The standard specifies method summary, instruments and equipment, test procedures and result statement of plastometric indices.
The standard is applicable to bituminous coal.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding amending errors in the text) to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest editions of these documents are applicable. For undated references, the latest edition of the normative documents referred to applies.
GB 474-1996 "Method for Preparation of Coal Sample"
GB/T 483-1998 General Rules for Analytical and Testing Methods of Coal
GB 5751-1986 Classification of Chinese Coals
3 Method Summary
As specified, put the coal sample into the coal cup, arrange the cup on tailor-made electric stove to be heated unilaterally, temperature rise at specified speed and the coal sample forms such three isothermal layers as semi-coke layer, plastometric layer and non-tenderized coal sample. Measure the maximum thickness Y of colloid with probe, and final shrinkage degree X from the test volume curve.
4 Instruments and Equipment
4.1 Double-cup plastometric determinator: one type is provided with poising nut (See Figure 1) and the other without poising nut (all the other structure is the same as in Figure 1 except the poising nut).
