DALMIA CEMENT (BHARAT) LTD.

Synthesis of synthetic slag as a replacement for industrial GGBS – a boon for the cement industry

This study focuses on the effects of synthetic slag as an alternative to the existing, commercially available, GGBS slag in terms of the compressive strength of slag blended cement (SBC) pastes. Typically, these synthetic slags are prepared on a laboratory scale from limestone, pond ash, red mud and fly ash. Three types of slag were prepared from different raw mixes and the best slag was found with a maximum amorphous content at high temperature. This was examined further for the compressive strength of the slag blended cement. Quantitative X-ray diffraction analysis confirmed the percentage of amorphous content in each of the slags prepared. The results obtained indicate that synthetic slag can be considered as an alternative option to slag obtained from slag plants. This paper presents the results and conclusions of the laboratory trials with respect to the implementation of synthetic slag in SBC.

1 Introduction

Steel slag is produced [1] during the conversion of hot metal to crude steel during the melting of scrap in an electric arc furnace (EAF) or a basic oxygen furnace (BOF). Slag is basically used as a replacement for clinker in the cement industry because of its cementitious property [2].

In the steelmaking process slag is generated at a rate of approximately 100-200 kg/t of product in integrated plants using basic oxygen furnaces and 50 kg/t in electric arc furnace plants (mini-mills). Slag consists mainly of burnt lime and calcium silicates so it is possible that, with some...

Related articles:

Issue 2015-5 WO 2015/037593 A1

Hydraulic composition

(22) 03.09.2014 (43) 19.03.2015 (57) The present invention provides a hydraulic composition including 95?%-75?% by mass Portland cement clinker and 5?%-25?% by mass manganese slag (with the total...

more
Issue 2010-03

Supporting slag applications

The 6. European Slag Conference of EUROSLAG – The ­European Slag Association, will be held from 20.–22.10.2010, in Madrid/Spain, and is to be organised by UNESID ­(Spanish Steel Association). The...

more
Issue 2018-7-8 WO 2018/077590 A1

Method for preparing and activating steelwork slags

(22) 06.10.2017 (43) 03.05.2018 (57) The invention relates to a method for preparing and activating steelwork slags, preferably a LD slag, as a hydraulic composite material for the cement industry. In...

more
Issue 2016-10 NCB/DELHI TECHNOLOGICAL UNIVERSITY

Investigations on composite cement ­containing Indian fly ash and granulated blast furnace slag

The world today faces the gravest challenge in terms of the ever increasing level of greenhouse gas emissions and their impact on global warming coupled with fast depleting natural resources. The use...

more
Issue 2017-7-8 11.10.–13.10.2017, METZ/FRANCE

9th European Slag Conference: Circular economy in the slag industry

The 9th European Slag Conference will take place in Metz/France, at the prestigious Arsenal, from 11.10.-13.10.2017, organized by Euroslag with the local support of Afoco, the French Industrial...

more