This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of direct zinc oxide. This standard applies to zinc oxide obtained by pyrometallurgical treatment of zinc concentrate as raw material. Direct zinc oxide is mainly used in rubber, coatings, cables, glass, ceramics, enamel, petroleum, chemical and other industries. GB/T 3494-1996 Direct zinc oxide GB/T3494-1996 Standard download decompression password: www.bzxz.net

—1996
GB/T 3494
This standard is a revision of GB3494-83 based on national conditions and with reference to Japanese, German and British standards, with major changes in technical content and clauses. Nine technical indicators of impurity lead oxide, water-soluble matter and sieve residue are tightened to meet user requirements, and two technical indicators of hydrochloric acid insoluble matter are appropriately relaxed; two technical indicators of ignition loss are added; arbitration sampling methods have been greatly changed, which improves the advancement and versatility of this standard.
This standard replaces GB3494-83 from the date of entry into force. This standard was proposed by China Nonferrous Metals Industry Corporation. The responsible drafting unit of this standard: Shuikoushan Mining Bureau The drafting unit of this standard: Shuikoushan Mining Bureau The main drafters of this standard: Tang Aiqun, Xia Derong 155
1 Scope
National Standard of the People's Republic of China
Zinc oxide produced by direct method
Zinc oxide produced by direct methodGB/T 3494-1996
Replaces GB3494-83
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of zinc oxide produced by direct method. This standard is applicable to zinc oxide produced by pyrometallurgical treatment with zinc concentrate as raw material. Direct zinc oxide is mainly used in rubber, coating, cable, glass, ceramics, porcelain, petroleum, chemical industry and other industries. Molecular formula: ZnO
Relative molecular mass: 81.384 (1989 international relative atomic mass) 2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When the standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T1709-79 Determination of hiding power of pigments
GB/T3185-92 Zinc oxide (indirect method) GB/T4104-83 Direct method Zinc oxide whiteness (color) test method Zinc oxide (direct method) Chemical analysis method
GB/T 4372-843
GB/T5211.2-85 Determination of water-soluble matter of pigments Hot extraction method GB/T5211.3-85 Determination of volatile matter of pigments at 105 (Determination of oil absorption of pigments
GB/T 5211.15--88
GB/T5211.16--88 Comparison of tinting power of white pigments Determination of pigment sieve residue Water method Manual operation GB/T 5211. 1888
GB/T6678-86 General rules for sampling of chemical products 7 Rules for rounding off values
GB 8170-87
3 Requirements
3.1 Classification and grades
The classification, grade and grade of zinc oxide are specified in Table 1. Approved by the State Administration of Technical Supervision on November 4, 1996156
Implementation on April 1, 1997
3.2 Chemical composition and physical properties
GB/T 3494-—1996
Classification, grade and grade of zinc oxide
ZnO-X1
ZnO-X2
ZnO-T1
ZnO-T2
ZnO-T3
The chemical composition and physical properties of various grades of zinc oxide shall comply with the provisions of Table 2. Table 2 Chemical composition and physical properties of zinc oxide
Indicator items||t t||Zinc oxide (on dry basis), not less than %
Lead oxide (PbO), not more than %,
Cadmium oxide (CdO), not more than %,
Copper oxide (CuO), not more than %,
Manganese (Mn), not more than %,
Metallic zinc
Hydrochloric acid insoluble matter, not more than %,
Ignition loss, not more than %,
Water soluble matter, not Greater than, %
Sieve residue (45m wet sieve), less than, %105C volatile matter, less than, %
Hiding power, less than, g/m
Oil absorption, less than, g/100g
Color-reducing power, less than, %
Color (compared with standard sample)
Note: If there are special requirements, the supply and demand parties shall negotiate. 3.3 Zinc oxide should not contain foreign inclusions. 3. 4 Zinc oxide should be in the form of white powder.
