Production of minerals paste from phosphates sludge

ABSTRACT The most used method for the disposal of phosphates tailings is through of tailing dams conventional. The tailing disposal in the form of mineral paste has advantages compared with the disposal conventional. The objective of this work is the production and characterization of mineral pastes...

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Autores principales:	Olcay-B.,R.H., Hernández-O.,C.A., Valadão,G.E.S., Chaves,A.P.
Lenguaje:	English
Publicado:	Universidad de Tarapacá. 2020
Materias:	Thickening mineral paste rheology
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-33052020000200335
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spelling	oai:scielo:S0718-330520200002003352020-08-04Production of minerals paste from phosphates sludgeOlcay-B.,R.H.Hernández-O.,C.A.Valadão,G.E.S.Chaves,A.P. Thickening mineral paste rheology ABSTRACT The most used method for the disposal of phosphates tailings is through of tailing dams conventional. The tailing disposal in the form of mineral paste has advantages compared with the disposal conventional. The objective of this work is the production and characterization of mineral pastes from phosphates sludges using a thickener in laboratory scale. The main results were: a) the specific gravity of solid material: 2.61 g/cm3; b) sludge 100% < 30 μm; c) the chemical analysis indicated the principals presence of magnesium, calcium, phosphorus and oxygen; d) the mineralogy detected the presence calcite and dolomite as main phases; e) sample showed high value of the superficial specific area through Blaine method was 0.976 m2/g; f) the thickening tests time required for maximum compression point of phosphate mud without the use of flocculant was 7,200 s; g) the tests continuous sedimentation using recirculation and the use of flocculant selected increased by approximately 6% solids in the underflow; h) a transition stage of high slurry density to mineral paste in the range between 55% and 58% solids was observed; i) concerning to generations of flocs, the FGR system presented a discharge more dense of solids concentration in all operational range; j) an increase of around 7% solids in the underflow was noted using rake system; k) with the best operational conditions in the equipment were obtained paste minerals of 70% solids; l) the yield stress of phosphate sludge showed values greater than 80 Pa from 65% solids characteristic of mineral paste.info:eu-repo/semantics/openAccessUniversidad de Tarapacá.Ingeniare. Revista chilena de ingeniería v.28 n.2 20202020-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-33052020000200335en10.4067/S0718-33052020000200335
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Thickening mineral paste rheology
spellingShingle	Thickening mineral paste rheology Olcay-B.,R.H. Hernández-O.,C.A. Valadão,G.E.S. Chaves,A.P. Production of minerals paste from phosphates sludge
description	ABSTRACT The most used method for the disposal of phosphates tailings is through of tailing dams conventional. The tailing disposal in the form of mineral paste has advantages compared with the disposal conventional. The objective of this work is the production and characterization of mineral pastes from phosphates sludges using a thickener in laboratory scale. The main results were: a) the specific gravity of solid material: 2.61 g/cm3; b) sludge 100% < 30 μm; c) the chemical analysis indicated the principals presence of magnesium, calcium, phosphorus and oxygen; d) the mineralogy detected the presence calcite and dolomite as main phases; e) sample showed high value of the superficial specific area through Blaine method was 0.976 m2/g; f) the thickening tests time required for maximum compression point of phosphate mud without the use of flocculant was 7,200 s; g) the tests continuous sedimentation using recirculation and the use of flocculant selected increased by approximately 6% solids in the underflow; h) a transition stage of high slurry density to mineral paste in the range between 55% and 58% solids was observed; i) concerning to generations of flocs, the FGR system presented a discharge more dense of solids concentration in all operational range; j) an increase of around 7% solids in the underflow was noted using rake system; k) with the best operational conditions in the equipment were obtained paste minerals of 70% solids; l) the yield stress of phosphate sludge showed values greater than 80 Pa from 65% solids characteristic of mineral paste.
author	Olcay-B.,R.H. Hernández-O.,C.A. Valadão,G.E.S. Chaves,A.P.
author_facet	Olcay-B.,R.H. Hernández-O.,C.A. Valadão,G.E.S. Chaves,A.P.
author_sort	Olcay-B.,R.H.
title	Production of minerals paste from phosphates sludge
title_short	Production of minerals paste from phosphates sludge
title_full	Production of minerals paste from phosphates sludge
title_fullStr	Production of minerals paste from phosphates sludge
title_full_unstemmed	Production of minerals paste from phosphates sludge
title_sort	production of minerals paste from phosphates sludge
publisher	Universidad de Tarapacá.
publishDate	2020
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-33052020000200335
work_keys_str_mv	AT olcaybrh productionofmineralspastefromphosphatessludge AT hernandezoca productionofmineralspastefromphosphatessludge AT valadaoges productionofmineralspastefromphosphatessludge AT chavesap productionofmineralspastefromphosphatessludge
_version_	1714203481078759424

Production of minerals paste from phosphates sludge

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