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

Marjaana Karhu (Corresponding Author), Juha Lagerbom, Soili Solismaa, Mari Honkanen, Arnold Ismailov, Marja Liisa Räisänen, Elina Huttunen-Saarivirta, Erkki Levänen, Päivi Kivikytö-Reponen

    Research output: Contribution to journalArticleScientificpeer-review

    2 Citations (Scopus)

    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.

    Original languageEnglish
    Pages (from-to)4840-4848
    Number of pages9
    JournalCeramics International
    Volume45
    Issue number4
    DOIs
    Publication statusPublished - 1 Mar 2019
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Mullite
    Aluminosilicates
    Tailings
    Raw materials
    Microstructure
    Chemical analysis
    Powders
    aluminosilicate
    Heat resistance
    Refractory materials
    X ray diffraction analysis
    Aluminum Oxide
    Alumina
    Sintering
    Physical properties
    Glass
    Mechanical properties
    Scanning electron microscopy

    Keywords

    • Mining tailings
    • Mullite
    • Reaction sintering
    • Refractory ceramics
    • Utilization

    Cite this

    @article{e37e5db8484a421cb76f0905cdfb3cdb,
    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",
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    Mining tailings as raw materials for reaction-sintered aluminosilicate ceramics : Effect of mineralogical composition on microstructure and properties. / Karhu, Marjaana (Corresponding Author); 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, 01.03.2019, p. 4840-4848.

    Research output: Contribution to journalArticleScientificpeer-review

    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

    PY - 2019/3/1

    Y1 - 2019/3/1

    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.

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