Test method
ZnO-x1
The determination of chemical composition shall be carried out in accordance with the provisions of GB4372. 4.1
ZnO-X2
The determination of hydrochloric acid insoluble matter shall be carried out in accordance with the provisions of 5.6 of GB/T3185-92. 4.2
The determination of loss on ignition shall be carried out in accordance with the provisions of 5.7 of GB/T3185-92. 4.3
4.4The determination of water-soluble matter shall be carried out in accordance with the provisions of GB5211.2. The determination of sieve residue shall be carried out in accordance with the provisions of GB5211.18. 4.5
4.6105CThe determination of volatile matter shall be carried out in accordance with the provisions of GB5211.3. 4.7
The determination of hiding power shall be carried out in accordance with the provisions of GB1709. The determination of oil absorption shall be carried out in accordance with the provisions of GB5211.15. Main uses
Mainly used in rubber and other industrial sectors
Mainly used in coatings and other industrial sectors
ZnO-T1
ZnO-T2
Conforms to standard samples
ZnO-T3
GB/T 3494—1996
4.9 The determination of tinting power shall be carried out in accordance with the provisions of GB5211.16. 4.10 The determination of color shall be carried out in accordance with the provisions of GB4104. 5 Inspection rules
5.1 Batch
Each batch of products shall consist of products of the same brand, and the batch weight is not limited. 5.2 Sampling methods for re-inspection and arbitration
5.2.1 Sampling shall be carried out in batches for re-inspection and arbitration. The number of samples shall be in accordance with the provisions of GB6678, see Table 3. Table 3 Provisions for re-inspection and arbitration sampling
Number of bags of total (batch) products
102~125
126151
152181
182~216
217~254
255~296
297~343
344394Www.bzxZ.net
395~450
451~512
Minimum number of sampling bags
3×N (N is the total number of bags in the batch)
5.2.2 When sampling, insert the sampling stick into the three-quarters depth of the bag with complete and clean packaging. The sampling amount of each bag shall not be less than 50g. After the sample is taken out, it should be immediately placed in a clean, airtight container, and then fully mixed and divided into quarters until the weight is not less than 1500g. Divide the sample into 3 parts, put them into ground-mouth bottles, seal them with white wax, and label them with the manufacturer's name, product name, brand, batch number and sampling date. The supplier and the buyer shall keep one copy each, and the other copy shall be used for arbitration. 5.3 Inspection and Acceptance
5.3.1 The product shall be inspected by the supplier's quality inspection department to ensure that the product quality meets the requirements of this standard, and fill in the product quality certificate. 5.3.2 The buyer has the right to accept the received products in accordance with the provisions of this standard. When the acceptance result does not meet the requirements of this standard, it shall be submitted to the supplier within two months from the date of receipt of the product, and the supplier and the buyer shall negotiate to resolve it. If arbitration is required, the arbitration sampling shall be carried out jointly by the supplier and the buyer at the buyer's side, and the arbitration unit shall be agreed upon by the supplier and the buyer. The arbitration analysis result shall be the final result. 5.3.3 The processing of analysis data shall be carried out in accordance with the provisions of GB8170-87. 6 Marking, packaging, transportation, storage and quality certificate 6.1 Marking, packaging
6.1.1 Zinc oxide is packed in plastic film bags lined with plastic woven bags as outer bags, which must be tightly sealed and moisture-proof. According to user needs, the net weight of each 158
bag is 25kg or 50kg.
GB/T 3494-1996
6.1.2 The packaging bag should be printed with a non-fading mark indicating the product name, manufacturer's name and address, trademark, brand, net weight and obvious words such as "Prevent moisture, handle with care", and be accompanied by a product certificate indicating the batch number and production date. 6.2 Transportation, storage
6.2.1 The product should be handled with care and should not be bumped or dropped to prevent damage. It must not come into contact with polluted items such as acids and alkalis during transportation, and strict anti-corrosion measures must be taken.
6.2.2 The product must be stored in a dry and clean place, strictly prevent moisture, and must be isolated from acid, alkali and other pollutants. The effective storage period of zinc oxide is half a year.
6.3 Quality Certificate
Each batch of products should be accompanied by a quality certificate, indicating: a) manufacturer name;
b) product name;
c) brand;
d) batch number, batch weight and number of bags;
e) various analysis results and stamp of the inspection department; f) this standard number;
g) date of manufacture.
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