This standard specifies the classification and labeling, requirements, test methods, inspection rules, marking, packaging, transportation and storage with respect to diatomite products.
This standard is applicable to natural diatomite products.
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 2007 General rules for the sampling and sample preparation of minerals in bulk
GB/T 5816 Catalysts and absorbents - Determination of surface area
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
3 Classification and labeling
3.1 Product classification
Diatomite products are classified into six classes according to diatom content, which are represented by Roman numerals I, II, III, IV, V and VI.
3.2 Product labeling
A diatomite product is labeled with its product name, this standard number and its class code in sequence.
Example: the second-class diatomite is labeled as
Diatomite JC/T 414-II
?
4 Requirements
4.1 Appearance
Diatomite products are not allowed to contain foreign inclusions, and powdery products shall be loose.
4.2 Microstructure
When diatomite products are observed under a microscope, complete diatom shells or shell fragments with certain geometry and pore structure may be seen.
4.3 Physical and chemical properties
The physical and chemical properties of diatomite products shall be in accordance with those specified in Table 1.
