This standard specifies principle, reagents and materials, apparatus, coal sample, test procedure, expression of result, method precision and test report for determination of caking index for bituminous coal.
This standard is applicable to bituminous coal.
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 474 Method for Preparation of Coal Sample
GB/T 483 General Rules for Analytical and Testing Methods of Coal
GB/T 14181 Specifications of Anthracite for Determination of Caking Index of Bituminous Coal
3 Principle
A portion of prepared sample of coal of limited size range and the standard anthracite are mixed under defined conditions, and the mixture is carbonized rapidly. The crucible coke thus obtained is tested for strength in a drum conforming to certain specifications. The caking power of the test sample is expressed by the abrasive strength, i.e. resistance to breakage of the crucible coke.
