Application of dry grinding to reduction in transformation temperature of aluminum hydroxides

Junya Kano; Shu Saeki; Fumio Saito; Mitsuo Tanjo; Shuichi Yamazaki

doi:10.1016/S0301-7516(00)00005-3

Application of dry grinding to reduction in transformation temperature of aluminum hydroxides

Junya Kano, Shu Saeki, Fumio Saito, Mitsuo Tanjo, Shuichi Yamazaki

Center for Mineral Processing and Metallurgy (CMPM)

Research output: Contribution to journal › Article › peer-review

41 Citations (Scopus)

Abstract

Dry grinding of gibbsite (α-Al(OH)₃) and pseudo (p)-boehmite (γ-AlO(OH)) powder samples separately, with and without fine α-alumina powder as a seed, was conducted using a planetary ball mill to investigate effects of grinding and addition of the seed on their transformation temperatures to α-phase during heating. The transformation temperatures of both samples reduced to below 1000°C with increasing grinding time as well as the amount of seed. The transformation temperatures depend on the grinding time and the amount of seed, and the minimum temperatures are about 910°C for gibbsite and about 950°C for p-boehmite when they are ground for more than 60 min with an equivalent amount of the seed powder. Combination of grinding with addition of the seed would be an effective operation for the reduction in the transformation temperature of both compounds to α-phase. (C) 2000 Elsevier Science B.V. All rights reserved.

Original language	English
Pages (from-to)	91-100
Number of pages	10
Journal	International Journal of Mineral Processing
Volume	60
Issue number	2
DOIs	https://doi.org/10.1016/S0301-7516(00)00005-3
Publication status	Published - 2000 Sep 1

Keywords

Gibbsite pseudo-boehmite
Grinding
Mechanical activation
Transformation temperature
α-alumina

ASJC Scopus subject areas

Geotechnical Engineering and Engineering Geology
Geochemistry and Petrology

Access to Document

10.1016/S0301-7516(00)00005-3

Fingerprint Dive into the research topics of 'Application of dry grinding to reduction in transformation temperature of aluminum hydroxides'. Together they form a unique fingerprint.

Cite this

@article{89597dbc30a3405fb3ea1d62cf59c4b8,

title = "Application of dry grinding to reduction in transformation temperature of aluminum hydroxides",

abstract = "Dry grinding of gibbsite (α-Al(OH)3) and pseudo (p)-boehmite (γ-AlO(OH)) powder samples separately, with and without fine α-alumina powder as a seed, was conducted using a planetary ball mill to investigate effects of grinding and addition of the seed on their transformation temperatures to α-phase during heating. The transformation temperatures of both samples reduced to below 1000°C with increasing grinding time as well as the amount of seed. The transformation temperatures depend on the grinding time and the amount of seed, and the minimum temperatures are about 910°C for gibbsite and about 950°C for p-boehmite when they are ground for more than 60 min with an equivalent amount of the seed powder. Combination of grinding with addition of the seed would be an effective operation for the reduction in the transformation temperature of both compounds to α-phase. (C) 2000 Elsevier Science B.V. All rights reserved.",

keywords = "Gibbsite pseudo-boehmite, Grinding, Mechanical activation, Transformation temperature, α-alumina",

author = "Junya Kano and Shu Saeki and Fumio Saito and Mitsuo Tanjo and Shuichi Yamazaki",

year = "2000",

month = sep,

day = "1",

doi = "10.1016/S0301-7516(00)00005-3",

language = "English",

volume = "60",

pages = "91--100",

journal = "International Journal of Mineral Processing",

issn = "0301-7516",

publisher = "Elsevier",

number = "2",

}

TY - JOUR

T1 - Application of dry grinding to reduction in transformation temperature of aluminum hydroxides

AU - Kano, Junya

AU - Saeki, Shu

AU - Saito, Fumio

AU - Tanjo, Mitsuo

AU - Yamazaki, Shuichi

PY - 2000/9/1

Y1 - 2000/9/1

N2 - Dry grinding of gibbsite (α-Al(OH)3) and pseudo (p)-boehmite (γ-AlO(OH)) powder samples separately, with and without fine α-alumina powder as a seed, was conducted using a planetary ball mill to investigate effects of grinding and addition of the seed on their transformation temperatures to α-phase during heating. The transformation temperatures of both samples reduced to below 1000°C with increasing grinding time as well as the amount of seed. The transformation temperatures depend on the grinding time and the amount of seed, and the minimum temperatures are about 910°C for gibbsite and about 950°C for p-boehmite when they are ground for more than 60 min with an equivalent amount of the seed powder. Combination of grinding with addition of the seed would be an effective operation for the reduction in the transformation temperature of both compounds to α-phase. (C) 2000 Elsevier Science B.V. All rights reserved.

AB - Dry grinding of gibbsite (α-Al(OH)3) and pseudo (p)-boehmite (γ-AlO(OH)) powder samples separately, with and without fine α-alumina powder as a seed, was conducted using a planetary ball mill to investigate effects of grinding and addition of the seed on their transformation temperatures to α-phase during heating. The transformation temperatures of both samples reduced to below 1000°C with increasing grinding time as well as the amount of seed. The transformation temperatures depend on the grinding time and the amount of seed, and the minimum temperatures are about 910°C for gibbsite and about 950°C for p-boehmite when they are ground for more than 60 min with an equivalent amount of the seed powder. Combination of grinding with addition of the seed would be an effective operation for the reduction in the transformation temperature of both compounds to α-phase. (C) 2000 Elsevier Science B.V. All rights reserved.

KW - Gibbsite pseudo-boehmite

KW - Grinding

KW - Mechanical activation

KW - Transformation temperature

KW - α-alumina

UR - http://www.scopus.com/inward/record.url?scp=0034281829&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034281829&partnerID=8YFLogxK

U2 - 10.1016/S0301-7516(00)00005-3

DO - 10.1016/S0301-7516(00)00005-3

M3 - Article

AN - SCOPUS:0034281829

VL - 60

SP - 91

EP - 100

JO - International Journal of Mineral Processing

JF - International Journal of Mineral Processing

SN - 0301-7516

IS - 2

ER -