This standard specifies principle, apparatus, test procedure, expression of result and method precision for determination of roga index (R.I.) of 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
3 Principle
1 g of bituminous coal sample and 5 g standard anthracite for roga index test 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 roga index can be calculated from the test results.
