Issue |
Metall. Res. Technol.
Volume 112, Number 5, 2015
|
|
---|---|---|
Article Number | 502 | |
Number of page(s) | 9 | |
DOI | https://doi.org/10.1051/metal/2015030 | |
Published online | 18 September 2015 |
Characterisation of LD slag fines by X-ray Diffraction
1 R&D Department,
Tata Steel Limited, Burma mines
post, Jamshedpur, 831
007
Jharkhand,
India
e-mail: shrenivas@tatasteel.com
2 Fuel and Mineral Engineering
Department, ISM
Dhanbad, 826
004
Jharkhand,
India
3 Applied Chemistry Department, Indian
School of Mines, Dhanbad, 826
004
Jharkhand,
India
Received:
30
January
2015
Accepted:
7
August
2015
The reject of waste recycling plant (WRP) i.e. LD slag fines (0–6 mm) after metal recovery does not contain much of metallic iron, but this contains substantial quantity of calcium bearing mineral phases like mono, di and tri calcium silicates along with free lime content varying in the range of 11–15%. The WRP waste of − 6 mm is further subjected to sieving mainly in to three different size fractions viz. +10 mesh (− 6.0 mm +2.0 mm), +60 mesh (− 2.0 mm +0.25 mm), − 60 mesh (− 0.25 mm). These three size fractions of WRP waste shows the free lime content varying from 3.4% for +10 mesh and 9.7% for − 60 mesh. The X-ray diffraction analysis shows portlandite, merwinite, dicalcium silicate – alpha, calcium silicate – beta, and brownmillerite and di calcium diferrate as the major phases in the above said size fractions. The X-ray diffraction analysis was carried out in this paper to get the deeper insight in the mineralogical constitution and behaviour of such waste which represents a valuable raw material for many infrastructure industries including the road construction industry.
Key words: WRP fines / XRD / portlandite / calcium silicate / free lime
© EDP Sciences 2015
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