2013
DOI: 10.1590/s0366-69132013000200020
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Caracterização tecnológica de um calcário dolomítico in natura, calcinado e sulfatado como meio dessulfurante

Abstract: ResumoCalcários são muito utilizados na captura das emissões gasosas sulfurosas emitidas durante a queima do carvão na geração de energia, por meio de sua injeção em caldeiras e fornalhas. A caracterização técnica deste material torna-se necessária à correta seleção e utilização de uma rocha calcária. Neste trabalho, foi realizada a análise técnica e microestrutural dessa matéria-prima, incluindo-se a caracterização dos parâmetros físico-químicos, texturais e microestruturais do calcário in natura, calcinado e… Show more

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Cited by 5 publications
(3 citation statements)
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References 11 publications
(16 reference statements)
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“…The phases identified in the residue of dolomitic base, are identical to those presented in the characterization study of dolomitic limestone carried out by Souza & Bragança [30], except for the zeolite presence. The authors attributed the peaks located in the region close to 10º 2θ to a mineral clay, considering it as an impurity of the limestone rock.…”
Section: X-ray Diffractionsupporting
confidence: 71%
“…The phases identified in the residue of dolomitic base, are identical to those presented in the characterization study of dolomitic limestone carried out by Souza & Bragança [30], except for the zeolite presence. The authors attributed the peaks located in the region close to 10º 2θ to a mineral clay, considering it as an impurity of the limestone rock.…”
Section: X-ray Diffractionsupporting
confidence: 71%
“…Table 3 presents the chemical composition of the used dolomitic carbonate, obtained by X-ray spectrometry fluorescence in the STD-1 (Standardless) calibration, concerning the analysis of chemical elements between fluorine and uranium. The Loss on Ignition (LOI) was carried out at 1020°C for 2 h. It is emphasized that according to reference [103], the high concentration of the compounds MgO (15.5-17.2%), SiO 2 (4.51-4.06%) and CaO (36.4-33.8%) corresponds to dolomitic calcareous samples. In this way, dolomitic carbonate rock samples were disintegrated and classified using the following steps.…”
Section: Proposal For Carbonate Plug Constructionmentioning
confidence: 99%
“…The chemical composition of the dolomitic carbonate rock from outcrop is reported in Table 3. Concerning the analysis of chemical elements between fluorine and uranium, higher concentrations of CaO (36.4%), MgO (15.5%), SiO 2 (4.51%) and LOI (41.9%) were observed, which according to Souza and Bragança (2013) and Dolomite Mineral Data (2018) corresponds to a dolomitic carbonate sample. From the base material preparation, five particle size intervals were obtained: 300-600 lm, 150-300 lm, 74-150 lm, 20-74 lm and <20 lm.…”
Section: Construction Of the Samples With Disk Geometrymentioning
confidence: 94%