Europe. Utilization of currently landfilled waste is a target of growing interest towards circular economy and closing the loop. Insulating refractory materials are needed in all thermal energy intensive industries for example in the construction of the furnaces, kilns, incinerators, or reactors. The relevant properties of certain slags and industrial by-products to withstand high temperatures make them possible raw material candidates when manufacturing novel refractory materials. In the presented study, exploitation potentiality of ferrochrome slag and other by-product as raw material asset for refractory materials has been studied. The goal was to maximize the use of secondary raw materials in refractory materials with mechanical and chemical resistance up to 1200°C in gaseous atmosphere. Recipes were formulated based on raw material characterization results and theoretical calculations including optimal particle packing calculations. Mortar pieces were prepared according to standard EN 196-1. Mechanical properties of the refractory specimens were evaluated based on their cold crushing strength. In addition, specimens were characterized in terms of physical and thermo-physical properties: density, porosity, thermal conductivity, thermal diffusivity and heat capacity and compared to commercially available refractory material. The cold compressive strengths reaching the values of 70-90 MPa were observed for the mortars heat-treated at 1200°C being comparable level to commercial reference. Thermal conductivity values of the mortars were at the level of 1.8-2.2 W/K m, which indicates good heat insulating capability showing valueseven below that of reference material.

AB - The European steel industry generated in 2012 about 21.4 million tons of slag of which about 24% was landfilled. Landfilling of the huge amount of materials poses a severe environmental problem in Europe. Utilization of currently landfilled waste is a target of growing interest towards circular economy and closing the loop. Insulating refractory materials are needed in all thermal energy intensive industries for example in the construction of the furnaces, kilns, incinerators, or reactors. The relevant properties of certain slags and industrial by-products to withstand high temperatures make them possible raw material candidates when manufacturing novel refractory materials. In the presented study, exploitation potentiality of ferrochrome slag and other by-product as raw material asset for refractory materials has been studied. The goal was to maximize the use of secondary raw materials in refractory materials with mechanical and chemical resistance up to 1200°C in gaseous atmosphere. Recipes were formulated based on raw material characterization results and theoretical calculations including optimal particle packing calculations. Mortar pieces were prepared according to standard EN 196-1. Mechanical properties of the refractory specimens were evaluated based on their cold crushing strength. In addition, specimens were characterized in terms of physical and thermo-physical properties: density, porosity, thermal conductivity, thermal diffusivity and heat capacity and compared to commercially available refractory material. The cold compressive strengths reaching the values of 70-90 MPa were observed for the mortars heat-treated at 1200°C being comparable level to commercial reference. Thermal conductivity values of the mortars were at the level of 1.8-2.2 W/K m, which indicates good heat insulating capability showing valueseven below that of reference material.

KW - Slag valorization, Refractories, Ferrochrome slag

UR - https://wascon2018.exordo.com/files/papers/48/presentation_files/1/Wascon_2018_Karhu_et_al__2_.pdf

M3 - Conference Abstract

ER -

Karhu M, Piotrowska P, Talling B, Hum J, Boccaccini AR, Lintunen P. Valorization of the steel industry slag and by-products as raw material asset for innovative refractories. 2018. Abstract from 10th International Conference on the Environmental and Technical Implications of Construction with Alternative Materials
WASCON 2018, Tampere, Finland.