Light burning powder UDC 669.721-492.2 Q 43

People's Republic of China national standard

GB 9354-88

Light burned magnesia powder

Caustic burned magnesia

1988-0 6-14 release 1989-10-01 implementation

Issued by the National Bureau of standards

1. theme content and scope of application

This standard stipulates the technical requirements, test methods, inspection rules, marks, packaging, transportation, storage and quality certificate of light-burned magnesia powder.

This standard is suitable for light burnt magnesia powder used in papermaking, chemical industry, building materials, rubber, ceramics, animal husbandry and manufacturing magnesia

2 reference standards

Light burning powder

GB 5069 magnesia refractory analysis method

General regulations for packaging, marking and quality certificates of GB 5689 gold mining products

3 Classification

Light burnt magnesia powder can be divided into nine grades according to its chemical composition: QM-96, QM-95, QM-94, QM-92, QM-90, QM-87, QM-85, QM-80 and QM-75.

4 technical requirements

Physical and chemical indicators should meet the requirements of Table 1.

5 test method

5.1 the chemical analysis method was carried out according to GB 5069.

5.2 Particle size was determined by international standard sieving test, i.e. 120 meshes and 100 meshes were tested by international standard sieving test with aperture of 0.125 mm and 0.15 mm, respectively.

6 inspection rules

6.1 the weight of each batch is not greater than 120 t.

6.2 Samples for particle size determination should be sampled before group batches and samples for chemical analysis should be sampled after group batches. 25kg take one sample per 20 bags, and each big bag (1000kg) takes one sample.

After mixing the obtained granularity samples, the particle size was determined by 10~20g. After mixing, the samples were reduced to 200g and sent to laboratory for analysis.

6.3 If a chemical composition is unqualified or abnormal, double quantity of samples will be re-examined in the same batch of products, and the re-examination results will be the final inspection results of the batch of products.

7 marks, packaging, transportation, storage and certificate of quality

7.1 the finished product must be stored in wet storage.

7.2 The finished transport equipment must be kept clean and equipped with rain and snow protection facilities, and must be strictly protected from dampness and pollution during transportation.

In addition to the above 7.3 provisions, other related matters shall be carried out according to GB 5689.

Add-on:

The standard grade mark GB 9354-88 I of this standard.