Production of the Aluminosilicate Ceramic Materials Using Fly Ash from Thermal Power Plants (TPP)
- PDF / 322,803 Bytes
- 4 Pages / 594 x 792 pts Page_size
- 48 Downloads / 178 Views
Vol. 61, No. 3, September, 2020
PRODUCTION OF THE ALUMINOSILICATE CERAMIC MATERIALS USING FLY ASH FROM THERMAL POWER PLANTS (TPP) M. Kh. Rumi,1,2 Sh. K. Irmatova,1 Sh. A. Fayziev,1 E. M. Urazaeva,1 E. P. Mansurova,1 and M. A. Zufarov1 Translated from Novye Ogneupory, No. 5, pp. 37 – 40, May 2020.
Original article submitted March 30, 2020. Research has been conducted on the use of fly ash from TPP in masses based on a fireclay filler and a clay binder for the production of ceramic aluminosilicate materials for various purposes. It was found that the properties of ceramic materials depend on the clay binder:ash ratio. The regions with higher concentrations of ash in the charge and the firing temperature of samples that establish the properties of the final product are determined, which makes it possible to obtain materials with an apparent density of 1.06 – 1.47 g/cm3 and a compressive strength of 4 – 23 MPa. Keywords: aluminosilicate materials, ash, fly ash from thermal power plants (TPP), chamotte, density, strength.
GOST 5402–91), and the chemical composition – using standard methods of analytical chemistry. The fractional composition of the ash and slag waste is shown in Fig. 1. Fly ash (hereinafter ash) is the main component (~85 wt.%) and, in terms of chemical composition, refers to acidic ashes. The chemical composition of ash is as follows, wt. %: SiO2 51.25, Al2O3 25.34, Fe2O3 total 3.28, CaO 3.08, MgO 1.21, TiO2 0.19, Na2O 4.04, K2O 3.01, P2O5 0.12, MnO 0.05, SO3 total 3.09, H2O 1.16, CO2 .0; (mign 8.40. It is known that an important characteristic of ash is the aluminosilicate modulus SiO2/Al2O3, which is a geochemical feature
INTRODUCTION The use of industrial waste is becoming more and more important every year. Waste from combustion of coal at TPPs is one of the most in demand and is widely used to obtain concrete due to its binding properties [1, 2] and masses for producing clay-based materials [3 – 5]. It is known that the chemical and mineral composition of ash can vary greatly depending on the type and composition of the non-combustible mineral part of coal and the conditions of its combustion [6]. The purpose of this study is to expand the range of applications of fly ash from the Novoangrenskaya TPP, in particular, for the production of ceramic aluminosilicate materials. EXPERIMENTAL METHODS The phase composition of the ash and slag waste was determined on a DRON-UM-1 diffractometer (Cu Ka-radiation), physical and technical characteristics – according to standard procedures in accordance with the requirements of regulatory and technical documents (GOST 2409–2014 and 1 2
Institute of Material Sciences SPA “Physics – Sun”, Academy of Sciences of the Republic of Uzbekistan (Uzbekistan). [email protected]
Fig. 1. Ash composition of slag waste.
281 1083-4877/20/06103-0281 © 2020 Springer Science+Business Media, LLC
282
M. Kh. Rumi, Sh. K. Irmatova, Sh. A. Fayziev, et al.
Fig. 2. Diffraction patterns of ash: initial ash (1) and after firing at 1280 (2) and 1330°C (3); M — mullite, C — calc
Data Loading...
