GB/T 217-2008Determination of true relative density of coal (English PDF)

1 Scope

This standard specifies the truth of coal density determination of terms and definitions, methods feeds, reagents and materials, equipment, measuring step, junction

If the calculation and precision.

This standard applies to anthracite, bituminous and lignite.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent

Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research

Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB/T 212 industrial analysis of coal (GB/T 212-2008, ISO 11722.1999, ISO 1171.1997, ISO 562.

1998, NEQ)

3 Terms and Definitions

The following terms and definitions apply to this standard.

3.1

20 °C, mass ratio of coal (not including coal pores) with the quality and volume of water.

4 Method summary

Sodium dodecyl sulfate solution as wetting agents, the coal sample vial wet density settlement and exclude gas adsorption, according to the coal discharged

The same volume of water mass calculated density of coal truth.

5 Reagents and materials

Sodium dodecyl sulfate. chemically pure, 20g/L. Weigh 20g sodium lauryl sulfate is dissolved in water and diluted to 1L.

6 Equipment