GB/T 2899-2017Barium sulphate precipitated for industrial use (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 2899-2008 "Barium sulphate precipitated for industrial use". Compared with GB/T 2899-2008, the main technical changes except for editorial changes are as follows.

- ADD the index and test method of sulfide content (see 4.2 and 5.11);

- ADJUST the requirements of barium sulfate, volatiles at 105 °C, iron, whiteness, fineness index (see 4.2; 4.2 of the 2008 edition);

- MODIFY the particle size distribution to the median particle size and ADJUST the index requirements (see 4.2; 4.2 of the 2008 edition).

1 Scope

This standard specifies the requirements, test methods, inspection rules, markings, labels, packaging, transportation and storage of barium sulphate precipitated for industrial use.

This standard applies to barium sulphate precipitated for industrial use. This product is mainly used in coatings, inks, pigments, rubber, batteries, plastics and coated paper, metal smelting and other industries.

2 Normative references

The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this standard.

GB/T 191-2008 Packaging - Pictorial marking for handling of goods

GB/T 1717-1986 Determination of pH value of an aqueous suspension of pigments

GB/T 3049-2006 Chemical products for industrial use. General method for determination of iron content - 1, 10-Phenanthroline spectrophotometric method

GB/T 5211.2 Determination of matter soluble in water of pigments-Hot extraction method

GB/T 5211.3 Determination of matter volatile of pigments at 105 °C

GB/T 5211.15-2014 General test methods for pigments and extender pigments - Part 15: Determination of oil absorption

3 Molecular formula and relative molecular mass

Molecular formula. BaSO4.

Relative molecular mass. 233.34 (according to 2016 international relative atomic mass).

4 Requirements

5 Test method

Warning - Persons using this standard shall have practical experience in formal laboratory work. This standard does not point out all possible safety issues.

6 Inspection rules

6.1 This standard uses type inspection and exit-factory inspection. Type inspection and exit-factory inspection shall meet the following requirements.

6.2 The barium sulphate precipitated for industrial use of the same grade as produced continuously (or by the same shift) by the manufacturer using the same materials, basically the same production conditions form a batch. Each batch of products does not exceed 120 t.

6.3 Determine the number of sampling units according to the provisions of GB/T 6678. When sampling, the sampler is inserted vertically from the center of the packaging bag to sample at 3/4 of the depth of the material layer.

6.4 If an index of inspection results does not meet the requirements of this standard, it shall take sample from twice the amount of packaging for re-inspection. If an index of the re-inspection does not meet the requirements of this standard, the entire batch of products is unqualified.

7 Markings and labels

7.1 There shall be a firm and clear mark on the packing bag of the barium sulfate precipitated for industrial use. The content of marking includes manufacturer name, factory address, product name, grade, net content, batch number (or production date), this standard number, the markings of "Avoid sun exposure" or "Avoid rain" as specified in GB/T 191-2008.

8 Packaging, transportation and storage

8.1 Barium sulphate precipitated for industrial use is packed in double layers.

The inner packaging uses polyethylene plastic film bags; the outer packaging uses plastic woven bags. […]