Title

PRÉ-CONCENTRAÇÃO DE CARVÃO MINERAL ASSISTIDO POR SENSOR DE RAIOS-X EM EQUIPAMENTO SORTING

MINERAL COAL PRECONCETRATION USING X-RAY SENSOR SORTING EQUIPMENT

Authorship

Veras, Moacir Medeiros; Young, Aaron Samuel; Weiss, Anderson Luis; Miltzarek, Gerson Luis; Castaman, Marina Signor; Freitas, Fernando Leinhard de; Petter, Carlos Otávio; Sampaio, Carlos Hoffmann

Veras, Moacir Medeiros

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Young, Aaron Samuel

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Weiss, Anderson Luis

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Miltzarek, Gerson Luis

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Castaman, Marina Signor

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Freitas, Fernando Leinhard de

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Petter, Carlos Otávio

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Sampaio, Carlos Hoffmann

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DOI

10.5151/2594-357X-30439

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Abstract

A tecnologia de sensor-based sorting faz uso de sensores high-tech para pré-concentrar seletivamente partículas de minérios que tenham teores toleráveis para planta de beneficiamento, rejeitando as partículas que são totalmente estéreis ou rejeitos. A pré-concentração de carvão assistido pelo método Dual Energy X-Ray Transmition possibilita separar seletivamente o carvão com melhor quantidade de matéria orgânica das rochas silicáticas com maior densidade. O objetivo desse trabalho foi investigar a afinidade da tecnologia de sorting na pré-concentração do carvão mineral da Carbonífera do Cambuí/PR assistido por sensor de raios-x. Os testes foram realizados em dois lotes cujo range granulométrico foi -4”+2” e -2”+1”. A pré-concentração foi feita em 2 cortes de separação, o primeiro para retirar o rejeito e o segundo para obter 2 tipos de produtos. Os resultados indicaram que 52,15% da massa foi rejeitada, concentrando 47,85% do material de carvão na fração média -2”+1”. Na fração grossa -4”+2” foi rejeitado 62,51% da massa e concentrado 37,49% de carvão. As análises imediatas dos pré-concentrados mostraram que na fração grossa houve redução de 44,57% de cinzas totais e houve aumento de 4,59% para 8,29% de enxofre [S], enquanto na fração média a redução foi de 36,98% de cinzas totais e de 1,19 % [S].

Sensor-based sorting is a technology that uses high-tech sensors to selectively separate ore particles which are acceptable to beneficiation plants from material that is totality barren or waste. The pre-concentration of coal assisted by the Dual Energy X-Ray Transmission method allows for the selective separation of coal with the best amount of organic matter from silica waste rocks with higher density. The objective of this study is to investigate the affinity of sorting technology for mineral coal pre-concentration in Paraná supported by x-ray sensor. Tests were performed in two batches of size ranges -4”+2” (coarse) and -2”+1”(medium). The pre-concentration occurred in two phases of separation, the first was to remove waste and the second was to obtain two product types. The results indicated that 52.15% of the mass was rejected, concentrating 47.85% of the coal matter for the medium size range (-2”+1”). For the coarse size range (-4”+2”), 62.51% of mass was rejected and 37.49% of the coal was concentrated. Immediate analyses of the pre-concentrates showed that in the coarse fraction there was a reduction of 44.57% of ash content and an increase from 4.59% to 8.29% in Sulphur content, while the medium fraction there was a reduction of 36.98% in ash and 1.19% in Sulphur.

Keywords

Pré-concentração, Carvão, Sorting, Sensor, Raios-x.

Preconcentration, Coal, Sorting, Sensor, X-Ray.