Stabilisation and solidification of steel industry sludge

Conference proceedings article

Authors / Editors

Ntuli, Freeman

Research Areas

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Publication Details

Author list: Falayi T, Ntuli F

Place: NEW YORK

Publication year: 2017

Journal: 2017 IEEE 9TH INTERNATIONAL CONFERENCE ON HUMANOID, NANOTECHNOLOGY, INFORMATION TECHNOLOGY, COMMUNICATION AND CONTROL, ENVIRONMENT AND MANAGEMENT (IEEE HNICEM) (2475-7152)

Journal acronym: I C HUMANOID NANOTEC

Number of pages: 4

eISBN: 978-1-5386-0912-5

ISSN: 2475-7152

Languages: English-Great Britain (EN-GB)

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Abstract

This report presents the research done on the treatment of steel industry sludge by the solidification / stabilisation (S/S) process using desilicated fly ash (DFA) and lime as the binding agents. The sludge was characterized using Xray fluorescence, X-ray diffraction, and geotechnical techniques. The main oxides in the sludge were iron oxide and zinc oxide. Unconfined compressed strength of 0.49 MPa was achieved with 40% DFA: lime (70:30) addition, at pH of 12.88. The leachability of Fe was reduced by 94% and Zn by 98.6%. The rate of lime consumption during stabilisation was best described with 2nd order kinetics plot.

Keywords

desilicated fly ash, sludge, solidification, stabilisation

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