2014-Sustainable Industrial Processing Summit
SIPS 2014 Volume 4: Recycling & Secondary Battery
| Editors: | Kongoli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2014 |
| Pages: | 498 pages |
| ISBN: | 978-1-987820-06-5 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
CD shopping page
THE USE OF MARBLE CUTTING RESIDUES AS A SUBSTITUTE FLUXING AGENT FOR IRON ORE PELLET PRODUCTION
Joao B. Conti de Souza1; Nathane P. Scardine2; Ivan Galdino da Silva2; Jose Roberto Oliveura2;1FEDERAL INSTITUTE OF EDUCATION, SCIENCES, TECHNOLOGY OF THE ESPIRITO SANTOS STATE, BRAZIL ( IFES ), Serra, Brazil; 2FEDERAL INSTITUTE OF EDUCATION, SCIENCES, TECHNOLOGY OF THE ESPIRITO SANTOS STATE, BRAZIL ( IFES ), Vitoria, Brazil;
Type of Paper: Regular
Id Paper: 277
Topic: 5
Abstract:
The State of Espirito Santo has one of the largest reserves of marble in Brazil and an industrial park with about 1,000 companies, wish have more than half of looms installed in the country. The biggest problem faced by these manufacturing industries is the generation of waste rock, in the form of abrasive slurry from the cutting and polishing of marble. These wastes produced during the step of cutting the marble are dumped in open tanks causing environmental pollution. A quantity of 35000 tons of solid waste with a grain size of less than 150 mm is generated per month. Such residues have high contents of limestone flux, and have potential for use as input in the production of iron ore pellets which are used as a ferrous cargo in the ironmaking and steelmaking processes. For the conventional production of iron ores pellets, limestone flux, whose composition is of CaCO3 and MgCO3 is used as an important source of MgO and CaO for the primary industrial ferrous plants.
In these study pellets containing marble residue were produced in a pilot plant. The samples were analysed in industrial materials laboratories and subsequently subjected to tests of physical properties producing data of the chemical, physical and metallurgical properties according to the Norm ISO (International Organization for Standardization). At the end of this work, it was found that the residue is suitable for the pelletizing process. We conclude that the crude/green and the fired pellets made from marble waste have characteristics very similar to those of the commercial pellets.