Influence of the granulation conditions and performance potential of granulated blast-furnace slag – Part 1: Granulation conditions

Laboratory granulation is highly suitable as a means of demonstrating both the influence of different chemical compositions of granulated blastfurnace slags on their reactivity and the influence of different granulation conditions on the physical properties of granulated blastfurnace slag. The first part of this article deals with the granulation conditions.

1 Introduction

As a rule the liquid blastfurnace slag, which is usually at temperatures of 1440–1540 °C, is cooled rapidly in a steel works by quenching with a large excess of water (about 10:1). This breaks down the stream of slag into particles < 5 mm that very largely solidify in vitreous form. The wet granulated blastfurnace slag is dewatered in silos or in open-air stores but because of its granulometry and its more or less porous structure it still contains water when it is made available for cement production. Not only must this moisture be transported but it also has to be almost...

Related articles:

Issue 03/2013

Influence of the granulation conditions and ­performance potential of granulated blastfurnace slag – Part 2: Chemistry and physical properties

3.2 Physical properties and reactivity It is theoretically possible that changed grain morphology could be associated with a changed glass structure, and therefore also with changed reactivity of the...

more
Issue 03/2010

Current developments in the manufacturing and utilization of granulated blast furnace slag

1 Introduction Because of its latent-hydraulic properties, granulated blast furnace slag (GBFS) has been employed as a cement component and as a concrete additive for more than 100 years. Formed from...

more
Issue 4/2020 FEHS – BUILDING MATERIALS INSTITUTE | INSTITUTE OF NON-METALLIC MATERIALS

The thermal history of granulated blast furnace slag and its impact on reactivity

About 400 million t of blast furnace slag are produced annualy world-wide, together with about 1247 million t of hot metal (2018). About 300 million t are quenched forming the glassy granulated blast...

more
Issue 02/2010

Modern grinding aids and their influence on the hydraulic properties of GBFS

1 Introduction The use of granulated blastfurnace slag (GBFS) as a major component of cement has become established in cement making in the last decades and has proved a success as an effective method...

more
Issue 6/2023 FEHS BUILDING MATERIALS INSTITUTE

The steel production transformation process in Europe: New slag types will substitute granulated blast furnace slag

1 Background The “Green deal” strategy of the European Commission from 2019 aims to reduce the net CO2 emissions to zero by 2050. In order to reach this task breakthrough technologies have to be...

more