Characterization of diatomitefrom Sig region (West Algeria)for industrial application

Auteurs :  Hazem MERADI, L'Hadi Atoui, Lynda BAHLOUL, kotbia LABIOD, Fadhel Ismail
Année : 2016
Domaine : Métallurgie
Type : Article de journal
Revue : Management of Environmental Quality: An International Journal
Résumé en PDF :  (résumé en pdf)
Fulltext en PDF :  (.pdf)
Mots clés : diatomite, fluorine, lubrication, Mould fluxes, thermal insulation

Résumé : 

Diatomite also known Kieselguhr, is a non-metallic mineral composed of the skeletalremains of microscopic single-celled aquatic algae called diatoms. The purpose of this paper is to testand to evaluate the diatomite of Sig region (West Algeria) to substitute the main mould powder used incontinuous casting of steel for thermal insulation and lubrication.Design/methodology/approach – To assess the behavior of diatomite at different temperatures,a combination of simultaneous scanning calorimetric and thermogravimetric testing was used and toevaluate the structure of diatomite, the scanning microscopy method was applied.Findings – The results showed different endothermic and exothermic peaks, mainly at 84.7°C and783.5°C for endothermic peaks and 894.9°C for exothermic peak. The scanning microscopy methodwas used and a large porosity was observed. The trial industrial in continuous casting of steel showeda weak loss temperature of steel.Originality/value – This product may be used for thermal insulation in continuous casting of steel.Also the characterization showed the hot behavior of this product with the various transformationsand could give the possibility to other use