Caracterização e avaliação da utilização de aglomerantes orgânicos e inorgânicos na aglomeração de finos de calcário
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Data
2016-08-01
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Universidade Federal de Goiás
Resumo
Modern agriculture requires productivity, efficiency and quality. Therefore, there is need for the
application of agricultural lime to correct the soil acidity. The Midwest was appointed as the
largest producer of agricultural limestone, with 38.2% and Goiás and holder of 11.6%. In limestone
beneficiation process is the generation of fine material (through in # 400 (0.035 mm)), which does
not have economic viability in the agricultural, metallurgical and calcination. This is because this
particle size of particle decreases the percolation of gas in blast furnaces and has slow settling
when used in agriculture, can be transported by wind generating environmental liabilities.
Briquetting is to agglomeration of fine particles by pressure, aided or not by a binder, allowing
obtaining not only compacts, but with size, shape and mechanical parameters. The objective of this
study was to investigate the binding of fine limestone through briquetting through use of a specific
type known to have very fine grained (<0.075 mm) using organic and inorganic binders.
Agglomeration of fine limestone through the briquetting was conducted by varying the amounts of
water (used as inorganic binding agent) 0; 5; 7.5; 10; 12.5% and 2.5; 5; 7.5 and 8.5% organic
binders - Molasses Soy and Treacle of cane sugar. The limestone powder and briquettes were
analyzed chemically and physically by Scanning Electron Microscopy, Energy Dispersive X-ray
(EDS), chemical and particle size analysis. The briquettes were subjected to impact resistance test,
resistance to breakdown in water and compressive strength. The best results in impact resistance
tests were analyzed and from these results of other tests were performed. The results of mechanical
impact resistance were analyzed statistically by analysis of variance (ANOVA), checking if the
binder content and factors influenced the agglomeration of the mineral. In addition to lowering the
environmental liabilities, the briquettes will also generate profits for the mining industry and can
offer a co-product with similar characteristics to the product originally marketed.
Descrição
Palavras-chave
Aglomeração, Briquetagem, Calcário, Aglomerantes orgânicos, Resistência mecânica ao impacto, Agglomeration, Briquetting, Limestone, Organic binders, Mechanical impact resistance
Citação
BARROS, M. R. Caracterização e avaliação da utilização de aglomerantes orgânicos e inorgânicos na aglomeração de finos de calcário. 2016. 119 f. Dissertação (Mestrado em Gestão Organizacional) - Universidade Federal de Goiás, Catalão, 2016.