Mining tailings as raw materials for reaction-sintered aluminosilicate ceramics

Mining tailings as raw materials for reaction-sintered aluminosilicate ceramics: Effect of mineralogical composition on microstructure and properties

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Mining tailings as raw materials for reaction-sintered aluminosilicate ceramics : Effect of mineralogical composition on microstructure and properties. / Karhu, Marjaana; Lagerbom, Juha; Solismaa, Soili; Honkanen, Mari ; Ismailov, Arnold; Räisänen, Marja Liisa; Huttunen-Saarivirta, Elina; Levänen, Erkki; Kivikytö-Reponen, Päivi.

In: Ceramics International, Vol. 45, No. 4, 03.2019, p. 4840-4848.

Research output: Contribution to journal › Article › Scientific › peer-review

Author

Karhu, Marjaana ; Lagerbom, Juha ; Solismaa, Soili ; Honkanen, Mari ; Ismailov, Arnold ; Räisänen, Marja Liisa ; Huttunen-Saarivirta, Elina ; Levänen, Erkki ; Kivikytö-Reponen, Päivi. / Mining tailings as raw materials for reaction-sintered aluminosilicate ceramics : Effect of mineralogical composition on microstructure and properties. In: Ceramics International. 2019 ; Vol. 45, No. 4. pp. 4840-4848.

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@article{2bdfecc3d5ed4ce19b7d41ccfa9cb614,

title = "Mining tailings as raw materials for reaction-sintered aluminosilicate ceramics: Effect of mineralogical composition on microstructure and properties",

abstract = "This paper presents studies on the utilization of aluminosilicate-based mining tailings as raw materials for mullite-based ceramics. Based on the 3:2 stoichiometric composition, mullite was synthesised by reactive sintering with a series of powder mixtures with alumina additions. X-ray diffractometry and scanning electron microscopy analyses revealed that, at the specific mineralogical composition, mullite structure formed surrounded by an amorphous glass phase in reaction-sintered powder mixtures. Results demonstrated that the chemical and mineralogical composition of mining tailings do have an effect on mullite formation possibilities and, only with the particular mineralogical composition, the mullite formation is possible regardless of the correct Al:Si ratio in tailings. Physical and mechanical properties of the formed ceramics were defined, showing comparable values to 3:2 mullite reference. Mullite structure formation enables a better thermal resistance up to above 1450 °C of the formed tailings-based ceramics compared to other aluminosilicates, reflecting their utilization potential for refractory ceramic applications.",

keywords = "Mining tailings, Mullite, Reaction sintering, Refractory ceramics, Utilization",

author = "Marjaana Karhu and Juha Lagerbom and Soili Solismaa and Mari Honkanen and Arnold Ismailov and R{\"a}is{\"a}nen, {Marja Liisa} and Elina Huttunen-Saarivirta and Erkki Lev{\"a}nen and P{\"a}ivi Kivikyt{\"o}-Reponen",

note = "EXT={"}Lagerbom, Juha{"}",

year = "2019",

month = "3",

doi = "10.1016/j.ceramint.2018.11.180",

language = "English",

volume = "45",

pages = "4840--4848",

journal = "Ceramics International",

issn = "0272-8842",

publisher = "Elsevier",

number = "4",

}

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TY - JOUR

T1 - Mining tailings as raw materials for reaction-sintered aluminosilicate ceramics

T2 - Effect of mineralogical composition on microstructure and properties

AU - Karhu, Marjaana

AU - Lagerbom, Juha

AU - Solismaa, Soili

AU - Honkanen, Mari

AU - Ismailov, Arnold

AU - Räisänen, Marja Liisa

AU - Huttunen-Saarivirta, Elina

AU - Levänen, Erkki

AU - Kivikytö-Reponen, Päivi

N1 - EXT="Lagerbom, Juha"

PY - 2019/3

Y1 - 2019/3

N2 - This paper presents studies on the utilization of aluminosilicate-based mining tailings as raw materials for mullite-based ceramics. Based on the 3:2 stoichiometric composition, mullite was synthesised by reactive sintering with a series of powder mixtures with alumina additions. X-ray diffractometry and scanning electron microscopy analyses revealed that, at the specific mineralogical composition, mullite structure formed surrounded by an amorphous glass phase in reaction-sintered powder mixtures. Results demonstrated that the chemical and mineralogical composition of mining tailings do have an effect on mullite formation possibilities and, only with the particular mineralogical composition, the mullite formation is possible regardless of the correct Al:Si ratio in tailings. Physical and mechanical properties of the formed ceramics were defined, showing comparable values to 3:2 mullite reference. Mullite structure formation enables a better thermal resistance up to above 1450 °C of the formed tailings-based ceramics compared to other aluminosilicates, reflecting their utilization potential for refractory ceramic applications.

AB - This paper presents studies on the utilization of aluminosilicate-based mining tailings as raw materials for mullite-based ceramics. Based on the 3:2 stoichiometric composition, mullite was synthesised by reactive sintering with a series of powder mixtures with alumina additions. X-ray diffractometry and scanning electron microscopy analyses revealed that, at the specific mineralogical composition, mullite structure formed surrounded by an amorphous glass phase in reaction-sintered powder mixtures. Results demonstrated that the chemical and mineralogical composition of mining tailings do have an effect on mullite formation possibilities and, only with the particular mineralogical composition, the mullite formation is possible regardless of the correct Al:Si ratio in tailings. Physical and mechanical properties of the formed ceramics were defined, showing comparable values to 3:2 mullite reference. Mullite structure formation enables a better thermal resistance up to above 1450 °C of the formed tailings-based ceramics compared to other aluminosilicates, reflecting their utilization potential for refractory ceramic applications.

KW - Mining tailings

KW - Mullite

KW - Reaction sintering

KW - Refractory ceramics

KW - Utilization

U2 - 10.1016/j.ceramint.2018.11.180

DO - 10.1016/j.ceramint.2018.11.180

M3 - Article

VL - 45

SP - 4840

EP - 4848

JO - Ceramics International

JF - Ceramics International

SN - 0272-8842

IS - 4

ER -

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