GB/T 6609.23-2004Chemical analysis methods and determination of physical performance of alumina -- Preparation and storage of test samples (English PDF)

802.1976 into 3.3.3.1 of this Standard; while combine the third to the fifth paragraphs

into 3.3.3.2 of this Standard.

This Standard was proposed by China Nonferrous Metals Industry Association.

This Standard shall be under the jurisdiction of National Technical Committee on Nonferrous

Metals of Standardization Administration of China.

This Standard was entrusted to Chalco Zhengzhou Research Institute and China Nonferrous

Metals Industry Standards, Metrology and Quality Research Institute for drafting.

This Standard was drafted by Chalco Zhengzhou Research Institute.

Chief drafting staffs of this Standard. Meng Fuhai, Chen Jing, Lu Peiqian, and Chu Bingwu.

This Standard was entrusted to National Technical Committee on Nonferrous Metals of

Standardization Administration of Chian for interpretation.

This Standard was first-time published hereby.

Chemical Analysis Methods and Determination of Physical

Performance of Alumina – Preparation and Storage of Test

Samples

3.1 Laboratory sample

The laboratory sample shall be prepared according to the method specified in GB/T 6609.22.

3.2 Original specimen

The original specimen is primarily used for determining certain geometric properties, physical

tests, physicochemical tests, and moisture determination.

Weigh approximately 500 g of laboratory sample and place it into a sealed container, ideally

just enough to be filled with the sample.

3.3 Drying specimen

The drying specimen is used for composition analysis and determination of certain geometric

properties as well as physical and physicochemical tests.

3.3.1 Principle

The test materials were ground and sieved until all of them passed through a 0.125 mm test

mesh.

The test materials were thoroughly mixed and dried at 300°C.

3.3.2 Equipment

Common laboratory equipment and.

3.3.2.1 Test sieve. 0.125 mm mesh. Made of materials that do not introduce impurities to be

measured. Select the test sieve based on the properties of the alumina and the impurities to be

measured.

3.3.2.2 Corundum mortar.

3.3.3 Procedure

3.3.3.1 Sieve 100g~200g of laboratory sample (3.1) through the test sieve (3.3.2.1). Grind the

coarse material on the sieve using a corundum mortar (3.3.2.2), and sieve again. Thoroughly

mix the sieving with the initial sieving. Repeat the grinding, sieving, and mixing process until

all the specimens passes through the test sieve.