Abstract
At present, in Europe, 18 million tonnes of MSWI Bottom Ash (BA) is annually stockpiled or used in low-grade applications (e.g. in road bases). Therefore, alternative applications, such as aggregate or as a cement component in concrete, are stimulated. Physical and chemical characteristics remaining after treatment, however, prevent its extensive application in building materials. Hence, knowledge is needed on the distinct properties of the material classes making up a heterogeneous BA, enabling the assessment of its characteristics and the resulting applicability. Furthermore, a user-friendly composition assessment procedure is necessary to evaluate the output of physical treatment processes. Crushing is a commonly applied treatment and its effect on the material classes comprising BA is still unknown. In this paper, the latter are identified and classified into slag, magnetic slag, glass, refractory, metals, and unburned material classes. The individual characteristics of each material class are identified and a suitable tracer for tracking these classes in heterogeneous samples is defined. Furthermore, a fast method to quantify the distribution of material classes based just on the oxide composition is developed and applied to approximate the changes in the configuration of BA through crushing. It is concluded that, although the jaw crushing of BA results in a more homogeneous distribution, beneficiation of material classes occurs and selective crushing is possible in order to improve the quality of the BA and therefore its subsequent application.
| Original language | English |
|---|---|
| Pages (from-to) | 268-282 |
| Number of pages | 15 |
| Journal | Waste Management |
| Volume | 101 |
| DOIs | |
| Publication status | Published - 1 Jan 2020 |
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Keywords
- Coarse MSWI bottom ash
- Composition
- Crushing
- Material classes
- Model
- Construction Materials
- Coal Ash
- Incineration
- Europe
- Refuse Disposal
- Solid Waste
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Compositional modelling and crushing behaviour of MSWI bottom ash material classes. / van de Wouw, P.M.F. (Corresponding author); Loginova, E.; Florea, M.V.A.; Brouwers, H.J.H.
In: Waste Management, Vol. 101, 01.01.2020, p. 268-282.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Compositional modelling and crushing behaviour of MSWI bottom ash material classes
AU - van de Wouw, P.M.F.
AU - Loginova, E.
AU - Florea, M.V.A.
AU - Brouwers, H.J.H.
PY - 2020/1/1
Y1 - 2020/1/1
N2 - At present, in Europe, 18 million tonnes of MSWI Bottom Ash (BA) is annually stockpiled or used in low-grade applications (e.g. in road bases). Therefore, alternative applications, such as aggregate or as a cement component in concrete, are stimulated. Physical and chemical characteristics remaining after treatment, however, prevent its extensive application in building materials. Hence, knowledge is needed on the distinct properties of the material classes making up a heterogeneous BA, enabling the assessment of its characteristics and the resulting applicability. Furthermore, a user-friendly composition assessment procedure is necessary to evaluate the output of physical treatment processes. Crushing is a commonly applied treatment and its effect on the material classes comprising BA is still unknown. In this paper, the latter are identified and classified into slag, magnetic slag, glass, refractory, metals, and unburned material classes. The individual characteristics of each material class are identified and a suitable tracer for tracking these classes in heterogeneous samples is defined. Furthermore, a fast method to quantify the distribution of material classes based just on the oxide composition is developed and applied to approximate the changes in the configuration of BA through crushing. It is concluded that, although the jaw crushing of BA results in a more homogeneous distribution, beneficiation of material classes occurs and selective crushing is possible in order to improve the quality of the BA and therefore its subsequent application.
AB - At present, in Europe, 18 million tonnes of MSWI Bottom Ash (BA) is annually stockpiled or used in low-grade applications (e.g. in road bases). Therefore, alternative applications, such as aggregate or as a cement component in concrete, are stimulated. Physical and chemical characteristics remaining after treatment, however, prevent its extensive application in building materials. Hence, knowledge is needed on the distinct properties of the material classes making up a heterogeneous BA, enabling the assessment of its characteristics and the resulting applicability. Furthermore, a user-friendly composition assessment procedure is necessary to evaluate the output of physical treatment processes. Crushing is a commonly applied treatment and its effect on the material classes comprising BA is still unknown. In this paper, the latter are identified and classified into slag, magnetic slag, glass, refractory, metals, and unburned material classes. The individual characteristics of each material class are identified and a suitable tracer for tracking these classes in heterogeneous samples is defined. Furthermore, a fast method to quantify the distribution of material classes based just on the oxide composition is developed and applied to approximate the changes in the configuration of BA through crushing. It is concluded that, although the jaw crushing of BA results in a more homogeneous distribution, beneficiation of material classes occurs and selective crushing is possible in order to improve the quality of the BA and therefore its subsequent application.
KW - Coarse MSWI bottom ash
KW - Composition
KW - Crushing
KW - Material classes
KW - Model
KW - Construction Materials
KW - Coal Ash
KW - Incineration
KW - Europe
KW - Refuse Disposal
KW - Solid Waste
UR - http://www.scopus.com/inward/record.url?scp=85073511213&partnerID=8YFLogxK
U2 - 10.1016/j.wasman.2019.10.013
DO - 10.1016/j.wasman.2019.10.013
M3 - Article
C2 - 31634813
AN - SCOPUS:85073511213
VL - 101
SP - 268
EP - 282
JO - Waste Management
JF - Waste Management
SN - 0956-053X
ER -