2014-Sustainable Industrial Processing Summit
SIPS 2014 Volume 2: Mineral Processing
| Editors: | Kongoli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2014 |
| Pages: | 446 pages |
| ISBN: | 978-1-987820-04-1 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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PRODUCTION OF PELLETS STARTING FROM FINES MANGANESE ORE NOT PREVIOUSLY ROASTED1
Joao B. Conti de Souza1; Nathane P. Scardine2;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: 235
Topic: 2
Abstract:
The objective is to produce pellets of lower cost with the appropriate technical qualities, to be used in metallurgic reactors, using fine manganese ore and additional substances, there by substituting the grinding stages, thickening, and homogenization and filtering by grinding in the roller press, thusly eliminating the stage of prior calcination of the ores. For the grinding process, only the particles with a size smaller than 1mm were selected. Limestone powder and binder were added to the ground ore and the components were mixed. During the agglomeration process, water is added to the mixture until the appropriate humidity is reached, there by producing crude pellets. During the thermal process, the crude pellets undergo stages of controlled drying, pre-burning and burning. Through knowledge of the mechanisms of transformations of phases with the increase of the temperature, to which the ore is subjected, it is possible to elaborate an appropriate thermal cycle to control the burning stage, reducing in that way destructive effects and degradation of the pellets, obtaining a product with chemical qualities (reduction / elimination of the heavy elements), physical qualities (high compression strength and low abrasion index) and metallurgic qualities, to withstand effects of handling, long distance transport and processing in the reactors.