This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, quality certificate and contract (or order form) contents of zinc oxide produced by direct method.
This standard is applicable to zinc oxide produced from zinc concentrate by pyrometallurgy. The zinc oxide produced by direct method is mainly used in rubber, coating, ceramic, cable, glass, enamel, petroleum, chemical and other industries.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 1709 Covering power determination of dyestuff
GB/T 3185 Zinc oxide (indirect method)
GB/T 4104 Leucoscopic method for testing whiteness of zinc oxide made by direct process
GB/T 4372 (All parts) Methods for chemical analysis of zinc oxide produced by direct process
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 105Centigrade
GB/T 5211.15 Determination of oil absorption value of pigments
GB/T 5211.16 Comparison of lightening power of white pigments
GB/T 5211.18 Determination of residue on sieve of pigments - Water method - Manual procedure
GB/T 6678 General principles for sampling chemical products
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
3 Requirements
3.1 Product classification
See Table 1 for the classification, grade and designation of zinc oxide.
