Mechanochemical treatment of high silica bauxite with lime

Paul Mccormick; T. Picaro; P.A.I. Smith

doi:10.1016/S0892-6875(01)00207-2

Mechanochemical treatment of high silica bauxite with lime

Paul Mccormick, T. Picaro, P.A.I. Smith

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Abstract

The mechanochemical processing of bauxite with lime has been investigated. The milling of bauxite and lime mixtures in an attritor mill resulted in the formation of an iron rich hydrogarnet phase in bauxite/lime slurries containing greater than 9% CaO. Up to 90% of the quartz contained in the bauxite was found to have been removed by the hydrogarnet reaction. The hydrogarnet compound was stable during the high temperature alumina extraction step, resulting in a 30% drop in caustic soda consumption. Alumina extraction was not influenced by the mechanochemical processing. (C) 2002 Elsevier Science Ltd. All rights reserved.

Original language	English
Pages (from-to)	211-214
Journal	Minerals Engineering
Volume	15
Issue number	2002
DOIs	https://doi.org/10.1016/S0892-6875(01)00207-2
Publication status	Published - 2002

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title = "Mechanochemical treatment of high silica bauxite with lime",

abstract = "The mechanochemical processing of bauxite with lime has been investigated. The milling of bauxite and lime mixtures in an attritor mill resulted in the formation of an iron rich hydrogarnet phase in bauxite/lime slurries containing greater than 9% CaO. Up to 90% of the quartz contained in the bauxite was found to have been removed by the hydrogarnet reaction. The hydrogarnet compound was stable during the high temperature alumina extraction step, resulting in a 30% drop in caustic soda consumption. Alumina extraction was not influenced by the mechanochemical processing. (C) 2002 Elsevier Science Ltd. All rights reserved.",

author = "Paul Mccormick and T. Picaro and P.A.I. Smith",

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AU - Mccormick, Paul

AU - Picaro, T.

AU - Smith, P.A.I.

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N2 - The mechanochemical processing of bauxite with lime has been investigated. The milling of bauxite and lime mixtures in an attritor mill resulted in the formation of an iron rich hydrogarnet phase in bauxite/lime slurries containing greater than 9% CaO. Up to 90% of the quartz contained in the bauxite was found to have been removed by the hydrogarnet reaction. The hydrogarnet compound was stable during the high temperature alumina extraction step, resulting in a 30% drop in caustic soda consumption. Alumina extraction was not influenced by the mechanochemical processing. (C) 2002 Elsevier Science Ltd. All rights reserved.

AB - The mechanochemical processing of bauxite with lime has been investigated. The milling of bauxite and lime mixtures in an attritor mill resulted in the formation of an iron rich hydrogarnet phase in bauxite/lime slurries containing greater than 9% CaO. Up to 90% of the quartz contained in the bauxite was found to have been removed by the hydrogarnet reaction. The hydrogarnet compound was stable during the high temperature alumina extraction step, resulting in a 30% drop in caustic soda consumption. Alumina extraction was not influenced by the mechanochemical processing. (C) 2002 Elsevier Science Ltd. All rights reserved.

U2 - 10.1016/S0892-6875(01)00207-2

DO - 10.1016/S0892-6875(01)00207-2

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VL - 15

SP - 211

EP - 214

JO - Minerals Engineering

JF - Minerals Engineering

IS - 2002

ER -

Mechanochemical treatment of high silica bauxite with lime

Abstract

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