Characterization of a coal tailing deposit for integrated mine waste management in the brazilian coal field of Santa Catarina

被引：20

作者：

do Amaral Filho, Juarez R. ^{[1
]}

Schneider, Ivo Andre H. ^{[1
]}

de Brum, Irineu A. S. ^{[2
]}

Sampaio, Carlos H. ^{[1
]}

Miltzarek, Gerson ^{[1
]}

Schneider, Carlos

机构：

[1] PPGEM UFRGS, Porto Alegre, RS, Brazil

[2] DEMET UFRGS, Porto Alegre, RS, Brazil

来源：

REM-REVISTA ESCOLA DE MINAS | 2013年 / 66卷 / 03期

关键词：

Coal tailings; coal preparation; environment;

D O I：

10.1590/S0370-44672013000300012

中图分类号：

学科分类号：

摘要：

Brazilian coals contain high levels of impurities (pyrite and sedimentary rocks minerals), requiring concentration procedures. The coal tailing deposits demand a large physical area, whose topography is changed and acid mine drainage (AMD) is generated. The aim of this work was to characterize a typical coal tailing deposit in the carboniferous region of Santa Catarina, seeking the separation of three fractions for future reuse: (a) a fraction for energy production; (b) a fraction composed mainly by silicate minerals; and (c) a fraction with a high concentration of pyrite. The work methodology consisted in sample collection and characterization of the material. The characterization included particle size analysis, dissymmetric studies, XRD analysis, petrography studies, and acid-base accounting tests. The results showed that 68% of the material is composed of coarse particles, 15% of fine particles, and 17% of slurry from settling ponds. It is possible, by gravimetric concentration of the material, to recover 33.7% for energetic application and 10.3% as a pyrite concentrate. The remaining material, with intermediate density, will have a decrease of about 60% in its net acid generation potential and presents potential for application in civil engineering construction.

引用

页码：347 / 353

页数：7

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