GB/T 24487-2022Alumina (English PDF)

Foreword

This document was drafted in accordance with the rules given in GB/T 1.1-2020, Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.

This document replaces GB/T 24487-2009, Alumina. Compared with GB/T 24487- 2009, in addition to structural adjustments and editorial changes, the main technical changes are as follows.

a) Change the scope of application (see Chapter 1; Chapter 1 of the 2009 edition);

b) Change the classification of alumina designations, add AO-G designation, and delete AO-3 designation (see Chapter 4; 3.1 of the 2009 edition);

c) Change the requirements for chemical compositions and physical properties (see 5.1 and 5.2; 3.2 and 3.3 of the 2009 edition);

d) Change the calculation rules for Al2O3 content (see 6.1.2; 3.2.1 of the 2009 edition);

e) Change the contents of inspection and acceptance (see 7.1; 5.1 of the 2009 edition);

f) Change the provisions on batch weight in batch (see 7.2; 5.2 of the 2009 edition);

g) Add requirements for sample preparation (see 7.4.3).

1 Scope

This document specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, quality certificate and order form (or contract) contents of alumina (Al2O3).

This document applies to alumina produced from raw materials such as bauxite, recycled alumina raw materials, etc., used for the production of metallic aluminum by molten salt electrolysis, as well as to alumina used as raw materials for the production of corundum, ceramics, refractory products and other alumina chemical products.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 6609.1, Chemical analysis methods and determination of physical performance of alumina - Part 1: Determination of trace elements content - Inductively coupled plasma atomic emission spectrometry method

GB/T 6609.2, Chemical analysis methods and determination of physical performance of alumina - Part 2: Determination of loss of mass at 300 °C and 1 000 °C

GB/T 6609.3, Chemical analysis methods and Determination of physical performance of alumina - Determination of silicon dioxide content - Molybdenum blue photometric method

GB/T 6609.4, Chemical analysis methods and determination of physical performance of alumina - Determination of ferric oxide content - Orthophenanthroline photometric method

GB/T 6609.5, Chemical analysis methods and Determination of physical performance of alumina - Determination of sodium oxide content

GB/T 6609.13, Chemical analysis methods and Determination of physical performance of alumina - Determination of calcium oxide content - Flame atomic absorption spectrophotometric method

GB/T 6609.24, Chemical analysis methods and Determination of physical performance of alumina - Measurement of the angle of repose

GB/T 6609.25, Chemical analysis methods and determination of physical performance of alumina - Part 25: Method for the determination of tapped and untapped density

GB/T 6609.27, Chemical analysis methods and determination of physical performance of alumina - Part 27: Particle size analysis - Sieves method

GB/T 6609.30, Chemical analysis methods and determination of physical performance of alumina - Part 30: Determination of trace elements - Wavelength dispersive X-ray fluorescence spectrometric method

GB/T 6609.32, Chemical analysis methods and determination of physical performance of alumina - Part 32: Determination of a-alumina content by X-ray diffraction

GB/T 6609.33, Chemical analysis methods and determination of physical performance of alumina - Part 33: Determination of attrition index

GB/T 6609.35, Chemical analysis methods and determination of physical performance of alumina - Part 35: Determination of specific surface area - Nitrogen adsorption method

GB/T 6609.36, Chemical analysis methods and determination of physical performance of alumina - Part 36: Determination of flow time

GB/T 8170, Rules of rounding off for numerical values & expression and judgement of limiting values

GB/T 19077.1, Particle size analysis - Laser diffraction method

3 Terms and definitions

No terms and definitions need to be defined in this document.

4 Designation

Alumina is divided into three designations according to its main chemical compositions and physical properties. AO-G, AO-1 and AO-2.

6 Test methods

7 Inspection rules

9 Order form (or contract) contents

The order form (or contract) for the materials listed in this document shall include the following.

a) product name;

b) designation;

c) net content;

d) a reference to this document; e) others.