The thermal transformation of Man Made Vitreous Fibers (MMVF) and safe recycling as secondary raw materials (SRM)

Gualtieri, Alessandro F.; Foresti, Elisabetta; Lesci, Isidoro Giorgio; Roveri, Norberto; Gualtieri, Magdalena Lassinantti; Dondi, Michele; Zapparoli, Mauro

doi:10.1016/j.jhazmat.2008.06.066

Cited by 24 publications

(15 citation statements)

References 28 publications

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“…Gualtieri et al investigated several mineral wools and concluded that rock wool can be melted with a maximum firing temperature of 1100 °C. 28 Produced materials in this work presented melting temperatures in the range of 1150-1220 °C, complying with the standard established for rock wools. Therefore, the above discussed thermal behavior of produced materials qualifies them as appropriate for use as fire inhibitors.…”

Section: Differential Thermal Analysis (Dta)supporting

confidence: 65%

Recovery of Steelmaking Slag and Granite Waste in the Production of Rock Wool

Alves¹,

Espinosa

Tenório

2015

Mat. Res.

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Steelmaking slag and residues from granite cuttings are industrial wastes with considerable production, however limited applications. This work studied an inertization and recovery process of such wastes as raw materials into production of rock wool (i.e. a thermo-acoustic insulator with growing market). Several batches were produced aiming the chemical proprieties of a currently marketed rock wool. Mixtures were casted at temperatures of 1400-1500 °C, then quenched in water and also poured into a Herty Viscosimeter. Produced materials with thickness smaller than 500µm were characterized by chemical analyses, XRD, SEM, EDS and DTA. ThermoCalc software was used to simulate the cooling curves of rock wools. Results showed that incorporation of wastes does not affect the main qualities of rock wool, the thermal insulation and prevention of fire spread. Raw material batches of rock wools may assimilate up to 66% of granite waste, or 53% steelmaking slag, or 70% combining both materials.

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Section: Differential Thermal Analysis (Dta)supporting

confidence: 65%

Recovery of Steelmaking Slag and Granite Waste in the Production of Rock Wool

Alves¹,

Espinosa

Tenório

2015

Mat. Res.

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“…Chrysotile accounts for approximately 95% of all asbestos manufactured and used in a wide variety of industrial applications, due to its peculiarity to be easily woven, melded and added to other inorganic and polymeric compounds to form composite materials [2,3].…”

Section: Introductionmentioning

confidence: 99%

Asbestos health hazard: A spectroscopic study of synthetic geoinspired Fe-doped chrysotile

Foresti

Fornero

Lesci

et al. 2009

Journal of Hazardous Materials

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“…Gualtieri et al (2009) investigated the melting temperature of several mineral wools whose results indicated a maximum firing temperature of 1100°C. Therefore, mineral wools produced in this study presented melting temperatures in the range of 1096-1219°C, which is in compliance with the results of the standard material.…”

Section: Characterization Of Glass and Rock Woolsmentioning

confidence: 99%

Characterization of mineral wools obtained from ornamental rock wastes

et al. 2018

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The study aimed to characterize the mineral wools obtained from wastes of the cutting step of marble and granite, in order to evaluate the possibility of their use on an industrial scale. Mixtures of marble and/or granite wastes were prepared in order to reach the chemical composition of rock and glass wools. The batches were melted in an electric arc furnace in laboratory scale at 1450°C and casted with water, in order to obtain a higher cooling rate. Characterization work was performed in batches that formed vitreous material, and with superior incorporation of the residues: 11.7% and 14.6% of marble waste with glass wool and rock wool, respectively; 78.3% and 91.6% of an association of marble and granite wastes with glass wool and rock wool, respectively. Computational thermodynamics was used in order to obtain the main phases at 800°C and determine the liquid and solid content at 1400, 1450 and 1500°C. In addition, the materials obtained were characterized via chemical analysis using X-ray fluorescence, DTA, X-ray diffraction and SEM. The results indicate that the marble and granite waste are composed mainly of CaO (34.7 wt.%) and SiO 2 (66.3 wt.%), respectively. An amorphous crystalline structure was obtained in all tests, indicating that this material can be used as an insulation material. The crystallization temperatures were determined around 800°C.

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The thermal transformation of Man Made Vitreous Fibers (MMVF) and safe recycling as secondary raw materials (SRM)

Cited by 24 publications

References 28 publications

Recovery of Steelmaking Slag and Granite Waste in the Production of Rock Wool

Recovery of Steelmaking Slag and Granite Waste in the Production of Rock Wool

Asbestos health hazard: A spectroscopic study of synthetic geoinspired Fe-doped chrysotile

Characterization of mineral wools obtained from ornamental rock wastes

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